COMPONENTS
VOL. 3

CONTENTS

Contents

4LASERSSER VICES
Metrology andquality assurance
Crystal materials development
and refurbishment
Optical design
Optomechanical engineering

4

6

Passive Q-switch crystals

60

LASER COMPONENTS

106
104

POLARIZATION OPTICS

164
162

LASER ACCESSORIES

198
196

8

Cr:YAG crystals
V:YAG crystals
Co:Spinel crystals

62
64
66

Coated laser components

106
108
108
110
110
112
112
114
114
116
116
118
118
120
120
122

Crystalline quartz waveplates
Achromatic (broadband) waveplates
Mid-infrared (IR) waveplates
Glan-type polarizers
Polarizing cubes
Brewster-type thin-film polarizers
High-contrast thin-film polarizers

164
166
166
168
168
170
170
172
172
174
174
176
176
178

Infrared (IR) viewers ABRIS M
Contour near infrared (IR)CCD camera
Contour near infrared (IR)digital CMOS camera
UV-NIR laser beam visualizers

198
200

Laser line mirrors
Broadband laser mirrors
Dual and multi wavelength mirrors
Variable reflectivity mirrors
Laser cavity output couplers
Wavelength separators and combiners
Flat and curved metal-coated mirrors

BEAM DELIVERY DEVICES

180
178

GENERALTERMS
AND of Sale
GeneralTerms
and Conditions
CONDITIONS OF SALE

206
204

Lenses124
122

Plano-convex spherical lenses
Plano-concave spherical lenses
Bi-convex spherical lenses
Bi-concave spherical lenses
Plano-convex cylindrical lenses
Plano-concave cylindrical lenses
Axicons (conical lenses)

126
124
128
126
130
128
132
130
134
132
136
134
138
136

Prisms140138

Dispersing prisms
Right-angle prisms
Corner cube retroreflectors
Penta prisms

142
140
144
142
146
144
147
145

Windows and substrates

148
146

Flat-parallel windows
Flat-wedge windows
Curved windows

150
148
152
150
154
152

Filters

156
154

Neutral density (by absorption) filters
Bandpass (inter ference) filters
Circular variable neutral density filters

158
156
160
158
162
160

8
9
9
9

CRYSTALS

10

Laser crystals

12

Ti:Sapphire crystals
Cr:LiSAF crystals
Pr:YLF crystals
Ho:YLF crystals
Tm, Ho:KYW crystals
Nd:YAG crystals
Nd:KGW crystals
Nd:YLF crystals
Nd:YVO 4 crystals
Yb:KGW crystals
Yb:KYW crystals
Yb:YAG crystals
Yb:CaF 2 crystals
Yb:YVO
crystals
Yb:YAB 4crystals
Er:KYW
Yb:YAP crystals
Yb:YAB
crystals
Yb:YLF crystals
Yb:YAP
Yb:YVO 4crystals
crystals
Yb:YLF
Er:KYW crystals
crystals
Er:YAG crystals
Er:YLF crystals
Er, Yb:phosphate glass
Er,Yb:YAB crystals
Tm:YLF crystals
Tm:KYW crystals

14
16
18
20
22
24
26
28
30
32
34
36
38
40
41
42
42
44
44
46
46
47
48
50
52
54
56
58

Nonlinear crystals

68

BBO crystals
LBO crystals
KTP crystals
KDP, DKDP crystals
Lithium niobate crystals
CdSe crystals
AgGaS 2 crystals
AgGaSe 2 crystals
ZnGeP 2 crystals
GaSe crystals

70
72
74
76
78
79
80
82
84
86

Raman crystals

86

Raman
Barium crystals
nitrate crystals
KGW crystals
Bariumnitrate crystals
KYW crystals
KGW
crystals

88
86
90
88
92
90

KYW crystals
Photorefractive crystals

94
92
94

Photorefractive
crystals
BSO crystals
Fe:LiNbO
crystals
BSO crystals
3
SBN crystals
Fe:LiNbO
3 crystals
BGO crystals
crystals
SBN

96
94
96
98
96
100
100
98
102
102
100

BGO crystals

104
102

Compact motorised beam
expanders MEX
High-power motorized beam
expanders MEX-HP
Variable beam expanders VEX
and reducers VRE
Fixed ratio beam
expanders FEX
Motorized laser power
attenuators LPA
Advanced motorized laser power
attenuators LPA-A
Manual laser power
attenuators LPA-M
Manual 4 Axis translation stage

200
202
201
203
202
204

180
182
182
184
184
186
186
188
188
190
190
192
192
194
194
196

sales@4Lasers.com

5

ABOUT US

W h e re i t a l l b e g a n
4Lasers is a division of thehigh-techhigh-tech
Optogama
Optogama
company,
company,
which
which
waswasestablishedestablishedin 2015,
in 2015,
Vilnius.
Vilnius.
The Thedivision
division
withwithyoung
a young
and ambitious
andteam was createdambitious
team wasin ordercreatedto in
supplyorderhighto supply
qualityhighcrystals
qualityandcrystals
opticalandelements,
optical beam
elements,
deliverybeam
devices,deliveryaccessories,
devices, accessories,
laser setups.
laser
setups.
In the past decades photonics and laser physics has undergone a revolution, driven by new methods of generating, controlling, anddetectingIn
the pastphotons.
decades Nowadays,
photonics anda lotlaserof well-establishedphysics have undergone
and state-of-art
a revolution,laser systems
driven byaretheused
newin variety
methods
of ofresearch
generating,fields,controlling,industry. On
the otheranddetectinghand,photons.
the demand
Nowadays,of new,acompact
lot of well-establishedand low-cost laserand state-of-art
sources for laser
everydaysystems
life isare
growingused inmore
a varietythanofever.
research fields,
industry. On the other hand, the demand of new, compact and low-cost laser sources for everyday life is growing more than ever.
Every optical element of laser system has to be carefully designed, produced, inspected and prepared for use. And here 4Lasers teamcomesopticalEveryinto play!
element of laser system has to be carefully designed, produced, inspected and prepared for use. And here 4Lasers teamcomes into play!
4Lasers main capabilities and specialties
4 LProductiona s e r s m a iof
n standard
c a p a b i landi t i e custom
s a n d slaserp e c iopticala l t i e scomponents, laser and nonlinear crystals■■ Production
Design and ofdevelopment
standard andofcustomcustomlaser
laseropticalgain, opticalcomponents,
modules,laser
andandbeam
nonlineardeliverycrystals
devices■ Design
Development
and development
and productionof customof different
laser gain,
laser opticalcrystal hosts
modules,
and andion dopant
beam delivery
combinations
devices■ Development
Conventional andand stateproductionof the artof different
laser optics
laser crystal hosts and ion dopant combinations■ Conventional
Refurbishmentand
of opticalstate ofelements,
the art laser
crystals
optics■ Refurbishment
Clear room environment,of optical elements,
optical design,
crystalsmechanical design, in-house CNC machining■ Clean room environment, optical design, mechanical design, in-house CNC machining

About usW hy yo u s h o u l d c h o o s e u s■ Over 15 years of experience in laser and photonics industry■ >90% of staff with technical background in Laser Physics■ Strength in custom design and production of opticalcomponents, beam delivery devices■ Highly efficient communication and short lead time evenfor custom production■ Assurance of standardized production and quality■ Guaranteed superior price-performance ratio
4Lasers members are looking forward to cooperating with you and implement your ideas and projects from
4Lasers
members
forwardto cooperatingwith youandneeds
implementing
your ideas and projects fromscratch till
the end.are
Dolookingnot hesitate
to contact
us and discuss
yourvia sales@4Lasers.com.
scratch till the end. Do not hesitate to contact us and discuss your needs via sales@4Lasers.com.

6

sales@4Lasers.com

7

SERVICES

Metrology andquality assurance
4Lasers provide the following in-house
metrology and quality assurance services:■ Wavefront distortion measurements intransmittance/reflectance for parallel andspherical optical elements (Verifire, Zygo)■ Transmittance and reflectance measurentsof optical elements
measurementsof opticalin 200elements
nm - 1700
innm
200
wavelengthnm- 1700 nm
range
wavelength(Photonrange
RT, Essent(PhotonOptics)RT,
Essent Optics)■ Optical microscopy with polarized light
option (Olympus)■ Laser beam quality measurements (BeamSquared, Ophir)■ Laser wavelength stability measurementswith 3 pm resolution (WS6, HighFinesse)■ Laser performance, coating durability,
glue aging, etc. measurements in different
environmental conditions (MKF 56, Binder)

Services8

In partnership with scientific and industrial
partners we are able to offer custom
metrology and quality assurance services.

Crystal material
development andrefurbishment
4Lasers has capabilities to develop andproduce different optical crystals hosts andion dopant combinations. Our strength relies
in theon
thefollowing:
following:■ Laser gain media (Yb:KGW, Yb:KYW,
Ti:Sapphire, Yb:CaF2, Pr:YLF, Tm:YLF, Ho:YLF,
Er:YLF)■ Passive Q-switch elements (crystalline orceramic Co:Spinel, Cr:YAG, V:YAG)■ Photorefractive crystals (BSO, BGO, SBN)
Crystal material development is realized
together with scientific and industrial
government,
partners through numerous governments,
industry and internally funded R&D contracts.
For damaged crystals we provide costeffective crystal refurbishment service,including repolishing, recoating andcharacterization.

Optical design andengineering

Optomechanicalengineering

From simple lenses to complex assemblies,
4Lasers offers
offer lowlowandandhigh-power,
high-power,diffractionlimited optical
diffractionlimited
solutions
opticalforsolutions
particularforlaser or
imaging applications.
particularlaser or imaging applications.

4Lasers team of highly skilled andexperienced mechanical engineers provide
complete mechanical design services for a
new product or improvement of an existing
design and its functionality.

Optical, mechanical, electronics and software
engineers enable Optogama to offer a rangeof skills and experience designing andevaluating laser or optical modules according
to the customers inquiries.
Our design solutions are complemented
by our offerings of standard and custom
metrology instruments and service.
Engineering services include:■ Gaussian beam propagation simulation■ Integrated optomechanical and sequential
refractive optical design■ Optics and coatings optimization for highdamage threshold and high transmittance■ Design and production accordingin accordance
to withcustom requirements■ Optical or laser system architecture &design■ Documentation: design, assembly, test, Q/A

We suggest and provide you designs thatmeet your specifications, while also providing
tolerance analysis, performance estimations,manufacturability information.
4Lasers offers:■ Design & fabrication of high precision
opto-mechanical assemblies■ Evaluation and optimization of yourpresent optomechanical systems■ Documentation: design, assembly, test, Q/A

sales@4Lasers.com

9

CRYSTALS

Crystals

Whether you are setting up your laser experiment or integrating
a commercial product, we have competitively high-performance
crystals for your needs.
Do not hesitate to request custom, if the crystal is not in thestandard crystals section.

10

Laser crystals

Pa s s i ve Q - s w i t c h c r y s t a l s

Raman crystals

P h o t o re f r a c t i ve
crystals

Nonlinear crystals

sales@4Lasers.com

11

CRYSTALS

Laser crystals

Laser crystals, glasses and ceramics are used as optical gain
sources in solid-state lasers. These media are typically dopedwith rare-earth ions (e.g. neodymium, ytterbium, or erbium) or
transition metal ions (titanium or chromium).
4Lasers develops and supplies different laser crystal hosts andion dopant combinations for fundamental, applied researchand industrial applications. Available crystal growth techniques:
Stepanov, Modified Flux growth, Kyropoulos and Czochralski.

Ti : S a p p h i re c r y s t a l s

Cr:LiSAF crystals

Pr : Y L F c r y s t a l s

Ho:YLF cr ystals

Tm , H o : K Y W c r y s t a l s

Nd-doped crystals

Yb-doped cr ystals

Er-doped crystals

E r, Y b c o - d o p e d c r y s t a l s

Tm - d o p e d c r y s t a l s
12sales@4Lasers.com

13

CRYSTALS

Ti:Sapphire crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES
Absorption peak wavelength~500 nmAbsorption cross-section at peak wavelength

38 × 10-20 cm2

Laser wavelength

790 (670-1070) nm

Lifetime of energy level3,2 μsEmission cross-section @790 nm

41 × 10-20 cm2

Refractive index @800 nm

1,76

Crystal structure

hexagonal

Density

3,98 g/cm3

Mohs hardness

9

Thermal conductivity

33 Wm-1 K-1

dn/dT

13 × 10-6 K-1

Thermal expansion coefficient

5 × 10-6 K-1

Typical doping level0,1-0,25 at.%

S t a n d a rd p ro d u c t s
Titanium-doped sapphire (Ti3+:Al2O3) is a widely used transition-metal-doped
laser crystal. Ti3+ ion has a very large gain bandwidth, that opens possibility
to obtain very wide wavelength tunability realized in short pulse lasers. To
obtain crystals with good optical quality Ti3+ doping concentration should
M a i n fe a t u re s
■ Excellent thermal conductivity■ Broad gain bandwidth■ Wide range of possible pump wavelengths (typically 532 nm)■ Custom crystals available upon request
Application examples
Mode-locked lasers with ultrashort pulses■ Multi-pass amplifiers and regenerative amplifiers■

14

not exceed 0,25 at.%. Ti:Sapphire crystal is characterized by a short upperstate lifetime and a high saturation power.
All these properties lead to the necessity of using a strongly focused pumpbeam.
Standard specifications
TI:SAPPHIRE CRYSTALS
Orientation

a-cut

Absorption

90-95% of 532 nm pump radiation

Figure of merit>150 (for 15 mm and longer crystals)

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<30 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,15 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm (for 6x6 mm and smaller crystals)

Wavefront distortion

λ/4@632,8 nm

Coatings

AR(R<1%)@532 nm + AR(R<0,3%)@750-850 nm
on both faces

LIDT>2 J/cm2@800 nm, 300 ps

Mount

Unmounted

FACE
DIMENSIONSLENGTHEND FACES3 x 3 mm

5 mm

Brewster-angle cut

3 x 3 mm

5 mm

Right-angle cut

6 x 6 mm

7 mm

6 x 6 mm

COATINGS

SKU

PRICE

Uncoated

6633

880 €

AR/AR@532 nm + 750-850 nm

6632

980 €

Brewster-angle cut

Uncoated

6635

980 €

7 mm

Right-angle cut

AR/AR@532 nm + 750-850 nm

6634

1080 €

6 x 6 mm

10 mm

Brewster-angle cut

Uncoated

6637

980 €

6 x 6 mm

10 mm

Right-angle cut

AR/AR@532 nm + 750-850 nm

6636

1080 €

6 x 6 mm

15 mm

Brewster-angle cut

Uncoated

6639

1080 €

6 x 6 mm

15 mm

Right-angle cut

AR/AR@532 nm + 750-850 nm

6638

1180 €

ø6 mm

20 mm

Brewster-angle cut

Uncoated

6641

1080 €

ø6 mm

20 mm

Right-angle cut

AR/AR@532 nm + 750-850 nm

6648

1180 €

ø12 mm15 mm

Right-angle cut

AR/AR@532 nm + 750-850 nm

6640

2150 €

ø16 mm20 mm

Right-angle cut

AR/AR@532 nm + 750-850 nm

6642

3950 €

ø20 mm

25 mm

Right-angle cut

AR/AR@532 nm + 750-850 nm

6643

4950 €

ø30 mm

25 mm

Right-angle cut

AR/AR@532 nm + 750-850 nm

6644

Requestø40 mm

25 mm

Right-angle cut

AR/AR@532 nm + 750-850 nm

6645

Requestø50 mm

25 mm

Right-angle cut

AR/AR@532 nm + 750-850 nm

6646

Request50 x 50 mm

30 mm

Right-angle cut

AR/AR@532 nm + 750-850 nm

6647

Requestsales@4Lasers.com

15

CRYSTALS

Cr:LiSAF crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Cr3+:LiSAF gain medium possesses a broad emission band in the near infrared
that allows a widely tunable laser operation and generation of ~10 fs lightpulses via mode-locking technique. Cr:LiSAF crystals can be grown witha very low loss level (<0,2%/cm). It enables to construct high-Q-cavities,
M a i n fe a t u re s
Broad absorption and emission bands■ Nonlinear refractive index is about four times lower than that of Ti:Sapphire■ Custom crystals available upon request■

16

Femtosecond lasers and CPA laser systems

670 nmAbsorption cross-section at peak

5,5 × 10-20 cm2

Absorption bandwidth at peak wavelength~100 nm

Laser wavelength

830 (780-920) nm

Lifetime of 4T2 energy level

67 μs

Emission cross-section

5 × 10-20 cm2

Refractive index

1,41

Crystal structure

trigonal

Density

3,45 kg/cm3

Mohs hardness

4

Thermal conductivity

4,6(||a), 5,1 (||c) Wm-1K-1

dn/dT-4,2 × 10-6 K-1 (no), -4,6 × 10-6 K-1 (ne)Thermal expansion coefficient

22 × 10-6(||a) K-1, 3,6 × 10-6(||c) K-1

Typical doping level

0,8-3 at.%resulting in lasing thresholds as low as 2 mW and slope efficiencies above
50%. Moreover, nonlinear refractive index of Cr:LiSAF is about four times
lower than that of Ti:sapphire, which reduces parasitic nonlinearities in theultrashort pulse generation and amplification applications.
Standard specifications■

Application examples

Absorption peak wavelength

S t a n d a rd p ro d u c t s
CR:LISAF CRYSTALS

Orientation

a-cut

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<20 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings

AR(R<1%)@670 nm + AR(R<0,5%)@700-1100 nm
on both faces

Laser induced damage threshold>10 J/cm2@1064 nm, 10 ns

Mount

Unmounted

FACE DIMENSIONS
5 x 5 mm

LENGTH
12 mm

END FACES

DOPINGCOATINGS

SKU

PRICE

Brewster-angle cut

3%Uncoated

7820

770 €

Right-angle cut

3%

AR/AR@670 nm + 700-1100 nm

7819

930 €

sales@4Lasers.com

17

CRYSTALS

Pr:YLF crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Very few laser materials have necessary properties for realization of lasingin the visible spectral range. Trivalent praseodymium (Pr3+) is known to be
an interesting laser ion for using with solid-state lasers in the visible spectral
range because of its energy levels scheme, providing several transitions in the
M a i n fe a t u re s
High absorption and emission cross-sections(~10-19 cm2)
■ Good overlapping of the absorption band in the blue spectral region with theemission lines of the InGaN laser diodes and 2ω-OPSL■ Custom crystals available upon request■

18

Diode-pumped solid-state lasers for precise and efficient processing of
metals such as copper or gold, entertainment industry and science

444 nmAbsorption cross-section at peak

8 × 10-20 cm2

Absorption bandwidth at peak wavelength~5 nm

Laser wavelength

523 nm, 607 nm, 639 nm, 698 nm,
721 nmLifetime of 3P0 energy level

50 μs

Emission cross-section at 640 nm

20 × 10-20 cm2

Refractive index @1064 nm

no = 1,448, ne = 1,470

Crystal structure

tetragonal

Density

3,95 g/cm3

Mohs hardness

5

Thermal conductivity

6 Wm-1K-1

dn/dT-5,2 × 10-6 (||c) K-1, -7,6 × 10-6 (||a) K-1

Thermal expansion coefficient~16 × 10-6 K-1

Typical doping level<1 at.%

red (640 nm, 3P0 to 3F2), orange (607 nm, 3P0 to 3H6), green (523 nm, 3P0 to 3H5),and dark red (720 nm, 3P0 3F3+3F4) spectral regions. Pr3+:YLF has been foundto be a promising laser material for producing visible lasers directly and UV
lasers through intracavity second-harmonic generation.
Standard specifications■

Application examples

Absorption peak wavelength

S t a n d a rd p ro d u c t s
END FACES

DOPINGCOATINGS

SKU

PRICE

Orientation

a-cut

2 x 2 mm

6 mm

Right-angle cut

0,5%AR/AR@440-444 nm + 500-700 nm

7793

480 €

Clear aperture>90%

3 x 3 mm

6 mm

Right-angle cut

0,5%AR/AR@440-444 nm + 500-700 nm

7794

540 €

Face dimensions tolerance+0,0/-0,1 mm

ø5 mm

6 mm

Right-angle cut

0,5%AR/AR@440-444 nm + 500-700 nm

7795

640 €

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/8@632,8 nm

Wavefront distortion

λ/4@632,8 nm

Coatings

AR(R<1%)@440-444 nm + AR(R<0,6%)@500-650 nm +AR(R<1%)@650-725 nm on both faces

Laser induced damage threshold>5 J/cm2@532 nm, 10 ns

Mount

Unmounted

PR:YLF CRYSTALSFACE DIMENSIONS LENGTH

sales@4Lasers.com

19

CRYSTALS

Ho:YLF crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Direct pumping of Ho:YLF crystals excludes losses of Tm3+ to Ho3+ energy
transfer process. Ho3+:YLF crystal is characterized by a long lifetime

Absorption peak wavelength

1940 nmAbsorption cross-section at peak

1,2 × 10-20 cm2

Absorption bandwidth at peak wavelength~18 nmLaser wavelength2060 nm

Lifetime of 5I7 energy level

10 ms

Emission cross-section

1,8 × 10-20 cm2

Refractive index @1064 nm

no = 1,448, ne = 1,470

Crystal structure

tetragonal

Density

3,95 g/cm3

Mohs hardness

5

Thermal conductivity

6 Wm-1K-1

dn/dT-4,6 × 10-6 (||c) K-1, -6,6 × 10-6 (||a) K-1

Thermal expansion coefficient

10,1 × 10-6 (||c) K-1, 14,3 × 10-6 (||a) K-1

Typical doping level

0,5-1%of 5I7 energy level which results in an excellent performance in Q-switched
operation.
S t a n d a rd p ro d u c t s

M a i n fe a t u re s
Long upper laser level lifetime■ High emission cross-section■ Naturally birefringent material■ Low value of dn/dT leading to a weak thermal lensing■ Custom crystals available upon request

Standard specifications■

Application examples
Remote sensing and pollutant detection■ Industry■ Military■

20

FACE DIMENSIONSHO:YLF CRYSTALS

Orientation

a-cut

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings

AR(R<0,35%)@1900-2100 nm on both faces

LIDT>10 J/cm2@2060 nm, 10 ns

Mount

Unmounted

5 x 5 mm
ø8 mm

LENGTHEND FACES

SKU

PRICE

2 mm

Brewster-angle cut

DOPING1%

Uncoated

7857

580 €

2 mm

Right-angle cut

1%

AR/AR@1900-2100 nm

7858

700 €

2 mm

Brewster-angle cut

1%

Uncoated

7859

580 €

2 mm

Right-angle cut

1%

AR/AR@1900-2100 nm

7860

700 €

COATINGS

sales@4Lasers.com

21

CRYSTALS

Tm, Ho:KYW crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Ho3+ ions are characterized by higher emission cross-sections and longer
upper laser level lifetimes compared to their Tm3+ counterparts. Thesefeatures are desirable for a low-threshold and efficient laser operation.
Ho3+ does not possess any strong absorption lines that are well matched tothe outputs of commercially available laser diodes, therefore co-doping of

M a i n fe a t u re s
Large and broad polarized absorption and emission bands■ Efficient energy transfer from Tm3+ to Ho3+
■ High dopant concentration with low concentration-quenching■ Custom crystals available upon request

Ho3+ with Tm3+ is chosen for an efficient operation across the 2 μm region
through the energy transfer route from Tm3+ to Ho3+. Tm, Ho:KYW crystals arecharacterized by large and broad polarized absorption and emission bands,
efficient energy transfer from Tm3+ to Ho3+.

Standard specifications■

Application examples
2 µm lasers for remote sensing (LIDAR technology), metrology and medical
applications■ Pump source of mid-IR optical parametric oscillators (OPOs)■

22

Absorption peak wavelength

802 nmAbsorption cross-section at peak

7,6 × 10-20 cm2

Absorption bandwidth at peak wavelength~4 nm

Laser wavelength2060 nm

Lifetime of 5I7 energy level

1,8 msEmission cross-section @2056 nm

4,7 × 10-20 cm2

Refractive index @1040nm

ng = 2,05, nm = 2,01, np = 1,97

Crystal structure

monoclinic

Density

6,5 g/cm3

Mohs hardness

4-5

Thermal conductivity~3,3 Wm-1K-1

dn/dT

dnm/dT = -9,2 × 10-6 K-1

Thermal expansion coefficient

αp = 1,83 × 10-6 K-1, αm = 10,29 ×
10-6 K-1,
αg = 15,94 × 10-6 K-1

Typical doping level

5 at.% [Tm]0,5 at.% [Ho]S t a n d a rd p ro d u c t s
TM, HO:KYW CRYSTALS

Orientation

Ng-cutClear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings

AR(R<0,5%)@802 nm + AR(R<0,2%)@2000-2100
on both faces

LIDT>10 J/cm2@2060 nm, 10 ns

Mount

Unmounted

FACE
DIMENSIONSLENGTH3 x 3 mm

2 mm

END FACES

DOPING

Brewster-angle cut

Tm 5%, Ho 0,5%

Right-angle cut

Tm 5%, Ho 0,5%

COATINGS

SKU

PRICE

Uncoated

7856

460 €

AR/AR@802 nm + 2002-2100 nm

7855

600 €

sales@4Lasers.com

23

CRYSTALS

Nd:YAG crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Nd3+:YAG crystal is the most widely used solid-state laser material. These
crystals are characterized by relatively small gain bandwidth, which allows
achieving a high gain efficiency and a relatively low lasing threshold.
M a i n fe a t u re s
Isotropic crystal (cubic symmetry)■ High thermal conductivity■ High optical quality and large diameter boules grown by Czochralski growthmethod■ Low lasing threshold and wide absorption band at near 808 nm thatcoincides with the emission of AlGaAs laser diodes■ Custom crystals available upon request

Nd:YAG crystals feature excellent thermal and mechanical properties. Nd:YAGof high optical quality and large diameter can be grown.

24

808 nmAbsorption cross-section at peak

6,7 × 10-20 cm2

Absorption bandwidth at peak wavelength

2,5 nmLaser wavelength1064 nm

Lifetime of 4F3/2 neodymium energy level

250 μsEmission cross-section @1064

3 × 10-19 cm2

Refractive index @1064 nm

1,82

Crystal structure

cubic

Density

4,56 g/cm3

Mohs hardness

8,5

Thermal conductivity~13 Wm-1K-1

dn/dT

9,86 × 10-6 K-1

Thermal expansion coefficient

6,96 × 10-6 K-1

Typical doping level0,6 - 1,3 at. %S t a n d a rd p ro d u c t s
FACE DIMENSIONS
ø3 mmStandard specifications■

ND:YAG CRYSTALS
Orientation[111]

Extinction ratio>28 dB

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<20 arcsec

Perpendicularity error<10 arcmin

Application examples

Protective chamfers<0,1 mm at 45˚

CW and pulsed operation at 1064 nm, 532 nm, 355 nm, 266 nm■ Material processing, welding, cutting■ Laser systems for medical applications

Surface quality

10-5 S-D

Surface flatness<λ/8@632,8 nm

Wavefront distortion

λ/4@632,8 nm

Coatings

AR(R<0,15%)@1064 nm on both sides orHT(T>95%)@808 nm + HR(R>99,5%)@1064 nm/
AR(R<0,15%)@1064 nm■

Absorption peak wavelength

Laser induced damage threshold>10 J/cm2@1064 nm, 10 ns

Mount

Unmounted

ø5 mm

ø3 mm

ø5 mm

3 x 3 mm

LENGTHEND FACES

DOPINGCOATINGS

SKU

PRICE

10 mm

Right-angle cut

0,8%AR/AR@1064 nm

7106

260 €

50 mm

Right-angle cut

0,8%AR/AR@1064 nm

7071

360 €

100 mmRight-angle cut

0,8%AR/AR@1064 nm

7072

440 €

10 mm

Right-angle cut

0,8%AR/AR@1064 nm

7076

280 €

50 mm

Right-angle cut

0,8%AR/AR@1064 nm

7077

390 €

100 mmRight-angle cut

0,8%AR/AR@1064 nm

7078

490 €

10 mm

Right-angle cut

1,1%

AR/AR@1064 nm

7073

260 €

50 mm

Right-angle cut

1,1%

AR/AR@1064 nm

7074

360 €

100 mmRight-angle cut

1,1%

AR/AR@1064 nm

7075

440 €

10 mm

Right-angle cut

1,1%

AR/AR@1064 nm

7079

280 €

50 mm

Right-angle cut

1,1%

AR/AR@1064 nm

7080

390 €

100 mmRight-angle cut

1,1%

AR/AR@1064 nm

7081

490 €

2 mm

Right-angle cut

1,1%

AR/AR@1064 nm

7082

220 €

2 mm

Right-angle cut

1,1%

HT@808 nm + HR@1064 nm/AR@1064 nm

7085

240 €

3 mm

Right-angle cut

1,1%

AR/AR@1064 nm

7083

220 €

3 mm

Right-angle cut

1,1%

HT@808 nm + HR@1064 nm/AR@1064 nm

7086

240 €

5 mm

Right-angle cut

1,1%

AR/AR@1064 nm

7084

220 €

5 mm

Right-angle cut

1,1%

HT@808 nm + HR@1064 nm/AR@1064 nm

7087

240 €

sales@4Lasers.com

25

CRYSTALS

Nd:KGW crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Nd:KGW crystal is a good choice for generation of picosecond laser pulses.
These crystals are characterized by a lower stimulated emission cross-section
compared to Nd:YAG crystals, therefore provide a better performance in
M a i n fe a t u re s
Suitable for generation of picosecond light pulses, well suited for diodepumped lasers■ High storage density and low laser threshold■ Efficient Raman converter■ Custom crystals available upon request

Q-switched operation. It is worth to mention, that it is possible to use the
Nd:KGW laser crystal itself as a Raman converter.

Standard specifications■

Application examples
Diode-pumped Q-switched lasers emitting in the “eye-safe” spectral range forlaser rangefinders■ Raman converter■

26

Absorption peak wavelength

811 nmAbsorption cross-section at peak

28 × 10-20 cm2

Absorption bandwidth at peak wavelength

11 nm

Laser wavelength

1067 nm

Lifetime of 4F3/2 neodymium energy level

130 μsEmission cross-section @1067 nm

21 × 10-20 cm2

Refractive index @1067nm

ng = 2,033, np = 1,937, nm = 1,986

Crystal structure

Monoclinic

Density

7,25 g/cm3

Mohs hardness

4-5

Thermal conductivity~3 Wm-1K-1

dn/dT

dnp/dT = -15,7×10-6 K-1
dnm/dT = -11,8×10-6 K-1
dng/dT = -17,3×10-6 K-1

Thermal expansion coefficient

αp= 1,60 × 10-6 K-1, αm= 4 × 10-6 K-1,
αg= 8,5 × 10-6 K-1

Typical doping level

2-10 at.%

S t a n d a rd p ro d u c t s
ND:KGW CRYSTALSFACE DIMENSIONSLENGTHCOATINGS

SKU

PRICE

Orientationb(Np)-cut,

3 x 3 mm

5 mm

Right-angle cut

END FACES
3%

DOPING

AR/AR@808-811 nm + 1067 nm

7798

480 €

Clear aperture

>90%

ø3 mm

60 mm

Right-angle cut

3%

AR/AR@1067 nm

7800

780 €

Face dimensions tolerance+0,0/-0,1 mm

3 x 3 mm

3 mm

Right-angle cut

5%

AR/AR@808-811 nm + 1067 nm

7796

480 €

Length tolerance±0,1 mm3 x 3 mm

5 mm

Right-angle cut

5%

AR/AR@808-811 nm + 1067 nm

7797

480 €

Parallelism error<10 arcsec

ø3 mm

5 mm

Brewster-angle cut

5%Uncoated

7799

420 €

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings

AR(R<0,5%)808-811 nm + AR(R<0,15%)@1067 nm
on both faces

Laser induced damage threshold>10 J/cm2@1067 nm, 10 ns

Mount

Unmounted

sales@4Lasers.com

27

CRYSTALS

Nd:YLF crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIESσπ

Nd3+:YLF crystal is characterized by a long lifetime of 4F3/2 neodymium
energy level. Compared to Nd:YAG, the lower thermal conductivity and aweak negative dn/dT lead to lower thermal distortions and allow to achieve
M a i n fe a t u re s
Long lifetime of 4F3/2 neodymium energy level■ Considerably softer and more brittle than Nd:YAG is■ Nd:YLF (a-cut) crystals that are used inside a laser optical resonator are selfpolarizing■ Custom crystals available upon request

CW and pulsed operation at 1047nm and 1053 nm■ Material processing, welding, cutting■

28

792 nmAbsorption coefficient at peak

10 cm-1

Absorption bandwidth at peak wavelength~5 nm

Laser wavelength

1047, 1053 nm

Lifetime of 4F3/2 neodymium energy level

485 μsEmission cross-section

15 × 10-20 (E||C) cm2@1047 nm
10 × 10-20 (E⊥C) cm2@1053 nm

Refractive index @1064 nm

no = 1,448, ne = 1,470

Crystal structure

tetragonal

Density

3,95 g/cm3

Mohs hardness

5

Thermal conductivity

6 Wm-1K-1

dn/dT-4,6 × 10-6 (||c) K-1, -6,6 × 10-6 (||a) K-1

Thermal expansion coefficient

8 × 10-6 (||c) K-1, 13 × 10-6 (||a) K-1

Typical doping level1-2 at. %a better output beam quality. Another distinctive feature is the high UVtransparency, which is favorable for pumping with xenon flashlamps.

Standard specifications■

Application examples

Absorption peak wavelength

S t a n d a rd p ro d u c t s
ND:YLF CRYSTALS

Orientation

a-cut, c-cut

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/8@632,8 nm

Wavefront distortion

λ/4@632,8 nm

Coatings

AR(R<0,5%)@790-810 nm + AR(R<0,2%)@1047-1053 nm on both faces

Laser induced damage threshold>10 J/cm2@1064 nm, 10 ns

Mount

Unmounted

FACE
DIMENSIONS

ø5 mm

LENGTHEND FACESORIENTATIONDOPING

10 mm
20 mm

Right-angle cut

a-cut

1%

Right-angle cut

a-cut

1%

50 mm

Right-angle cut

a-cut

100 mmRight-angle cut

10 mm

COATINGS

SKU

PRICE

AR/AR@790-810 nm + 1047-1053 nm

7097

480 €

AR/AR@790-810 nm + 1047-1053 nm

7098

540 €

1%

AR/AR@790-810 nm + 1047-1053 nm

7099

Requesta-cut

1%

AR/AR@790-810 nm + 1047-1053 nm

7100

RequestRight-angle cut

c-cut

1%

AR/AR@790-810 nm + 1047-1053 nm

7101

480 €

20 mm

Right-angle cut

c-cut

1%

AR/AR@790-810 nm + 1047-1053 nm

7102

540 €

100 mmRight-angle cut

c-cut

1%

AR/AR@790-810 nm + 1047-1053 nm

7104

Request50 mm

Right-angle cut

c-cut

1%

AR/AR@790-810 nm + 1047-1053 nm

7103

Requestsales@4Lasers.com

29

CRYSTALS

Nd:YVO 4 crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Compared to Nd3+:YAG crystals, the Nd3+:YVO4 crystal has much higher
absorption and emission cross-sections, a broader gain bandwidth andwavelength range for pumping, a shorter upper-state lifetime, a higher
refractive index, thus it is characterized by a lower thermal conductivity.
Nd:YVO4 crystals are well suited for passively mode-locked lasers with highpulse repetition rates. A drawback of Nd:YVO4 lasers is that it is impossible

M a i n fe a t u re s
High absorption and gain cross-sections
Strongly polarization dependent absorption and emission spectra(π-polarization is preferable)■ Shorter (compared with Nd:YAG) upper-state lifetime■ High optical quality and large diameter boules obtained by Czochralski
growth method■ Custom crystals available upon request

Standard specifications30

5,8 × 10-19 cm2

Absorption bandwidth at peak wavelength

16 nm

Laser wavelength1064 nm

Lifetime of 4F3/2 neodymium energy level

90 μs

Emission cross-section @1064 nm

11,4 × 10-19 cm2

Refractive index @1064 nm

no = 1,96, ne = 2,17

Crystal structure

Tetragonal

Density

4,22 g/cm3

Mohs hardness

5

Thermal conductivity~5 Wm-1K-1

dn/dT

3,0 × 10-6 (||c) K-1, 8,5 × 10-6 (||a) K-1

Thermal expansion coefficient

11 × 10-6 (||c) K-1, 4,4 × 10-6 (||a) K-1

Typical doping level

0,1-4 at.%

S t a n d a rd p ro d u c t s
ND:YVO4 CRYSTALS

Orientation

a-cut

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Application examples

Surface quality

10-5 S-D

High repetition rate Q-switched lasers for marking and engraving■ Mode-locked lasers for spectroscopy and research

Surface flatness<λ/8@632,8 nm

Coatings

AR(R<0,5%)@808 nm + AR(R<0,15%)@1064 nm
and HT(T>95%)@ + HR(R>99,8%)@1064 nm/
AR(R<0,2%)@1064 nm

Laser induced damage threshold>10 J/cm2@1064nm, 10 ns

Mount

Unmounted■

808 nmAbsorption cross-section at peakto achieve pulse energies as high as it is achievable with Nd:YAG lasers at
Q-switched operation, due to the lower upper-state lifetime and higher gain
efficiency. In conclusion, Nd:YVO4 is better suited as an active medium ofhigh pulse repetition rate Q-switched lasers and CW lasers with a lower lasing
threshold.

