NT260 ▪ NT230 ▪ NT240 ▪ NT250 ▪ NT270 ▪ NT340

NT250 series

TunableWavelength
UV-NIR Range
DPSS Lasers
F E AT U R E S

Nanosecond
Nanosecond Tunable Wavelength
Wavelength Lasers
LasersNANOSECOND TUNABLE WAVELENGTH L ASERS▶ Customers recognized reliability▶ Integrates DPSS pump laser andOPO into a single housing▶ Dry, no water inside!

▶ Hands-free no-gap wavelengthtuning from 335 to 2600 nm*▶ 1000 Hz pulse repetition rate

Nanosecond Lasers▶ Two years warranty▶ More than 1.1 mJ output pulse

energy in NIR▶ 1 – 4 ns pulse duration

BENEFITS▶ Hands-free wavelength tuning –no need for physical intervention▶ High repetition rate (1000 Hz)

enables fast data collection▶ End diode pumping and water-freetechnology ensure high reliability
and low maintenance costs▶ Superior tuning resolution(1 – 2 cm⁻¹) allows recording ofhigh quality spectra▶ High integration level saves

valuable space in the laboratory

NT250 series tunable laser systems
integrates into a single compact
housing a nanosecond OpticalParametric Oscillator (OPO) andDiode-Pumped Solid–State (DPSS)
Q-switched pump laser.
Diode pumping enables fast dataacquisition at high pulse repetition
rates up to 1 kHz while avoiding
frequent flashlamp changes that arecommon when flashlamp pumped
lasers are used. Special coolingtechnology eliminates the need fortap water, thus further reducing
running and maintenance costs.

REV. 240116▶ In-house design and manufacturingof complete systems, including pumplasers, guarantees on-time warranty
and post warranty services andspares supply▶ Variety of control interfaces: USB,

RS232, LAN and WLAN ensures easy
control and integration with otherequipment▶ Attenuator and fiber coupling

options facilitate incorporationof NT250 systems into various
experimental environments

All lasers feature motorized tuning
across the specified tuning range. The
output wavelength can be set fromcontrol pad with backlit display that iseasy to read even while wearing laser
safety glasses. Alternatively, the laser
can be also controlled from personal
computer using supplied LabVIEW™
drivers.
High conversion efficiency, stable
output, easy maintenance andcompact size make our systems
excellent choice for many applications.

▶ Remote control via key pad