■■Absorption peak wavelength

FACE
DIMENSIONSLENGTH
5 mm
2 mm

3 x 3 mm

3 mm
0,5 mm
1 mm

END FACES

DOPINGCOATINGS

SKU

PRICE

Right-angle cut

1%

AR/AR@808 nm + 1064 nm

7105

280 €

Right-angle cut

1%

HT@808 nm + HR@1064 nm/AR@1064 nm

7092

350 €

Right-angle cut

2%

AR/AR@808 nm + 1064 nm

7089

280 €

Right-angle cut

2%

HT@808 nm + HR@1064 nm/AR@1064 nm

7094

350 €

Right-angle cut

2%

AR/AR@808 nm + 1064 nm

7088

280 €

Right-angle cut

2%

HT@808 nm + HR@1064 nm/AR@1064 nm

7093

350 €

Right-angle cut

3%

AR/AR@808 nm + 1064 nm

7091

280 €

Right-angle cut

3%

HT@808 nm + HR@1064 nm/AR@1064 nm

7096

350 €

Right-angle cut

3%

AR/AR@808 nm + 1064 nm

7090

280 €

Right-angle cut

3%

HT@808 nm + HR@1064 nm/AR@1064 nm

7095

350 €

sales@4Lasers.com

31

CRYSTALS

Yb:KGW crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Yb3+:KGW crystals possess a large gain bandwidth that enables to obtain<100 fs pulse duration in mode-locked regime of operation. Compared withother ytterbium-doped gain media with a similarly large gain bandwidth,ytterbium-doped tungstate has fairly high emission cross-sections. Ytterbium
doping concentration in Yb:KGW crystals can be up to 5 at. % without asignificant quenching. Thermal conductivity of common double tungstates isin the range of 3–4 Wm-1K-1. Yb:KGW crystals exhibit a small quantum defectand it is possible to operate with a quantum defect well below ~4-5%.

Absorption peak wavelength

980 nmAbsorption cross-section at peak wavelength

12 × 10-20 cm2 (E || Nm)

Absorption bandwidth at peak wavelength

3,7 nmLaser wavelength1025 (1020-1060) nm

Lifetime of 2F5/2 ytterbium energy level

240 μsEmission cross-section at 1030 nm

3 × 10-20 cm2 (E || Nm)

Refractive index at 1064 nm

ng = 2,037
np = 1,986
nm = 2,033

Crystal structure

Monoclinic

Density

7,25 g/cm3

Mohs hardness

4-5

Thermal conductivity

Ka = 2,6 Wm-1 K-1
Kb = 3,8 Wm-1 K-1
Kc = 3,4 Wm-1 K-1

dn/dT

dnp/dT = -15,7×10-6 K-1
dnm/dT = -11,8×10-6 K-1
dng/dT = -17,3×10-6 K-1

Thermal expansion coefficient

αp = 1,7 × 10-6 K-1
αm = 11,01 × 10-6 K-1
αg = 17,37 × 10-6 K-1

Typical doping level

1-5 at. %S t a n d a rd p ro d u c t s
M a i n fe a t u re s
Large gain bandwidth■ High emission cross-sections■ Small quantum defect■ High doping level■ High thermal conductivity■ Custom crystals available upon request

Standard specifications■

Application examples
Femtosecond lasers and regenerative amplifiers■ CW and passively mode-locked thin-disk lasers■

FACE DIMENSIONSYB:KGW CRYSTALS

Orientation

Ng-cut, Np(b)-cut

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings

AR(R<0,5%)@970-1070 nm

Laser induced damage threshold>10 J/cm2@1040 nm, 10 ns

Mount

Unmounted

3 x 3 mm5 x 5 mm3 x 3 mm5 x 5 mm3 x 3 mm5 x 5 mm3 x 3 mm5 x 5 mm32

LENGTHDOPING

SKU

PRICE

Brewster-angle cut

Uncoated

7051

540 €

Right-angle cut

1%

AR/AR@970-1070 nm

7049

590 €

10 mm

Brewster-angle cut

1%

Uncoated

7052

540 €

10 mm

Right-angle cut

1%

AR/AR@970-1070 nm

7050

590 €

5 mm

Brewster-angle cut

2%Uncoated

7055

540 €

5 mm

Right-angle cut

2%

AR/AR@970-1070 nm

7053

590 €

5 mm

Brewster-angle cut

2%Uncoated

7056

540 €

5 mm

Right-angle cut

2%

AR/AR@970-1070 nm

7054

590 €

3 mm

Brewster-angle cut

3%Uncoated

7059

540 €

3 mm

Right-angle cut

3%

AR/AR@970-1070 nm

7057

590 €

3 mm

Brewster-angle cut

3%Uncoated

7060

540 €

3 mm

Right angle cut

3%

AR/AR@970-1070 nm

7058

590 €

2 mm

Brewster-angle cut

5%Uncoated

7063

540 €

2 mm

Right-angle cut

5%

AR/AR@970-1070 nm

7061

590 €

2 mm

Brewster-angle cut

5%Uncoated

7064

540 €

2 mm

Right-angle cut

5%

AR/AR@970-1070 nm

7062

590 €

10 mm

END FACESCOATINGS

1%

10 mm

sales@4Lasers.com

33

CRYSTALS

Yb:KYW crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Yb3+:KYW crystals possess a large gain bandwidth that enables to obtain<100 fs pulse duration in mode-locked regime of operation. Compared withother ytterbium-doped gain media with a similarly large gain bandwidth,ytterbium-doped tungstates have fairly high emission cross-sections.
M a i n fe a t u re s
Large gain bandwidth■ High emission cross-sections■ Small quantum defect■ High doping level■ High enough thermal conductivity■ Custom crystals available upon request

Ytterbium doping concentration in Yb:KYW crystals can be very high withouta significant quenching. Thermal conductivity of common double tungstatesis in the range of 3–4 Wm-1K-1. Yb:KYW crystals also feature a small quantum
defect.
Standard specifications■

Application examples
Femtosecond lasers and regenerative amplifiers■ CW and passively mode-locked thin-disk lasers■

34

Absorption peak wavelength

980 nmAbsorption cross-section at peak wavelength

14 × 10-20 cm2 (E || Nm)

Absorption bandwidth at peak wavelength~3 nm

Laser wavelength

1020 (1020-1050) nm

Lifetime of 2F5/2 ytterbium energy level

230 μsEmission cross-section at 1030 nm

2,5 × 10-20 cm2 (E || Nm)

Refractive index at 1064 nm

ng = 2,037
np = 1,986
nm = 2,033

Crystal structure

Monoclinic

Density

6,61 g/cm3

Mohs hardness

4-5

Thermal conductivity~3,3 Wm-1K-1

dn/dT

dnp/dT = -13,08 × 10-6 K-1
dnm/dT = -7,61 × 10-6 K-1
dng/dT = -11,83 × 10-6 K-1

Thermal expansion coefficient

αp = 1,9×10-6 K-1
αm = 10,3×10-6 K-1
αg = 16,5×10-6 K-1

Typical doping level

1-100 at. %S t a n d a rd p ro d u c t s
YB:KYW CRYSTALS

Orientation

Ng-cut, Np(b)-cut

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings

AR(R<0,5%)@970-1070 nm

Laser induced damage threshold>10 J/cm2@1040 nm, 10 ns

Mount

Uncoated

FACE DIMENSIONS
3 x 3 mm5 x 5 mm3 x 3 mm5 x 5 mm3 x 3 mm5 x 5 mm

LENGTHEND FACES

DOPING

SKU

PRICE

5 mm

Brewster-angle cut

2%Uncoated

COATINGS

7037

540 €

5 mm

Right-angle cut

2%

AR/AR@970-1070 nm

7035

590 €

5 mm

Brewster-angle cut

2%Uncoated

7038

540 €

5 mm

Right-angle cut

2%

AR/AR@970-1070 nm

7036

590 €

2 mm

Brewster-angle cut

5%Uncoated

7039

540 €

2 mm

Right-angle cut

5%

AR/AR@970-1070 nm

7041

590 €

2 mm

Brewster-angle cut

5%Uncoated

7042

540 €

2 mm

Right-angle cut

5%

AR/AR@970-1070 nm

7040

590 €

1 mm

Brewster-angle cut

10%

Uncoated

7045

540 €

1 mm

Right-angle cut

10%

AR/AR@970-1070 nm

7043

590 €

1 mm

Brewster-angle cut

10%

Uncoated

7046

540 €

1 mm

Right-angle cut

10%

AR/AR@970-1070 nm

7044

590 €

sales@4Lasers.com

35

CRYSTALSYb:YAG crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Yb3+:YAG crystals feature a 950 us lifetime of the 2F5/2 ytterbium energy level
and a quantum defect of only ~9%. Yb:YAG crystals also possess a broad
pump band at near 940 nm that is more than 10 times broader than the
808 nm pump line of Nd:YAG crystals. It makes Yb:YAG systems less sensitive
M a i n fe a t u re s
Simple electronic structure excludes excited-state absorption and also avariety of detrimental quenching processes■ Broad absorption band at 940 nm■ Long lifetime of the 2F ytterbium energy level
5/2■ Low quantum defect■ Custom crystals available upon request

36

942 nmAbsorption cross-section at peak wavelength

7,7 × 10-21 cm2

Absorption bandwidth at peak wavelength

18 nm

Laser wavelength1030 nm

Lifetime of 2F5/2 ytterbium energy level

950 μsEmission cross-section @1030 nm

2,1 × 10-20 cm2

Refractive index @632,8 nm

1,83

Crystal structure

Cubic

Density

4,56 g/cm3

Mohs hardness

8,5

Thermal conductivity~13 Wm-1 K-1

dn/dT

7,8 × 10-6 K-1

Thermal expansion coefficient

6,2 × 10-6 K-1

Typical doping level

1-20 at. %to thermal shift of pump diodes wavelength. Yb:YAG lasers emit typically ateither 1030 nm (strongest line) or 1050 nm. It is often used in powerful andefficient thin-disk lasers.

Standard specifications■

S t a n d a rd p ro d u c t s
YB:YAG CRYSTALS

Orientation[111]

Extinction ratio>28 dB

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<20 arcsec

Perpendicularity error<10 arcmin

Application examples

Protective chamfers<0,15 mm at 45˚Material processing, micromachining, welding, cutting■ Efficient high power thin-disk lasers

Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Wavefront distortion

λ/4@632,8 nm

Coatings		

AR(R<0,5%)@940 nm + AR(R<0,2%)@1030 nm
on both faces

Laser induced damage threshold>10 J/cm2@1030 nm, 10 ns

Mount

Unmounted■

Absorption peak wavelength

FACE
DIMENSIONSLENGTH
10 mm

5 x 5 mm

2 mm
1 mm

END FACES

DOPINGCOATINGS

SKU

PRICE

Brewster-angle cut

1%

Uncoated

6664

500 €

Right-angle cut

1%

AR/AR@940 nm + 1030 nm

6661

540 €

Brewster-angle cut

5%Uncoated

6663

500 €

Right-angle cut

5%

AR/AR@940 nm + 1030 nm

6660

540 €

Brewster-angle cut

10%

Uncoated

6662

500 €

Right-angle cut

10%

AR/AR@940 nm + 1030 nm

6659

540 €

sales@4Lasers.com

37

CRYSTALS

Yb:CaF 2 crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Yb3+:CaF2 are among most studied and promising crystals for thedevelopment of short-pulse, high-energy, high-power diode-pumped solidstate lasers. There are several reasons that explain this trend. Firstly, calcium
fluoride is a simple cubic crystal whose crystallographic properties are fairly
well known.

M a i n fe a t u re s
Isotropic crystal (cubic symmetry)■ Low quantum defect■ Long lifetime of the 2F ytterbium energy level
5/2■ Wide optical transmission■ Low dispersion behavior■ Limited nonlinear effects under intense laser irradiation■ Custom crystals available upon request

38

976 nmAbsorption cross-section at peak

0,54 × 10-20 cm2

Laser wavelength

1020-1060 nm

Lifetime of 2F5/2 energy level

2,4 msEmission cross-section @1053 nm

0,16 × 10-20 cm2

Refractive index @1040nm

1,43

Crystal structure

cubic

Density

3,18 g/cm3

Mohs hardness

4

Thermal conductivity

5,4 Wm-1K-1

dn/dT-11,3 × 10-6 K-1

Thermal expansion coefficient

18,9 × 10-6 K-1

Typical doping level

1-5 at. %Moreover, this crystal can be grown of large dimension and optical quality.
The simple structure of this crystal contributes to its good thermal properties.
Finally, Yb-doped calcium fluorides feature very broad and smooth emission
bands, which is exceptional for cubic crystals.

Standard specifications■

S t a n d a rd p ro d u c t s
YB:CAF2 CRYSTALS

Orientation[111]

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,15 mm at 45˚Application examples

Surface quality

10-5 S-D

Diode-pumped femtosecond solid-state lasers aiming at the generation ofhigh-energy pulses■ Ultrashort pulses with high average power

Surface flatness<λ/10@632,8 nm

Coatings		

AR(R<0,5%)@980 nm + AR(R< 0,35%)@1040-1070 nm

Laser induced damage threshold>10 J/cm2@1040 nm, 10 ns

Mount

Unmounted■

Absorption peak wavelength

FACE
DIMENSIONSLENGTH
10 mm

ø3 mm

5 mm
3 mm

END FACES

DOPINGCOATINGS

SKU

PRICE

Brewster-angle cut

1%

Uncoated

7032

540 €

Right-angle cut

1%

AR/AR@980 nm + 1040-1070 nm

7029

590 €

Brewster-angle cut

3%Uncoated

7031

540 €

Right-angle cut

3%

AR/AR@980 nm + 1040-1070 nm

7028

590 €

Brewster-angle cut

5%Uncoated

7030

540 €

Right-angle cut

5%

AR/AR@980 nm + 1040-1070 nm

7027

590 €

sales@4Lasers.com

39

CRYSTALS

Er:KYW crystals

Yb:YAB crystals

Pro p e r t i e s

SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Yb3+:YAB is one of the few representatives with multifunctional properties:
as a negative uniaxial crystal, it also possesses nonlinear optical properties,
permitting a direct conversion of the infrared radiation to the visible throughsecond order nonlinear processes. High concentrations of Yb3+ ions can be
M a i n fe a t u re s
Self-doubling laser crystal■ High thermal conductivity■ Wide absorption bandwidth near 976 nm■ High absorption and emission cross-sections■ Low quantum defect■ Custom crystals available upon request

High power CW lasers■ Mode-locked femtosecond lasers■ CW and mode-locked self-doubling lasers■

40

976 nmAbsorption cross-section at peak

3,8 × 10-20 cm2

Absorption bandwidth at peakwavelength

20 nm

Laser wavelength1040 nm

Lifetime of 2F5/2 energy level

680 μsEmission cross-section @1040 nm

0,5 × 10-20 cm2

Refractive index @632.8 nm

no=1,7757, ne=1,7015

Crystal structure

Trigonal

Density

3,84 g/cm3

Mohs hardness

7,5

Thermal conductivity~6 Wm-1K-1

dn/dT

1,4 × 10-6 (IIa) K-1, 4,8 × 10-6 (IIc) K-1

Thermal expansion coefficient

2 × 10-6 (IIa) K-1, 9,5 × 10-6 (IIc) K-1

Typical doping level5-8 wt.%Er3+:KYW are promising laser material for eye-safe emission at wavelengthof 1609 nm, which can be resonantly diode-pumped into the upper laser
manifold at 1534 nm. Due to low quantum defect high-slope efficiencies of>80% can be achieved with direct fiber laser or InGaAs/InP pumping. Because

included in the YAB crystal matrix with little concentration quenching. Yb:YAB
crystals feature good mechanical strength, good thermal conductivity, andstable chemical characteristics.

S tMa an idna fe
rdapt uroredsu c t sStandard specifications■

Application examples

Absorption peak wavelength

YB:YAB CRYSTALS
Orientation

c-cut, a-cut available

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings		

Antireflective (AR) coatings on both faces

Laser induced damage threshold>10 J/cm2@1030 nm, 10 ns (for AR/AR@960-1060
nm coatings)

Mount

Unmounted

Strong absorption bandwidth near
1534 nm corresponding
to InGaAsP/
FACE DIMENSIONS LENGTH
END FACESORIENTATIONDOPINGInP laser diode emission
Right-angle cut
c-cut
10%
■ Wide emission bandwidth near 1600 nm
3 x 3 mm
2 mm
Brewster-angle cut
c-cut
10%
■ Custom crystals available upon request
Right-angle cutθ = 31°, φ = 0°
10%■

Application examples
In-band pumped “eye-safe” CW, Q-swithced and mode-locked lasers■ In-band pumped “eye-safe” waveguide lasers■

4Lasers does not provide standard product list. Please contact us for solutions
and pricing.

of broad and smooth emission in spectral range of 1570 - 1630 nm modelocked “eye-safe” laser can be realized.

Pro p e r t i e s
COATINGSSPECTROSCOPIC
PROPERTIESSKU AND THERMO-MECHANICAL
PRICE

Absorption
AR/AR@960-1060
nmpeak wavelength12826
Absorption cross-section at peakUncoated
12827

5901534
€ nm
-20
cm2
5402,4×10€

Absorption bandwidthat peak
AR/AR@520+976+1040
nm
12828
wavelength

Request
3 nm

Laser wavelength1609 nm

Lifetime of 4I13/2 erbium energy level3,1 msEmission cross-section @1609 nm

0,4×10-20 cm2

Refractive index

ng=2,05, nm=2,01, np=1,97

Crystal structure

monoclinic

Density

6,5 g/cm3

Mohs hardness

4-5

Thermal conductivity~3,5 Wm-1K-1

Typical doping level<20 at. %sales@4Lasers.com

41

CRYSTALSYb:YAP crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Yttrium aluminate doped with Yb3+, (Yb3+YAP) is a biaxial orthorhombic
crystal. YAP crystal hardness and thermal conductivity are similar to YAG
but exhibits a highly anisotropic thermal expansion coefficient and isbirefringent. Emission wavelengths are polarized, while emission and
M a i n fe a t u re s
Biaxial orthorhombic crystal■ High absorption cross-section dependent upon the crystallographic
orientation■ High thermal conductivity■ Low quantum defect■ Custom crystals available upon request

absorption cross-sections are strongly dependent upon the crystallographic
orientation. The absorption cross-sections of the Yb:YAP crystal is higher thanthat of the Yb:YAG crystal.

Standard specifications■

Application examples
Femtosecond lasers and regenerative amplifiers■ CW and passively mode-locked thin-disk lasers■

42

Absorption peak wavelength

978 nmAbsorption cross-section at peak

6,6 × 10-20 cm2

Absorption bandwidth at peak wavelength

4 nm

Laser wavelength1040 nm

Lifetime of 2F5/2 energy level

500 μsEmission cross-section @1040 nm

0,5 × 10-20 cm2

Refractive index @632.8 nm

1,96 (IIa), 1,94 (IIb), 1,97 (IIc)

Crystal structureorthorhombic

Density

5,35 g/cm3

Mohs hardness

8,5

Thermal conductivity

11,7 (||a), 10,0 (||b), 13,3 (||c) Wm-1K-1

dn/dT

7,7 × 10-6 (IIa) K-1, 11,7 × 10-6 (IIb) K-1,
8,3 × 10-6 (IIc) K-1

Thermal expansion coefficient

2,32 × 10-6 (IIa) K-1, 8,08 × 10-6 (IIb) K-1,
8,7 × 10-6 (IIc) K-1

Typical doping level<2 at.%

S t a n d a rd p ro d u c t s
YB:YAP CRYSTALS

Orientation

a-cut

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings		

AR(R<0,25%)@978 nm +AR(R<0,15%)@1020-1070 nm on both sides

Laser induced damage threshold>10 J/cm2@1030 nm, 10 ns

Mount

Unmounted

FACE DIMENSIONS
3 x 3 mm

LENGTH
5 mm

SKU

PRICE

Brewster-angle cut

END FACES

DOPING1%

Uncoated

COATINGS

7826

RequestRight-angle cut

1%

AR/AR@978 nm + 1020-1070 nm

7825

Requestsales@4Lasers.com

43

CRYSTALSYb:YLF crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Yb3+:YLF features a wide emission cross-section, with peak value at the lasing
wavelength comparable to that found in Yb3+:Sr3Y(BO3)3 andM a i n fe a t u re s
Simple electronic structure excludes excited-state absorption and also avariety of detrimental quenching processes■ Broad and smooth emission spectrum■ Wide tunning range■ Absorption spectra are well matched with the emission wavelength of
InGaAs laser diodes■ Low quantum defect■ Custom crystals available upon request

■
■

44

Diode-pumped mode-locked lasers
Thin-disk lasers

960 nmAbsorption cross-section at peak

10,5 × 10-21 cm2

Absorption bandwidth at peak wavelength~10 nmLaser wavelength

1017 nm

Lifetime of 2F5/2 energy level2,1 msEmission cross-section @1053 nm

4,1 × 10-21 cm2

Refractive index @1040nm~1,4

Crystal structure

tetragonal

Density

3,95 g/cm3

Mohs hardness

5

Thermal conductivity

6 Wm-1K-1

dn/dT-4,6 × 10-6 (IIc) K-1, -6,6 × 10-6 (IIa) K-1

Thermal expansion coefficient

8 × 10-6 (IIc) K-1, 13 × 10-6 (IIa) K-1

Typical doping level

5-20 at.%Yb3+:Ca4GdO(BO3)3 laser crystals. Also, the YLF crystal is favorable when highytterbium ion dopant concentrations are desired.

Standard specifications■

Application examples

Absorption peak wavelength

S t a n d a rd p ro d u c t s
FACE DIMENSIONSLENGTHCOATINGS

SKU

PRICE

Orientation

a-cut

3 x 3 mm

8 mm

Right-angle cut

5%

AR/AR@960 nm + 1000-1060 nm

7828

590 €

Clear aperture>90%

3 x 3 mm

8 mm

Brewster-angle cut

5%Uncoated

7829

540 €

Face dimensions tolerance+0,0/-0,1 mm

ø8 mm

8 mm

Right-angle cut

5%

AR/AR@960 nm + 1000-1060 nm

7830

680 €

Length tolerance±0,1 mm3 x 3 mm

4 mm

Brewster-angle cut

10%

Uncoated

7832

540 €

Parallelism error<10 arcsec

3 x 3 mm

4 mm

Right-angle cut

10%

AR/AR@960 nm + 1000-1060 nm

7831

590 €

Perpendicularity error<10 arcmin

ø8 mm

4 mm

Right-angle cut

10%

AR/AR@960 nm + 1000-1060 nm

7833

680 €

Protective chamfers<0,1 mm at 45˚

3 x 3 mm

2 mm

Brewster-angle cut

20%

Uncoated

7835

540 €

Surface quality

10-5 S-D

3 x 3 mm

2 mm

Right-angle cut

20%

AR/AR@960 nm + 1000-1060 nm

7834

590 €

Surface flatness<λ/10@632,8 nm

ø8 mm

2 mm

Right-angle cut

20%

AR/AR@960 nm + 1000-1060 nm

7836

680 €

Coatings

AR(R<0,5%)@960 nm + AR(R< 0,2%)@1000-1060 nm on both faces

Laser induced damage threshold>10 J/cm2@1030 nm, 10 ns

Mount

Unmounted

YB:YLF CRYSTALSEND FACES

DOPING

sales@4Lasers.com

45

CRYSTALS

Er:KYW
crystals
Pro p e r t i e s

Yb:YVO 4 crystals

SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Yb3+:YVO4 crystal has a broad and smooth emission spectrum that allows
wide wavelength tuning ranges and generating ultrashort pulses in mode-

M a i n fe a t u re s
The simple electronic structure excludes excited-state absorption andalso a variety of detrimental quenching processes■ Broad and smooth emission spectrum■ Low quantum defect■ Custom crystals available upon request■

Application examples
High power CW, Q-switched and mode-locked lasers■ Thin-disk lasers■

4Lasers does not provide standard product list. Please contact us for solutions
and pricing.

985 nmAbsorption cross-section at peak

7,5×10-20 cm2

Absorption bandwidth at peak wavelength

5 nm

Laser wavelength

1027 nm

Lifetime of 2F5/2 ytterbium energy level

250 μsEmission cross-section @1027 nm

0,5×10-20 cm2

Refractive index @1064 nm

no = 1,93, ne = 2,1

Crystal structure

tetragonal

Density

4,22 g/cm3

Mohs hardness

5

Thermal conductivity~5 Wm-1K-1

dn/dT

8,41×10-6 (IIc) K-1, 15,5×10-6 ((IIa) K-1

Thermal expansion coefficient

1,5×10-6 (IIa) K-1, 8,2×10-6 (IIc) K-1

Typical doping level1-3 at.%Er3+:KYW is a promising laser material for eye-safe emission at the wavelengthof 1609 nm, which can be resonantly diode-pumped into the upper laser
manifold at 1534 nm. Due to the low quantum defect high-slope efficiencies
of >80% can be achieved with direct fiber laser or InGaAs/InP pumping.

locked lasers. Due to good thermal conductivity Yb:YVO4 crystals can be used
as an active medium in high-power thin-disk lasers.

Because of a broad and smooth emission in the spectral range of 15701630 nm mode-locked “eye-safe” laser can be realized.

Pr o p e r t i e s
S t a n d a r d s p SPECTROSCOPIC
e c i f i c a t i o n s AND THERMO-MECHANICAL PROPERTIES
Absorption peak wavelength

985 nmYB:YVO4 CRYSTALS7,5 × 10-20 cm2

Absorption cross-section at peak
Orientation bandwidth at peak wavelengtha-cut
Absorption

5 nm

Clear aperture
Laser
wavelength
Face dimensions
toleranceenergy level
Lifetimeof 2F5/2 ytterbium>90%1027 nm+0/-0,1 mm

250 μsLength tolerance
Emissioncross-section @1027 nm
Parallelismindex
error @1064 nm
Refractive±0,1 mm

0,5 × 10-20 cm2<10 arcsec

no = 1,93, ne = 2,1

Perpendicularity
Crystalstructure error
Protective chamfers
Density<10 arcmin

SurfacequalityMohs
hardness
Surface flatness
Thermalconductivity

10-5 S-D

dn/dT
Coatings
Thermal expansion coefficient
Laser
inducedTypicaldopingdamagelevel threshold

AR(R<0,25%)@985
8,41nm
× 10+-6AR(R<0,15%)(IIc) K-1, 15,5 × 10-6 ((IIa) K-1@1000-1070 nm
faces
1,5on
× both10-6 (IIa)K-1, 8,2 × 10-6 (IIc) K-1

Mount

46

Absorption peak wavelength

Tetragonal<0,1 mm at 45˚4,22 g/cm35<λ/10@632,8 nm~5 Wm-1K-1>10 J/cm2@1030
1-3nm,
at.%10 ns
Unmounted

Ma t upreS taainndfe
a rdrosd u c t s

Pro p e r t i e sStrongabsorption bandwidth near 1534 nm corresponding to InGaAsP/
FACE
LENGTHEND FACESORIENTATIONDOPINGDIMENSIONS
InP
laser diode emission
■ 3x3
Wide
near 1600 nm
mmemission bandwidth
5 mm
Brewster-angle
cut
a-cut
1%
■ 3x3
Customupon
requestmm crystals 5available
mm
Right-angle
cut
a-cut
1%

■

5x5 mm5 mm

Brewster-angle cut

A 5x5
p p lmmi c a t i o n e x a5m
p l e s Right-angle cutmm

SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIESCOATINGSSKU
PRICE
Absorption peak wavelength
1534 nm
uncoated Absorption cross-section at peak7846
540
2,4 €× 10-20 cm2

a-cut

1%

AR/AR@985Absorption
nm + 1000-1070
nm at peak7844
bandwidth
uncoated wavelength
7847

590 €
3 nm
540 €

a-cut

1%

AR/AR@985Laser
nm +wavelength
1000-1070 nm

590
€ nm
1609

mm pumped2 mm
Brewster-angle
cut anda-cutmode-locked 3%■ 3x3
In-band“eye-safe”
CW, Q-switchedlasersmm
Right-angle cut■ 3x3
In-bandpumped2 mm“eye-safe”
waveguide lasersa-cut

7845

uncoated Lifetime of 4I13/2 erbium energy7850
level

540
3,1 €ms

3%

AR/AR@985Emission
nm + 1000-1070
nm @1609 nm
7848
cross-section

590
0,4 €× 10-20 cm2

5x5 mm2 mm

Brewster cut

a-cut

3%

uncoated Refractive index

7851

540
ng =€ 2,05, nm = 2,01, np = 1,97

5x5 mm2 mm

Right-angle cut

a-cut

3%

AR/AR@985Crystal
nm + 1000-1070
structure nm

7849

590
€
Monoclinic

4Lasers does not provide standard product list. Please contact us forsolutions and pricing.

Density

6,5 g/cm3

Mohs hardness

4-5

Thermal conductivity~3,5 Wm-1K-1

Typical doping level<20 at. %sales@4Lasers.com

47

CRYSTALS

Er:YAG crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Er3+:YAG crystal is an attractive laser material for eye-safe emission at
wavelengths of 1617 and 1645 nm which can be resonantly diode-pumped
into the upper laser manifold at 1470 nm and 1532 nm. Due to the low
M a i n fe a t u re s
Isotropic crystal (cubic symmetry)■ High thermal conductivity■ Strong absorption bandwidth near 1470 nm corresponding to InGaAsP/
InP laser diode emission■ Emission spectra at 1617 nm is free from absorption in the atmosphere■ Custom crystals available upon request

CW and Q-switched eye-safe (~1,6 µm) in-band pumped lasers with nearly
quantum defect limited efficiency for military applications including LIDAR,
telemetry, or active imaging■ Channel waveguide eye-safe (~1,6 µm) in-band pumped lasers withdiffraction-limited output for long-distance telemetry and ranging■ CW and Q-switched ~3 µm lasers for oral surgery, dentistry, implant dentistry,and otolaryngology■

48960, 1470, 1532 nm

Absorption cross-section at peak wavelength~1,0 × 10-20 cm2@1470 nm

Absorption bandwidth at peak wavelength~2-3 nm @ 1470 nm

Laser wavelength

1617, 1645, 2940 nm

Lifetime of 4I13/2 and I11/2 erbium energy level6,0 ms (4I13/2), 0,1 ms (I11/2)

Emission cross-section at wavelength

2,6 × 10-20@2940 nm
5,2 × 10-21@1645 nm

Refractive index @1064 nm

1,82

Crystal structure

Cubic

Density

4,56 g/cm3

Mohs hardness

8,5

Thermal conductivity~13 Wm-1K-1

dn/dT @1064 nm

7,8 × 10-6 K-1

Thermal expansion coefficient~7 × 10-6 K-1

Typical doping level<1 at.% (for ~1,6 µm lasers)<50 at.% (for ~3 µm lasers)

quantum defect high slope efficiencies of >80% can be achieved with direct
fiber laser or InGaAs/InP pumping. By using heavily erbium doped (~50 at.%)
YAG crystal efficient CW laser operation at ~3 µm can be obtained.
Standard specifications■

Application examples

Absorption peak wavelength

S t a n d a rd p ro d u c t s
ER:YAG CRYSTALS

Orientation[111]

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings

Uncoated, coatings available upon request

Mount

Unmounted

FACE
DIMENSIONS
5 x 5 mm

LENGTHEND FACES

DOPINGCOATINGS

SKU

PRICE

3 mm

Brewster-angle cut

0,15%

Uncoated

7852

Request2 mmBrewster-angle cut

50%

Uncoated

7853

500 €

sales@4Lasers.com

49

CRYSTALS

Er:YLF crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Er3+:YLF crystals are characterized by a low phonon frequency, which
decreases the probability of non-radiative multi-phonon relaxations,
therefore increases the luminescence quantum efficiency. Long lifetime oflaser emitting levels allow higher energy storage, which is useful for the
Q-switch lasing regime. High bandgap along with a low phonon energy

M a i n fe a t u re s
A low phonon frequency■ Long lifetimes of the laser emitting levels■ Wide transparency range (from the VUV to the 10 µm region)■ Negative thermo-optic coefficient■ Custom crystals available upon request

CW and Q-switched ~3 µm lasers for oral surgery, dentistry, implant dentistry,and otolaryngology■ Up-conversion visible lasers for display technology, medicine (diagnosis andtreatment)■

50

972 nmAbsorption coefficient at peak wavelength

28 cm-1

Absorption bandwidth at peak wavelength~1 nm

Laser wavelength2810 nm

Lifetime of 4I11/2 erbium energy level

4 ms

Emission cross-section @2800 nm

1,5 × 10-20 cm2

Refractive index @2070 nm

no = 1,442, ne = 1,464

Crystal structure

tetragonal

Density

3,95 g/cm3

Mohs hardness

5

Thermal conductivity~5 Wm-1K-1

dn/dT-2 × 10-6 (IIa) K-1, -4,1×10-6 (IIc) K-1

Thermal expansion coefficient

8 × 10-6 K-1

Typical doping level

15 at.%

leads to a very wide transparency range, which is possibly from VUV to 10 µm
region. Negative Er3+:YLF thermo-optic coefficient is an advantage since
it reduces the thermal-lensing effect and improves beam shape as well as
stability at high average pump power.

Standard specifications■

Application examples

Absorption peak wavelength

ER:YLF CRYSTALS

S t a n d a rd p ro d u c t s

Orientation

a-cut

FACE DIMENSIONS

SKU

PRICE

Clear aperture

>90%

ø5 mm

5 mm

LENGTHBrewster-angle cut

END FACES

DOPING
15%

Uncoated

COATINGS

7843

540 €

Face dimensions tolerance+0/-0,1 mm

5 x 5 mm

5 mm

Brewster-angle cut

15%

Uncoated

7842

540 €

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings

Uncoated, coatings available upon request

Mount

Unmounted

sales@4Lasers.com

51

CRYSTALS

Er, Yb:phosphate glass

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Er3+,Yb3+ co-doped phosphate glass (Er,Yb:phosphate glass) is a well-known
and commonly used active medium for lasers emitting in the “eye-safe”
spectral range of 1,5-1,6 µm. Phosphate glass combines a long lifetime (~8ms) of 4I13/2 Er3+ upper laser level with a low (2–3 ms) lifetime of 4I11/2Er3+ levelthat is in resonance with Yb3+ 2F5/2 excited state. Fast non-radiative multiM a i n fe a t u re s
Long lifetime of the 4I13/2 erbium energy level■ High Yb to Er energy transfer efficiency■ High absorption and emission cross-sections■ Wide absorption and emission bandwidths■ Custom crystals available upon request

phonon relaxation from 4I11/2 to 4I13/2 level greatly decreases the back-energy
transfer and up-conversion losses due to the interaction between Yb3+ andEr3+ ions, excited at the 2F5/2 and the 4I11/2 levels, respectively.

Standard specifications■

Application examples■

52

Passively Q-switched lasers for laser rangefinders, LIDAR, and LIBS systems

Absorption peak wavelength

970 nmAbsorption cross-section at peak wavelength

1,7 × 10-20 cm2

Absorption bandwidth at peak wavelength

20 nm

Laser wavelength

1534 nm

Lifetime of 4I13/2 erbium energy level

7,9 msEmission cross-section @1534 nm

8 × 10-21 cm2

Yb to Er energy transfer efficiency>90 %Refractive index @1534 nm

1,52

Crystal structure-

Density

2,93 g/cm3

Mohs hardness

6-7

Thermal conductivity

0,85 Wm-1K-1

dn/dT-2,1 × 10-6 K-1

Thermal expansion coefficient

12,4 × 10-6 K-1

Typical doping level

0,3-1,3 × 1020 cm-3 [Er]1,7-4 × 1021 cm-3 [Yb]S t a n d a rd p ro d u c t s

ER, YB:PHOSPHATE GLASS CRYSTALS
Clear aperture>90%

Face dimensions tolerance+0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings

AR(R<0,5%)@940 nm + AR(R<0,2%)@1535 nm on both faces

Laser induced damage threshold>10 J/cm2@1535 nm, 10 ns

Mount

Unmounted

FACE
DIMENSIONSLENGTH
5 mm

3 x 3 mm
10 mm

END FACES

DOPING

Brewster-angle cut

Yb 20%, Er 1%

Right-angle cut

Yb 20%, Er 1%

Brewster-angle cut
Right-angle cut

COATINGS

SKU

PRICE

Uncoated

7824

370 €

AR/AR@940 nm + 1535 nm

7823

395 €

Yb 20%, Er 0,5%

Uncoated

7822

370 €

Yb 20%, Er 0,5%

AR/AR@940 nm + 1535 nm

7821

395 €

sales@4Lasers.com

53

CRYSTALS

Er, Yb:YAB crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Er3+, Yb3+ co-doped yttrium-aluminum borate (Er, Yb:YAB) crystal is analternative to commonly used Er,Yb:phosphate glass as an active medium of“eye-safe” (1,5-1,6 µm) lasers with a high average output power in CW andpulsed modes. It is characterized by high thermal conductivities of 7,7 Wm1 -1
K and 6 Wm-1K-1 along a-axis and c-axis, respectively.

M a i n fe a t u re s
Uniaxial crystal with trigonal structure■ High thermal conductivity■ Wide absorption bandwidth near 976 nm■ High absorption and emission cross-sections■ Extremely high Yb3+ to Er3+ energy transfer efficiency

It also features a highly effective Yb3+ to Er3+ energy transfer (~94%) andweak up conversion losses due to the very short lifetime of 4I11/2 excited state(~80 ns) facilitated by a high maximum phonon energy of the host material(hvmax ~1500 cm-1). A strong and wide (~17 nm) absorption band is observed
at 976 nm that coincides with the emission spectrum of InGaAs laser diodes.

Standard specifications■

Application examples
High power eye-safe (~1,5 µm) CW lasers for metrology■ High-repetition rate passively Q-switched lasers for LIDAR and LIBS systems■ Ultrashort mode-locked lasers for telecom systems■

54

Absorption peak wavelength

976 nmAbsorption cross-section at peak wavelength

2,7 × 10-20 cm2

Absorption bandwidth at peak wavelength

17 nm

Laser wavelength

1522, 1531, 1543, 1550, 1602 nm

Lifetime of 4I13/2 erbium energy level

0,32 ms

Emission cross-section @1531 nm

2,5 × 10-20 cm2

Yb to Er energy transfer efficiency>90 %Refractive index @632.8 nm

no = 1,7757, ne = 1,7015

Crystal structure

trigonal

Density

3,84 g/cm3

Mohs hardness

7,5

Thermal conductivity

7,7 (IIa), 6 (IIc) Wm-1K-1

dn/dT

1,4 × 10-6 (IIa), 4,8 × 10-6 (IIc) K-1

Thermal expansion coefficient

2 × 10-6 (IIa), 9,5 × 10-6 (IIc) K-1

Typical doping level1-2 at.% [Er]8-15 at.% [Yb]S t a n d a rd p ro d u c t s
ER, YB:YAB CRYSTALS

Orientation

c-cut

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,15 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings

AR@(R<1%)@940 nm + AR(R<0,25%)@1480-1600 nm

Laser induced damage threshold>10 J/cm2@1550 nm, 10 ns

Mount

Unmounted

FACE
DIMENSIONSLENGTH
1 mm

3 x 3 mm

2 mm
3 mm

END FACES

DOPING

Brewster-angle cut

12% Yb, 1,5% Er

Right-angle cut

12% Yb, 1,5% Er

Brewster-angle cut

COATINGS

SKU

PRICE

Uncoated

7068

540 €

AR/AR@976 nm + 1480-1600 nm

7065

590 €

12% Yb, 1,5% Er

Uncoated

7069

540 €

Right-angle cut

12% Yb, 1,5% Er

AR/AR@976 nm + 1480-1600 nm

7066

590 €

Brewster-angle cut

12% Yb, 1,5% Er

Uncoated

7070

540 €

Right-angle cut

12% Yb, 1,5% Er

AR/AR@976 nm + 1480-1600 nm

7067

590 €

sales@4Lasers.com

55

CRYSTALS

Tm:YLF crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Tm3+:YLF crystal features high absorption peaks conveniently located for
diode pumping around 792 nm and exhibits a cross-relaxation process, which
creates two ions in the upper laser level for each pump photon absorbed.
Tm3+:YLF lasers are ideal pump sources for Ho3+:YAG lasers. This is due to agood overlap of Tm3+:YLF emission and Ho3+:YAG absorption spectra and

M a i n fe a t u re s
Strong absorption bands for laser diode pumping■ Weak thermal lensing■ High polarization purity■ Custom crystals available upon request

LIDAR systems for remote sensing applications■ Pump source for Ho3+:YAG lasers■

56

792 nmAbsorption cross-section at peak

0,55 × 10-20 cm2

Absorption bandwidth at peak wavelength

16 nm

Laser wavelength

1900 nm

Lifetime of 3F4 thulium energy level

16 ms

Emission cross-section @1900 nm

0,4 × 10-20 cm2

Refractive index @1064 nm

no = 1,448, ne = 1,470

Crystal structure

tetragonal

Density

3,95 g/cm3

Mohs’s hardness

5

Thermal conductivity

6 Wm-1K-1

dn/dT-4,6 × 10-6 (IIc) K-1, -6,6 × 10-6 (IIa) K-1

Thermal expansion coefficient

10,1 × 10-6 (IIc) K-1, 14,3 × 10-6 (IIa) K-1

Typical doping level2-4 at.%capacity of producing linearly polarized output. What is more, the refractive
index of Tm3+:YLF decreases with temperature, leading to a negative thermallens that is partly compensated by a positive lens effect due to end facebulging.

Standard specifications■

Application examples

Absorption peak wavelength

S t a n d a rd p ro d u c t s
TM:YLF CRYSTALS

Orientation

a-cut

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings

AR(R<0,5%)@792 nm + AR(R< 0,5%)@1800-1960 nm on both faces

Laser induced damage threshold>10 J/cm2@1900 nm, 10 ns

Mount

Unmounted

FACE
DIMENSIONSLENGTH3 x 3 mm

8 mm

END FACES

DOPINGCOATINGS

SKU

PRICE

Brewster-angle cut

3%Uncoated

7817

540 €

Right-angle cut

3%

AR/AR@792 nm + 1800-1960 nm

7816

590 €

sales@4Lasers.com

57

CRYSTALS

Tm:KYW crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES

Double tungstate crystals are optically biaxial and their optical properties
have to be described within the frame of optical indicatrix axes (Np, Nm andNg). Advantages of Tm-doped KYW crystals include a broad fluorescenceband, a large emission cross section and a relatively low upper level lifetime.
M a i n fe a t u re s
Broad fluorescence band
■ Large emission cross-section■ Relatively low upper-level lifetime■ Custom crystals available upon request

CW and Q-switched lasers emitting near 2 µm for application in surgery,range finding and environmental monitoring■ 2 µm wavelength region femtosecond lasers■

58

802 nmAbsorption cross-section at peak

5,2 × 10-20 cm2

Absorption bandwidth at peak wavelength

5,5 nmLaser wavelength

1910 nm

Lifetime of 3F4 energy level

1,1 msEmission cross-section @1910 nm

1,15 × 10-20 cm2

Refractive index @1040nm

ng = 2,05, nm = 2,01, np = 1,97

Crystal structure

Monoclinic

Density

6,5 g/cm3

Mohs hardness

4-5

Thermal conductivity~3,3 Wm-1K-1

dn/dT

dnm/dT = -9,2 × 10-6 K-1

Thermal expansion coefficient

αp=1,83 × 10-6 K-1, αm=10,29 × 10-6 K-1,
αg=15,94 × 10-6 K-1

Typical doping level~5 at.%Such properties combination of properties is very promising for generation of
femtosecond pulses in solid-state laser systems.

Standard specifications■

Application examples

Absorption peak wavelength

S t a n d a rd p ro d u c t s
TM:KYW CRYSTALS

Orientation

Ng-cutClear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<10 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/10@632,8 nm

Coatings

AR(R<0,5%)@802 nm + AR(R< 0,5%)@1900-2000 nm on both faces

Laser induced damage threshold>10 J/cm2@1900 nm, 10 ns

Mount

Unmounted

FACE
DIMENSIONS
3 x 3 mm

LENGTH
2 mm

END FACES

DOPINGCOATINGS

SKU

PRICE

Brewster-angle cut

5%Uncoated

7841

RequestRight-angle cut

5%

AR/AR@802 nm +1900-2000 nm

7840

Requestsales@4Lasers.com

59

CRYSTALS

Passive Q-switch crystals

Passive Q-switch crystals (saturable absorbers) are used as laser
resonator quality modulators in passively Q-switched lasers
instead of an electrically controlled modulators. Typically, thesesaturable absorbers are characterized by a low sturation fluence(saturation energy per unit area) and their use with converging
beams can further reduce the saturation energy (saturation
fluence times beam area).

C r : YAG c r y s t a l s

V: YAG c r y s t a l s

Co : S p i n e l c r y s t a l s

4Lasers develops and supplies different passive Q-switch crystal
hosts and ion dopant combinations for research and industrial
applications, therefore custom solutions are available uponrequest.

60

sales@4Lasers.com

61

CRYSTALS

Cr:YAG crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES
Material

4+

Cr :Y3Al5O12

Cr4+:YAG crystals are ideal for passive Q-switch operation of Nd:YAG andother Nd3+ or Yb3+ doped laser crystals in the wavelength range of 900 nm
to 1200 nm. Remarkable feature of Cr4+:YAG is the high damage thresholdM a i n fe a t u re s
Good chemical stability and reliability■ Long lifetime and good thermal conductivity■ Easy to operate■ Custom crystals available upon request
Application examples
Passively Q-switched lasers for laser rangefinders, LIDAR and LIBS systems■ Laser systems where short pulses are required■

σgsa1)@1,064 µm-1946 × 102cm

σesa2)@1,064 µm-198,2 × 10

2

cm

τsa3)

3,4 μsof >10 J/cm2@1064 nm, 10 ns. Its absorption band extends from 900 nm
to 1200 nm and peaks around 1060 nm with a very large absorption crosssection.
Standard specifications■

62

Standard products

CR:YAG CRYSTALSINITIAL
TRANSMISSIONCOATINGS

σgsa/σem4)

20%@1064 nm

AR/AR@1064 nm

7279

195 €

0,946 µm

130

30%@1064 nm

AR/AR@1064 nm

7280

195 €

1,06 µm

17

40%@1064 nm

AR/AR@1064 nm

7281

195 €

50%@1064 nm

AR/AR@1064 nm

7282

195 €

60%@1064 nm

AR/AR@1064 nm

7283

195 €

70%@1064 nm

AR/AR@1064 nm

7284

195 €

80%@1064 nm

AR/AR@1064 nm

7285

195 €

Laser
crystalλlaserNd:YAG
Nd:YAGFACE DIMENSIONS

SKU

PRICE

Nd:GSAG

1,06 µm

55

Nd:YVO4

1,06 µm

3,5

Nd:GdVO4

1,06 µm

5

Nd:LuVO4

1,06 µm

3,4

85%@1064 nm

AR/AR@1064 nm

7286

195 €

Nd:LSB

1,06 µm

40

90%@1064 nm

AR/AR@1064 nm

7287

195 €

Nd:YAP

1,08 µm

14

95%@1064 nm

AR/AR@1064 nm

7288

195 €

Yb:NLM

1,01 µm

500

98%@1064 nm

AR/AR@1064 nm

7289

195 €

Yb:YVO4

1,02 µm

625

20%@1064 nm

AR/AR@1064 nm

7301

225 €

Yb:GGG

1,025 µm

250

30%@1064 nm

AR/AR@1064 nm

7302

225 €

Yb:YAG

1,03 µm

250

40%@1064 nm

AR/AR@1064 nm

7303

225 €

50%@1064 nm

AR/AR@1064 nm

7304

225 €

Yb:LuAG

1,03 µm

185

60%@1064 nm

AR/AR@1064 nm

7305

225 €

Yb:KGW

1,035 µm

185

70%@1064 nm

AR/AR@1064 nm

7306

225 €

80%@1064 nm

AR/AR@1064 nm

7307

225 €

ø3 mm

ø6 mm

Crystal structure

Cubic

85%@1064 nm

AR/AR@1064 nm

7308

225 €

Density

4,56 g/cm3

90%@1064 nm

AR/AR@1064 nm

7309

225 €

Thermal expansion coefficient

6,14 × 10-6 K-1

95%@1064 nm

AR/AR@1064 nm

7310

225 €

Thermal conductivity

11,2 Wm-1K-1

98%@1064 nm

AR/AR@1064 nm

7311

225 €

Initial transmission T0

5-99 %@1064 nm

Mohs hardness

8,2

20%@1064 nm

AR/AR@1064 nm

7290

195 €

Initial transmission T0 tolerance±1% (for values larger than 80 %)Refractive index

1,82@1064 nm

30%@1064 nm

AR/AR@1064 nm

7291

195 €

Clear aperture>90%

40%@1064 nm

AR/AR@1064 nm

7292

195 €

Face dimensions tolerance+0,0/-0,1 mm

50%@1064 nm

AR/AR@1064 nm

7293

195 €

Parallelism error<10 arcsec

60%@1064 nm

AR/AR@1064 nm

7294

195 €

Perpendicularity error<10 arcmin

70%@1064 nm

AR/AR@1064 nm

7295

195 €

Protective chamfers<0,1 mm at 45˚

80%@1064 nm

AR/AR@1064 nm

7296

195 €

Surface quality

10-5 S-D

85%@1064 nm

AR/AR@1064 nm

7297

195 €

Surface flatness<λ/8@632,8 nm

90%@1064 nm

AR/AR@1064 nm

7298

195 €

Wavefront distortion<λ/4@632,8

95%@1064 nm

AR/AR@1064 nm

7299

195 €

Coatings

AR(R<0,15%)@1064 nm on both sides

98%@1064 nm

AR/AR@1064 nm

7300

195 €

Laser induced damage threshold>10 J/cm2@1064 nm, 10 ns

Mount

Unmounted

Herewith:
σgsa1) – ground-state absorption cross-section
σesa2) – excited-state absorption cross-sectionτsa3) – recovery timeσem4) – emission cross-section

3 x 3 mmsales@4Lasers.com

63

CRYSTALS

V:YAG crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES
Material

V3+:Y3Al5O12

V:YAG is a relatively new saturable absorber. Passive Q-switch operation isavailable in the spectral range from 1064 nm to 1440 nm, primarily becauseof an extremely high ground state. These crystals can be used with active
laser media such as Nd:YAG, Nd:YAP, Nd:KGW, Nd:YVO4 and provide goodM a i n fe a t u re s
High ground state absorption
Insignificant excited state absorption■ High contrast of the Q-switch■ Good optical, mechanical, and thermal properties■ UV-resistant and features a high damage threshold■ Custom crystals available upon request

lasing characteristics in passive Q-switched lasers. V:YAG features excellent
optical, mechanical, and thermal properties and can be grown by Czochralski
method.

Standard specifications■■

Application examples■

64

Standard products

Passively Q-switched lasers for laser rangefinders, LIDAR, and LIBS systems

V:YAG CRYSTALS
Initial transmission T0

30-98%@1340 nm

Initial transmission T0 tolerance±1% (for values larger than 80%)

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Parallelism error<20 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/8@632,8 nm

Wavefront distortion<λ/4@632,8

Coatings

AR(R<0,2%)@1310-1360 nm on both sides

Laser induced damage threshold>10 J/cm2@1340 nm, 10 ns

Mount

Unmounted

σgsa1)@1,34 µm

72 × 10-19 cm2

σesa2)@1,34 µm

7,4 × 10-19 cm2

τsa3)

5-37 ns

INITIAL
TRANSMISSIONCOATINGS

SKU

PRICE

σgsa/σem4)

30%@1340 nm

AR/AR@1310-1360 nm

7321

540 €

0,747 µm

10

40%@1340 nm

AR/AR@1310-1360 nm

7322

540 €

Ti:Al2O3

0,78 µm

25

50%@1340 nm

AR/AR@1310-1360 nm

7323

540 €

Cr:LiCAF

0,78 µm

80

60%@1340 nm

AR/AR@1310-1360 nm

7324

540 €

Nd:GGG

0,93 μm-

70%@1340 nm

AR/AR@1310-1360 nm

7325

540 €

80%@1340 nm

AR/AR@1310-1360 nm

7326

540 €

Nd:YLF

1,05 µm

15

85%@1340 nm

AR/AR@1310-1360 nm

7327

540 €

Nd:YAG

1,06 µm

8

90%@1340 nm

AR/AR@1310-1360 nm

7328

540 €

Nd:YVO4

1,06 µm

1,5

95%@1340 nm

AR/AR@1310-1360 nm

7329

540 €

Yb:KYW

1,035 µm

70

30%@1340 nm

AR/AR@1310-1360 nm

7312

540 €

Nd:YAP

1,34 µm

24

40%@1340 nm

AR/AR@1310-1360 nm

7313

540 €

Nd:GdVO4

1,34 µm

30

50%@1340 nm

AR/AR@1310-1360 nm

7314

540 €

60%@1340 nm

AR/AR@1310-1360 nm

7315

540 €

Er:glass

1,54 µm

45

70%@1340 nm

AR/AR@1310-1360 nm

7316

540 €

80%@1340 nm

AR/AR@1310-1360 nm

7317

540 €

Laser
crystalλlaser

Pr:YAPFACEDIMENSIONS

ø5 mm

3 x 3 mmCrystal structure

Cubic

85%@1340 nm

AR/AR@1310-1360 nm

7318

540 €

Density

4,56 g/cm3

90%@1340 nm

AR/AR@1310-1360 nm

7319

540 €

Thermal expansion coefficient

6,14 × 10-6 K-1

95%@1340 nm

AR/AR@1310-1360 nm

7320

540 €

Thermal conductivity

11,2 Wm-1K-1

Mohs hardness

8,2

Refractive index

1,82@1064 nm

Herewith:
σgsa1) – ground-state absorption cross-section
σesa2) – excited-state absorption cross-sectionτsa3) – recovery timeσem4) – emission cross-section

sales@4Lasers.com

65

CRYSTALS

Co:Spinel crystals

Pro p e r t i e s
SPECTROSCOPIC AND THERMO-MECHANICAL PROPERTIES
Material

2+

Co :MgAl2O4

Co:Spinel is a recently developed material, which has been proven to be avery effective passive Q-switch in lasers emitting in the range of 1,2 µm 1,6 µm. Co:Spinel has a high absorption cross-section, which permits
Q-switch operation of Er:glass laser (both flash-lamp and diode-laser
M a i n fe a t u re s
Low optical losses in the wavelength range of 1,3 µm - 1,6 µm■ High laser induced damage threshold■ Custom crystals available upon request

pumped) without an intracavity focusing. Negligible excited-state absorption
results in a high contrast Q-switch operation, the ratio of initial (small signal)
to saturated absorption is higher than 10.

Application examples■

Passive Q-switch for Er:Glass lasers @1,54 µm

σgsa1)@1,54 µm-193,5 × 10cm2

σesa2)@1,54 µm-190,1 × 10

2

cm

τsa3)

220-350 ns

FACE
DIMENSIONSINITIAL
TRANSMISSIONCOATINGS

σgsa/σem4)

70%@1535 nm

AR/AR@1535 nm

7330

440 €

1,34 µm

1,5

80%@1535 nm

AR/AR@1535 nm

7331

440 €

Nd:KGW

1,35 µm

4

85%@1535 nm

AR/AR@1535 nm

7332

440 €

Nd:YAG

1,44 µm

12

90%@1535 nm

AR/AR@1535 nm

7333

440 €

Er:glass

1,54 µm

40

92%@1535 nm

AR/AR@1535 nm

7334

440 €

95%@1535 nm

AR/AR@1535 nm

7335

440 €

Laser
crystalλlaserNd:YAP3 x 3 mm

SKU

PRICE

Crystal structure

Cubic

97%@1535 nm

AR/AR@1535 nm

7336

440 €

Density

3,58 g/cm3

70%@1535 nm

AR/AR@1535 nm

7337

540 €

Thermal expansion coefficient

6,14 × 10-6 K-1

80%@1535 nm

AR/AR@1535 nm

7338

540 €

Thermal conductivity

17 Wm-1K-1

85%@1535 nm

AR/AR@1535 nm

7339

540 €

Mohs hardness

8

90%@1535 nm

AR/AR@1535 nm

7340

540 €

Refractive index

1,6-1,75

92%@1535 nm

AR/AR@1535 nm

7341

540 €

95%@1535 nm

AR/AR@1535 nm

7342

540 €

97%@1535 nm

AR/AR@1535 nm

7343

540 €

Herewith:
σgsa1) – ground-state absorption cross-section
σesa2) – excited-state absorption cross-sectionτsa3) – recovery timeσem4) – emission cross-section

5 x 5 mmStandard specifications■

66

Standard products

CO:SPINEL CRYSTALS
Available initial T0 transmission

50-99 %@1535 nm

Initial transmission T0 tolerance±1% (for values larger than 80%)

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Parallelism error<20 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

20-10 S-D

Surface flatness<λ/8@632,8 nm

Wavefront distortion<λ/4@632,8 nm

Coatings

AR(R<0,15%)@1535 nm

Laser induced damage threshold>8 J/cm2@1535 nm, 10 ns

Mount

Unmounted

sales@4Lasers.com

67

CRYSTALS

Nonlinear crystals

Nonlinear optical crystals are used in many different nonlinear
parametric applications. To mention a few: second harmonic
generation, difference frequency generation, optical parametricamplification and others. A proper crystal has to be chosen
in order to use it for a particular application. It should havetransparency in the required spectral range, adequate
birefringence for phase-matching, a high nonlinear coefficient,high optical damage threshold, and other properties. Contact
4Lasers team for assistance and custom solutions.
4Lasers develops and supplies different nonlinear crystals for
fundamental, applied research and industrial applications.
Available crystal growth techniques: Stepanov,
Kyropoulos, Czochralski (CZ), temperature
gradient technique (TGT), flux method.

BBO crystals

LBO crystals

KTP crystals

K D P, D K D P c r y s t a l s

Lithium niobate crystals

Ag G a S e 2 c r y s t a l s

Ag G a S 2 c r y s t a l s

ZnGeP2 crystals

Cd S e c r y s t a l s

GaSe crystals

68

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69

CRYSTALSBBO crystals

Pro p e r t i e s
PHYSICAL AND OPTICAL PROPERTIES
Chemical formula

β-BaB2O4

Crystal structure

Rhombohedral, 3m

Lattice parameters

a=12,532 Å, c=12,717 Å

Optical symmetry

Negative uniaxial (no>ne)

Density

3,85 g/cm3

Mohs hardness

4-4,5Transparency range

188 nm – 5,2 µm, reasonable from 3 µm to 5,2 µm for thin crystals (few tens of µm)

Sellmeier equations@188 nm - 5,2 µm range (λ in µm)

no2 = 1 + 0,90291 λ2/(λ2 - 0,003926) + 0,83155 λ2/(λ2 - 0,018786) + 0,76536 λ2/(λ2 - 60,01);
ne2 = 1 + 1,151075 λ2/(λ2 - 0,007142) + 0,21803 λ2/(λ2 - 0,02259) + 0,656 λ2/(λ2 - 263)

Refractive indicesno = 1,6551, ne = 1,5426 @1064 nm

Guidance
4Lasers provide guidance and theoretical calculations for particular BBO applications. Contact us and we will help
you to configure your crystal.
BBO crystal transparency ranges from 188 nm to 5,2 µm, which includes
reasonable transparency from 3 µm - 5,2 µm for few tens µm thick crystals,
while their phase-matchable range spans almost over the entire transparency
range. Combined with other magnificent properties of BBO, it is favorable
for numerous nonlinear parametric applications, e.g. harmonic generation

M a i n fe a t u re s
Broad transparency ranges from 188 nm to 5,2 µm (reasonable transparency@3 µm - 5,2 µm for few tens µm thick crystals)■ Broad phase-matchable range for various second order nonlinear interactions
over almost the entire transparency range■ Wide thermal acceptance bandwidth■ Highest nonlinearity of all UV nonlinear crystals■ High laser induced damage threshold■ Ultrathin crystals available for few optical cycle laser pulses■ Custom size, orientation and coatings are available upon requestof pulsed Yb-doped crystal based lasers and frequency doubling, tripling of
Ti:Sapphire lasers, widely tunable type I and II OPO. It is worth to mention thatBBO crystals have the highest nonlinearity in the UV range out of all common
nonlinear crystals.

Harmonic generation (up to fifth) of pulsed Nd-doped crystal based lasers■ Frequency doubling, tripling of pulsed Ti:Sapphire, Yb-doped, dye lasers■ Widely tunable type I and II OPO■ Characterization of ultrashort laser pulses by FROG, XFROG, SPIDER,
dispersion scan, chirp scan methods
■

70

FACE
DIMENSIONSStandard specifications■

Application examples

S t a n d a rd p ro d u c t s

BBO CRYSTALSLENGTH

THETA

PHI

0,1 mm50°

90°

0,15 mm50°

90°

0,3 mm50°

0,05 mm

COATINGSAPPLICATION

SKU

PRICE

P/P@515/257 nm

SHG@515 nm, 50 fs, type I

15808

500 €

P/P@515/257 nm

SHG@515 nm, 100 fs, type I

15809

480 €

90°

P/P@515/257 nm

SHG@515 nm, 200 fs, type I

15810

450 €

29,2°

90°

P/P@400-800 nm

SHG@800 nm, 10 fs, type I

15811

620 €

0,1 mm29,2°

90°

P/P@400-800 nm

SHG@800 nm, 20 fs, type I

6399

450€

0,2 mm29,2°

90°

P/P@400-800 nm

SHG@800 nm, 50 fs, type I

15833

430 €

0,5 mm29,2°

90°

P/P@400-800 nm

SHG@800 nm, 100 fs, type I

6398

390 €

1 mm

29,2°

90°

P/P@400-800 nm

SHG@800 nm, 200 fs, type I

6400

350 €

0,5 mm23,4°90°

AR/AR@515+1030 nm

SHG@1030 nm, 50 fs, type I

9447

440 €

1 mm

23,4°

90°

AR/AR@515+1030 nm

SHG@1030 nm, 100 fs, type I

9448

380 €

1,5 mm23,4°90°

AR/AR@515+1030 nm

SHG@1030 nm, 150 fs, type I

9449

410 €

Orientation accuracy<30 arcmin

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Parallelism error<20 arcsec

Perpendicularity error<5 arcmin

2 mm

23,4°

90°

AR/AR@515+1030 nm

SHG@1030 nm, 200 fs, type I

10733

410 €

Protective chamfers<0,1 mm at 45°

0,01 mm

44,3°

90°

P/P@400-800 nm

THG@800 nm, 10 fs, type I

15834

800 €

Surface quality

10-5 S-D

0,02 mm

44,3°

90°

P/P@400-800 nm

THG@800 nm, 20 fs, type I

15835

780 €

Wavefront distortion<λ/8@632,8 nm

0,05 mm

44,3°

90°

P/P@400-800 nm

THG@800 nm, 50 fs, type I

15836

700 €

Coatings

Low dispersion protective coatings orantireflective coatings on both sides

0,1 mm44,3°

90°

P/P@400-800/266 nm

THG@800 nm, 100 fs, type I

9044

450 €

0,2 mm44,3°

90°

P/P@400-800/266 nm

THG@800 nm, 200 fs, type I

15837

450 €

0,15 mm

32,5°

90°

AR/AR@515+1030/343 nm

THG@1030 nm, 50 fs, type I

9450

630 €

0,25 mm

32,5°

90°

AR/AR@515+1030/343 nm

THG@1030 nm, 100 fs, type I

9451

580 €

0,55 mm

32,5°

90°

AR/AR@515+1030/343 nm

THG@1030 nm, 200 fs, type I

9452

470 €

6 x 6 mm2

Laser induced damage threshold>500 MW/cm @1064 nm, 10 ns

UVFS support

Crystals with <0,1 mm thickness are opticallycontacted to 0,5-1 mm UVFS support

Mount

Mounted in ø25,4 mm black or
natural aluminum mountSupportCrystals thinner than 0,1 mm are optically contacted
onto UVFS support

sales@4Lasers.com

71

CRYSTALS

LBO crystals

Pro p e r t i e s
PHYSICAL AND OPTICAL PROPERTIES
Chemical formula

LiB3O5

Crystal structure

Orthorhombic, mm2

Lattice parameters

a = 8,46 Å, b = 7,38 Å , c = 12,717 Å

Optical symmetry

Negative biaxial (2Vz = 109,2° @0,5321 µm)

Density

2,474 g/cm3

Mohs hardness

6-7

Transparency range

155 nm - 3,2 µm @“0“ transmittance level

Sellmeier equations@T = 293 K (λ in µm)

nX2 = 2,4542 + 0,01125/(λ2 - 0,01135) - 0,01388 λ2;
nY2 = 2,5390 + 0,01277/(λ2 - 0,01189) - 0,01849 λ2 + 4,3025×10-5λ4 - 2,9131×10-5 λ6;nZ2 = 2,5865 + 0,0131/(λ2 - 0,01223) - 0,01862 λ2 + 4,5778×10-5 λ4 - 3,2526×10-5 λ6

Refractive indicesnX = 1,5656; nY = 1,5905; nZ = 1,6055 @1064 nm

Guidance
4Lasers provides guidance and theoretical calculations for particular LBO applications. Contact us and we will help you
to configure your crystal.
Lithium Triborate (LiB3O5, LBO) crystals feature a broad transparency range,
wide acceptance angle, small walk-off angle and the highest damage
threshold among common nonlinear crystals. Most common applications
include high-power near-infrared wavelength second harmonic generation,
sum frequency generation to produce visible, ultraviolet laser light andM a i n fe a t u re s
Broad transparency range from 155 nm to 3200 nm■ Absence of photochromic damage (gray-tracking)■ Highest damage threshold among common nonlinear crystals■ Small walk-off angle at room temperature, no walk-off at NCPM regime■ Wide acceptance angle■ Temperature tunable type I and II non-critical phase-matching■ Super-polished and custom crystals available upon request

visible, near-infrared widely tuned optical parametric oscillators. 4Lasers arecapable of providing uncoated super-polished LBO crystals desired, e.g. for
high-power UV generation via sum-frequency generation of 1064 nm and532 nm.

Standard specifications■

LBO CRYSTALS
Orientation accuracy<30 arcmin

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<20 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45°

Application examples

Surface quality

10-5 S-D

Sum-frequency generation of 532 nm and 1064 nm to produce 355 nm UV
radiation■ Widely tunable OPOs in NIR range pumped by second harmonic of Nd-doped
lasers■ Efficient second harmonic generation at 1064 nm without walk-off effect(NCPM, t = 149 ˚C)Wavefront distortion<λ/4@632,8 nm

Coatings

AR coatings on both sides

Laser induced damage threshold>1 GW/cm2@1064 nm, 10 ns

Mount

Unmounted■

72

S t a n d a rd p ro d u c t s
FACE
DIMENSIONS

3 x 3 mm5 x 5 mm6 x 6 mm

LENGTHTHETA

PHICOATINGS

10 mm

90°

11,6°

AR/AR@532+1064 nm

10 mm

42,2°

90°

AR/AR@532+1064/355 nm

10 mm

90˚

0˚

20 mm

90°

20 mm

APPLICATION

SKU

PRICE

SHG@1064 nm, type I

7203

210 €

THG@1064 nm, type II

7199

230 €

AR/AR@532+1064 nm

NCPM SHG@1064 nm, T = 149 ˚C

7209

210 €

11,6°

AR/AR@532+1064 nm

SHG@1064 nm, type I

7202

360 €

42,2°

90°

AR/AR@532+1064/355 nm

THG@1064 nm, type II

9457

380 €

20 mm

90˚

0˚

AR/AR@532+1064 nm

NCPM SHG@1064 nm, T = 149 ˚C

7210

360 €

10 mm

90°

11,6°

AR/AR@532+1064 nm

SHG@1064 nm, type I

7207

580 €

10 mm

42,2˚

90˚

AR/AR@532+1064/355 nm

THG@1064 nm, type II

7204

610 €

20 mm

90°

11,6°

AR/AR@532+1064 nm

SHG@1064 nm, type I

7208

850 €

20 mm

42,2°

90°

AR/AR@532+1064/355 nm

THG@1064 nm, type II

9459

900 €

1 mm

90°

13,8°

AR/AR@515+1030 nm

SHG@1030 nm, type I

9458

430 €

2 mm

90°

13,8°

AR/AR@515+1030 nm

SHG@1030 nm, type I

9460

400 €

3 mm

90°

13,8°

AR/AR@515+1030 nm

SHG@1030 nm, type I

9461

450 €

4 mm

90°

13,8°

AR/AR@515+1030 nm

SHG@1030 nm, type I

9462

430 €

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73

CRYSTALS

KTP crystals

Pro p e r t i e s
PHYSICAL AND OPTICAL PROPERTIES
Chemical formula

KTiOPO4

Crystal structure

Orthorhombic, mm2

Lattice parameters

a = 12,814 Å, b = 6,404 Å, c = 10,616 Å

Optical symmetry

Positive biaxial (2VZ = 37,4° @0,5461 µm)

Density

2,945 g/cm3

Mohs hardness

5

Transparency range

350 nm - 4,5 µm @”0” transmittance level

Sellmeier equations (λ in µm)

nX2 = 3,0067 + 0,0395/(λ2 - 0,04251) - 0,01247 λ2;
nY2 = 3,0319 + 0,04152/(λ2 - 0,04586) - 0,01337 λ2;nZ2 = 3,3134 + 0,05694/(λ2 - 0,05941) - 0,016713 λ2

Refractive indicesnX = 1,7404; nY = 1,7479; nZ = 1,8296 @1064 nm

Guidance
4Lasers provide guidance and theoretical calculations for particular KTP
applications. Contact us and we will help you to configure your crystal.
Potassium titanyl phosphate (KTiOPO4, KTP) crystals are advantageous dueto their high nonlinearity, great mechanical stability, high optical quality andtransparency range of 350 nm - 4,5 µm. These features determine the wide
application of KTP crystals as a nonlinear medium. It is an excellent solution
for frequency doubling applications of Nd-doped lasers, especially for low
and medium power applications, both intra- and extra-cavity design. Besides,
these crystals can be used as a nonlinear OPO medium for IR generation up
to 4 µm and used as a pump source for mid-IR nonlinear crystal based optical

M a i n fe a t u re s
High nonlinearity■ Nonhygroscopic crystal■ Great mechanical stability■ Wide transparency range from 350 nm to 4,5 µm■ Broad angular and thermal acceptance■ Broad type I and II non-critical phase-matching range

parametric oscillators, such as ZGP OPO. KTP is susceptible to photochromic
damage (grey-tracking), which causes deterioration of nonlinear conversion
efficiency. 4Lasers provide high grey track resistance (HGTR) KTP crystals asa solution, which significantly improves the grey-track resistance and overall
performance. HGTR KTP crystals extend the use of KTP as a nonlinear medium
to high-power applications.

Standard specifications■

Application examples■■

74

Low and medium power frequency doubling of Nd-doped lasers
KTP OPO and ZGP OPO tandem for mid-infrared generation

S t a n d a rd p ro d u c t s
KTP CRYSTALS

Orientation accuracy<30 arcmin

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<20 arcsec

Perpendicularity error<5 arcmin

Protective chamfers<0,1 mm at 45°

Surface quality

10-5 S-D

Wavefront distortion<λ/8@632,8 nm

Coatings

AR(R<0,25%)532+1064 nm on both faces

Laser induced damage threshold>500 MW/cm2@1064 nm, 10 ns

Mount

Unmounted

FACE DIMENSIONS
3 x 3 mm5 x 5 mm
7 x 7 mm

LENGTH

SKU

PRICE

5 mm

90°

THETA

23,5°

PHI

AR/AR@532+1064 nm

COATING

SHG@1064 nm, type II

APPLICATION

7184

75 €

10 mm

90°

23,5°

AR/AR@532+1064 nm

SHG@1064 nm, type II

7188

105 €

5 mm

90°

23,5°

AR/AR@532+1064 nm

SHG@1064 nm, type II

7189

180 €

10 mm

90°

23,5°

AR/AR@532+1064 nm

SHG@1064 nm, type II

7193

290 €

5 mm

90°

23,5°

AR/AR@532+1064 nm

SHG@1064 nm, type II

7194

350 €

10 mm

90°

23,5°

AR/AR@532+1064 nm

SHG@1064 nm, type II

7198

495 €

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75

CRYSTALS

KDP, DKDP crystals

Pro p e r t i e s
PHYSICAL AND OPTICAL PROPERTIES
Chemical formula

KH2PO4 (KDP)

KD2PO4 (DKDP)

Crystal structure

Tetragonal, 42m

Tetragonal, 42m

Lattice parameters

a = 7,448 Å, c = 6,977 Å

a = 7,4697 Å, c = 6,966 Å

Optical symmetry

Negative uniaxial (no > ne)

Negative uniaxial (no > ne)

Density

2,332 g/cm3

2,355 g/cm3

Mohs hardness

2,5

2,5

Transparency range

180 nm - 1,5 µm

200 nm - 2 µm

Refractive indicesno = 1,4938, ne = 1,4599 @1,06 µm

no = 1,4931; ne = 1,4582 @1,06 µm

KDP Sellmeier equations@T = 293 k (λ in µm)

no2 = 2,259276 + 13,00522 λ2/(λ2 - 400) + 0,01008956/(λ2 - (77,26408)-1);
ne2 = 2,132668 + 3,2279924 λ2/(λ2 - 400) + 0,008637494/(λ2 - (81,42631)2)

DKDP Sellmeier equations@T = 293 K (λ in µm)

no2 = 2,240921 + 2,246956 λ2/(λ2 - (11,26591)2) + 0,009676/(λ2 - (0,124981)2);
ne2 = 2,126019 + 0,784404 λ2/(λ2 - (11,10871)2) + 0,008578/(λ2 - (0,109505)2)

Guidance
Potassium dihydrogen phosphate (KH2PO4, KDP) and potassium dideuterium
phosphate (KD2PO4, DKDP) crystals are one of the oldest used nonlinear
materials. DKDP and KDP are known as analogs, though their properties differ
due to DKDP deuteration. They both exhibit excellent ultraviolet transmission
and high damage threshold. The nonlinearity of these crystals is relatively

M a i n fe a t u re s
Excellent ultraviolet radiation transmission■ High laser induced damage threshold■ Custom crystals available upon request

low, these crystals can be grown in large size. They found their application as
nonlinear frequency doublers, triplers and quandruplers of Nd-doped lasers
and as Q-switch devices for Ti:Sapphire, Alexandrite, Nd-doped lasers. Main
drawback is that these crystals are highly hygroscopic, therefore sealed housing
and dry operating conditions have to be ensured.

4Lasers provide guidance and theoretical calculations for particular KDP and DKDP applications.
Contact us and we will help you to configure your crystal.

Standard specifications

S t a n d a rd p ro d u c t s■Application examples
Frequency doublers, triplers and quadruplers for Nd-doped lasers■ Q-switches for Ti:Sapphire, Alexandrite, Nd-doped lasers■

76

FACE DIMENSIONSLENGTHTHETA

COATINGSAPPLICATION

SKU

PRICE

12 x 12 mm

5 mm

76,5°

45°

AR/AR@532/266 nm

SHG@532 nm, type I

9421

360 €

15 x 15 mm

7 mm

76,5°

45°

AR/AR@532/266 nm

SHG@532 nm, type I

9422

415 €

12 x 12 mm

20 mm

53,5°

0°

AR/AR@1064/532+1064 nm

SHG@1064 nm, type II

9426

410 €

12 x 12 mm

20 mm

59,3°

0°

AR/AR@1064/532+1064 nm

THG@1064 nm, type II

9425

410 €

15 x 15 mm

13 mm

36,5°

45°

AR/AR@532+1064 nm

SHG@1064 nm, type I

9423

420 €

15 x 15 mm

13 mm

53,5°

0°

AR/AR@532+1064 nm

SHG@1064 nm, type II

9424

420 €

<0,1 mm at 45°

15 x 15 mm

20 mm

53,5°

0°

AR/AR@1064/532+1064 nm

SHG@1064 nm, type II

9427

515 €

Surface quality

20-10 S-D

15 x 15 mm

20 mm

59,3°

0°

AR/AR@532+1064/355 nm

THG@1064 nm, type II

9428

515 €

Surface flatness<λ/4@632,8 nm

Coatings

AR coatings on both sides

Laser induced damage threshold>10 J/cm2@1064 nm, 10 ns for KDP crystals>5 J/cm2@1064 nm, 10 ns for DKDP

Mount

Unmounted

KDP AND DKDP CRYSTALS
Orientation accuracy<30 arcmin

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<20 arcsec

Perpendicularity error<5 arcmin

Protective chamfers

MATERIAL
KDP

DKDP

PHI

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77CRYSTALS

Lithium niobate crystals

Lithium niobate (LiNbO3, LN) is a multi-purpose material in photonics andoptoelectronics fields. It features a wide transparency range from 420 nm
to 5,2 µm, excellent nonlinear, electro-optic, and piezoelectric properties.
Most common applications include infrared range optical modulation
M a i n fe a t u re s
Broad transparency region from 420 nm to 5200 nm
High nonlinear, electro-optic and acousto-optic coefficients■ Nonhygroscopic, mechanically, and chemically stable

CdSe crystals

and Q-switching, nonlinear frequency conversion of >1 µm wavelengths.
Their electrical and optical properties can be adjusted using magnesium or
zirconium dopants.

Application examples
Electro-optic modulation and Q-switching■ Optical parametric oscillators (OPO) pumped at 1064 nm■ Quasi-phase-matched devices with periodically poled lithium niobate (PPLN)■

4Lasers does not provide standard product list. Please contact us for solutions
and pricing.

78

be pumped by 2 µm Tm-doped, Ho-doped, Tm and Ho co-doped lasers andproduce far infrared idler radiation. Besides nonlinear optic applications
cadmium selenide crystal material can be used for IR optical elements:
substrates, polarizers, waveplates, etc.

Pr o p e r t i e s■■

Cadmium selenide (CdSe) crystals feature an infrared transmission up to
24 µm, reasonably large nonlinearity and small walk-off angle. CdSe crystals
can be employed into difference frequency generation (DFG), opticalparametric oscillation (OPO) schemes to generate infrared laser radiation
above ZGP absorption edge (>12 µm). For instance, CdSe OPO can potentially

PHYSICAL AND OPTICAL PROPERTIES

M a i n fe a t u re s
Wide transparency range (0,7-24 µm)■ Reasonably large nonlinearity■ Small walk-off angle

Pro p e r t i e s■

Chemical formula

LiNbO3

Crystal structure

Trigonal, 3m

Optical symmetry

Negative uniaxial (no>ne)

Density

4,64 g/cm3

Mohs hardness

5

Application examples

Transparency range

420 nm - 5,2 µm■

Sellmeier equations (λ in µm)

no2 = 4,9048 + 0,11768/(λ2 - 0,04750) - 0,027169 λ2;
ne2 = 4,5820 + 0,099169/(λ2 - 0,04443) - 0,021950 λ2

Refractive indicesno = 2,220; ne = 2,146 @1064 nm

Far infrared wavelength radiation generation by DFG, OPO schemes■ Material for infrared optical elements: substrates, polarizers, waveplates, etc.
4Lasers does not provide standard product list. Please contact us forsolutions and pricing.

PHYSICAL AND OPTICAL PROPERTIES
Chemical formula

CdSe

Crystal structure

Hexagonal, 6mm

Lattice parameters

a = 4,2985 Å, c = 7,0150 Å

Optical symmetry

Positive uniaxial (ne >no)Density@288 K

5,81 g/cm3

Mohs hardness

3,25

Transparency range

0,7-24 µm @“0” transmittance level)

Dispersion equations@T = 293 K (λ in µm)

no2 = 4,2243 + 1,7680 λ2/(λ2 - 0,2270) + 3,1200 λ2/(λ2 - 3380);
ne2 = 4,2009 + 1,8875 λ2/(λ2 - 0,2171) + 3,6461 λ2/(λ2 - 3629)

Refractive indicesno = 2,431, ne = 2,452@10,0 µm

Thermal conductivity @T = 293 K

6,9 (||c) Wm-1K-1, 6,2 (⊥c) Wm-1K-1

Laser induced damage threshold

60 MW/cm2@10,6 µm, 200 ns

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79

CRYSTALSAgGaS 2 crystals

Pro p e r t i e s
PHYSICAL AND OPTICAL PROPERTIES

Silver Thiogallate (AgGaS2, AGS) has been demonstrated as an efficient
crystal for nonlinear parametric interactions in the infrared spectral range. Itstransparency region ranges from 0,53 to 12 µm. AGS based optical parametricoscillators feature continuously tunable radiation over a wide range of
wavelengths in the infrared spectral range. High transparency in the shortwavelength range beginning at 550 nm is used in OPOs pumped by Nd:YAG
laser.

Using 2050 nm pump laser, an optimally designed AgGaS2 OPO is tunablefrom about 2.5 to 12.0 µm. The output range can be extended by the sum
or difference frequency mixing (SFM/DFM). This crystal features a high nonlinear coefficient, high damage threshold, and a wide transmission range.
It also exhibits a low optical absorption and scattering, low wavefront
distortion. AgGaS2 has the highest figure of merit for non-linear interactionsin the near and deep infrared.

Chemical formula

AgGaS2Crystal structure

Tetragonal, 42m

Lattice parameters

a = 5,742 Å, c = 10,26 Å

AgGaS 2 crystals

Silver Thiogallate (AgGaS2, AGS) has been demonstrated as an efficient crystal
for nonlinear parametric interactions at infrared spectral range. Its transparency
Optical symmetry
Negative uniaxial (no > ne, λ<0,497 µm ne > no)region is from 0.53 to 12 µm. AGS based optical parametric oscillators featureDensity
4,58 g/cm3
continuously tunable radiation over a wide range of wavelengths in the
Mohs hardness
3-3,5
infrared spectral range. Its high short wavelength transparency beginning at
Transparency range
0,47 - 13 µm @”0“ transmittance level−7 4is used in OPOs
550
Sellmeier equations
no2 = 5,79419 + 0,23114/(λ2 - 0,06882) - 2,4534 × 10−3 λ2 + 3,1814
× 10nmλ - 9,7051 × 10−9 λ6; pumped by Nd:YAG laser. Using 2050 nm pump laser,−7 4@T = 293 K (λ in µm)
ne2 = 5,54120 + 0,22041/(λ2 - 0,09824) - 2,5240 × 10−3 λ2 + 3,6214
λ - 8,3605
× 10−9 λ6 AgGaS OPO is tunable from about 2.5 to 12.0 µm. The
an× 10
optimally
designed2
Refractive indicesno = 2,3471; ne = 2,2914 @ 10,6321 µm
output range can be extended by the sum or difference frequency mixing (SFM/
-1 -1
-1 -1
Thermal conductivity
1,4 (||c) Wm K , 1,5 (⊥c) Wm K
DFM). This crystal has a high non-linear coefficient, high damage threshold, andS t a n d a rd s p e c i f i c a t i o n s
a wide transmission range. It also has low optical absorption and scattering,
Guidance
low wavefront distortion. AgGaS has the highest figure of merit for non-linear
4Lasers provides guidance and theoretical calculations for particular AgGaS2 applications. Contact us and we will help 2
interactions in the near and deep infrared.
you to configure your crystal.
Clear aperture
85%
AgGaS2 is transparent from 0.53 to 12 µm.
+0,0/-0,2 mm

Face dimensions tolerance
Thickness tolerance
Parallelism error±0,2 mmM a i n fe a t u r e s<30 arcsec

Protective chamfers■ <0,2
Uniquenon-linear
properties across the transmission range from 0,5 to 12 µm
mm at
45°

Surface quality■ 60-40
Low opticalabsorption and scattering
S-D

Surface flatness■ <λ/4@632,8
nm
Short wavelengthtransparency

Coatings
Mount

BBAR/BBAR@1,2-2,4 µm/2,4-11 µm

A pUnmounted
plication examples
Frequency mixing in the middle IR region from 4.0 to 18.3 µm
Second harmonic generation and up-conversion for CO2 lasers■ Tunable OPO for solid-state lasers■

M a i n fe a t u re s
Unique non-linear properties across the transmission range from 0,5 to 12 µm■ Low optical absorption and scattering■ Transparency at short wavelengths

Standard specifications■

Application examples
Frequency mixing in the middle IR region from 4,0 to 18,3 µm■ Second harmonic generation and up-conversion for CO lasers
2■ Tunable OPO for solid-state lasers
■

80

■

S t a n d a rd p ro d u c t s
LENGTHTHETA

PHICOATINGSAPPLICATION

SKU

PRICE

Orientation accuracy

AgGaS2 CRYSTALS<30 arcmin

FACE DIMENSIONS
5 x 5 mm

1 mm

39°

45°

BBAR/BBAR@1,2-2,6/2,6-11 μm

DFG@1,2-2,6 μm, type I

7356

RequestClear aperture>80%

8 x 8 mm

1 mm

39°

45°

BBAR/BBAR@1,2-2,6/2,6-11 μm

DFG@1,2-2,6 μm, type I

7395

RequestFace dimensions tolerance+0,0/-0,2 mm

6 x 6 mm

2 mm

50°

0°

BBAR/BBAR@1,2-2,6/2,6-11 μm

DFG@1,2-2,6 μm, type II

7396

RequestParallelism error<30 arcsec

8 x 8 mm

2 mm

50°

0°

BBAR/BBAR@1,2-2,6/2,6-11 μm

DFG@1,2-2,6 μm, type II

7397

RequestPerpendicularity error<10 arcmin

Protective chamfers<0,2 mm at 45°

Surface quality

60-40 S-D

Coatings

BBAR/BBAR@1,2-2,6 µm/2,6-11 µm

Mount

Unmounted

sales@4Lasers.com

81CRYSTALSAgGaSe 2 crystals

Pro p e r t i e s
PHYSICAL AND OPTICAL PROPERTIES
Chemical formula

AgGaSe2

Crystal structure

Tetragonal, 42m

Lattice parameters

a = 5,9920 Å, c = 10,8803 Å

Optical symmetry

Negative uniaxial (no>ne , λ<804 nm, ne>no)Density

5,7 g/cm3

Mohs hardness

3-3,5Transparency range

0,71 - 19 µm @“0“ transmittance level

Sellmeier equations@T=293 K (λ in µm)

no2=6,8507 + 0,4297/( λ2 - 0,1584) - 0,00125 λ2;
ne2 = 6,6792 + 0,4598/(λ2 - 0,2122) - 0,00126 λ2

Refractive indicesno = 2,5917; ne = 2,5585 @10,5 µm

Thermal conductivity @T = 293 K

1 (||c) Wm-1K-1, 1,1 (⊥c) Wm-1K-1

Laser induced damage threshold>10 MW/cm2@10,6 µm, 150 ns

Guidance
4Lasers provides guidance and theoretical calculations for particular AgGaSe2
applications. Contact us and we will help you to configure your crystal.
Silver gallium selenide (AgGaSe2, AGSe) is an optically negative uniaxial
crystal with a reasonable transmittance over roughly 0,7 μm - 18 μm
region. AGSe crystals have proven to be used in nonlinear parametricdownconversion (difference frequency generation, DGF) in the Mid-IR range
by tandem with commercially available synchronously-pumped opticalparametric oscillators (SPOPOs) in the femtosecond and picosecond regime[1]. AGSe crystal has one of the highest figure of merits (~70 pm2/V2) from

M a i n fe a t u re s
Excellent properties across the transmission range from 0,73 to 18 µm
Low optical absorption and scattering■ High FOM (figure of merit) for non-linear interactions in NIR and MIR

commercially available mid-IR nonlinear crystals, which is six times larger
than counterpart AGS. For some particular reasons AGSe is also a better
choice over other mid-IR crystals. For example, even though GaSe has higher
nonlinearity and comparable transparency region, AGSe has lower spatial
walk-off and availability to be processed for particular application (growthand cut direction, dielectric thin-film coatings). ZGP has higher figure of merit,but its transparency region (~2-12 μm) is no match to AGSe.

Standard specifications■■

AgGaSe2 CRYSTALS
Orientation accuracy<30 arcmin

Clear aperture>80%

Face dimensions tolerance+0,0/-0,2 mm

Parallelism error<30 arcsec■

Perpendicularity error<10 arcmin■

Protective chamfers<0,2 mm at 45°

Surface quality

60-40 S-D

Coatings

BBAR/BBAR@1,7-2,7 µm/5-18 µm

Mount

Unmounted

Application examples
Frequency mixing in the IR region from 4,0 to 18,3 µm
Second harmonic generation and up-conversion for CO2 lasers■ Tunable OPO for solid-state lasers with efficiency up to 10%82

S t a n d a rd p ro d u c t s
FACE DIMENSIONS
5 x 5 mm

LENGTHTHETA

PHICOATINGSAPPLICATION

SKU

PRICE

2 mm

52°

45°

BBAR@1,7-2,7 μm/BBAR@5-18 μm

Ultrashort pulse DFG@1,7-2,7 μm -> ~5-18 μm, type I

15806

Request

5 mm

52°

45°

BBAR@1,7-2,7 μm/BBAR@5-18 μm

Ultrashort pulse DFG@1,7-2,7 μm -> ~5-18 μm, type I

15807

Request

10 mm

52°

45°

BBAR@1,7-2,7 μm/BBAR@5-18 μm

Ultrashort pulse DFG@1,7-2,7 μm -> ~5-18 μm, type I

15805

Requestsales@4Lasers.com

83

CRYSTALS

ZnGeP 2 crystals

Zinc-germanium diphosphide (ZnGeP2, ZGP) crystals are considered as stateof-the-art mid-IR nonlinear crystals due to unique properties. They exhibit
an excellent nonlinearity and thermal conductivity (36 W/mK@||c, 35 W/
mK@⊥c) together with a relatively high laser induced damage threshold.
M a i n fe a t u re s
Useful transmission range from 2 µm to 12 µm■ High nonlinearity■ Relatively high damage threshold■ Nominal absorption coefficient <0,04 cm-1 at ~2,1 µm for o-wave

CdSe crystals
Pro p e r t i e s

PHYSICAL AND OPTICAL PROPERTIESZGP crystal can be successfully implemented in high-power mid-IR harmonic
generators, difference frequency generators and optical parametric oscillators
due its broad useful transmission range (2-12 µm).

Standard specifications■

Application examples
Harmonic generation of CO2 and CO laser fundamental wavelength■ Generation of continuously tunable radiation in MWIR, LWIR range by OPO
and DFG techniques■ Generation of terahertz range frequencies■

84

ZnGeP2 CRYSTALS

Chemical formula

ZnGeP2Crystal structure

Tetragonal, 42m

Lattice parameters

a = 5,465 Å, c = 10,708 Å

Optical symmetry

Positive uniaxial (ne >no)Density

4,162 g/cm3

Mohs hardness

5,5Transparency range

0,74 - 12 µm @“0“ transmittance level

Dispersion equations @1,5 - 10,59 µm
range, T = 293 K (λ in µm)

no2 = 11,6413 + 0,69363/(λ2 - 0,21967) + 1586,06/(λ2 - 832,75);
ne2 = 12,1438 + 0,75255/(λ2 - 0,21913) + 2061,68/(λ2 - 951,07)

Refractive indicesno = 3,0738; ne = 3,1137 @10,5 µm

Thermal conductivity @T = 293 K

36 (||c) Wm-1K-1, 35 (⊥c) Wm-1K-1

Laser induced damage threshold

60 MW/cm2@10,6 µm, 100 ns

Guidance
4Lasers provides guidance and theoretical calculations for particular ZnGeP2
Cadmium selenide (CdSe) crystals feature infrared transmission up to 24 µm,
applications. Contact us and we will help you to configure your crystal.
reasonably large nonlinearity and small walk-off angle. CdSe crystals can be
employed into difference frequency generation (DFG), optical parametricoscillation (OPO) schemes to provide infrared laser radiation above ZGP
absorption edge (>12 µm). For instance, CdSe OPO potentially can be
S t a n d a rd p ro d u c t s
M a i n fe a t u re s
FACE DIMENSIONSLENGTH

THETA

PHI

Wide transparency range (0,7 µm - 24 µm)
10 mm
55,3°
0°
■ Reasonably large nonlinearity
5 x 5 mm
15 mm
55,3°
0°
■ Small walk-off angle
20 mm
55,3°
0°

■

Orientation accuracy<30 arcmin

Clear aperture>80%

Face dimensions tolerance+0,0/-0,2 mm

Length tolerance+1,0/-0,0 mm

Parallelism error<30 arcsec

Application examples

Perpendicularity error<10 arcmin■

Protective chamfers<0,2 mm at 45°

Surface quality

60-40 S-D

Surface flatness

λ/4@632,8 nm

Coatings

Antireflective coatings @2,1 μm + 3,5-5 μm on bothsides

Nominal absorption coefficient≤0,04 cm-1@2,1 μm, o-wave

Mount

Unmounted

COATINGS
AR@2,1 μm + BBAR@3,5-5 μm
AR@2,1 μm + BBAR@3,5-5 μm
AR@2,1 μm + BBAR@3,5-5 μm

Long-infrared wavelength infrared radiation generation by DFG, OPO
schemes■ Material for infrared optical elements: substrates, polarizers, waveplates, etc.
4Lasers does not provide standard product list. Please contact us forsolutions and pricing.

pumped by 2 µm Tm-doped, Ho-doped, Tm and Ho-codoped lasers andproduce long infrared idler radiation. Besides nonlinear optics applications
cadmium selenide crystal material can be used for IR optical elements:
substrates, polarizers, waveplates, etc.

Pro p e r t i e s

APPLICATIONSKUAND OPTICAL PROPERTIESMWIR generation, typePHYSICAL
I, eeo interaction
15358
MWIRformula
generation, type I, eeo interaction
15359
Chemical
CdSe
MWIR
generation, type I, eeo interaction
Crystalstructure
Hexagonal, 6mm15360

PRICE
RequestRequestRequestLattice parameters

a = 4,2985 Å, c = 7,0150 Å

Optical symmetry

Positive uniaxial (ne >no)Density@288 K

5,81 g/cm3

Mohs hardness

3,25

Transparency range

0,7-24 µm @“0” transmittance level)

Dispersion equations@T = 293 K (λ in µm)

no2 = 4,2243 + 1,7680 λ2/(λ2 - 0,2270) + 3,1200 λ2/(λ2 - 3380);
ne2 = 4,2009 + 1,8875 λ2/(λ2 - 0,2171) + 3,6461 λ2/(λ2 - 3629)

Refractive indicesno = 2,431, ne = 2,452@10,0 µm

Thermal conductivity @T = 293 K

6,9 (||c) Wm-1K-1, 6,2 (⊥c) Wm-1K-1

Laser induced damage threshold

60 MW/cm2@10,6 µm, 200 ns

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85

CRYSTALS

GaSe crystals

CdSe crystals
Pro p e r t i e s

PHYSICAL AND OPTICAL PROPERTIES
Chemical formula

GaSe

Crystal structure

Hexagonal, -62m

Lattice parametersA = 3,742 Å, c = 15,918 Å

Optical symmetry

Negative uniaxial (no>ne)

Density

5,03 g/cm3

Mohs hardness≈0

Transparency range

0,62-20 μm @ “0” transmittance level

Sellmeir equations

no2 = 7,443 + 0,4050/λ2 + 0,0186/λ4 + 0,0061/λ6 +3,1485 λ2/(λ2 - 2194);
ne2 = 5,76 + 0,3879/λ2 - 0,2288/λ4 + 0,1223/λ6 + 1,8550
λ2/(λ2 - 1780)

Refractive indicesno = 2,8158; ne = 2,4392 @10,6 μm

Guidance
4Lasers provides guidance and theoretical calculations for particular GaSe
applications. Contact us and we will help you to configure your crystal.
4Lasers offer z-cut, cleaved surface and mounted gallium selenide (GaSe)
crystals. Custom clear apertures and crystal thicknesses from tens of microns

M a i n fe a t u re s
Broad transparency range from 0,65 μm to 18 μm■ Large nonlinearity and birefringence■ Soft and cleaves along [001] plane■ Cannot be cut and polished at certain angles■ Comes uncoated and mounted for proper handlingup to several millimeters are available upon request. Due to fragile nature of
GaSe it is not possible to apply antireflection coatings.

Standard specifications■

Application examples
Broadband mid-IR difference frequency generation■ Second harmonic (SH) of CO , CO, dye lasers
2■ Terahertz (THz) generation by optical rectification■ Terahertz detectors for terahertz time domain spectroscopy (THz-TDS)■

GaSe CRYSTALS

Cadmium selenide (CdSe) crystals feature infrared transmission up to 24 µm,
reasonably large nonlinearity and small walk-off angle. CdSe crystals can be
employed into difference frequency generation (DFG), optical parametricoscillation (OPO) schemes to provide infrared laser radiation above ZGP
edge
S t aabsorptionn d a rd p rod u c(>12t s µm). For instance, CdSe OPO potentially can be
CLEAR APERTURE

LENGTHORIENTATIONCOATINGS

SKU

PRICE

Clear aperture

ø5 mm or custom

M a i n fe a t u re s

0,5 mmz-cut

Uncoated

13185

1000 €

Surface quality

Cleaved surfaces

Uncoated

11982

1125 €

Coatings

Uncoated, unavailable

mm transparency1range
mm (0,7 µmz-cut
■ ø5
Wide
- 24 µm)

Uncoated

13183

1250 €

Mount

ø25,4 mm black anodized aluminum mount

2 mm
Reasonably large nonlinearity■ Small walk-off angle
■

z-cut

Application examples
Long-infrared wavelength infrared radiation generation by DFG, OPO
schemes■ Material for infrared optical elements: substrates, polarizers, waveplates, etc.
■

4Lasers does not provide standard product list. Please contact us forsolutions and pricing.

86

pumped by 2 µm Tm-doped, Ho-doped, Tm and Ho-codoped lasers andproduce long infrared idler radiation. Besides nonlinear optics applications
cadmium selenide crystal material can be used for IR optical elements:
substrates, polarizers, waveplates, etc.

Pro p e r t i e s
PHYSICAL AND OPTICAL PROPERTIES
Chemical formula

CdSe

Crystal structure

Hexagonal, 6mm

Lattice parameters

a = 4,2985 Å, c = 7,0150 Å

Optical symmetry

Positive uniaxial (ne >no)Density@288 K

5,81 g/cm3

Mohs hardness

3,25

Transparency range

0,7-24 µm @“0” transmittance level)

Dispersion equations@T = 293 K (λ in µm)

no2 = 4,2243 + 1,7680 λ2/(λ2 - 0,2270) + 3,1200 λ2/(λ2 - 3380);
ne2 = 4,2009 + 1,8875 λ2/(λ2 - 0,2171) + 3,6461 λ2/(λ2 - 3629)

Refractive indicesno = 2,431, ne = 2,452@10,0 µm

Thermal conductivity @T = 293 K

6,9 (||c) Wm-1K-1, 6,2 (⊥c) Wm-1K-1

Laser induced damage threshold

60 MW/cm2@10,6 µm, 200 ns

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87CRYSTALS

Raman
crystals
Nonlinear
crystalsInelastic photon-phonon-interaction in Raman crystals gives riseto Stokes or anti-Stokes shift of pump radiation. It is the so-called
Stimulated Raman scattering (SRS). This is a versatile method for
Donatas Rimkus
frequency conversion, which does not need to be phase-matched,features a high conversion efficiency and is easily compatible withcurrent solid-state lasers. Suchlike Raman generator emission lines
can cover the wavelength range from UV to NIR due to cascaded
SRS. For a selective Raman shift line amplification, the Raman
crystal has to be placed into a resonator with an appropriate
optical feedback.

Barium nitrate crystals

KG W c r y s t a l s

KY W cr ystals

4Lasers provide barium nitrate and undoped KGW, KYW Raman
crystals. Do not hesitate to request custom, if
desired crystals are not present in thestandard list.

88

sales@4Lasers.com

89

CRYSTALS

Barium nitrate crystals

Pro p e r t i e s
PHYSICAL AND OPTICAL PROPERTIES

Barium nitrate (Ba(NO3)2) is one of the leading crystals among solid-state
Raman shifters in terms of Raman gain coefficient, which is known to be
the highest at nanosecond steady-state regime (gR = 47 cm/GW@532 nmpump). Barium nitrate also features a moderately broad transparency range(0,33 μm - 1,8 μm) and high damage threshold. Drawbacks of barium nitrate

M a i n fe a t u re s
Transparency range from 350 nm to 1800 nm■ Raman frequency shift of 1048 cm-1
■ Excellent Raman shifter for nanosecond applications■ Custom crystal dimensions and coatings available upon request

External cavity Raman laser pumped by commercially available passively
Q-switched nanosecond Nd:YAG laser■ Generation of 1,59 µm “eye-safe” radiation, which coincides with CO
2absorption line■

90

Ba(NO3)2

Crystal structure

Cubic, P213

Lattice parametersa = b = c = 8,11 Å

Density

3,25 g/cm3

Mohs hardness

2,5-3

Transparency range

0,33 µm - 1,8 µm

Refractive index

1,555@1064 nm

Thermal conductivity

1,17 Wm-1K-1@||cThermal expansion coefficient

13×10-6 1 oC-1

dn/dT

-20×10-6K-1

Raman frequency shift

1047 cm-1

Raman linewidth

0,4 cm-1

Raman gain (ns, steady-state regime)

47 cm/GW@532 nm
11 cm/GW@1064 nm

Dephasing time

28 pscrystal are low thermal conductivity (1,17 Wm-1K-1) and high electro-optic
coefficient (dn/dT = -20 × 10-6K-1), which lead to the thermal lensing effect.
The crystal is soft and hygroscopic, therefore should be treated with caution.
4Lasers recommend using barium nitrate as a Raman shifter for nanosecond
applications.

Standard specifications■

Application examples

Chemical formula

S t a n d a rd p ro d u c t s

BARIUM NITRATE CRYSTALS
Orientation[111]

Clear aperture>90%

Face dimensions tolerance+0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<2 arcmin

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

40-20 S-D

Surface flatness<λ/6@632,8 nm

Wavefront distortion<λ/4@632,8 nm

Coatings

AR(R<0,5%)@500-700 nm

Laser induced damage threshold>10 J/cm2@1064 nm, 10 ns

Mount

Unmounted

FACE DIMENSIONS
5 x 5 mm
8 x 8 mm

COATINGS

SKU

PRICE

15 mm

LENGTH

AR/AR@500-700 nm

7269

630 €

30 mm

AR/AR@500-700 nm

7270

760 €

45 mm

AR/AR@500-700 nm

7271

900 €

75 mm

AR/AR@500-700 nm

7272

1010 €

Minimum order quantity: 2 pieces.

sales@4Lasers.com

91

CRYSTALS

KGW crystals

Pro p e r t i e s
PHYSICAL AND OPTICAL PROPERTIES

Potassium gadolinium tungstate (KGd(WO4)2, KGW) crystals feature goodmechanical properties, relatively good thermal conductivity(2,5-3,4 Wm-1K-1) and wide transparency range, which spans from 350 nm
to 5 µm. KGW as a Raman crystal features two large Raman modes at
M a i n fe a t u re s
Broad transparency range from 300 nm to 5 µm
■ Two pump polarization-dependent Raman shifts at 768 cm-1 and 901 cm-1
■ Excellent Raman shifter for picosecond applications■ Custom dimensions, orientation, and coatings available upon request

768 cm-1 and 901 cm-1, which are pump polarization dependent. 4Lasers
recommend using KGW crystal as a Raman shifter for picosecond
applications.

Standard specifications■

Application examples■

92

Raman generator pumped by commercially available picosecond Nd:YAG
laser

Chemical formula

KGd(WO4)2

Crystal structure

Monoclinic, C2c

Lattice parameters

a = 10,652(4) Å, b = 10,374(6) Å, c = 7,582(2) ÅDensity

7,27 g/cm3

Mohs hardness

4-5

Transparency range

0,3 µm - 5 µm

Refractive indices@1064 nm

np = 1,982
nm = 2,010
ng = 2,061

Thermal conductivity

Ka = 2,6 Wm-1K-1
Kb = 3,8 Wm-1K-1
Kc = 3,4 Wm-1K-1

dn/dT

dnp/dT = -15,7×10-6K-1
dnm/dT = -11,8×10-6K-1
dng/dT = -17,3×10-6K-1

Raman frequency shift

901 cm-1 (p[mm]p),
767 cm-1 (p[gg]p)

Raman linewidth

5,4 cm-1@901 cm-1 (p[mm]p)6,4 cm-1@767 cm-1 (p[gg]p)

Raman gain
(ps, transient-state regime)

11 cm/GW@532 nm
3 cm/GW@1064 nm

Dephasing time

2 ps

S t a n d a rd p ro d u c t s
KGW CRYSTALS

Orientation

b-cut

Clear aperture>90%

Face dimensions tolerance+0,0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<20 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/8@632,8 nm

Wavefront distortion<λ/4@632,8 nm

Coatings

AR(R<0,7%)@500-650 nm

Laser induced damage threshold>10 J/cm2@1064 nm, 10 ns

Mount

Unmounted

FACE
DIMENSIONSLENGTH
15 mm

5 x 5 mm

30 mm
45 mm

COATINGS

SKU

PRICE

Uncoated

7259

390 €

AR/AR@450-800 nm

7262

540 €

Uncoated

7260

490 €

AR/AR@450-800 nm

7263

640 €

Uncoated

7261

680 €

AR/AR@450-800 nm

7264

830 €

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93

CRYSTALSKYW crystals

Pro p e r t i e s
PHYSICAL AND OPTICAL PROPERTIES

Potassium yttrium tungstate (KY(WO4)2, KYW) crystals offer two strong
phonon modes around 765 cm-1 and 905 cm-1, which have similar Ramangain and are pump polarization dependent. KYW crystals possess goodmechanical properties, high optical damage threshold, broad transparency
M a i n fe a t u re s
Broad transparency range from 350 nm to 5,5 µm■ Two large Raman shifts of 765 cm-1 and 905 cm-1

range (350 nm - 5,5 µm) and thermal conductivity around three times higher
than barium nitrate.

Standard specifications■

Application examples
Raman lasers■ Radiation frequency tuning■

94

Chemical formula

KY(WO4)2

Crystal structure

Monoclinic, C2/c

Lattice parameters

a = 10,64 Å, b = 10,32 Å, c = 7,55 Å

Density

6,61 g/cm3

Mohs hardness

4-5

Transparency range

0,35-5,5 µm

Refractive indices(1064 nm, room temperature)np = 1,9688
nm = 2,0065
ng = 2,0507

Thermal conductivity (average value)

3,3 Wm-1K-1

dn/dT

dnp/dT = -14,6×10-6 K-1
dnm/dT = -8,9×10-6 K-1
dng/dT = -12,4×10-6 K-1

Raman frequency shift (T = 300 K)

905 cm-1 (E||Nm)765 cm-1 (E||Ng)

Raman gain (1064 nm pump, steadystate regime)

3,6 cm/GW

S t a n d a rd p ro d u c t s
KYW CRYSTALS

Orientation

b-cut

Clear aperture>90%

Face dimensions tolerance+0/-0,1 mm

Length tolerance±0,1 mm

Parallelism error<20 arcsec

Perpendicularity error<10 arcmin

Protective chamfers<0,1 mm at 45˚Surface quality

10-5 S-D

Surface flatness<λ/8@632,8 nm

Wavefront distortion<λ/4@632,8 nm

Coatings		

AR(R<0,7%)@500-650 nm

Laser induced damage threshold>10 J/cm2@1064 nm, 10 ns

Mount

Unmounted

FACE
DIMENSIONSLENGTH
15 mm

5 x 5 mm

30 mm
45 mm

COATINGS

SKU

PRICE

Uncoated

7273

390 €

AR/AR@450-800 nm

7276

540 €

Uncoated

7274

490 €

AR/AR@450-800 nm

7277

640 €

Uncoated

7275

680 €

AR/AR@450-800 nm

7278

830 €

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95

CRYSTALS

Photorefractive
crystals
Nonlinear crystals

4Lasers provide
Fe:LiNbO3,
SBN
and BGO
crystals
Nonlinear
opticalBSO,
crystals
are usedin manydifferent
notmainly,but
necessarily
forapplications,which
exploitnonlinear parametric applications. To mention a few,
secondphotorefractive
effect.
Photorefractive
effectisaphenomenon
harmonic generation, difference frequency generation, opticalDonatas Rimkus
whereby the
local index ofrefraction
modifiedby spatial
parametricamplification
andother. A isproper
crystalhas tovariations
It isaobserved
coherentbechosen ofin light
orderintensity.
to use it forparticularwhen
application.
It light
interferes
with
each
other
in
photorefractive
material,
whichshould have: transparency in the required spectral range,
forms a spatiallyvaryingfor
patternof illumination.
Thenonlinear
effect canadequatebirefringencephase-matching,a high
be
used
to
store
temporary,erasableholograms,
also
coefficient, high optical damage threshold, and other known asholographicContact
data storage.
can also
be used toandcreatephaseproperties.
4LasersItteam
for assistancecustomconjugate
mirrorsor
opticalspatialsolitons.
solutions.
4Lasers develops and supplies different nonlinear crystals for
fundamental, applied research and industrial applications.
Available crystal growth techniques: Stepanov, Kyropoulos,
Czochralski (CZ), temperature gradient technique (TGT), flux
method.

96

BSO crystals

Fe : L i N b O 3 c r y s t a l s

SBN crystals

BGO crystals

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97

CRYSTALS

BSO crystals

Pro p e r t i e s
MAIN PROPERTIES

Bismuth silicone oxide (Bi12SiO20, BSO) crystals are highly efficientphotoconductors with a low dark conductivity, that allows a build-up of large
photo-induced space-charges. Tremendous photoconductivity and electrooptic properties make BSO crystals attractive in a range of applications:M a i n fe a t u re s
High electro-optic coefficient (r41 = 5 pm/V)■ High phase-conjugation efficiency■ Available in large size elements or wafers up to 3“■ Customization available upon request

Spatial light modulators■ Optical switches■ Pockels readout optical memory (PROM) applications■ Optical waveguides■

98

Bi12SiO20

Crystal structure

Cubic, point group 23

Lattice parameters

10,10 ÅDensity

9,2 g/cm3

Mohs hardness

5

Transmission Range

0,45-6 µm

Refractive Index

2,54@0,63 µm

Optical Activity

42 deg/mm@500 nm

Electro-optic coefficient

r41 = 5 pm/V

Dielectric constant (low frequency)

56

Dark resistance

1014 Ohm cm

spatial light modulators, optical switches, phase conjugation mixers. BSO
crystals are grown by modified Czochralski method and available in up to 3‘‘diameter aperture size.
Crystals can be supplied with ITO coatings on request.
Standard specifications■

Application examples

Chemical formula

S t a n d a rd p ro d u c t s
BSO CRYSTALS

Clear aperture

85%

Face dimensions tolerance+0/-0,2 mm

Thickness tolerance±0,2 mm

Parallelism error<30 arcsec

Protective chamfers<0,3 mm at 45°

Surface quality

40-20 S-D

Wavefront distortion<λ/4@632,8 nm

Coatings

Uncoated

Mount

Unmounted

FACE DIMENSIONS
5 x 5 mm
10 x 10 mm
20 x 20 mm
30 x 30 mm

LENGTHORIENTATION

SKU

PRICE

5 mm

[100]

6885

520 €

5 mm

[110]

6884

520 €

5 mm

[100]

6883

680 €

5 mm

[110]

6882

680 €

1,0 mm

[100]

6881

490 €

1,0 mm

[110]

6880

490 €

1,0 mm

[110]

1558

590 €

1,5 mm

[110]

9095

590 €

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99

CRYSTALS

Fe:LiNbO 3 crystals

Pro p e r t i e s
MAIN PROPERTIES

Lithium niobate (LiNbO3, LN) crystal doped with iron (Fe:LiNbO3) is an
attractive photorefractive material, due to the high photorefractive
sensitivity, high electro-optic coefficients and diffraction efficiency, chemomechanical properties. Fe:LiNbO3 crystals are grown by Czochralsky method
M a i n fe a t u re s
High electro-optic coefficient (r41 = 5 pm/V)■ High phase conjugation efficiency■ Available in large size elements or wafers up to 3”■ Customization available upon request

Spatial light modulators■ Optical switches■ Holographic recording■ Optical waveguides■

100

Fe:LiNbO3

Crystal structure

Trigonal, 3m

Density

4,64 g/cm3

Mohs hardness

5

Transmission range

0,35-5,5 µm

Refractive index @0.63 µm

ne = 2,20
no = 2,29

Electro-optic coefficients

r22 = 6,8 pm/V
r31 = 10 pm/V
r33 = 32 pm/V

Dielectric constante11 = 85e33 = 30

and available in large size. Wide range of available dopants and levels enable
to adjust material properties for particular applications. What is more,
Fe:LiNbO3 crystals are easy to handle, low cost, therefore suitable for volume
production.
Standard specifications■

Application examples

Chemical formula

S t a n d a rd p ro d u c t s
FE:LINBO3 CRYSTALS

Dopant level, Fe2O3

0,02 mol. %0,03 mol. %0,05 mol. %0,1 mol. %Orientation

90° cut (X-cut, Y-cut)

Clear aperture

85%

Face dimensions tolerance+0/-0,2 mm

Thickness tolerance±0,2 mm

Parallelism error<3 arcmin

Protective chamfers<0,3 mm at 45°

Surface quality

20-10 S-D

Wavefront distortion<λ/4@632,8 nm

Coatings

None, antireflective or indium tin oxide coatings
available upon request

Electrodes

None, available upon request

Mount

Unmounted

FACE
DIMENSIONSLENGTH

1 mm
10 x 10 mm
5 mm

20 x 20 mm

1 mm

DOPING

SKU

PRICE

0,02 % Fe2O3

7006

420 €

0,03 % Fe2O3

7007

420 €

0,05 % Fe2O3

7008

420 €

0,1 % Fe2O3

7009

420 €

0,02 % Fe2O3

6457

Request0,03 % Fe2O3

6458

Request0,05 % Fe2O3

4052

Request0,1 % Fe2O3

7005

Request0,02 % Fe2O3

7010

Request0,03 % Fe2O3

7011

Request0,05 % Fe2O3

7012

Request0,1 % Fe2O3

7013

Requestsales@4Lasers.com

101

CRYSTALS

SBN crystals

Pro p e r t i e s
MAIN PROPERTIES

Strontium-barium niobate (SrxBa(1-x)Nb2O6, SBN:x, x = 61) crystals featureexcellent optical and photorefractive properties. They are available nominallypure or doped with Ce. Different composition SBN crystals found theirapplication in electro-optics, acousto-optics, photorefractive, non-linear
M a i n fe a t u re s
Pure or doped with Ce■ Efficient phase-conjugation■ Custom size, doping level, unpoled, antireflective coated and electrodelesscrystals are available upon request.

optics fields. 4Lasers provide inclusion-free and homogenous SBN crystals,
which are grown by Modified Stepanov method and available with linear
dimensions up to 40 mm.

Standard specifications■

Application examples
Optical information recording■ Pyroelectrical detectors■ Self-pumped self-conjugation mirror■ Optical correlators■

Composition

SBN:61

Crystal structure

Tetragonal, 4 mm

Lattice parameters

a = 12,46 Å, c = 3,946 Å

Density

5,4 g/cm3

Mohs hardness

5,5Melting temperature

1480°C

Curie temperature

75°C

Transparency range

0,45-5,5 µm

Refractive index @633 nm

no = 2,3103
ne = 2,2817

Δn @633 nm-0,0286

Half-wave voltage (λ/2)

240 VDielectric constant,(T = 293 K)

900Electro-optic coefficients

r13 = 45 pm/V
r33 = 250 pm/V

Pyroelectric coefficient

0,065 μC cm-2 K-1Dielectric constant880

S t a n d a rd p ro d u c t s
SBN:61 CRYSTALS

Orientation

Short edge along tetragonal axis

PolingPoled or unpoled

Electrodes

Carbon-water electrodes or no electrodes

Clear aperture

85%

Face dimensions tolerance+0/-0,2 mm

Thickness tolerance±0,2 mm

Parallelism error<30 arcsec

Protective chamfers<0,1 mm at 45°

Surface quality

20-10 S-D over clear aperture,
60-40 S-D other surfaces

Surface flatness<λ/4@632,8 nm

Coatings

Uncoated

Mount

Unmounted

MATERIALFACEDIMENSIONSLENGTH5 mm

10 mm
SBN:615 x 5 mm
15 mm

20 mm

102

DOPINGSKU

PRICE

Undoped73

1650 €

CeO2 0,002 wt, %6940

1650 €

CeO2 0,01 wt, %6944

1650 €

CeO2 0,1 wt, %6948

1650 €

Undoped74

2050 €

CeO2 0,002 wt, %6941

2050 €

CeO2 0,01 wt, %6945

2050 €

CeO2 0,1 wt, %6949

2050 €

Undoped75

2550 €

CeO2 0,002 wt, %6942

2550 €

CeO2 0,01 wt, %6946

2550 €

CeO2 0,1 wt, %6950

2550 €

Undoped76

3200 €

CeO2 0,002 wt, %6943

3200 €

CeO2 0,01 wt, %6947

3200 €

CeO2 0,1 wt, %6951

3200 €

sales@4Lasers.com

103

CRYSTALSBGO crystals

Pro p e r t i e s
MAIN PROPERTIES

Bismuth germanite (Bi12GeO20, BGO) crystals are highly efficientphotoconductors with a low dark conductivity, that allows a build-up of large
photo-induced space-charges. Tremendous photoconductivity and electrooptic properties make BSO crystals attractive in a range of applications:M a i n fe a t u re s
High electro-optic coefficient (r41 = 3,5 pm/V)■ Low dark conductivity■ Large size elements or wafers up to 3”■ Customization available upon request

Spatial light modulators■ Optical switches■ Optical correlators■

104

Bi12GeO20

Crystal structure

Cubic, point group 23

Lattice parameters

10,15 ÅDensity

9,2 g/cm3

Transmission Range

0,45-7 µm

Refractive Index @0.63µm

2,55

Optical Activity @500 nm

41,5 deg/mm

Electro-Optic Coefficient r41

3,5 pm/V

Dielectric constant40

Dark Resistance

1014 Ohm cm

spatial light modulators, optical switches, phase conjugation mixers. BSO
crystals are grown by modified Czochralski method and available in up to 3‘‘diameter aperture size.
Crystals can be supplied with ITO coatings on request
Standard specifications■

Application examples

Chemical formula

S t a n d a rd p ro d u c t s
BGO CRYSTALS

Clear aperture

85%

Face dimensions tolerance+0/-0,2 mm

Thickness tolerance±0,2 mm

Parallelism error<30 arcsec

Protective chamfers<0,3 mm at 45°

Surface quality

40-20 S-D

Wavefront distortion<λ/4@632,8 nm

Coatings

Uncoated

Mount

Unmounted

FACE DIMENSIONS
5 x 5 mm
10 x 10 mm
20 x 20 mm
30 x 30 mm

LENGTHORIENTATION

SKU

PRICE

5 mm

[100]

6871

520 €

5 mm

[110]

6868

520 €

5 mm

[100]

6873

680 €

5 mm

[110]

6872

680 €

1 mm

[100]

6875

490 €

1 mm

[110]

6874

490 €

1 mm

[110]

6876

590 €

1,5 mm

[110]

6877

590 €

sales@4Lasers.com

105

LASER COMPONENTS

Laser
Nonlinearcomponents
crystals

Take a tour through a standard list of 4Lasers laser components,
Nonlinear optical crystals are used in many different
which include dielectric thin-film mirrors, metal-coated mirrors,
nonlinear parametric applications. To mention a few, second
Rimkusbeamsplitters, lenses, prisms, windows, substrates, andDonatas
filters forharmonic generation, difference frequency generation, opticalultraviolet, visible and infrared applications. Do not hesitate toparametric amplification and other. A proper crystal has torequest custom, if particular components that you are looking for
be chosen in order to use it for a particular application. It
are not in the standard list.
should have: transparency in the required spectral range,adequate birefringence for phase-matching, a high nonlinear
coefficient, high optical damage threshold, and otherproperties. Contact 4Lasers team for assistance and custom
solutions.
4Lasers develops and supplies different nonlinear crystals for
fundamental, applied research and industrial applications.
Available crystal growth techniques: Stepanov, Kyropoulos,
Czochralski (CZ), temperature gradient technique (TGT), flux
method.

Co a t e d l a s e r c o m p o n e n t s

M e t a l - c o a t e d m i r ro r s

Beamsplitters

Le n s e s

Pr i s m s

Wi n d o w s a n d s u b s t r a t e s

Fi l t e r s

106sales@4Lasers.com

107

LASER COMPONENTS

CoatedNonlinearlaser
crystals
components

4Lasers provides
thin-film
metal-coatedNonlinear
optical dielectric
crystals areused inand
many
different laser
components
for
use
in
the
ultraviolet,
visible,infrared
nonlinear parametric applications. To mentionanda few,
secondwavelength
ranges.
Non-standard
components
areavailableupon
harmonic generation, difference frequency generation,
opticalDonatas Rimkus
request.
Contact
usforcustomsolutionsandpricing.
parametric amplification and other. A proper crystal has tobechosenin orderdielectric
to use it thin-film
for a particular
4Lasers
standard
coatedapplication.
mirrors are It
designedshouldhave: transparency
in the required spectral
range,
for laser-line,
broadband, multi-wavelengthand beamsplitting
adequatebirefringencefor phase-matching,a highnonlinearor combining
applications.
Standard dielectric
thin-film
opticalcoefficient,highopticallaser
damageand otherelements also
includecavitythreshold,output couplers
and variable
properties.
Contact which
4Lasersare
team
for assistanceand custom
reflectivity mirrors,
primarily
used as output
mirrors forsolutions.
stable and unstable laser resonators, respectively.
4Lasers
develops
and aresupplies
different
nonlinear
crystals for
Metal-coatedmirrors
an excellent
choicefor applications,fundamental,
appliedresearch
industrial
applications.
where uniform,
broadband,
lowandGDD,nearly angle
of incidence
Available
crystalgrowthtechniques:
Stepanov,
Kyropoulos,
insensitive reflectance is required. 4Lasers provide standard
Czochralski(CZ),metal-coatedtemperature mirrors
gradientwith
technique(TGT), metalflux
flat and curved
the following
method.
coatings: UV enhanced aluminum, protected aluminum,

L a s e r l i n e m i r ro r s

B ro a d b a n d l a s e r m i r ro r s

Dual and multiw a v e l e n g t h m i r ro r s

Va r i a b l e re f l e c t i v i t ym i r ro r s

Laser cavity output
couplers

Wa v e l e n g t h s e p a r a t o r s
and combiners

protected silver, enhanced silver and protected gold.
Dielectric thinfilm mirrors

Metal-coatedmirrors

Beamsplitters

M e t a l - c o a t e d m i r ro r s

108sales@4Lasers.com

109

LASER COMPONENTS

Laser line mirrors

S t a n d a rd p ro d u c t s
MATERIAL

UVFS

Laser line mirrors exhibit high reflectance over a particular spectral range,
extending <10% of the central wavelength, at a specific angle of incidence
and polarization for non-normal incidence. Reflectance properties are based
M a i n fe a t u re s
Mirror substrates fabricated from high-quality UV grade fused silica■ Standard substrate dimensions are ø25,4 x 5 mm
■ 0° or 45° angle of incidence selection■ Designed for a high reflectance over a certain spectral range and angle ofincidence■ Custom coatings, substrate material and dimensions are available uponrequeston the optical interference phenomena of reflections from multiple dielectric
thin-film layers, which are carefully deposited on UV grade fused silica opticalsubstrates.
Standard specifications■

Application examples■

110

Nearly loss-free light beam steering and folding in laser-based systems

LASER LINE MIRRORS
Substrate material

UV grade fused silica

Clear aperture>85%

Face dimensions tolerance+0/-0,15 mm

Thickness tolerance±0,25 mm

Parallelism error<30 arcsec

Protective chamfers<0,35 mm at 45°

Surface quality

20-10 S-D

Surface flatness<λ/8@632,8 nm

Laser induced damage threshold>12 J/cm2@1064 nm, 10 ns(for 1020-1070 nm mirrors)

DIMENSIONSWAVELENGTH
RANGE

ø25,4 x 5 mm

254-266 nm>99,3%

ø25,4 x 5 mm

340-355 nm>99,5%

ø25,4 x 5 mm

340-355 nm

ø25,4 x 5 mm

REFLECTANCE

AOI

SKU

PRICE

0°

6375

75 €

0°

6376

60 €

>99,85%

0°

9280

110 €

385-415 nm>99,5%

0°

6377

60 €

ø25,4 x 5 mm

510-535 nm>99,5%

0°

6378

60 €

ø25,4 x 5 mm

510-535 nm>99,9%

0°

9281

90 €

ø25,4 x 5 mm

770-830 nm>99,5%

0°

6379

60 €

ø25,4 x 5 mm

1020-1070 nm>99,5%

0°

6386

60 €

ø25,4 x 5 mm

1020-1070 nm>99,95%

0°

9282

110 €

ø25,4 x 5 mm

1520-1570 nm>99,5%

0°

6380

75 €

ø25,4 x 5 mm

1890-1990 nm>99,5%

0°

6381

85 €

ø25,4 x 5 mm

2000-2100 nm>99,5%

0°

6382

95 €

ø25,4 x 5 mm

254-266 nm

Rs>99,5%, Rp>98,5%

45°

6383

75 €

ø25,4 x 5 mm

340-355 nm

Rs>99,6%, Rp>99,2%

45°

6384

60 €

ø25,4 x 5 mm

340-355 nm

Rs>99,85%, Rp>99,7%

45°

9283

120 €

ø25,4 x 6,35 mm

510-532 nm

Rs>99,6%, Rp>99,0%

0-45°

15207

86 €

ø25,4 x 5 mm

510-535 nm

Rs>99,6%, Rp>99,2%

45°

6385

60 €

ø25,4 x 5 mm

510-535 nm

Rs>99,95%, Rp>99,85%

45°

9284

95 €

ø25,4 x 5 mm

385-415 nm

Rs>99,6%, Rp>99,2%

45°

6387

60 €

ø25,4 x 5 mm

770-830 nm

Rs>99,6%, Rp>99,2%

45°

6388

60 €

ø25,4 x 6,35 mm

1020-1070 nm

Rs>99,6%, Rp>99,0%

0-45°

15208

86 €

ø25,4 x 5 mm

1020-1070 nm

Rs>99,6%, Rp>99,2%

45°

6389

60 €

ø25,4 x 5 mm

1020-1070 nm

Rs>99,95%, Rp>99,85%

45°

9285

120 €

ø25,4 x 5 mm

1520-1570 nm

Rs>99,6%, Rp>99,2%

45°

6390

75 €

ø25,4 x 5 mm

1890-1990 nm

Rs>99,6%, Rp>99,2%

45°

6392

85 €

ø25,4 x 5 mm

2000-2100 nm

Rs>99,6%, Rp>99,2%

45°

6391

95 €

sales@4Lasers.com

111

LASER COMPONENTS

Broadband laser mirrors

S t a n d a rd p ro d u c t s
MATERIAL

UVFS

Broadband laser mirrors provide high average reflectance over a broad
spectral range at a specific angle of incidence and polarization for nonnormal incidence. These properties are based on the optical interference
M a i n fe a t u re s
Mirror substrates fabricated from high-quality UV grade fused silica■ Standard substrate dimensions are ø25,4 x 5 mm
■ Designed for a high reflectance (>99%) over a broad wavelength range■ 0° or 45° angle of incidence selection■ Custom coatings, substrate material and dimensions are available uponrequestHigh reflectivity mirrors for tunable and broadband laser sources■ Broadband light beam steering and folding■112

ø25,4 x 5 mm

WAVELENGTHRANGEAVERAGEREFLECTANCE

350-400 nm>99%

400-700 nm>99%

750-1100 nm

AOI

SKU

PRICE

0°

6289

60 €

0°

6290

85 €

>99%

0°

6323

85 €

1280-1600 nm

>99%

0°

6326

105 €

350-400 nm>99% (s+p)/2

45°

6327

60 €

400-700 nm>99% (s+p)/2

45°

6324

85 €

750-1100 nm>99% (s+p)/2

45°

6328

85 €

1280-1600 nm>99% (s+p)/2

45°

6325

105 €

phenomena of reflections from multiple dielectric thin-film layers, which arecarefully deposited on UV grade fused silica optical substrates.

Standard specifications■

Application examples

DIMENSIONSBROADBAND LASER MIRRORS
Substrate material

UV grade fused silica

Clear aperture>85%

Face dimensions tolerance+0/-0,15 mm

Thickness tolerance±0,25 mm

Parallelism error<30 arcsec

Protective chamfers<0,35 mm at 45°

Surface quality

20-10 S-D

Surface flatness<λ/8@632,8 nm

Laser induced damage threshold

1 J/cm2@1064 nm, 10 ns (for 750-1100 nm mirrors)

sales@4Lasers.com

113

LASER COMPONENTS

Dual and multi wavelength mirrors

S t a n d a rd p ro d u c t s
MATERIAL

UVFS

Dual ant multi wavelength mirrors provide a high reflectance over several
certain spectral ranges at a specific angle of incidence and polarization
for non-normal incidence. Reflectance properties are based on the optical
M a i n fe a t u re s
Mirror substrates fabricated from high-quality UV grade fused silica■ Standard substrate dimensions are ø25,4 x 5 mm
■ Designed to be highly reflective at several certain wavelength ranges■ 0° or 45° angle of incidence selection■ Custom coatings, substrate material and dimensions are available uponrequestSimultaneous beam steering and folding of fundamental radiation laser
beam and its harmonics■ Laser system alignment using visible wavelength laser■114

ø25,4 x 5 mm

AOI

SKU

PRICE

254-266 nm + 510-535 nm

>99%

0°

6330

105 €

385-415 nm + 770-830 nm>99,5%

0°

6331

85 €

510-535 nm + 1020-1070 nm>99,5%

0°

6332

85 €

254-266 nm + 340-355 nm + 510-535 nm + 1020-1070 nm

>97%

0°

6329

145 €

254-266 nm + 510-535 nm

Rs>99%, Rp>98%

45°

6334

105 €

385-415 nm + 770-830 nm

Rs>99,5%, Rp>98,5%

45°

6335

85 €

510-535 nm + 1020-1070 nm

Rs>99,5%, Rp>98,5%

45°

6336

85 €

254-266 nm + 340-355 nm + 510-535 nm + 1020-1070 nm

Rs>97%, Rp>94%

45°

6333

145 €

WAVELENGTH RANGEREFLECTANCE

interference phenomena of reflections from multiple dielectric thin-filmlayers, which are carefully deposited on UV grade fused silica opticalsubstrates.
Standard specifications■

Application examples

DIMENSIONSDUAL AND MULTI WAVELENGTH MIRRORS
Substrate material

UV grade fused silica

Substrate dimensions

ø25,4 x 5 mm

Clear aperture>85%

Face dimensions tolerance+0/-0,15 mm

Thickness tolerance±0,25 mm

Parallelism error<30 arcsec

Protective chamfers<0,35 mm at 45°

Surface quality

20-10 S-D

Surface flatness<λ/8@632,8 nm

Laser induced damage threshold

4 J/cm2@1064 nm, 10 ns(for 510-535 nm + 1020-1070 nm mirrors)

sales@4Lasers.com

115

LASER COMPONENTS

Variable reflectivity mirrors

S t a n d a rd p ro d u c t s
MATERIAL

UVFS

4Lasers variable reflectivity mirrors provide a circularly symmetric reflectanceprofile according to the super-Gaussian function with order of 2. Thesemirrors are favorable in high-power unstable laser resonators for their wide
filling of the active medium and weak diffraction on hard-edge aperture.
M a i n fe a t u re s
Mirror substrates fabricated from high-quality UV grade fused silica■ Standard substrate dimensions are ø25,4 x 5 mm
■ Central reflectance from 15% to 35% at 1064 nm wavelength■ Custom reflectance profiles, substrates material and dimensions areavailable upon request■

116

Laser cavity output coupler for unstable laser resonatorø25,4 x 5 mm

WAVELENGTH

1064 nmCENTRAL
REFLECTANCE

SKU

PRICE

15%

6539

460 €

20%

6540

460 €

25%

6541

460 €

30%

6542

460 €

35%

6543

460 €

Therefore, super-Gaussian variable reflectivity mirrors contribute to betternear- and far-field beam quality. It is worth to mention that variablereflectivity mirrors can be designed to have various reflectance profiles, suchas linear, parabolic, Gaussian.
Standard specifications■

Application examples

DIMENSIONSVARIABLE REFLECTIVITY MIRRORS
Radius w0

2 mm

Gaussian order n2

Substrate material

UV grade fused silica

Clear aperture>85%

Face dimensions tolerance+0/-0,15 mm

Thickness tolerance±0,25 mm

Parallelism error<30 arcsec

Protective chamfers<0,35 mm at 45°

Surface quality

20-10 S-D

Surface flatness<λ/8@632,8 nm

Rear surface		Antireflective coatedLaser induced damage threshold>6 J/cm2@1064 nm, 10 ns

sales@4Lasers.com

117

LASER COMPONENTS

Laser cavity output couplers

S t a n d a rd p ro d u c t s
MATERIAL

WAVELENGTH
RANGE

770-830 nm

UVFS

Output couplers are used in stable laser resonators in order to emit a part ofthe energy, which is circulating in the laser cavity. One has to carefully selectthe proper spatially constant reflection/transmission ratio of the output
coupler in order to optimize the lasing operation and prevent from damaging
intracavity optical elements. Front surface of output couplers is partially

M a i n fe a t u re s
Mirror substrates fabricated from high-quality UV grade fused silica■ Standard substrate dimensions ø25,4 x 5 mm
■ 50% - 99% reflectance selection at most popular wavelength ranges■ Custom coatings, substrate material and dimensions available uponrequestreflective coated at a certain wavelength range, while the rear surface isantireflective coated in order to prevent Fresnel reflection losses. What ismore, these laser cavity output couplers can be successfully implemented as
fixed ratio laser power attenuators for a certain wavelength range.

Application examples
Output couplers for stable laser resonators■ Partial reflectors (beam attenuators)■

ø25,4 x 5 mm

1020-1070 nm

1520-1570 nm

REFLECTANCE

AOI

SKU

PRICE

50% ± 3%

0-5°

6522

95 €

75% ± 3%

0-5°

6523

95 €

90% ± 3%

0-5°

6524

95 €

95% ± 2%

0-5°

6525

95 €

97% ± 1%

0-5°

6444

95 €

99% ± 0,5%

0-5°

6526

95 €

50% ± 3%

0-5°

6527

95 €

75% ± 3%

0-5°

6528

95 €

90% ± 3%

0-5°

6529

95 €

95% ± 2%

0-5°

6530

95 €

97% ± 1%

0-5°

6531

95 €

99% ± 0,5%

0-5°

6532

95 €

50% ± 3%

0-5°

6533

115 €

75% ± 3%

0-5°

6534

115 €

90% ± 3%

0-5°

6535

115 €

95% ± 2%

0-5°

6536

115 €

97% ± 1%

0-5°

6537

115 €

99% ± 0,5%

0-5°

6538

115 €

Standard specifications■

118

DIMENSIONSLASER CAVITY OUTPUT COUPLERS
Substrate material

UV grade fused silica

Clear aperture>85%

Face dimensions tolerance+0/-0,15 mm

Thickness tolerance±0,25 mm

Parallelism error<30 arcsec

Protective chamfers<0,35 mm at 45°

Surface quality

20-10 S-D

Surface flatness<λ/8@632,8 nm

Rear side

Antireflective coated at operating wavelength range

Laser induced damage threshold>10 J/cm2@1064 nm, 10 ns(for 1020-1070 nm couplers)sales@4Lasers.com

119

LASER COMPONENTS

Wavelength separators and combiners

S t a n d a rd p ro d u c t s
MATERIAL

UVFS

Wavelength separators and combiners provide spatial separation or
combination of different spectral components. These optical elements
feature highly reflective dielectric coatings on the front side andM a i n fe a t u re s
Substrates fabricated from high-quality UV grade fused silica■ Standard substrate dimensions are ø25,4 x 5 mm
■ 0° or 45° angle of incidence selection■ Custom coatings, substrate material and dimensions are available uponrequestantireflective dielectric coatings for transmissive spectral components on
the rear side of UV grade fused silica substrates.

Standard specifications■

Application examples
Laser separation of the laser fundamental wavelength and its harmonics■ Laser beam combining■ Laser resonator pump (rear) mirror■

120

WAVELENGTH SEPARATORS AND COMBINERS
Substrate material

UV grade fused silica

Clear aperture>85%

Face dimensions tolerance+0/-0,15 mm

Thickness tolerance±0,25 mm

Parallelism error<30 arcsec

Protective chamfers<0,35 mm at 45°

Surface quality

20-10 S-D

Surface flatness<λ/8@632,8 nm

Laser induced damage threshold>10 J/cm2@1064 nm, 10 ns(for 1020 nm - 1070 nm reflecting separator)

DIMENSIONS

ø25,4 x 5 mm

AOI

SKU

PRICE

R>99,5%@254-266 nm

T>90%@340-355 nm + 510-535 nm + 1020-1070 nm

0°

6359

88 €

R>99,5%@340-355 nm

T>93%@510-535 nm + 1020-1070 nm

0°

6544

74 €

R>99,5%@385-415 nm

T>95%@770-830 nm

0°

6545

74 €

R>99,5%@510-535 nm

T>95%@1020-1070 nm

0°

6546

74 €

R>99,5%@770-830 nm

T>95%@385-415 nm

0°

6548

74 €

R>99,5%@770-830 nm

T>95%@510-535 nm

0°

6547

74 €

R>99,5%@1020-1070 nm

T>95%@510-535 nm

0°

6549

74 €

R>99,5%@1020-1070 nm

T>95%@800-810 nm

0°

6550

74 €

R>99,5%@1020-1070 nm

T>95%@940-980 nm

0°

6551

195 €

R>99,5%@1520-1570 nm

T>95%@940-980 nm

0°

6552

90 €

R>99,5%@1890-1990 nm

T>95%@780-820 nm

0°

6553

98 €

R>99,5%@2000-2100 nm

T>95%@780-820 nm

0°

6554

110 €

Rs>99,5%, Rp>98,5%@254-266 nm

Ts>85%, Tp>95%@340-355 nm + 510-535 nm + 1020-1070 nm

45°

6555

88 €

Rs>99,6%, Rp>99,2%@340-355 nm

Ts>91%, Tp>95%@510-535 nm + 1020-1070 nm

45°

6556

74 €

Rs>99,6%, Rp>99,2%@385-415 nm

Ts>93%, Tp>97%@770-830 nm

45°

6557

74 €

Rs>99,6%, Rp>99,2%@510-535 nm

Ts>93%, Tp>97%@1020-1070 nm

45°

6558

74 €

Rs>99,6%, Rp>99,2%@770-830 nm

Ts>93%, Tp>97%@385-415 nm

45°

6560

74 €

Rs>99,6%, Rp>99,2%@770-830 nm

Ts>93%, Tp>97%@510-535 nm

45°

6559

74 €

Rs>99,6%, Rp>99,2%@1020-1070 nm

Ts>93%, Tp>97%@510-535 nm

45°

6561

74 €

Rs>99,6%, Rp>99,2%@1020-1070 nm

Ts>93%, Tp>97%@800-810 nm

45°

6562

74 €

Rs>99,6%, Rp>99,2%@1020-1070 nm

Ts>93%, Tp>97%@940-980 nm

45°

6563

195 €

Rs>99,6%, Rp>99,2%@1520-1570 nm

Ts>93%, Tp>97%@940-980 nm

45°

6564

90 €

Rs>99,6%, Rp>99,2%@1890-1990 nm

Ts>93%, Tp>97%@780-820 nm

45°

6565

98 €

Rs>99,6%, Rp>99,2%@2000-2100 nm

Ts>93%, Tp>97%@780-820 nm

45°

6566

110 €

REFLECTED WAVELENGTH RANGE

TRANSMITTED WAVELENGTH RANGE

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121

LASER COMPONENTS

Flat and curved metal-coated mirrors

S t a n d a rd p ro d u c t s
MATERIALDIMENSIONSCOATINGSUV enhanced AluminumProtected Aluminum

UVFS

Enhanced Silver

M a i n fe a t u re s
Mirror substrates fabricated from high-quality UV grade fused silica■ Standard substrate dimensions are ø25,4 x 5 mm
■ UV enhanced aluminum, protected aluminum, protected silver, low GDD
enhanced silver and protected gold metallic coatings selection■ Relatively uniform reflectance over a wide wavelength range■ Radius of curvature selection from infinity to -200 mm■ Custom metal-coated mirrors available upon request

polarization state of light, thus their reflection losses are significantly higher
compared to dielectric thin-film mirrors.

122>85%@300 nm-IR

Protected Gold>96%@400 nm-IR>99%@700-900 nm>96%@900 nm-IR

TYPE

ROC

SKU

PRICE

Plano-plano

Infinity

6343

34 €

Plano-concave-50 mm6345

52 €Plano-concave-100 mm

6344

52 €

Plano-plano-200 mm

6346

52 €

Plano-concave

Infinity

6355

28 €

Plano-concave-50 mm6356

46 €Plano-concave-100 mm

6357

46 €

Plano-concave-200 mm

6358

46 €

Plano-plano

Infinity

6347

32 €

Plano-concave-50 mm6348

50 €Plano-concave-100 mm

6349

50 €

Plano-concave-200 mm

6354

50 €

Plano-plano

Infinity

15197

62 €

Plano-plano

Infinity

6350

38 €

Plano-concave-50 mm6351

56 €Plano-concave-100 mm

6352

56 €

Plano-concave-200 mm

6353

56 €

Standard specifications■

FLAT AND CURVED METAL-COATED MIRRORS
Substrate material

UV grade fused silica

Substrate dimensions

ø25,4 x 5 mm

Clear aperture>85%

Face dimensions tolerance+0/-0,15 mm

Thickness tolerance±1 mmProtective chamfers<0,35 mm at 45°

Parallelism error<3 arcmin for plano-plano mirrors

Application examples

Surface quality

40-20 S-D

Broadband reflectivity and low chromatic dispersion mirrors for whitelight interferometers and broadband laser sources■ Partially transmissive broadband mirrors■ Extremely long infrared (up to 20 μm) mirrors■ Plano-convex and plano-concave designs

Surface flatness<λ/8@632,8 nm

Laser induced damage threshold>0,25 J/cm2@1064 nm, 11 ns for protected aluminum
mirrors,>1,8 J/cm2@1064 nm, 11 ns for protected silver mirrors
and for enhanced silver mirrors,>0,9 J/cm2@1064 nm, 11 ns for protected gold mirrors■>80%@230-700 nm

ø25,4 x 5 mmProtected Silver

Metal-coated mirrors exhibit a relatively uniform reflectivity over wide
wavelength range. They are nearly insensitive to angle of incidence and

AVERAGE REFLECTANCE

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123

LASER COMPONENTS

LensesNonlinear crystals

4Lasers provide
variety ofcylindricaland conicalNonlinear
opticala crystals
arespherical,
used in manydifferent
lensesfabricated
from
BK7
and
UVFS
glassesforUV,
andnonlinear parametric applications. To mention a few,VIS
secondDonatas Rimkus
NIR
applications.
Standard
lensesareuncoated,althoughharmonic generation, difference frequency generation, opticalantireflective
coatings areandavailable
upon
requestas haswelltoasparametricamplification
other. A
proper
crystalcustomsolutions.
bechosenin order to use it for a particular application. Itshould have: transparency in the required spectral range,adequate birefringence for phase-matching, a high nonlinear
coefficient, high optical damage threshold, and otherproperties. Contact 4Lasers team for assistance and custom
solutions.
4Lasers develops and supplies different nonlinear crystals for
fundamental, applied research and industrial applications.
Available crystal growth techniques: Stepanov, Kyropoulos,
Czochralski (CZ), temperature gradient technique (TGT), flux
method.

P l a n o - c o nve x s p h e r i c a llenses

P l a n o - c o n c a ve s p h e r i c a l l e n s e s

B i - c o nv e x s p h e r i c a l l e n s e s

B i - c o n c a ve s p h e r i c a l l e n s e s

P l a n o - c o nve x c y l i n d r i c a llensesPlano-concave cylindricallensesAxicons (conical lenses)

124

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125

S t a n d a rd p ro d u c t s
MATERIAL

DIAMETERFOCAL LENGTH

SKU

PRICE

15 €

20 mm

7118

32 €

15 €

40 mm

7119

32 €

7016

15 €

50 mm

7120

32 €

75 mm

7017

15 €

75 mm

7121

32 €

100 mm

7018

15 €

100 mm

7122

32 €

150 mm

7019

15 €

150 mm

7123

32 €

200 mm

7020

15 €

200 mm

7124

32 €

250 mm

7021

15 €

300 mm

7125

32 €

300 mm

7022

15 €

400 mm

7126

32 €

350 mm

7023

15 €

500 mm

7127

32 €

500 mm

7024

15 €

700 mm7128

32 €1000 mm

7025

15 €

1000 mm

7129

32 €

1500 mm

7026

15 €

1500 mm

7130

32 €

30 mm

7134

24 €

30 mm

7159

38 €

40 mm

7135

19 €

40 mm

7160

38 €

50 mm

7136

19 €

50 mm

7161

38 €

60 mm

7137

19 €

60 mm

7162

38 €

75 mm

7138

19 €

75 mm

7163

38 €

100 mm

7141

19 €

100 mm

7166

38 €125 mm

7142

19 €

125 mm

7167

38 €

150 mm

7143

19 €

150 mm7168

38 €

PLANO-CONVEX LENSES

175 mm

7144

19 €

175 mm7169

38 €Substrate material

BK7, UVFS

200 mm

7145

19 €

200 mm7170

38 €Wavelength range

Uncoated BK7 lenses: 350 nm - 2 μm
Uncoated UVFS lenses: 185 nm - 2,1 μm

250 mm

7146

19 €

250 mm

7171

38 €

300 mm

7147

19 €

300 mm7172

38 €Clear aperture>90%

400 mm

7148

19 €

400 mm7173

38 €Diameter tolerance+0/-0,1 mm

Application examples

500 mm

7149

19 €

500 mm7174

38 €Edge thickness

2 mm

700 mm

7150

19 €

750 mm7175

38 €Focusing a collimated beam
■ Collimating beam from a point source■ Beam expanders and collimators

Thickness tolerance±0,5 mm1000 mm

7151

19 €

1000 mm

7176

38 €

Centration error<3 arcmin1500 mm

7152

19 €

1500 mm

7177

38 €

Focal length tolerance±3%@632,8 nm

2000 mm

7153

19 €

2000 mm

7178

38 €

Protective chamfers<0,35 mm at 45°

3000 mm

7154

19 €

3000 mm

7179

38 €

Surface quality

40-20 S-D

4000 mm

7155

19 €

4000 mm

7180

38 €

Surface irregularity≤λ/8@632,8 nm

5000 mm

7156

19 €

5000 mm

7181

38 €

Coatings

Uncoated, available upon request

2500 mm

7157

19 €

7000 mm

7182

38 €

10000 mm

7158

19 €

10000 mm

7183

38 €

CT
ET

Diameter

LASER COMPONENTS

Plano-convex spherical lensesxø12,7 mmRf

Plano-convex spherical lenses have one plano and one spherical convex
surface, while their focal lengths are positive. These lenses provide the best

performance when used for 5X to infinite-conjugate ratio applications, e.g.
focusing a collimated light beam or collimating beam from a point source.
BK7

M a i n fe a t u re s
Fabricated from high-quality UV grade fused silica and BK7 glasses■ Standard diameters are ø12,7 mm and ø25,4 mm■ Focal length selection from 20 mm to 10 000 mm■ Antireflective coatings, custom substrate material, dimensions, and focal
lengths available upon request

Standard specifications

■

■

126

ø25,4 mm

FOCAL LENGTH

SKU

PRICE

20 mm

7014

40 mm

7015

50 mm

MATERIAL

DIAMETER

ø12,7 mmUVFS

ø25,4 mmsales@4Lasers.com

127

S t a n d a rd p ro d u c t s
MATERIAL

DIAMETERET
CTx

ø12,7 mm

Diameter

LASER COMPONENTS

Plano-concave spherical lenses

R

BK7

Plano-concave spherical lenses have one plano and one spherical concave
surface, while their focal lengths are negative. These lenses provide the best
performance when used for 5X to infinite-conjugate ratio applications, e.g.
M a i n fe a t u re s
Fabricated from high-quality UV grade fused silica and BK7 glasses■ Standard diameters are ø12,7 mm and ø25,4 mm■ Focal length selection from -20 mm to -10000 mm■ Antireflective coatings, custom substrate material, dimensions, and focal
lengths available upon request

collimating a convergent beam, diverging a collimated beam. To prevent
spherical aberrations collimated beam should always be incident on curved
lens surface and vice versa.
Standard specifications

■

SKU

PRICE

-25 mm

7507-50 mm

7508-60 mm

MATERIAL

DIAMETERFOCAL LENGTH

SKU

PRICE

15 €

-20 mm

7516

32 €

15 €

-50 mm

7518

32 €

7509

15 €

-100 mm

7519

32 €

-75 mm7510

15 €-200 mm

7520

32 €

-100 mm

7511

15 €

-300 mm

7521

32 €

-150 mm

7512

15 €

-400 mm

7522

32 €

-200 mm

7513

15 €

-500 mm

7523

32 €

-250 mm

7514

15 €

-1000 mm

7524

32 €

-300 mm

7515

15 €

-30 mm

7534

38 €-30 mm

7525

19 €-40 mm

7553

38 €-40 mm

7543

19 €-50 mm

7535

38 €-50 mm

7526

19 €-60 mm

7554

38 €-75 mm

7527

19 €-70 mm7555

38 €-100 mm

7528

19 €

-80 mm7556

38 €-125 mm

7544

19 €

-90 mm7557

38 €-150 mm

7545

19 €

-100 mm

7537

38 €

-200 mm

7529

19 €

-150 mm

7558

38 €

-250 mm

7546

19 €

-200 mm

7538

38 €

-300 mm

7530

19 €

-300 mm

7539

38 €

-400 mm

7531

19 €

-400 mm

7540

38 €

-500 mm

7532

19 €

-500 mm

7541

38 €

-750 mm

7547

19 €

-700 mm

7559

38 €

-1000 mm

7533

19 €

-1000 mm

7542

38 €

ø12,7 mmUVFS

ø25,4 mm

Substrate material

BK7, UVFS-1500 mm

7549

19 €

-2000 mm

7536

38 €

Wavelength range

Uncoated BK7 lenses: 350 nm - 2 μm
Uncoated UVFS lenses: 185 nm - 2,1 μm-2000 mm

7548

19 €

-3000 mm

7560

38 €

Clear aperture>90%-3000 mm

7550

19 €

-5000 mm

7561

38 €

Diameter tolerance+0/-0,1 mm-5000 mm

7551

19 €

-10000 mm

7562

38 €

Application examples

Edge thickness

2 mm

Collimating a convergent beam
Diverging a collimated beam
■ Relay imaging

Thickness tolerance±0,5 mm

Centration error<3 arcmin

Focal length tolerance±3%@632,8 nm

Protective chamfers<0,35 mm at 45°

Surface quality

40-20 S-D

Surface irregularity≤λ/8@632,8 nm

Coatings

Uncoated, available upon request

■
■

128

PLANO-CONCAVE LENSES

ø25,4 mm

FOCAL LENGTH

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129

S t a n d a rd p ro d u c t s
MATERIAL
ET

BK7

x

R

Bi-convex spherical lenses feature two convex surfaces with the same radiusof curvature, while their focal length is positive. These lenses perform the

M a i n fe a t u re s
Fabricated from high-quality UV grade fused silica and BK7 glasses■ Standard diameter is ø25,4 mm■ Focal length selection from 25 mm to 100 mm■ Antireflective coatings, custom substrate material, dimensions, and focal
lengths available upon request

UVFS

PRICE
20 €

50 mm

7570

20 €

75 mm

7571

20 €

100 mm

7572

20 €

25 mm

7565

60 €

50 mm

7566

60 €

75 mm

7567

60 €

100 mm7568

60 €Standard specifications
BI-CONVEX SPHERICAL LENSES
BK7, UVFS

Wavelength range

Uncoated BK7 lenses: 350 nm - 2 μm
Uncoated UVFS lenses: 185 nm - 2,1 μm

Clear aperture>90%

Diameter tolerance+0/-0,1 mm

Application examples

Edge thickness

2 mmFinite-conjugate imaging
Beam relay applications■ Beam expanders

Thickness tolerance±0,5 mm

Centration error<3 arcmin

Focal length tolerance±3%@632,8 nm

Protective chamfers<0,35 mm at 45°

Surface quality

40-20 S-D

Surface irregularity≤λ/8@632,8 nm

Coatings

Uncoated, available upon request■

ø25,4 mm

SKU
7569

R

Substrate material■

ø25,4 mm

FOCAL LENGTH
25 mm

best at finite conjugate (0,2X - 5X ratio) applications. At 1:1 conjugate ratio
spherical aberrations, coma and distortion are minimized.

■

130

DIAMETERCT

Diameter

LASER COMPONENTS

Bi-convex spherical lenses

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131S t a n d a rd p ro d u c t s
MATERIAL
ET
CT

x

R

R

Bi-concave spherical lenses feature two spherical concave surfaces with thesame radius of curvature, while their focal length is negative.

M a i n fe a t u re s
Fabricated from high-quality UV grade fused silica, BK7 glasses■ Standard diameter is ø25,4 mm■ Focal length selection from -25 mm to -100 mm■ Antireflective coating, custom substrate material, dimensions, and focal
lengths available upon request

■
■

132

Beam expanders
Relay imaging

UVFS

DIAMETER

ø25,4 mm

ø25,4 mm

FOCAL LENGTH

SKU

PRICE

-25 mm

7576

20 €-50 mm

7577

20 €-75 mm7578

20 €-100 mm

7579

20 €

-25 mm

7580

70 €-50 mm

7573

70 €-75 mm7574

70 €-100 mm

7575

70 €

The performance of these lenses is best when used for finite conjugate (0,2X 5X ratio) applications, most often to diverge converging light.

Standard specifications■

Application examples

BK7

Diameter

LASER COMPONENTS

Bi-concave spherical lenses

BI-CONCAVE SPHERICAL LENSES
Substrate material

BK7, UVFS

Wavelength range

Uncoated BK7 lenses: 350 nm - 2 μm
Uncoated UVFS lenses: 185 nm - 2,1 μm

Clear aperture>90%

Diameter tolerance+0/-0,1 mm

Center thickness

2 mmThickness tolerance±0,5 mm

Centration error<3 arcmin

Focal length tolerance±3%@632,8 nm

Protective chamfers<0,35 mm at 45°

Surface quality

40-20 S-D

Surface irregularity≤λ/8@632,8 nm

Coatings

Uncoated, available upon request

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133

LASER COMPONENTS

Plano-convex cylindrical lenses

S t a n d a rd p ro d u c t s
MATERIALFACEDIMENSIONS
HXL

CT
ET

25,4 x 25,4 mm

H

x

R

L

f

BK7

25,4 x 50,8 mm

Plano-convex cylindrical lenses feature single plano and single convex
cylindrical surface, while their focal length is positive. These lenses operate
only in one dimension rather than two, compared to plano-convex sphericalM a i n fe a t u re s
Fabricated from high-quality UV grade fused silica, BK7 glasses■ Standard face dimensions are 25,4 x 25,4 mm and 25,4 x 50,8 mm■ Focal length selection from 50 mm to 10000 mm■ Antireflective coatings, custom substrate material, dimensions, and focal
lengths available upon request

lenses. Plano-convex cylindrical lenses provide the best performance at thesame operating conditions as plano-convex spherical lenses: from 5X tofinite-conjugate ratio.

Standard specifications

■

UVFS

PLANO-CONVEX CYLINDRICAL LENSES

25,4 x 50,8 mm

SKU

PRICE

50 mm

7596

55 €

75 mm

7598

55 €

150 mm

7603

55 €

200 mm

7604

55 €

250 mm

7605

55 €

300 mm

7606

55 €

500 mm

7609

55 €

100 mm

7600

95 €

300 mm

7607

90 €

500 mm

7610

90 €

750 mm7611

90 €2000 mm

7612

90 €

10000 mm

7613

90 €

50 mm

7587

95 €

75 mm

7589

95 €

30 mm

7582

165 €

50 mm

7583

165 €

75 mm

7584

165 €

100 mm

7585

160 €

150 mm

7586

160 €

200 mm

7588

160 €

250 mm

7590

160 €

Substrate material

BK7, UVFS

300 mm

7591

160 €

Wavelength range

Uncoated BK7 lenses: 350 nm - 2 μm
Uncoated UVFS lenses: 185 nm - 2,1 μm

400 mm

7592

160 €

Clear aperture>90%

500 mm

7593

160 €

Diameter tolerance+0/-0,1 mm

750 mm

7594

160 €

Application examples

Edge thickness

2 mm1000 mm

7595

160 €

Coupling into a slit or linear shape detectors
Anamorphic beam shaping■ Astigmatism correction of laser diode beam

Thickness tolerance±0,5 mm

Centration error<3 arcmin

Focal length tolerance±3%@632,8 nm

Protective chamfers<0,35 mm at 45°

Surface quality

40-20 S-D

Surface irregularity<λ/4@632,8 nm

Coatings

Uncoated, available upon request

■
■

134

25,4 x 25,4 mm

FOCAL LENGTH

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135

LASER COMPONENTS

Plano-concave cylindrical lenses

S t a n d a rd p ro d u c t s
MATERIALFACEDIMENSIONS
HXL

ET
CT

25,4 x 25,4 mm
H
x

BK7

R

25,4 x 50,8 mm

Lf

25,4 x 25,4 mm

Plano-concave cylindrical lenses feature single plano, single concave
cylindrical surface and negative focal length. These lenses are similar toplano-concave spherical lenses, though the difference is that they operate

M a i n fe a t u re s
Fabricated from high-quality UV grade fused silica, BK7 glasses■ Standard face dimensions are 25,4 x 25,4 mm and 25,4 x 50,8 mm■ Focal length selection from -25 mm to -1000 mm■ Antireflective coatings, custom substrate material, dimensions, and focal
lengths available upon request

only in a single dimension rather than two symmetrical dimensions.
Applicable conditions for optimal performance are the same as for planoconcave lenses: from 5X to infinite-conjugate ratio.

136

PRICE

-50mm

7621

55 €

-75 mm7622

55 €-100 mm

7625

55 €

-200 mm

7626

55 €

-500 mm

7628

55 €

-50mm

7623

90 €

-75 mm7624

90 €-200 mm

7631

90 €

-500 mm

7627

90 €

-25 mm

7614

95 €-50 mm

7629

95 €-50 mm

7630

160 €

-100 mm

7615

160 €

-200 mm

7616

160 €

-300 mm

7617

160 €

-400 mm

7618

160 €

-500 mm

7619

160 €

-1000 mm

7620

160 €

PLANO-CONVEX CYLINDRICAL LENSES
Substrate material

BK7, UVFS

Wavelength range

Uncoated BK7 lenses: 350 nm - 2 μm
Uncoated UVFS lenses: 185 nm - 2,1 μm

Clear aperture>90%

Diameter tolerance+0/-0,1 mm

Application examples

Center thickness

2 mmAnamorphic beam shaping
Laser projection■ Laser scanning

Thickness tolerance±0,5 mm

Centration error<3 arcmin

Focal length tolerance±3%@632,8 nm

Protective chamfers<0,35 mm at 45°

Surface quality

40-20 S-D

Surface irregularity<λ/4@632,8 nm

Coatings

Uncoated, available upon request■

25,4 x 50,8 mm

SKU

Standard specifications

■

■

UVFS

FOCAL LENGTH

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S t a n d a rd p ro d u c t s
MATERIAL

Diameter

BK7
Diameter

LASER COMPONENTS

Axicons (conical lenses)

α

SHAPE

Plano-convex

GRADE

Regular

DIAMETER

ø25,4 mmα

Plano-convex

Advancedø25,4 mmUVFS

Axicons (conical lenses) are famous due to their ability to their transform acollimated Gaussian beam into an approximation of non-diffracting Bessel
beam in the near-field and ring-shaped beam in the far-field. Most often they
are used in tandem with other types of lenses. 4Lasers provide plano-convex
M a i n fe a t u re s
Fabricated from high-quality UV grade fused silica, BK7 glasses■ Plano-convex and plano-concave designs■ Regular and advanced grade axicons■ Wide axicon apex angle selection■ Antireflective coatings, customization available upon request

and plano-concave types of conical lenses. These lenses feature one convex
surface or one concave conical surface, respectively, while second surface is
plano in both cases.

Corneal surgery
Optical coherence tomography■ Atom trapping
■
■

138

Regularø25,4 mm

SKU

PRICE

140°

7640

160 €

160°

7641

160 €

170°

7642

160 €

175°

7643

160 €

178°

7644

160 €

130°

7632

360 €

140°

7633

360 €

160°

7634

360 €

170°

7635

360 €

175°

7636

360 €

176°

7637

360 €

178°

7638

360 €

179°

7639

360 €

140°

7645

480 €

160°

7646

480 €

170°

7647

480 €

175°

7648

480 €

179°

7649

480 €

Standard specifications■

Application examples

Plano-concave

APEX
ANGLE

AXICONSType

Plano-convex

Substrate material

BK7, UVFS

Plano-concave
UVFS
Uncoated BK7 axicons: 350 nm - 2 μm
Uncoated UVFS axicons: 185 nm - 2,1 μm

Wavelength range
Clear aperture

>90%

>90%

Diameter tolerance+0/-0,1 mm+0/-0,1 mm

Apex rounding

Regular: <ø1 mm
Advanced: <ø0,4 mm

N/A

Angle tolerance

Regular: ±0,5°Advanced: ±0,1°

Regular: ±0,5°Central hole

N/A

Regular: ~ø1 mm,
depth ~2 mmProtective chamfers<0,35 mm at 45°<0,35 mm at 45°

Surface quality

Regular: 60-40 S-D
Advanced: 40-20 S-D

Regular: 60-40 S-D

Surface irregularity

Regular: <1λ@632,8 nm
Advanced: <λ/4@632,8 nm

Regular: <1λ@632,8 nm

Coatings

Uncoated

Uncoatedsales@4Lasers.com

139

LASER COMPONENTS

PrismsNonlinear crystals

4Lasers provide
andusedunmounted
dispersing prisms,
Nonlinear
opticaluncoatedcrystals arein many different
right-angle
prisms,cornercube
retroreflectors
prismsnonlinear parametric applications. To mention aandfew,penta
second
for
UV,
VIS
and
NIR
applications.
Applicationsof
theseprismsharmonic generation, difference frequency generation, opticalDonatas Rimkus
include beam
bending, folding,retroreflecting,
opticalparametricamplificationand other.
A proper crystal
hasalignment
toandchosen
more. inSince
mostof theprismsare initially
uncoated,beorder
to useit fora particularapplication.
It werecommend
the appropriate
coatings
to optimize
shouldhave: applying
transparency
in the required
spectralrange,
theperformance.
Metallicanddielectric
thin-film
coatings
areadequate birefringence for phase-matching, a highnonlinearavailable
upon
demand.
coefficient, high optical damage threshold, and otherproperties. Contact 4Lasers team for assistance and custom
solutions.
4Lasers develops and supplies different nonlinear crystals for
fundamental, applied research and industrial applications.
Available crystal growth techniques: Stepanov, Kyropoulos,
Czochralski (CZ), temperature gradient technique (TGT), flux
method.

140

Dispersing prisms

Right-angle prisms

Co r n e r c u b e re t ro re f l e c t o r s

Pe n t a p r i s m ssales@4Lasers.com

141

Th
ick
nes
s

MATERIAL

APEX ANGLE

SF11

59°

de

le

ng

th

S t a n d a rd p ro d u c t s

BK7

Si

LASER COMPONENTS

Dispersing prisms

UVFS

4Lasers standard uncoated isosceles dispersing prisms are fabricated from
UVFS, BK7, SF11 optical glasses and offer different dispersive properties.
Used in both intra- and extra-cavity setups for ultrashort laser pulse temporalM a i n fe a t u re s
Fabricated from high-quality UV fused silica, BK7, SF11 glasses■ Input and output faces are optically polished (refer to the drawing)■ Small losses for p-polarized light■ Group delay dispersion adjustment of ultrashort pulses■ Antireflective coatings, custom design, substrate material anddimensions available upon request

Compression of ultrashort laser pulses■ Dispersion compensation in mode-locked lasers■ Spatial separations of different spectral components
■

142

69°

MAX INPUT BEAM
DIAMETER

SKU

PRICE

10 mm

15 mm

6 mm

6617

49 €

18 mm

25 mm

12 mm

6622

95 €

25 mm

50 mm

22 mm

6623

195 €

10 mm

15 mm

6 mm

6615

40 €

18 mm

25 mm

12 mm

6618

69 €

25 mm

50 mm

22 mm

6619

140 €

10 mm

15 mm

6 mm

6616

72 €

18 mm

25 mm

12 mm

6620

125 €

25 mm

50 mm

22 mm

6621

260 €

manipulation. Their construction enables to use them at Brewster angle,
therefore p-polarized light losses are extremely low.

Standard specifications■

Application examples

67°

SIDE LENGTH

THICKNESSDISPERSING PRISMS
Substrate material

BK7, SF11, UVFS

Wavelength range

Uncoated BK7 prisms: 350 nm - 2 μm
Uncoated UVFS prims: 185 nm - 2,1 μm
Uncoated SF11 prisms: 420 nm - 2,3 μm

Design wavelength

800 nmClear aperture

80% of face and length width

Dimensions tolerance±0,25 mmAngle tolerance±2 arcmin

Protective chamfers<0,35 mm at 45°

Surface quality

40-20 S-D

Surface flatness≤λ/4@632,8 nm

Coatings

Uncoated, available upon request

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143

LASER COMPONENTS

Right-angle prisms

S t a n d a rd p ro d u c t s
MATERIAL

5 mm
BK7

10 mm
20 mm

A

5 mm
UVFS
C

B

4Lasers standard uncoated right-angle (45°-90°-45°) design prisms arefabricated from UVFS and BK7 optical glasses and have three opticallypolished rectangular surfaces (refer to the drawing). These prisms are
popular at 90° internal or external beam bending, 180° beam folding, image
rotation. These applications are based on the total internal reflection at glass-M a i n fe a t u re s
Fabricated from high-quality UV grade fused silica, BK7■ Rectangular faces are optically polished■ Standard and advanced grade selection■ Metallic and dielectric thin-film coatings, custom substrate material anddimensions are available upon request
Application examples
90° internal or external mirror■ Retroreflector■ Components for cube beamsplitter

10 mm
20 mm

GRADE

SKU

PRICE

Regular

6570

18 €

Regular

6571

20 €

Advanced

6572

42 €

Regular

6573

31 €

Advanced

6574

57 €

Regular

6576

45 €

Regular

6575

49 €

Advanced

6567

93 €

Regular

6568

59 €

Advanced

6569

116 €

air boundary inside the prism, except 90° external beam bending, which
requires metallic or highly reflective dielectric thin film to be applied onto
the hypotenuse face. Antireflective coatings have to be applied in order to
optimize the optical transmission for a particular application. Contact us forcoating service, custom solutions, and pricing.

Standard specifications■

RIGHT-ANGLE PRISMS
Substrate material

BK7, UVFS

Wavelength range

Uncoated BK7 prisms: 350 nm - 2 μm
Uncoated UVFS prisms: 185 nm - 2,1 μm

Clear aperture≥80% of face dimensions

Dimensions tolerance+0/-0,25 mm

90° angle tolerance

Regular grade: ±2 arcmin
Advanced grade: ±5 arcsec

Pyramidal tolerance

Regular grade: ±1 arcmin
Advanced grade: ±30 arcsec

Protective chamfers<0,25 mm at 45°

Surface quality

40-20 S-D

Surface flatness≤λ/4@632,8 nm

Coatings

Uncoated, available upon request■

144

DIMENSIONS
A=B=C

sales@4Lasers.com

145Penta prisms

Diameter

LASER COMPONENTS

Corner cube retroreflectors

A

A

B

Height4Lasers standard uncoated corner cube retroreflectors are fabricated fromhigh-quality UVFS and BK7 optical glasses. Corner cube retroreflector prisms
provide the beam deviation by 180° and creates an inverted, reversed image
independent of the angle of incidence, with a wide incident angle acceptanceM a i n fe a t u re s

range. Operating principle is based on three total internal reflections inside
the prism. Antireflective coatings have to be applied in order to optimize
the optical transmission for a particular application. Contact us for coating
service, custom solutions and pricing.

CORNER CUBE RETROREFLECTORS
Substrate material

BK7, UVFS

Beam deviation

180° ± 30 arcsec

Wavelength range

Uncoated BK7 reftoreflectors: 350 nm - 2 μm
Uncoated UVFS retroreflectors: 185 nm - 2,1 μm

Clear aperture>80% of face dimensions

Application examples

Dimensions tolerance+0/-0,3 mm

Beam alignment■ Retroreflectors

Angle tolerance±5 arcsec

Protective chamfers<0,35 mm at 45°

Surface quality

40-20 S-D

Surface flatness<λ/4@632,8 nm

Coatings

Uncoated, available upon request■

S t a n d a rd p ro d u c t s
DIAMETERHEIGHT

SKU

PRICE

BK7

ø25,4 mm17,5 mm

7564

140 €

UVFS

ø25,4 mm17,5 mm

7563

185 €

M a i n fe a t u re s

S t a n d a rd s p e c i f i c a t i o n sFabricated from high-quality BK7 glass■ 90° ± 1 arcmin deviation■ Does not invert, reverse beam or image■ <λ/10@632,8 nm surface flatness over clear aperture■ Antireflective coatings on input and output faces, custom substratematerial and dimensions upon request■

Application examples
Beam steering■ Optical system alignment■

S t a n d a rd p ro d u c t s
MATERIAL

BK7146

these five-sided reflecting design prisms are essential for applications, where
precise 90° deviation is required. Antireflective coatings have to be applied inorder to optimize the optical transmission for a particular application. Contact
us for coating service, custom solutions and pricing.

Standard specifications

Fabricated from high-quality UV grade fused silica, BK7 optical glasses■ Provides high-precision angle insensitive retroreflection (180° ± 30 arcsec)■ Inverts and reverses the image■ Antireflective coatings, custom material and dimensions available uponrequest■

MATERIAL

4Lasers unmounted penta prisms provide 90° beam and image deviation
without inverting or reversing the image. Penta prisms reflecting surfaces arealuminized with inconel and black paint overcoat, while input and output
faces are uncoated (refer to the drawing). An important feature is that theseprisms do not have to be precisely aligned to operate properly. Therefore,

FACE DIMENSIONS
AXB

SKU

PENTA PRISMS
Beam deviation

90˚± 1 arcmin

Wavelength range

Uncoated BK7 prisms: 350 nm - 2 μm

Clear aperture>70% of face dimensions length and width

Dimensions tolerance±0,1 mm

Angular tolerance±1 arcmin

Protective chamfers<0,35 mm at 45°

Surface quality

40-20 S-D

Surface flatness<λ/10@632,8 nm over clear aperture

Coatings

Reflecting surfaces: aluminized with inconeland black paint overcoat
Input and output surfaces: uncoated

PRICE

10 x 10 mm

7433

29 €

20 x 20 mm

7434

60 €

40 x 40 mm

7435

79 €

60 x 60 mm

7436

120 €

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147

LASER COMPONENTS

Windows
Nonlinear crystals

4Lasers provide
flat-parallelwindows,
flat-wedge
Nonlinear
opticaluncoatedcrystals areused in manydifferent
windows,
andcurvedwindows
fabricated
from
UVFS
and BK7
nonlinear parametric applications. To mention a few, second
opticalglasses
for
UV,
VIS
and
NIR
applications.
These
opticalharmonic generation, difference frequency generation,
opticalDonatasRimkuscomponents
arethesubstratesofmirrors,
outputcouplers
parametric amplification and other. A proper crystal has to andbeamsplittersin anyoffor
laser
and non laser
systems.It Theybechosen in order
tokinduse ita particularapplication.
areinitially
uncoatedanddemandmetallicordielectricshould have: transparency in the required spectral range,coatings
for a particularapplication.
4Lasers provide coating
service uponadequatebirefringencefor phase-matching,a high nonlinear
request.
Contact
usforcustomsolutionsandpricing.
coefficient, high optical damage threshold, and otherproperties. Contact 4Lasers team for assistance and custom
solutions.

Fl a t - p a r a l l e l w i n d o w s

Fl a t - we d g e w i n d o w s

Cu r v e d w i n d o w s

4Lasers develops and supplies different nonlinear crystals for
fundamental, applied research and industrial applications.
Available crystal growth techniques: Stepanov, Kyropoulos,
Czochralski (CZ), temperature gradient technique (TGT), flux
method.

148

sales@4Lasers.com

149

LASER COMPONENTS

Flat-parallel windows

S t a n d a rd p ro d u c t sStandard uncoated flat-parallel windows are fabricated from BK7 or UV
grade fused silica optical glass. UV grade fused silica glass windows are agood option for UV, ultrashort pulse, and high-power laser applications
due to their low sensitivity to temperature variations, relatively highdamage threshold and UV transmission down to 185 nm. BK7 glass
windows are a cost-effective choice for visible and near-infrared range,
low/mid-power laser and non-laser applications. These components
are initially uncoated and demand metallic or dielectric coatings for aparticular application. 4Lasers provide coating service upon request.
Contact us for custom solutions and pricing.

MATERIAL

BK7

UVFS

Standard uncoated flat-parallel windows are fabricated from BK7 or UV grade
fused silica optical glass. UV grade fused silica glass windows are a good
option for UV, ultrashort pulse, and high-power laser applications due to their
low sensitivity to temperature variations, relatively high damage thresholdand UV transmission down to 185 nm. BK7 glass windows are a cost-effective

M a i n fe a t u re s
Fabricated from high-quality UV grade fused silica, BK7 glasses■ Optically polished surfaces■ Available in round or rectangular shape with various thicknesses■ Custom coated and uncoated windows are available upon request

choice for visible and near-infrared range, low/mid-power laser and non-laser
applications. These components are initially uncoated and demand metallic
or dielectric coatings for a particular application. 4Lasers provide coating
service upon request. Contact us for custom solutions and pricing.

Substrates of mirrors and beamsplitters■ Isolation of different physical environments■ Beam sampling■

150

THICKNESS

SKU

PRICE

ø25,4 mm6,35 mm<λ/8@632,8 nm

6247

14 €

ø38,1 mm6,35 mm<λ/5@632,8 nm

6248

24 €

ø50,8 mm6,35 mm<λ/5@632,8 nm

6249

32 €

ø50,8 mm9,525 mm<λ/5@632,8 nm

6250

34 €

ø76,2 mm12,7 mm<λ/4@632,8 nm

6253

100 €

ø101,6 mm

12,7 mm<λ/4@632,8 nm

6254

160 €

ø12,7 mm2 mm

<λ/4@632,8 nm

6241

14 €

ø12,7 mm6 mm

<λ/8@632,8 nm

6242

14 €

ø25,4 mm2 mm

<λ/2@632,8 nm

6222

16 €

ø25,4 mm5 mm

<λ/8@632,8 nm

6223

16 €

ø38,1 mm6,35 mm<λ/5@632,8 nm

6244

30 €

ø50,8 mm6,35 mm<λ/5@632,8 nm

6245

68 €

ø50,8 mm9,525 mm<λ/4@632,8 nm

6246

74 €

ø76,2 mm12,7 mm<λ/4@632,8 nm

6251

170 €

ø101,6 mm

12,7 mm<λ/4@632,8 nm

6252

280 €

20 x 40 mm

5 mm<λ/6@632,8 nm

6243

40 €

Standard specifications■

Application examples

SURFACEFLATNESSFACE DIMENSIONSFLAT-PARALLEL WINDOWS
Substrate material

BK7, UVFS

Wavelength range

Uncoated BK7 windows: 350 nm - 2 μm
Uncoated UVFS windows: 185 nm - 2,1 μm

Clear aperture>85%

Face dimensions tolerance+0/-0,15 mm

Thickness tolerance±0,25 mm

Parallelism error<30 arcsec

Protective chamfers≤ø50,8 mm:<0,35 mm at 45°>ø50,8 mm:<0,50 mm at 45°

Surface quality≤ø25,4 mm: 10-5 S-D>ø25,4 mm: 20-10 S-D

Transmitted wavefront distortion≤ø25,4 mm:<λ/8@632,8 nm>ø25,4 mm:<λ/5@632,8 nm

Coatings

Uncoated, available upon request

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151

LASER COMPONENTS

Flat-wedge windows

S t a n d a rd p ro d u c t sWindows with a slight wedge are commonly used to prevent harmful laser
cavity feedback and beam interference effects. Standard 4Lasers uncoatedflat-wedge windows are fabricated from BK7 and UV grade fused silica
optical glass. UV grade fused silica glass flat-wedge window is a good
option for UV, ultrashort pulse and high-power laser applications becauseof a low sensitivity to temperature variations, relatively high damage
threshold and UV transmission down to 185 nm. BK7 glass window is acost-effective choice for visible and near-infrared range, low/mid-power
laser and non-laser applications.

Windows with a slight wedge are commonly used to prevent harmful laser
cavity feedback and beam interference effects. Standard 4Lasers uncoatedflat-wedge windows are fabricated from BK7 and UV grade fused silica opticalglass. UV grade fused silica glass flat-wedge window is a good option for UV,
ultrashort pulse and high-power laser applications because of a low

M a i n fe a t u re s
Fabricated from high-quality, laser grade polished UV grade fused silica,
BK7 glasses■ Standard diameters are ø12,7 mm, ø25,4 and ø50,8 mm■ Wedge angle selection from 0,5° to 3°■ Coatings, custom substrate material, dimensions are available uponrequest

152

BK7

UVFS

FACE DIMENSIONSWEDGE ANGLE

SKU

PRICE

ø12,7 mm

5 mm

THICKNESS

0,5°

6277

18 €

ø25,4 mm

3 mm

1°

6278

30 €

ø25,4 mm6,35 mm

3°

6279

30 €

ø50,8 mm6,35 mm

1°

6280

54 €

ø12,7 mm

5 mm

0,5°

6225

20 €

ø25,4 mm

3 mm

1°

6274

32 €

ø25,4 mm6,35 mm

3°

6275

32 €

ø50,8 mm6,35 mm

1°

6276

74 €

sensitivity to temperature variations, relatively high damage thresholdand UV transmission down to 185 nm. BK7 glass window is a cost-effective
choice for visible and near-infrared range, low/mid-power laser and non-laser
applications.

Standard specifications■

FLAT-WEDGE WINDOWS
Substrate material

BK7, UVFS

Wavelength range

Uncoated BK7 windows: 350 nm - 2 μm
Uncoated UVFS windows: 185 nm - 2,1 μm

Clear aperture>85%

Diameter tolerance+0/-0,15 mm

Thickness tolerance±0,25 mm

Application examples

Wedge tolerance±5 arcmin

Protection from undesirable laser cavity feedback■ Elimination of fringe pattern due to back reflections■ Variable beam steering■ Beam sampling

Protective chamfers<0,35 mm at 45°

Surface qualityø≤25,4 mm: 10-5 S-D
ø>25,4 mm: 20-10 S-D

Surface flatnessø≤25,4 mm:<λ/8@632,8 nm
ø>25,4 mm:<λ/5@632,8 nm

Coatings

Uncoated, available upon request■

MATERIAL

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153

LASER COMPONENTS

Curved windows

S t a n d a rd p ro d u c t s
Curved windows are an excellent choice as a substrate of reflective andrefractive optical elements. Commonly metallic or dielectric thin-film
coatings are applied onto the windows surfaces to be used for a particularapplication. Standard 4Lasers uncoated curved windows are fabricatedfrom UV grade fused silica glass material. UV grade fused silica glass curved
windows are a good option for UV, ultrashort pulse and high-power
laser applications because of a low sensitivity to temperature variations,relatively high damage threshold and UV transmission down to 185 nm.

Curved windows are an excellent choice as a substrate of reflective andrefractive optical elements. Commonly metallic or dielectric thin-film coatings
are applied onto the windows surfaces to be used for a particular application.
Standard 4Lasers uncoated curved windows are fabricated from UV grade
M a i n fe a t u re s
Fabricated from high-quality UVFS glass■ Plano-convex or plano-concave design■ Radii of curvature selection from -1000 mm to 1000 mm■ Coatings, custom substrate material, dimensions are available upon request

High reflectivity mirrors, output couplers in laser resonators■ Reflective and refractive optical elements in beam expanders, collimators,
reducers, telescopes
■

154

FACE
DIMENSIONS

TYPE

Plano-concave

UVFS

ø25,4 mm

Plano-convex

EDGE THICKNESS

SKU

PRICE

-50 mm6220

55 €-100 mm

6256

55 €

-200 mm

6259

55 €

-600 mm

6261

55 €

-1000 mm

6263

55 €

3,36 mm+50 mm6269

55 €

4,19 mm+100 mm

6270

55 €

4,6 mm+200 mm

6271

55 €

4,84 mm+500 mm

6272

55 €

4,92 mm+1000 mm

6273

55 €

5 mm

ROC

fused silica glass material. UV grade fused silica glass curved windows area good option for UV, ultrashort pulse and high-power laser applications
because of a low sensitivity to temperature variations, relatively high damage
threshold and UV transmission down to 185 nm.
Standard specifications■

Application examples

MATERIAL

CURVED WINDOWS
Substrate material

UVFS

Wavelength range

Uncoated UVFS windows: 185 nm - 2,1 μm

Clear aperture>85%

Diameter tolerance+0/-0,1 mm

Thickness tolerance±0,5 mm

Radius of curvature tolerance<1%

Centration error<3 arcmin

Protective chamfers<0,35 mm at 45°

Surface quality

20-10 S-D

Surface irregularity<λ/8@632,8 nm

Coatings

Uncoated, available upon request

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155

LASER COMPONENTS

Filters
Nonlinear crystals

4Lasers provide neutral density (by absorption) filters with flat
Nonlinear optical crystals are used in many different
transmission characteristics over a particular wavelength range.
nonlinear parametric applications. To mention a few, second
Also, bandpass (interference) filters, which selectively transmit
harmonic generation, difference frequency generation, opticalparticular wavelength range and eliminate out of bandDonatas
spectralRimkus
parametric amplification and other. A proper crystal has tocomponents. Custom filters are available upon request. Contact us
be chosen in order to use it for a particular application. It
for solutions and pricing.
should have: transparency in the required spectral range,adequate birefringence for phase-matching, a high nonlinear
coefficient, high optical damage threshold, and otherproperties. Contact 4Lasers team for assistance and custom
solutions.

Neutral density (byabsorption) filters

B a n d p a s s ( i n t e r fe re n c e ) f i l t e r s

C i rc u l a r v a r i a b l e n e u t r a ldensity filters

4Lasers develops and supplies different nonlinear crystals for
fundamental, applied research and industrial applications.
Available crystal growth techniques: Stepanov, Kyropoulos,
Czochralski (CZ), temperature gradient technique (TGT), flux
method.

156

sales@4Lasers.com

157

LASER COMPONENTS

Neutral density (by absorption) filters

S t a n d a rd p ro d u c t s
Neutral density (by absorption) filters are designed for a flat transmission
over a particular wavelength range and defined by the optical density(OD). Overall optical attenuation is a sum of optical absorption in neutral
density optical glass and Fresnel reflection losses. Neutral density opticalfilter densities add up when used in series.

ø25,4 mm

Neutral density (by absorption) filters are designed for a flat transmission
over a particular wavelength range and defined by the optical density (OD).
Overall optical attenuation is a sum of optical absorption in neutral density
M a i n fe a t u re s
Optical density selection from 0,1 to 4
■ ø25,4 mm standard diameter■ Excellent for low-power applications■ Custom dimensions, optical densities are available upon request
Application examples■

Overexposure prevention for cameras and other detectors

DESIGNWAVELENGTH

450-650 nm

OPTICALDENSITY

TRANSMISSION

SKU

PRICE

0,1

79%

6498

21 €

0,2

63%

6499

21 €

0,3

50%

6500

21 €

0,4

40%

6501

21 €

0,5

32%

6502

21 €

1

10%

6503

21 €

1,5

3%

6504

21 €

2

1%

6505

21 €

3

0,1%

6506

21 €

4

0,01%

6507

21 €

optical glass and Fresnel reflection losses. Neutral density optical filter
densities add up when used in series.

Standard specifications

■

158

FACE
DIMENSIONSNEUTRAL DENSITY (BY ABSORPTION) FILTERS
Material

Neutral density optical glass

Design wavelength450-650 nm

Optical density tolerance±5%

Clear aperture>85%

Face dimensions tolerance+0/-0,2 mm

Parallelism error<3 arcmin

Protective chamfers<0,35 mm at 45°

Surface quality

60-40 S-D

Surface flatness<1λ@632,8 nm

Coatings

Uncoated, available upon request

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LASER COMPONENTS

Bandpass (interference) filters

S t a n d a rd p ro d u c t s
4Lasers bandpass (interference) filters selectively transmit specific spectral
components, while eliminating the ones out of band. They are designed
to be used with collimated light and at normal angle of incidence. Eachof these filters is mounted in a black anodized aluminum mount with apropagation direction mark on it. Customization of central wavelength,
peak transmission and bandwidth is available upon request.

4Lasers bandpass (interference) filters selectively transmit specific spectral
components, while eliminating the ones out of band. They are designed to be
used with collimated light and at normal angle of incidence.
M a i n fe a t u re s
Out of band transmission <0,01%■ Central wavelength selection from 355 nm to 1064 nm■ Standard mount size is ø25,4 x 6,3 mm

Each of these filters is mounted in a black anodized aluminum mount with apropagation direction mark on it. Customization of central wavelength, peaktransmission and bandwidth is available upon request.

Fluorescence microscopy■ Spectroscopy■ Imaging
■

160

PEAK
TRANSMISSIONBANDWIDTH(FWHM)BLOCKING RANGETYPICALAPPLICATION

SKU

PRICE

355 nm

≥25%

10 nm

200-3000 nm

Nd:YAG laser line

6465

129 €

460 nm

≥65%

10 nm

200-1150 nm

Argon laser line

6466

90 €

488 nm

≥65%

10 nm

200-1150 nm

Argon laser line

6467

85 €

514,5 nm

≥65%

10 nm

200-1150 nm

Argon laser line

6468

85 €

532 nm

≥70%

10 nm

200-1150 nm

Nd:YAG laser line

6469

85 €

543,5 nm

≥70%

10 nm

200-1150 nm

HeNe laser line

6470

85 €

600 nm

≥50%

10 nm

200-1200 nm

General

6471

78 €

635 nm

≥70%

10 nm

200-1150 nm

Diode

6472

85 €

647,1 nm

≥70%

10 nm

200-1150 nm

Krypton laser line

6473

85 €

694 nm

≥70%

10 nm

200-1150 nm

Ruby laser line

6474

85 €

730 nm

≥70%

10 nm

200-1150 nm

Diode

6475

85 €

780 nm

≥70%

10 nm

200-1150 nm

Diode

6476

85 €

800 nm

≥50%

10 nm

200-1200 nm

General

6477

78 €

810 nm

≥50%

10 nm

200-1200 nm

General

6478

78 €

850 nm

≥70%

10 nm

200-1150 nm

Diode

6479

85 €

905 nm

≥70%

10 nm

200-1150 nm

Diode

6480

85 €

940 nm

≥50%

10 nm

200-1200 nm

General

6481

85 €

980 nm

≥50%

10 nm

200-1200 nm

General

6482

85 €

1064 nm

≥70%

10 nm

200-1150 nm

Nd:YAG laser line

6483

85 €

Standard specifications■

Application examples

CENTERWAVELENGTH

BANDPASS (INTERFERENCE) FILTERS
Center wavelength tolerance±2 nm

Out of band transmission<0,01%

Bandwidth tolerance±2 nm

Clear aperture>80%

Surface quality

80-50 S-D

Mount

ø25,4 x 6,3 mm black anodized aluminum mountsales@4Lasers.com

161

LASER COMPONENTS

Circular variable neutral density filters

S t a n d a rd p ro d u c t s
SUBSTRATEMATERIAL

OPERATING RANGEOUTER DIAMETERø25 mm

BK7

380-2000 nm

ø50 mmø100 mm

ø25 mmUVFS

Circular ND filters provide continuously variable, linear attenuation of lightintensity by rotating the filter around its center. Transmitted intensity varies
as a function of the optical density range. The filter can be used for naturallight and also for laser applications.
M a i n fe a t u re s
Wide operational wavelength range (250-2500 nm with UVFS substrate)■ Maintains the transmitted spectral profile

By using two filters in combination in reverse rotation can obtain a fixeddensity attenuation and extends the number applications. Sizes are available
from 25 mm to 100 mm in diameter.

■

162

Continuously variable light attenuation over a broad wavelength range

ø50 mmø100 mm

AVERAGE
TRANSMISSION IN VIS

0,04-1

90% to 10%

15676

145 €

0,04-2

90% to 1%

15677

145 €

0,04-3

90% to 0,1%

15678

145 €

0,04-1

90% to 10%

15679

170 €

0,04-2

90% to 1%

15680

170 €

0,04-3

90% to 0,1%

15681

170 €

0,04-1

90% to 10%

15682

230 €

0,04-2

90% to 1%

15683

230 €

0,04-3

90% to 0,1%

15684

230 €

0,04-1

90% to 10%

15685

185 €

0,04-2

90% to 1%

15686

185 €

0,04-3

90% to 0,1%

15687

185 €

0,04-1

90% to 10%

15688

210 €

0,04-2

90% to 1%

15689

210 €

0,04-3

90% to 0,1%

15690

210 €

0,04-1

90% to 10%

15691

270 €

0,04-2

90% to 1%

15692

270 €

0,04-3

90% to 0,1%

15693

270 €

SKU

PRICE

Standard specifications■

Application examples

250-2500 nm

OPTICAL DENSITYRANGE

CIRCULAR VARIABLE NEUTRAL DENSITY FILTERS
Substrate material

BK7 or UVFS

Operating wavelength range

380-2000 nm (BK7)250-2500 nm (UVFS)

Type

Reflective metal coated (gradient thickness metal
layer)

Calibration wavelength

532 nmInner hole diameter

8,0 mmInner hole diameter tolerance+0,15/-0,00 mm

Outside diameter tolerance+0,00/-0,15 mm

Thickness

1,75 mmSurface flatness<λ @ 632,8 nm

Surface quality

60-40 S-D

Clear aperture>90%

Coated area

0-270 deg

Parallelism<3 arcminsales@4Lasers.com

163

POLARIZATION OPTICS

Polarization
Nonlinear crystals
optics4Lasers provide
elements
manipulation
Nonlinear
opticalopticalcrystals
are usedfor
in polarization
many different
andcontrolling.
Standard
components
includequarter-wave
nonlinear parametric applications. To mention a few, second andDonatas Rimkus
half-wave generation,
three types differenceof waveplates:
zero-ordercompensated,harmonic
frequency
generation,
opticalair-spaced
crystalline
quartzwaveplates,
crystalline
quartzparametric amplification and other. A proper crystal has to andmagnesium
waveplates
for broadband
bechosen influoride
order toachromaticuse it for a particularapplication.
Itapplications
andzero-order,
monolithic
designMid-IR(MWIR,
should have: transparency in the required spectral
range,
LWIR) waveplates.
Standard
polarization optics
also nonlinear
includeadequatebirefringencefor phase-matching,a highbirefringent
andthin-film
polarizers:
Glan-typepolarizers,
coefficient, high optical damage threshold, and otherpolarizing cubes,
Brewster-type
and high-contrast
properties.
Contact
4Lasers teamthin-film
for assistanceand custom thinfilm
polarizers
for
UV,
VIS
and
NIR
applications.
solutions.
4Lasers develops and supplies different nonlinear crystals for
fundamental, applied research and industrial applications.
Available crystal growth techniques: Stepanov, Kyropoulos,
Czochralski (CZ), temperature gradient technique (TGT), flux
method.

Crystalline quartz
w a ve p l a t e s

Ac h ro m a t i c ( b ro a d b a n d )w a ve p l a t e s

M i d - i n f r a re d ( I R ) w a v e p l a t e s

Glan-type polarizers

Po l a r i z i n g c u b e s

B re w s t e r - t y p e t h i n - f i l mpolarizers

High contrast thin-film
polarizers

164

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165

POLARIZATION OPTICS

Crystalline quartz waveplates

S t a n d a rd p ro d u c t s
CLEAR APERTURE

RETARDATIONORDERFirst order

TYPE

Optically bonded

λ/2
Zero orderAir-spaced

ø18 mmFirst order

4Lasers provide mounted crystalline quartz zero-order compensated, airspaced half-wave and quarter-wave retardance waveplates designed for aparticular wavelength in the range of 257 - 1550 nm.
M a i n fe a t u re s
Zero-order compensated, air-spaced design■ True first order (FO), optically bonded on UVFS plate waveplates for highpower UV application■ Wide quarter and half waveplate selection■ Mounted in ø25,4 x 6 mm black anodized metal mount■ ø18 mm clear aperture■ Antireflective coatings (R<0,15%) on each surface■ Custom size, operating wavelength, and retardation available upon request

Air-spaced construction enables these waveplates to be used for highpower applications, while zero-order design features lower temperature andwavelength dependence compared to low and multiple order waveplates.

■

166

CRYSTALINE QUARTZ WAVEPLATES
Material

High-purity crystalline quartz

Type

Zero order (ZO) compensated, air-spaced and firstorder (FO), optically bonded for UV application

Available operating wavelength range

200 nm - 2200 nm

Typical retardation tolerance<λ/300@20 °C

Clear apertureø18 mmParallelism error<5 arcsec

Surface quality

20-10 S-D

Application examples

Transmitted wavefront distortion<λ/10@632,8 nm

Linear-to-circular polarization transformation and vice versa■ Linear polarization rotation■ Optical isolation

Coatings

Antireflective coatings (R<0,15%) on each surface

LIDT>12 J/cm2@1064 nm, 10 ns(for 1064 nm waveplates)

Mount

Mounted in ø25,4 x 6 mm black anodized metal
mount

■

λ/4
Zero orderStandard specifications

Optically bonded

Air-spaced

WAVELENGTH

SKU

PRICE

257 nm

10759

215 €

266 nm

10750

215 €

343 nm

10747

195 €

355 nm

10748

195 €

400 nm

8078

195 €

515 nm

8079

195 €

532 nm

8080

195 €

780 nm

8081

195 €

800 nm

8082

195 €

1030 nm

8083

195 €

1064 nm

8084

195 €

1550 nm

8085

195 €

257 nm

15664

215 €

266 nm

15665

215 €

343 nm

13325

195 €

355 nm

13611

195 €

400 nm

8066

195 €

515 nm

8067

195 €

532 nm

8068

195 €

780 nm

8069

195 €

800 nm

8070

195 €

1030 nm

8071

195 €

1064 nm

8072

195 €

1550 nm

8073

195 €

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167

POLARIZATION OPTICS

Achromatic (broadband) waveplates

S t a n d a rd p ro d u c t s
RETARDATIONWAVELENGTH
460-650 nm

λ/2

650-1100 nm
1000-1700 nm
460-650 nm

λ/4

650-1100 nm
1000-1700 nm

4Lasers provide mounted achromatic (broadband) half-wave and quarterwave retardance waveplates for several bands in the wavelength range of
460 nm - 1700 nm. Air-spaced construction enables to use these waveplates
M a i n fe a t u re s
Air-spaced design■ Mounted in ø25,4 x 6 mm black anodized metal mount■ ø12 mm and ø18 mm clear aperture selection■ Broadband antireflective coatings (R<0,5%) on each surface■ Custom size, operating wavelength range and retardation available uponrequest

168

SKU

PRICE

ø12 mm

8107

395 €

ø18 mm

8109

595 €

ø12 mm

8111

395 €

ø18 mm

8113

595 €

ø12 mm

8115

395 €

ø18 mm

8117

595 €

ø12 mm

8106

395 €

ø18 mm

8108

595 €

ø12 mm

8110

395 €

ø18 mm

8112

595 €

ø12 mm

8114

395 €

ø18 mm

8116

595 €

for high-power applications. These waveplates are ideal for multiple
wavelengths and broadband operation, due to their constant retardance overa particular broad wavelength range.
Standard specifications■

ACHROMATIC (BROADBAND) WAVEPLATES
Material

High-purity crystalline quartz and magnesium
fluorideType

Air-spaced

Retardation tolerance<λ/100@20 °C

Parallelism error<5 arcsec

Surface quality

40-20 S-D

Application examples

Transmitted wavefront distortion<λ/8@632,8 nm

Linear-to-circular polarization transformation and vice versa■ Linear polarization rotation■ Optical isolation

Coatings

BBAR(R<0,5%) on each surface

Laser induced damage threshold>8 J/cm2@1064 nm, 10 ns(for 650-1100 nm waveplates)

Mount

Mounted in ø25,4 x 6 mm black anodized metal
mount

■

CLEAR APERTURE

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169

POLARIZATION OPTICS

Mid-infrared (IR) waveplates

S t a n d a rd p ro d u c t s
CLEAR APERTURE

RETARDATIONCOATINGS

AR coated
λ/2

Uncoated

4Lasers provide unique zero-order, monolithic design mid-infrared (MWIRand LWIR) waveplates mounted in ø25,4 x 6 mm black anodized metal
mount for the range of 3500 nm - 10600 nm. These waveplates are available
with quarter-wave, half-wave or any other custom retardance. Each MWIR
M a i n fe a t u re s
Zero-order, monolithic design■ Operating wavelength selection from 3500 nm to 10600 nm■ Mounted in ø25,4 x 6 mm black anodized metal mount■ ø10 mm clear aperture■ Custom size, operating wavelength available upon request

and LWIR waveplates designed for a particular wavelength in the range
from 3500 nm to 9500 nm are antireflective coated, while each 10000 nm 10600 nm waveplates are uncoated.

Application examples
Linear-to-circular polarization transformation and vice versa
Linear polarization rotation■ Optical isolation
■
■

170

AR coatedStandard specifications■

ø10 mmλ/4MID-IR WAVEPLATESWAVELENGTH

SKU

PRICE

3500 nm

8175

455 €

4000 nm

8177

455 €

4500 nm

8179

455 €

5000 nm

8181

455 €

5500 nm

8183

455 €

6000 nm

8185

455 €

6500 nm

8187

455 €

7000 nm

8189

455 €

7500 nm

8191

940 €

8000 nm

8193

940 €

8500 nm

8195

940 €

9000 nm

8197

940 €

9500 nm

8199

940 €

10000 nm

8201

760 €

10600 nm

8203

760 €

3500 nm

8174

455 €

4000 nm

8176

455 €

4500 nm

8178

455 €

5000 nm

8180

455 €

5500 nm

8182

455 €

6000 nm

8184

455 €

6500 nm

8186

455 €

7000 nm

8188

455 €

7500 nm

8190

940 €

Type

Zero-order, monolithic

8000 nm

8192

940 €

Available operating wavelength range

3000 nm - 10600 nm

8500 nm

8194

940 €

Retardation tolerance<λ/50@20 °C

9000 nm

8196

940 €

Clear apertureø10 mm9500 nm

8198

940 €

Parallelism error<1 arcmin

10000 nm

8200

760 €

Surface quality

60-40 S-D

10600 nm

8202

760 €

Coatings

Antireflective coating (R<1%)on each surface or uncoatedLaser induced damage threshold

2 J/cm2@ 9000 nm, 10 ns (for 9000nm waveplates)

Mount

Mounted in ø25,4 x 6 mm black anodized metal
mount

Uncoatedsales@4Lasers.com

171

POLARIZATION OPTICS

Glan-type polarizers

S t a n d a rd p ro d u c t s
MATERIAL

WAVELENGTH
RANGE

TYPE

Glan-Laser
Calcite350-2300 nm
Glan-Taylor

Output ray (extraordinary)

Input rayGlan-Laser
Escape ray (ordinary)

YVO4

500-4000 nm
Glan-Taylor

200-300 nm

4Lasers provide air-spaced Glan-Taylor and Glan-laser type polarizers
fabricated from α -BBO (UV), calcite (VIS to NIR), YVO4 (VIS to Mid-IR)
birefringent crystalline material and mounted in a barrel-type black anodized
aluminum mount. Glan-type polarizers are constructed to transmit only the
extra-ordinary polarized beam, while ordinary polarized beam is deflected.
These polarizers feature an extremely high extinction ratio over a wide
wavelength range and their common applications include polarization

separation, polarization cleaning, power attenuation. Glan-Taylor polarizers
are designed for low and mid-power applications, while Glan-Lasers – forhigh-power regime due to their higher damage threshold and escapewindow in housing for deflected ordinary polarized beam. Single MgF2 layer
is applied onto Glan-type polarizer optical surfaces in order to noticeably
maximize their broadband transmission.

Glan-Laser
300-700 nm
α-BBO
200-300 nm
Glan-Taylor
300-700 nm

M a i n fe a t u re s
Substrate material: α-BBO, calcite and YVO4
Extremely high extinction ratio over a wide wavelength range■ Air-spaced configuration■ Minor transmitted beam displacement and deviation■ Single MgF coating layer on every optical face for optimized broadband
2transmission■ Customization available upon request■■

Application examples
Optical isolation
Polarization separation■ Polarization cleaning■ Laser power attenuation
■
■

172

MOUNT
DIAMETER

CLEAR
APERTURE

MOUNTLENGTHSKU

PRICE

ø15 mm

6 mm

21 mm

7425

325 €

ø25,4 mm

8 mm

25 mm

7426

375 €

ø25,4 mm

10 mm

26 mm

7427

430 €

ø15 mm

6 mm

21 mm

7413

325 €

ø25,4 mm

8 mm

25 mm

7414

375 €

ø25,4 mm

10 mm

26 mm

7415

430 €

ø15 mm

6 mm

16 mm

7428

435 €

ø25,4 mm

8 mm

19 mm

7429

490 €

ø25,4 mm

10 mm

22 mm

7430

570 €

ø15 mm

6 mm

16 mm

7416

435 €

ø25,4 mm

8 mm

19 mm

7417

490 €

ø25,4 mm

10 mm

22 mm

7418

570 €

ø15 mm

6 mm

29 mm

7419

435 €

ø25,4 mm

8 mm

31 mm

7420

490 €

ø25,4 mm

10 mm

31 mm

7421

570 €

ø15 mm

6 mm

25 mm

7422

435 €

ø25,4 mm

8 mm

25 mm

7423

490 €

ø25,4 mm

10 mm

26 mm

7424

570 €

ø15 mm

6 mm

29 mm

7407

395 €

ø25,4 mm

8 mm

31 mm

7408

450 €

ø25,4 mm

10 mm

31 mm

7409

510 €

ø15 mm

6 mm

25 mm

7410

395 €

ø25,4 mm

8 mm

25 mm

7411

450 €

ø25,4 mm

10 mm

26 mm

7412

510 €

Standard specifications
Extinction ratio (transmitted beam)

α -BBO and YVO4 polarizers: <5 x 10-6
Calcite polarizers: <5 x 10-5

Beam deviation<3 arcmin

Length tolerance±0,1 mm

Parallelism error<1 arcmin

Surface quality

20-10 S-D

Surface flatness<λ/4@632.8 nm

Coatings

Single MgF2 layer

LIDT

Glan-Taylor polarizers:>200 MW/cm2 @1064 nm, 10 ns
Glan-laser polarizers:>500 MW/cm2 @1064 nm, 10 ns

Mount

Black anodized aluminum barrel-type mountsales@4Lasers.com

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POLARIZATION OPTICS

Polarizing cubes

S t a n d a rd p ro d u c t s
TYPE

Epoxy glued

APPLICATION

Low and mid-power

TRANSMISSION(P-POL)

TRANSMISSION(S-POL)WAVELENGTH
RANGE

>92%

<0,2%

400-700 nm

>96%

>96%

Optically contacted

High-power

>92%

<0,1%

<0,1%

<0,15%

345-360 nm

510-535 nm

650-900 nm

1025-1080 nm

4Lasers unmounted polarizing cubes are fabricated from two identicalright-angle prisms with their hypotenuse faces adhered together via opticalcontact or epoxy glue. Polarized cubes are designed to transmit p-polarized
light with minor deviation (<3 arcmin) and deflect s-polarized light by 90°
angle. Prior to cementing polarizing dielectric thin-film coating is applied
onto one of the prisms hypotenuse face, while input and exit surfaces are

M a i n fe a t u re s
Optically contacted or epoxy glued configurations available■ Minor transmitted beam deviation (<3 arcmin)■ Antireflective coated input and output faces

antireflective coated for particular wavelength range. 4Lasers opticallycontacted polarizing cubes provide higher laser induced damage threshold,therefore are primarily used for high-power applications, while epoxy glued
cubes are a cost-effective choice for low and mid-power applications. We
recommend to use these elements with collimated laser beams in order toavoid beam aberrations.

Beam separation and combining by polarization■ Polarization separation
■

174

<0,1%
1520-1570 nm

SKU

PRICE

6,35 x 6,35 x 6,35 mm

7442

95 €

12,7 x 12,7 x 12,7 mm

7443

115 €

25,4 x 25,4 x 25,4 mm

7444

140 €

6,35 x 6,35 x 6,35 mm

7439

130 €

12,7 x 12,7 x 12,7 mm

7440

245 €

25,4 x 25,4 x 25,4 mm

7441

395 €

6,35 x 6,35 x 6,35 mm

7445

130 €

12,7 x 12,7 x 12,7 mm

7446

245 €

25,4 x 25,4 x 25,4 mm

7447

395 €

6,35 x 6,35 x 6,35 mm

7448

150 €

12,7 x 12,7 x 12,7 mm

7449

270 €

25,4 x 25,4 x 25,4 mm

7450

430 €

6,35 x 6,35 x 6,35 mm

7451

130 €

12,7 x 12,7 x 12,7 mm

7452

245 €

25,4 x 25,4 x 25,4 mm

7453

395 €

6,35 x 6,35 x 6,35 mm

7454

145 €

12,7 x 12,7 x 12,7 mm

7455

260 €

25,4 x 25,4 x 25,4 mm

7456

410 €

Standard specifications■

Application examples>96%

DIMENSIONSPOLARIZING CUBES
Beam deviation<3 arcmin

Clear aperture>85%

Face dimensions tolerance+0/-0,2 mm

Thickness tolerance±0,25 mmProtective chamfers<0,35 mm at 45°

Coatings

Hypotenuse face: polarization beamsplitting coating
Input and output faces: antireflective coatings

Surface quality

40-20 S-D

Surface flatness<λ/4@632,8 nm

Laser induced damage threshold>15 J/cm2@1064 nm, 10 ns(for 1025-1080 nm optically contacted cubes)>0,1 J/cm2@532 nm, 10 ns(for 400-700 nm epoxy glued cubes)

Mount

Unmounted, available upon request

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175

POLARIZATION OPTICS

Brewster-type thin-film polarizers

S t a n d a rd p ro d u c t s
FACE DIMENSIONS

10 x 20 mm

20 x 40 mm

4Lasers standard Brewster-type thin-film polarizers are designed for
applications, which include polarization separation. These elements provide amoderately extinction ratio Tp:Ts > 200:1 and are perfectly fit for high-power
M a i n fe a t u re s
Substrates fabricated from high-quality UV grade fused silica opticalglass■ Designed for most popular laser line and harmonic wavelengths■ Angle of incidence: Brewster-angle■ Typical extinction ratio Tp:Ts > 200:1■ Custom dimensions, operating wavelength available upon request

Polarization separation
Optical isolation■ Polarization cleaning■ Laser power attenuation
■

5 mm

>95%

>95%

TRANSMISSION(S-POL)AOIWAVELENGTH

SKU

PRICE

<1%

55,4°

266 nm

9375

110 €

<0,5%

55,4°

343 nm

9376

80 €

<0,5%

55,4°

355 nm

9377

80 €

<0,5%

55,4°

515 nm

9378

80 €

<0,5%

55,4°

532 nm

9379

80 €

<0,5%

55,4°

1030 nm

9380

80 €

<0,5%

55,4°

1064 nm

9381

80 €

<1%

55,4°

266 nm

9368

275 €

<0,5%

55,4°

343 nm

9369

135 €

<0,5%

55,4°

355 nm

9370

135 €

<0,5%

55,4°

515 nm

9371

135 €

<0,5%

55,4°

532 nm

9372

135 €

<0,5%

55,4°

1030 nm

9373

135 €

<0,5%

55,4°

1064 nm

9374

135 €

Standard specification
BREWSTER TYPE THIN-FILM POLARIZERS
Material

UVFS

Clear aperture>85%

Face dimensions tolerance+0,0/-0,15 mm

Thickness tolerance± 0,25 mm

Parallelism error<30 arcsec

Protective chamfers<0,35 mm at 45˚Surface quality

20-10 S-D

Surface flatness<λ/8@632,8 nm for 10x20 mm;<λ/6@632,8 nm for 20 x 40 mm

Transmitted wavefront distortion<λ/10@632,8 nm for 10x20 mm;<λ/6@632,8 nm for 20 x 40 mm

Laser induced damage threshold>10 J/cm2@1064 nm, 10 ns (for 1064 nm polarizers)

Mount

Unmounted, available upon request

■

176

5 mm

TRANSMISSION(P-POL)and UV applications. 4Lasers design and manufacture standard and custom
Brewster type polarizers in the range of 230 nm and 2000 nm with facedimensions up to 160 mm.

■

Application examples

THICKNESS

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POLARIZATION OPTICS

High-contrast thin-film polarizers

S t a n d a rd p ro d u c t s
FACE
DIMENSIONSTHICKNESS

20 x 15 mm

6 mm

10 x 20 mm

20 x 15 mm

4Lasers standard high contrast Brewster-type and 45° thin-film polarizers
provide high extinction ratio Tp:Ts > 1000:1 thanks to the ion beam sputtered(IBS) thin-film coatings. Moreover, these polarizers are ideal for high-power
levels and UV wavelength range. 4Lasers design and manufacture standard
M a i n fe a t u re s
Substrates fabricated from high-quality UV grade fused silica optical glass■ Designed for most popular laser line and harmonic wavelengths■ Brewster and 45° angle of incidence selection■ Typical extinction ratio Tp:Ts > 1000:1■ Custom dimensions, operating wavelength available upon request

and custom Brewster type high contrast polarizers for the wavelength range
between 230 nm and 2000 nm with face dimensions up to 160 mm.

Polarization separation■ Optical isolation■ Polarization cleaning■ Laser power attenuation
■

178

6 mm

5 mm

TRANSMISSION(P-POL)

TRANSMISSION(S-POL)532 nm

>98%

<0,2%

1030 nm

>98%

<0,2%

1064 nm>98%

343 nm

AOI

SKU

PRICE

45°

9192

245 €

45°

9194

245 €

<0,2%

45°

9196

245 €

>96%

<0,2%

55,4°

9185

105 €

355 nm

>96%

<0,2%

55,4°

9186

105 €

515 nm

>99%

<0,1%

55,4°

9187

105 €

532 nm

>99%

<0,1%

55,4°

9188

105 €

1030 nm

>99%

<0,1%

55,4°

9189

105 €

1064 nm

>99%

<0,1%

55,4°

9190

105 €

355 nm

>96%

<0,2%

55,4°

9191

205 €

532 nm

>99%

<0,1%

55,4°

9193

205 €

1030 nm

>99%

<0,1%

55,4°

9195

205 €

1064 nm

>99%

<0,1%

55,4°

9197

205 €

343 nm

>96%

<0,2%

55,4°

9179

205 €

355 nm

>96%

<0,2%

55,4°

9180

205 €

515 nm

>99%

<0,1%

55,4°

9181

205 €

532 nm

>99%

<0,1%

55,4°

9182

205 €

1030 nm

>99%

<0,1%

55,4°

9183

205 €

1064 nm

>99%

<0,1%

55,4°

9184

205 €

Standard specifications■

Application examples

20 x 40 mm

5 mm

WAVELENGTHHIGH CONTRAST THIN-FILM POLARIZERS
Material

UVFS

Clear aperture>85%

Face dimensions tolerance+0/0,15 mm

Thickness tolerance± 0,25 mm

Parallelism error<30 arcsec

Protective chamfers<0,35 mm at 45˚Surface quality

20-10 S-D

Surface flatness<λ/2@632,8 nm for 10x20 mm;<λ/2@632,8 nm for 20x40 mm

Transmitted wavefront distortion<λ/10@632,8 nm for 10x20 mm;<λ/6@632,8 nm for 20 x 40 mm

Laser induced damage threshold>12 J/cm2@1064 nm, 10 ns (for 1064 nm polarizer)

Mount

Unmounted

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179

BEAM DELIVERY DEVICES

Beam
deliverydevicesNonlinear
crystals

4Lasers designs and manufactures compact laser beam
Nonlinear optical crystals are used in many different
delivery systems, laser beam expanders, reducers, divergence
nonlinear parametric applications. To mention a few, second
Donatas Rimkus
compensators and laser power attenuators, which are usedharmonic generation, difference frequency generation, opticalto increase or decrease laser beam diameter, control beam
parametric amplification and other. A proper crystal has todivergence, and adjust laser power.
be chosen in order to use it for a particular application. Itshould have: transparency in the required spectral range,adequate birefringence for phase-matching, a high nonlinear
coefficient, high optical damage threshold, and otherproperties. Contact 4Lasers team for assistance and custom
solutions.

Co m p a c t m o t o r i z e dbeam expanders MEX

H i g h - p o we r m o t o r i z e db e a m e x p a n d e r s M E X- H P

Va r i a b l e l a s e r b e a m e x p a n d e r s
a n d re d u c e r s V E X

Fi xe d r a t i o l a s e r b e a m
expanders FEX

M o t o r i z e d l a s e r p o we r
a t t e n u a t o r s L PA

Ad v a n c e d m o t o r i z e d l a s e r
p o w e r a t t e n u a t o r s L PA - A

M a n u a l l a s e r p o we r
a t t e n u a t o r s L PA - M

Manual 4 axis translation
stage

4Lasers develops and supplies different nonlinear crystals for
fundamental, applied research and industrial applications.
Available crystal growth techniques: Stepanov, Kyropoulos,
Czochralski (CZ), temperature gradient technique (TGT), flux
method.

180

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181

BEAM DELIVERY DEVICES

Compact motorized beam expanders MEX

S t a n d a rd p ro d u c t s
ITEM
MODEL

MEX13

MEX18

Motorized laser beam expanders MEX series are used to increase the laser
beam diameter and adjust divergence. Standard or custom-made beam
expanders feature a unique mechanical closed loop sliding-lens design
ensuring high pointing stability and minimal dimensions.
M a i n fe a t u re sHighest beam pointing stability (< 0,1 mrad)
All-in-one design with integrated controller■ Two lens simultaneous movement assuring no misfocus■ Absolute encoder (both lenses)■ Adjustment time <1s (all magnifications)■ Fused silica optical elements■ No homing after switching on/off■ Diffraction limited performance for all magnifications
Application examples
Precise laser micromachining
Life sciences■ Research■

1,0x - 3,0x continuous

1,0x - 8,0x continuous

CLEAR INPUTAPERTURE

11,5 mm11,5 mm

CLEAR OUTPUT
APERTURE

RECOMMENDED MAX. INPUTBEAM SIZE, 1/E2

ø7 mm - 1x
ø6 mm - 3x

23 mm

ø7 mm - 1x
ø5 mm - 5x
ø3 mm - 8x

38 mm

Standard specifications

DIMENSIONS(H X W X L)

45 x 45 x 140 mm

45 x 45 x 237 mm

These variable magnification (zoom) beam expanders and reducers aredesigned for required wavelength and each type of our beam expanders
have motorized divergence adjustability.

■■

EXPANSION

POINTING
STABILITY

SKU

PRICE

343-355 nm< 0,2 mrad

6857

2800 €

343-355 nm< 0,5 mrad

6838

2600 €

515-532 nm< 0,2 mrad

6856

2600 €

515-532 nm< 0,5 mrad

6833

2400 €

1030-1064 nm< 0,5 mrad

6825

2400 €

1030-1064 nm< 0,2 mrad

6855

2600 €

343-355 + 515-532 nm< 0,2 mrad

6928

2900 €

343-355 + 515-532 nm< 0,5 mrad

6131

2700 €

515-532 + 1030-1064 nm< 0,5 mrad

6836

2600 €

515-532 + 1030-1064 nm< 0,2 mrad

6927

2800 €

343-355 nm< 0,5 mrad

6121

2800 €

350-800 nm< 0,5 mrad

9235

3400 €

515-532 nm< 0,5 mrad

6842

2600 €

1030-1064 nm< 0,5 mrad

6841

2600 €

343-355 + 515-532 nm< 0,5 mrad

6844

2900 €

515-532 + 1030-1064 nm< 0,5 mrad

6843

2800 €WAVELENGTH

M o u n t i n g o p t i o n s fo r m o t o r i z e d b e a m e x p a n d e r s M E X

MOTORIZED BEAM EXPANDERS SPECIFICATIONS
Adjustment

Motorized

Divergence

Adjustable

Clear input aperture

11,5 mmLens material

UVFS

Transmission>97%

Controller

Integrated

Control interface

USB or RS232

Housing material

Black anodized aluminum

LIDT

3 J/cm2 (10 ns @ 355nm)
5 J/cm2 (10 ns @ 532 nm)
10 J/cm2 (10 ns @ 1064 nm)

MOUNTING OPTION
Manual 4 axis translation stage MSTAGE

FOR BEAM HEIGHT OF

SKU

PRICE

27 mm (±2 mm travel)

12571

580 €

■

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*Custom design available

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BEAM DELIVERY DEVICES

High-power motorized beam expanders MEX-HP

S t a n d a rd p ro d u c t s
ITEM MODEL

MEX13-HP

MEX15-HP

High power motorized laser beam expanders MEX series are used to increase
the laser beam diameter and adjust divergence. The optical design isdedicated for high power ultrafast femtosecond laser applications.
These magnification (zoom) beam expanders are designed for required
M a i n fe a t u re s
High power optical design (up to 200 W @ 1030 nm, 500 fs, 1 Mhz)
No internal reflections on optical elements■ Highest beam pointing stability < 0,2 mrad
■ All-in-one design with an integrated controller■ Two lens simultaneous movement assuring no misfocus■ Absolute encoder (both lenses)■ Fused silica optical elements■ Diffraction limited performance for all magnifications
Application examples
Precise laser micromachining
High power laser beam management■ Research■

1,0x - 3,0x continuous

1,0x - 5,0x continuous

CLEAR INPUTAPERTURE

11,5 mm11,5 mm

CLEAR
OUTPUT
APERTURE

28 mm

24 mm

RECOMMENDED MAX. INPUTBEAM SIZE, 1/E2

ø7 mm - 1x
ø6 mm - 3x

ø7 mm - 1x
ø3,3 mm - 5x

DIMENSIONS(H X W X L)

60 x 60 x 207 mm

65 x 65 x 250 nm

POINTING
STABILITY

SKU

PRICE

343-355 nm< 0,5 mrad

9242

3300 €

343-355 nm< 0,2 mrad

9243

3500 €

515-532 nm< 0,5 mrad

9240

3100 €

515-532 nm< 0,2 mrad

9241

3300 €

1030-1064 nm< 0,5 mrad

9238

3100 €

1030-1064 nm< 0,2 mrad

9239

3300 €

343-355 + 515-532 nm< 0,5 mrad

9246

3400 €

343-355 + 515-532 nm< 0,2 mrad

9247

3600 €

515-532 + 1030-1064 nm< 0,5 mrad

9244

3300 €

515-532 + 1030-1064 nm< 0,2 mrad

9245

3500 €

343-355 nm< 0,5 mrad

9252

3600 €

515-532 nm< 0,5 mrad

9250

3400 €

1030-1064 nm< 0,5 mrad

9248

3400 €

343-355 + 515-532 nm< 0,5 mrad

9256

3700 €

515-532 + 1030-1064 nm< 0,5 mrad

9254

3600 €WAVELENGTH

wavelength and each type of our beam expanders has motorized divergence
adjustability. Standard or custom-made beam expanders feature a uniquemechanical closed loop sliding-lens design ensuring high pointing stability
and minimal dimensions.
Standard specifications■■

EXPANSION

M o u n t i n g o p t i o n s fo r h i g h - p o we r m o t o r i z e d b e a m e x p a n d e r s M E X- H P

HIGH POWER MOTORIZED LASER BEAM EXPANDERS SPECIFICATIONS
Adjustment

Motorized

Divergence

Adjustable

Lens material

UVFS

Transmission>97% (MEX13-HP), >95% (MEX15-HP)

Control interface

USB or RS232

Controller

Integrated

Housing material

Black anodized aluminum

Max. laser power

Up to 200 W @ 1030 nm, 500 fs, 1 MHz

LIDT

3 J/cm2 (10 ns @ 355nm)
5 J/cm2 (10 ns @ 532 nm)
10 J/cm2 (10 ns @ 1064 nm)

MOUNTING OPTION
Manual 4 axis translation stage MSTAGE-HP(Additional adapter included)

FOR BEAM HEIGHT OF
27 mm (±2 mm travel)

SKU

PRICE

12571

580 €

■

184

*Custom design available

sales@4Lasers.com

185

BEAM DELIVERY DEVICES

Variable beam expanders VEX and reducers VRE

S t a n d a rd p ro d u c t s
ITEM
MODEL

VEX13

VEX18

VEX15-HP

VRE13

4Lasers introduces variable manual beam expanders VEX series used toincrease or decrease the laser beam diameter. Standard or custom-madelaser beam expanders for the UV, visible, and NIR spectral ranges feature aunique mechanical sliding-lens design, ensuring a high pointing stability andminimal dimensions. These variable magnification (zoom) beam expanders
are designed for the required wavelength and each type of our beamM a i n fe a t u re sHighest beam pointing stability (< 0.5 mrad)■ Fused silica optical elements■ Grease free mechanical design■ Sliding lens design■ Diffraction limited performance for all magnifications

Laser micromachining■ Research■

186

1,0x - 3,0x continuous

1,0x - 8,0x continuous

1,0x - 5,0x continuous

0,33x - 1,0x continuous

CLEAR
INPUT
APERTURE

11 mm

11 mm

11 mm

22 mm

CLEAR
RECOMMENDED MAX.
OUTPUTINPUT BEAM SIZE, 1/E2
APERTURE

23,5 mm

40 mm

24 mm

11 mm

ø7 mm - 1x
ø5 mm - 3x

ø7 mm - 1x
ø5,3 mm - 5x
ø3,3 mm - 8x
ø7 mm - 1x
ø3,3 mm - 5x
ø15 mm - 0,33x
ø7 mm - 1x

DESIGN

Standard

Standard

High power

Standard

DIMENSIONSMOUNTING OPTIONS

ø42 x 110 mm

M30x1 external, SM1
internal, ø38,1 mm [1,5”],T-mount (M42x0,75)

ø53 x 203 mm

ø58 x 250 mm

ø42 x 110 mm

SM2, ø50,8 mm [2’]T-mount, SM2,
ø50,8 mm [2”]M30x1 external, SM1
internal, ø38,1 mm [1,5”],T-mount (M42x0,75)

expanders have divergence adjustability.
All optical elements of beam expanders are made of fused silica with high
LIDT coatings and provide stable and reliable performance even when using
them with high power lasers. Large input and output apertures allow the
optical beam expanders to produce diffraction limited expanded (or reduced)
beams for a wide range of input beams.

Standard specifications■

Application examples

EXPANSIONWAVELENGTH

SKU

PRICE

343-355 nm

4357

1180 €

515-532 nm

6987

980 €

1030-1064 nm

6985

980 €

343-355 + 515-532 nm

6991

1180 €

515-532 + 1030-1064 nm

6990

1180 €

343-355 nm

6455

1390 €

515-532 nm

6725

1190 €

1030-1064 nm

6992

1190 €

343-355 + 515-532 nm

6456

1390 €

515-532 + 1030-1064 nm

6994

1390 €

343-355 + 515-532 nm

9279

1690 €

515-532 + 1030-1064 nm

9273

1690 €

343-355 nm

6997

1180 €

515-532 nm

6995

980 €

343-355 + 515-532 nm

7000

1180 €

515-532 + 1030-1064 nm

6999

1180 €

M o u n t i n g o p t i o n s fo r v a r i a b l e b e a m e x p a n d e r s V E X
SKU

PRICE

Adjustment

VARIABLE BEAM EXPANDERS AND REDUCERS SPECIFICATIONSManualFixed post mounting set

MOUNTING OPTION

100-125 mm (4” – 5”)

FOR BEAM HEIGHT OF

9336

60 €

Divergence

Adjustable

Fixed post mounting set

76,2 mm (3”)

9337

55 €

Pointing stability< 0,5 mrad, < 1 mrad (VEX15-HP)

X-Y adjustable (3 adjusters) kinematic mount with post holder, D50,8mm option

76,2 mm (3”)

9348

160 €

Lens material

UVFS

X-Y adjustable (3 adjusters) kinematic mount with post holder, SM2 option

76,2 mm (3”)

9349

170 €

Transmission>97%, >95% (VEX15-HP)

X-Y adjustable (3 adjusters) kinematic mount with post holder, D50,8mm option

100-125 mm (4” – 5”)

9350

165 €

LIDT

3 J/cm2 (10 ns @ 355nm)
5 J/cm2 (10 ns @ 532 nm)
10 J/cm2 (10 ns @ 1064 nm)

X-Y adjustable (3 adjusters) kinematic mount with post holder, SM2 option

100-125 mm (4” – 5”)

9351

175 €

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187

BEAM DELIVERY DEVICES

Fixed ratio beam expanders FEX

S t a n d a rd p ro d u c t s
ITEM MODEL

FEX-2

FEX-3

FEX-4

FEX-5

Fixed ratio beam expanders FEX series are used to increase the laser beam
diameter. The FEX model diversity cover the UV, visible and NIR spectral
ranges.
These compact beam expanders are designed for required wavelength andhave divergence adjustability.

M a i n fe a t u re s
Divergence adjustment■ Galilean optical design■ UVFS optical elements■ Grease free mechanical design■ Wide wavelength adoption - 200 nm to 2 µm

All optical elements of beam expanders are made of fused silica with high
LIDT coatings and provide a stable and reliable performance even using themwith high power lasers.

Standard specifications■

Application examples
Laser material processing
Medical■ Research
■

188

2x

3x

4x

5x

8x

CLEAR INPUTAPERTURE

11,5 mm11,5 mm11,5 mm11,5 mm

7 mm

RECOMMENDED
MAX. INPUT BEAM
SIZE, 1/E2

ø7 mm

ø5,3 mm

ø4 mm

ø3,2 mmø2 mm

CLEAR OUTPUT
APERTURE

23 mm

MECHANICALLENGTH

65 mm

23 mm

65 mm

23 mm

90 mm

23 mm

95 mm

23 mm

104 mmWAVELENGTH

SKU

PRICE

343-355 nm

7723

199 €

515-532 nm

7725

189 €

1030-1064 nm

7727

189 €

1030-1064 + 515-532 nm

11169

229 €

343-355 nm

7733

199 €

515-532 nm

7731

189 €

1030-1064 nm

7729

189 €

1030-1064 + 515-532 nm

11170

229 €

343-355 nm

7735

199 €

515-532 nm

7737

189 €

1030-1064 nm

7739

189 €

1030-1064 + 515-532 nm

11171

229 €

343-355 nm

7741

199 €

515-532 nm

7743

189 €

1030-1064 nm

7746

189 €

1030-1064 + 515-532 nm

11172

229 €

343-355 nm

7749

209 €

515-532 nm

7752

199 €

1030-1064 nm

7754

199 €

1030-1064 + 515-532 nm

11173

239 €

M o u n t i n g a c c e s s o r i e s fo r f i xe d r a t i o b e a m e x p a n d e r s F E X

FIXED RATIO BEAM EXPANDER SPECIFICATIONS
Clear output aperture

23 mm

Divergence

Adjustable

Outer Diameter

30 mm

Mounting options

SM1 (male, female), ø30 mm

Transmission

>98%

LIDT

3 J/cm2 (10 ns @ 355nm)
5 J/cm2 (10 ns @ 532 nm)
10 J/cm2 (10 ns @ 1064 nm)

■

FEX-8

EXPANSION

FOR BEAMHEIGHT OF

RECOMMENDED ACCESSORY

SKU

PRICE

Adapter SM1 male to M30 X 1 male

-

9338

24 €

Adapter SM1 female to C-mount

-

9339

24 €

Adapter SM1 female to M30 X 1 male

-

9340

24 €

X-Y adjustable (3 adjusters) kinematic mount withpost holder

50,8 mm (2”)

9341

135 €

X-Y adjustable (3 adjusters) kinematic mount withpost holder

76,2 - 100 mm(3” – 4”)

9342

140 €

*Custom design available

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BEAM DELIVERY DEVICES

Motorized laser power attenuators LPA

S t a n d a rd p ro d u c t s
ATTENUATION
RANGE

LIDT

0,5 - 95 %2 J/cm2 (10 ns @ 266 nm)

0,2 - 96 %3 J/cm2 (10 ns @ 355nm)
5 J/cm2 (10 ns @ 532 nm)

0,1 - 98 %10 J/cm2 (10 ns @ 1064 nm)

4Lasers designs and manufactures motorized laser power attenuatorsfor laser power control.
LPA could be produced for use in the UV, visible, and NIR spectral ranges from
250 nm to 2000 nm. These devices feature a large clear aperture dedicated forconsiderable beam application.
All optical elements of these laser power attenuators are made for high LIDT

M a i n fe a t u re s
Robust design
Damage threshold up to 10J/cm2 (10 ns @ 1064 nm)■ Adjustable polarizer angle ±2 deg■ Clear aperture 18 mm■ External controller included■ Intuitive software■ 175,543 steps in full rotation■ ± 0,05 % laser power accuracy■ Adjustment time <0,2 sec (min to max)

SKU

PRICE

257 nm9326

1520 €

266 nm9327

1520 €

343 nm9264

1390 €

355 nm

9263

1390 €

515 nm9262

1280 €

532 nm9260

1280 €

1030 nm

9259

1280 €

1064 nm

9258

1280 €and provide a stable and reliable performance even when using them withhigh power lasers in industrial applications.
Secondary laser beam from the laser power attenuator unit is rejected out
through the output window to an external beam dump (optional) in order toavoid any thermal effects or stress in the housing of the LPA device. Exit laser
beam has a 2,25 mm beam offset.

Ac c e s s o r i e s fo r l a s e r p o we r a t t e n u a t o r s L PA

Standard specifications■■

WAVELENGTH

MOTORIZED LASER POWER ATTENUATOR SPECIFICATIONSRECOMMENDEDACCESSORY

FOR BEAM HEIGHT OF

SKU

PRICE

Input and output clear aperture

18 mm

Dimensions (H x W x L)

58 x 36 x 74,5 mm | 58 x 51,5 x 74,5 mm with beam
dump

Post mounting set

50 mm or 76 mm (2” or 3”)

9343

35 €

Post mounting set

73 – 125 mm (2,9” – 5”)

9344

40 €

Control interface

USB and RS232

Controller

External

Dedicated beam dumpwith protective window

-

9345

115 €

*Custom design available

Application examples
Laser machining
Research■ Laser power control and attenuation
■
■

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BEAM DELIVERY DEVICES

Advanced motorized laser power attenuators LPA-A

S t a n d a rd p ro d u c t s
ATTENUATION
RANGE
0,5 - 95 %LIDT
2 J/cm2 (10 ns @ 266 nm)
5 J/cm2 (10 ns @ 532 nm)

0,2 - 96 %2

3 J/cm (10 ns @ 355nm)
2

5 J/cm (10 ns @ 532 nm)
0,1 - 98 %2

10 J/cm (10 ns @ 1064 nm)

Advanced laser power attenuator LPA-A is a compact motorized device forlaser power control with an integrated controller and absolute encoder. The
LPA-A is produced in the UV, visible and NIR spectral ranges, from 250 nm to2000 nm.
This device is combined with the unique mechanical design which
ensures repeatability and high stability of performance.

M a i n fe a t u re s
Integrated controller
Absolute encoder - no homing required■ High accuracy - ±0,004 deg (less than ± 0,01 % of laser power)■ Resolution - 0,002 deg, 7,4 arcsec, 0,035 mrad
■ Fast adjustment - less than 0,2 sec (min to max)
■ High damage threshold: up to 10J/cm2 (10 ns @ 1064 nm)■ Adjustable polarizer angle■■

WAVELENGTH

SKU

PRICE

257 nm

11809

1830 €

266 nm11810

1830 €

515+1030 nm

14898

1920 €

343 nm

11808

1690 €

355 nm

11805

1690 €

515 nm

11807

1580 €

532 nm

11806

1580 €

1030 nm

11804

1580 €

1064 nm

11708

1580 €All optical components of the LPA-A are made for high LIDT and provide astable and reliable performance even when using them with high power
lasers in industrial applications.
A secondary laser beam from the laser power attenuator unit can be rejected
to an external beam dump. The beam dump is used for avoiding any thermal
effects or stress in the housing of the LPA-A device.

Standard specifications

Ac c e s s o r i e s fo r l a s e r p o we r a t t e n u a t o r s L PA - A

ADVANCED VARIABLE MOTORIZED LASER POWER ATTENUATOR SPECIFICATIONSMOUNTING OPTION

FOR BEAM HEIGHT OF

SKU

PRICE

Input and output clear aperture

15 mm

Post mounting set

76,2 - 100 mm (3” – 4”)

9346

40 €

Controller

Integrated

Post mounting set

57 - 65 mm (2,2” – 2,6”)

9347

35 €

Dimensions (H x W x L)

86 x 47 x 58 mm

Control interface

USB or RS232

Dedicated beam dump withprotective window

-

9345

115 €

Application examples
Precise laser micromachining
Laser power stabilization■ Research
■
■

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BEAM DELIVERY DEVICES

Manual laser power attenuators LPA-M

S t a n d a rd p ro d u c t s
ATTENUATION
RANGE

LIDT

0,5-95 %2 J/cm2 (10 ns @ 266 nm)

0,2-96 %3 J/cm2 (10 ns @ 355nm)
2

5 J/cm (10 ns @ 532 nm)
0,1-98 %2

10 J/cm (10 ns @ 1064 nm)

4Lasers designs and manufactures industrial grade manual control laser
power attenuators for use in the UV, visible, and NIR spectral ranges,
from 240 nm to 2000 nm.

M a i n fe a t u re s
Industrial robust design■ Wide wavelength adoption 240 nm - 2 µm
■ Cost effective■ Suitable for high power industrial lasers

SKU

PRICE

257 nm

7896

850 €

266 nm

7887

850 €

343 nm

7885

800 €

355 nm

7886

800 €

515 nm

7673

690 €

532 nm

7672

690 €

1030 nm

7671

690 €

1064 nm

7670

690 €

All optical elements of these laser power attenuators are made for high LIDT
and provide a stable and reliable performance even when using them withhigh power lasers in industrial applications.

Standard specifications■

Application examples

WAVELENGTHVARIABLE MANUAL LASER POWER ATTENUATOR SPECIFICATIONS
Adjustment

ManualInput and output clear aperture

8 mm

Dimensions (H x W x L)

57 x 72 x 105 mm*Custom design available

Laser micromachining■ Laser power attenuation■ Research■194sales@4Lasers.com

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BEAM DELIVERY DEVICES

Manual 4 axis translation stage

MSTAGE is an industrial mounting solution for MEX compact series beam
expanders.
This 4-axis manual translation stage contains a locking mechanism preserving
the aligned position. It features sapphire contact pads determining longlasting and smooth micro screw operation.

M a i n fe a t u re s
Sapphire contact pads
■ Platform’s locking mechanism■ Industrial design■ 4 axis fine adjustment■ Maximum load up to 1,5 kg

S t a n d a rd p ro d u c t sMotorized beam expander MEX fine adjustment■ Precise alignment of optical components and other laser accessories

DIMENSION(W X H X L)

WEIGHT

HEX SCREWDRIVER

SKU

PRICE

Mstage75 x 28 x 100 mm

27 mm (±2 mm travel)

3mm, 2mm, 1.5 mm HEX

12571

580 €

There are four M6 x 0,25 micro screws for adjusting platform’s pitch, yaw, Y
and Z axis.
Two micro screws control platform’s pitch and Z axis, while anothertwo-control yaw and Y axis. All of them can be adjusted with 2 mm HEX
screwdriver.

Standard specifications■

Application examples

MODEL

SPECIFICATIONS
Travel range

Y axis: 8 mm (±4 mm)
Z axis: 4 mm (±2 mm)
Yaw: ±5.5 deg
Pitch: ±2.5 deg

Resolution

Y axis: 8 mm (±4 mm)
Z axis: 145 μm/rev■

Yaw: 0.018 deg/rev
Pitch: 0.010 deg/rev
Maximum load

Mounted horizontally 1.5 kg
Mounted vertically 0.6 kg

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LASER ACCESSORIES

Nonlinear
crystals
Laser
accessories

Donatas Rimkus

4Lasers offersa varietyof arelaserused
accessories
Nonlinear
opticalcrystals
in many designed
different anddedicatedtoenhancingyourcapabilities
tovisualize,
guide andnonlinear parametric applications. To mentiona few, second
tomonitornear
infrared(NIR)
andultraviolet
(UV)
laser
harmonic generation, difference frequency generation, beams,
opticalparasiticreflectionsorlossesinthefibers.
parametric amplification and other. A proper crystal has tobe chosen in order to use it for a particular application. Itshould have: transparency in the required spectral range,adequate birefringence for phase-matching, a high nonlinear
coefficient, high optical damage threshold, and otherproperties. Contact 4Lasers team for assistance and custom
solutions.
4Lasers develops and supplies different nonlinear crystals for
fundamental, applied research and industrial applications.
Available crystal growth techniques: Stepanov, Kyropoulos,
Czochralski (CZ), temperature gradient technique (TGT), flux
method.

198

I n f r a re d ( I R ) v i e we r s
ABRIS Mn e na er ai nr firnafre
Co n t o u r M
r adre(dI R ) CC Da D camera with(cNa ImR e) rCC

U V- N I R l a s e r b e a mvisualizers

U V- N I R l a s e r b e a m v i s u a l i z e r s

Co n t o u r n e a r i n f r a re d ( I R )digital CMOS camera

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199

Specifications
IR-VIEWERS ABRIS M SERIES SPECIFICATIONS

Spectral sensitivity

10350-1300 nm
350-1700 nm
350-2000 nm

1
mA/ W

LASER ACCESSORIESInfrared (IR) viewers ABRIS M

0,1
0,01
M 1300

0,001
0
300

M2000
M 1700

700

1100
500
Wavelenght (nm)1900

Resolution (centre)

60 Lp/mm

Working distance of lens

12,5 (+/-0,2) mm

Battery

1,5V, 1x “AAA” size

Non-uniformity of screen< 20 %

Non-uniformity of response< 15 %

Distortion of image<18 %Battery life (continuous)

35 hours

External power supply

DC 3V, 30 mA

Weight0,4 kgDimensions

140 x 78 x 52 mm

Temperature range-10 ºC … 40 ºСTripod or handle connection

R”1/4”

S t a n d a rd p ro d u c t s
Infrared (IR) viewers are used to observe, register, and record both indirect
and direct radiation of IR lasers, light emitting diodes (LED’s), dye and otherIR-sources. It is ideal for IR-laser beam alignment and inspection, optical fiberalignment, telecommunications, solar panel inspection, photo processing,surveillance and investigation in botany, biophysics, medicine, forensics andart restoration, infrared microscopy, fluorescence etc.
High performance image conversion infrared (IR) viewers based on highgrade image converter are designed to observe indirect radiation of infraredlaser, light emitting diodes (LED), dye and other IR-sources in 350–2000 nm
spectral range.

M a i n fe a t u re s

Application examples

Spectral region 350-2000 nm■ Resolution 60 Lp/mm■ Hand-held / post mounted■ Battery + DC powered■ Up to 35 hours continuous working■ Pulsed and CW light detection

■

■

200

(IR) Infrared viewer is based on a first-generation high-grade image
converter that has an electro-static focusing system, photocathode S-1+
with an increased concentration of oxygen and screen of type P-20 with the
maximum of luminescence at 550 nm.
Infrared viewer focus emitted or reflected light from a chosen object into theimage tube where the electron image is generated. When powered (with abattery or power supply) the 16-18 kV voltage is generated to accelerate theelectron image towards the phosphor screen at the output. The fluorescentgreen light output (550 nm) is observed via an adjustable eyepiece lens.

FIELD OF VIEWMAGNIFICATIONOBJECTIVELENS

ADJUSTABLE
IRIS

40°

1X

F1,4/25 mm

Included20°

2X

F1,8/50 mm

Included

FOCUS

0,15m (0,05m) to inf, (with distance ring)

0,5m (0,15m) to inf, (with distance ring)

SPECTRALSENSITIVITY

SKU

PRICE

350-1700 nm

7404

1330 €

350-1300 nm

7654

1290 €

350-2000 nm

7655

1430 €

350-1300 nm

7656

1340 €

350-1700 nm

7657

1390 €

350-2000 nm

7658

1490 €

Laser alignment and safety
Semiconductor inspection■ Forensics and art restoration■ Photo processing■ Thermal imaging■

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Contour near infrared (IR) digital CMOS camera
Spectral sensitivity

1

400-1700 nm

The near infrared Contour-IR camera is designed for observation, registration
and recording radiation in the near infrared zone of the 400 - 1700 nm
spectral region emitted by infrared sources such as GaAs IR LED, diodeor solid-state lasers as well as for use in infrared microscopy, infrared
luminescence, examination of documents, forensics, art restoration and etc.

0,1

0,01

Spectral region 400-1700 nm■ High sensitivity CCD camera■ Small and compact■ Tripod fixed■ Cost-effective■ Video output
Application examples
Laser alignment and safety■ Semiconductor inspection■ Forensics and art restoration■ Photo processing■ Thermal imaging■ Technical information
■

350

550

The near infrared Contour IR Digital camera is designed for observation,
registration and recording radiation in the near infrared zone of the 400 1700 nm spectral region emitted by infrared sources such as GaAs IR LED,
diode or solid-state lasers as well as for use in infrared microscopy, infrared
luminescence, examination of documents, forensics, art restoration, etc.

M a i n fe a t u re s

CONTOUR IR CCD CAMERA SPECIFICATIONS

Spectral region 400-1700 nm■ Newest technology CMOS sensor with micro lenses■ Controlled from a computer via USB2.0 and USB3.0■ High sensitivity■ IR cut-off filter and case included

10°

Focusing range

0,2 m (or 0,08 m with distance ring) to inf

Ration signal-to-noise

48 dB

Video output

CCIR Standard composite video

Power supply

DC 10 … 14 V, 150 mA

Temperature range+5 … +40 °C

Weight0,23 kg

Application examples

Dimensions

90 x 50 x 58 mm■

Laser alignment and safety
Semiconductor inspection■ Forensics and art restoration■ Photo processing■ Thermal imaging■

Standard products
SENSORSIZE

MAXIMUM RESOLUTIONRESOLU- AT MAXIMUMTIONSENSITIVITY

400-1700 nm

1/3 inches,
6,0 mm x
4,96 mm

570 TVlines

135 TV lines

LENS
F1,4/26 mm,
C-mount

SKU

7660

0,01

PRICE

1099 €

550

750 950 1150 1350 1550 1750
Wavelenght (nm)The camera is based on the newest technology CMOS sensor with anincreased sensitivity, micro lenses on photocells and intensifying cascades ineach element. Camera is connected to PC via USB 2.0 (USB 3.0) cable.

Specifications■

Field of view

SPECTRALSENSITIVITY

0,1

0,001
350

750 950 1150 1350 1550 1750
Wavelenght (nm)The camera is based on a highly sensitive low-noise silicon CCD sensor andtwo-photon absorption phenomenon. Superior image quality is obtained
thanks to the micro lens system and a special coating layer on silicon.

M a i n fe a t u re s■

Relative response

400-1700 nm

0,001

202

Spectral sensitivity

1

Relative response

LASER ACCESSORIES

Contour near infrared (IR) CCD camera

CONTOUR IR DIGITAL CMOS CAMERA SPECIFICATIONS
SensorPixel size
Dynamic range
Ratio signal-to-noise
Format 1
Format 2
Format 3
Format 4
Range of exposure
WeightDimensions

CMOS 1/3” 1280 (h) x 960 (w)3,75 x 3,75 µm
60 dB
54 dB
1280 x 960 (4, 8, 12.5, 16, 25, 30 Hz)
1280 x 720 (5, 10, 15, 20, 30, 40 Hz)
800 x 600 (6.25, 12.5, 20, 30, 40, 50 Hz)
640 x 480 (8, 16, 25, 32, 50, 64 Hz)
3,4×10-5–3,4×10-2 s
0,2 kg55 x 55 x 75 mm

S t a n d a rd p r o d u c t s
SPECTRALSENSITIVITYSENSOR SIZE

LENS

4001700 nm

1/3 inches,
6,0mm x 4,96mm

F1,4/26mm,
CS-mount

FIELD OF
VIEW

FOCUSING
RANGE

SKU

PRICE

10°

0,15m toinfinity

7663

1199 €

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LASER ACCESSORIESUV-NIR laser beam visualizers

Laser beam visualizers are designed to detect UV and IR both CW andpulsed laser light radiation.
These visualizers are fabricated from aluminum with an organic
polycrystal photosensitive region, which enables easy location of
M a i n fe a t u re s
Wavelength detection from UV to NIR■ Suitable for CW and pulsed laser light■ High sensitivity to laser radiation – 0,1 mW/mm2■ Damage threshold for pulsed laser – 1 J/cm2, 10 ns■ Both sides are active
■

Notes

UV-VIS-NIR light beams and focal points. As it is not necessary to charge
the active region both CW and pulsed laser light will be detected even in
darkened room conditions.

Standard products
CLEAR
ITEM MODELAPERTURE
35 mm

IRV-R-1
IRV-G-1

DETECTION
SPECTRAL RANGEEMISSION THRESHOLDCOLORSENSITIVITY

SKU

PRICE

190-1090 + 14701600 nm

Red

0,01 W/cm2

7662

89 €

2

7661

75 €

880-1070 nm

Green0,02 W/cm

Application examples
■
■

204

Laser alignment
Researchsales@4Lasers.com

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GENERAL TERMS AND CONDITIONS OF SALE
206

General Terms and Conditions of SaleO r d e r s m a y b e p l a c e d b y re g u l a r m a i l, e - m a i l o r f a x t o :2 . D e l i ve r y a n d d e l a y s

Optogama, UAB
Mokslininku st. 2A
LT-08412, Vilnius, LITHUANIA

Delivery dates noted on the Order Confirmation are subject to reasonableadjustment. The acceptance of shipment by a common carrier or by any
licensed public truckman shall constitute proper delivery.

Phone: +370 5 219 4884
Fax: +370 5 219 4883
E-mail: sales@4Lasers.com

In case Optogama is unable to deliver ordered goods in time, Optogama
shall notify buyer of this and at the same time, if possible, provide buyer withinformation on expected delivery date.

1 . Pr i c e s a n d p a y m e n t

Wi r e t r a n s fe r d e t a i l s :All price quotations are subject to confirmation and are non-binding. Unlessotherwise agreed to by Optogama in writing, and all prices for the sale ofProduct are stated in and to be paid in € (Euro).
For the orders below 200 € additional documentation and handling fee may
be applied.
All payments are due and payable in thirty (30) days from date of invoice.
Optogama reserves the right to require alternative payment terms,
including without limitation letter of credit or payment in advance.
Payments not made by the due date shall be subject to a late payment
charge of the lesser of 0,2 % per day or the maximum rate permitted by law.
Bank fees associated with payment should be paid by the Buyer.
Payment can be made by wire transfer or credit card.

Account number (IBAN): LT88 7044 0600 0802 0123
Bank name:
AB SEB Bankas, address: Gedimino Ave. 12, LT-01103 Vilnius, LITHUANIASWIFT Code: CBVI LT 2X
Beneficiary:
Optogama UAB, address: Mokslininku Str. 2A, LT-08412 Vilnius, LITHUANIA

Optogama shall not be responsible for any loss suffered by buyer, including loss
on operations, loss of profits or other indirect losses as a result of the delay indelivery, and consequently Optogama shall not compensate buyer for any ofsuch loss.
Optogama reserves the right to deliver Products on DAP (Incoterms 2010) basis
by DHL, UPS, TNT, FedEx or other forwarders and request to cover delivery
charges by the Buyer.

3. Limited warranty and liability
Pa y m e n t u s i n g Pa y Pa l , c r e d i t , o r d e b i t c a r d :Your payment will be processed through PayPal payment system. PayPal allows
you to make payments using a variety of methods including: PayPal Cash or
PayPal Cash Plus account balance, a bank account, PayPal Credit, debit or credit
cards, and rewards balance.
Please request Proforma Invoice for advanced payment. PayPal payment fee: 4%
from total order amount + delivery costs.

All products are guaranteed to be free from defects. Claims are accepted for aperiod of three months after delivery. We do not assume liability for installation,
labor, or consequential damages.

Consequently, Optogama shall have no liability for any personal injury, property
damage or other loss based on the use of the product in combination withor integrated into any other instrument or device. However, if Optogama isheld liable, whether directly or indirectly, for any loss or damage arising under
this limited warranty or otherwise, regardless of cause or origin, Optogama
maximum liability shall not in any case exceed the purchase price of the productwhich shall be the complete and exclusive remedy against Optogama.

4 . Pro d u c t re t u r n o r re p a i r
Buyer will notify Optogama about the occurrence of defective or nonoperational Product and request a Return Authorization Number(RMA) from Optogama for the items Buyer would like to return forrepair or replacement by email. This RMA number is to be used for all
correspondence and shipping documents that relate to the Product.
Buyer will ship the defective or non-operational Product to Optogama.
Buyer is responsible for shipping cost.
Upon receipt of the returned Product, Optogama will test the Product to verify
the defective status of the component within the terms of the Limited Warranty
and communicate such results to Buyer.
Optogama will either send a repaired or replacement Product after verifyingthat the Product returned under the RMA number is in fact defective within
the terms of the Limited Warranty. Optogama is responsible for shipping
costs of replacement Product to the Buyer.

Optogama shall not be liable for any defects or losses suffered by buyer,
including loss on operations, loss of profits or other indirect losses as a result of
the defects, and consequently Optogama shall not compensate buyer for any ofsuch loss.

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207

4LASERS
Optogama, UAB
Mokslininku st. 2A
LT-08412, Vilnius,
LITHUANIA
www.4Lasers.com
sales@4Lasers.com
Phone: +370 5 219 4884
Fax: +370 5 219 4883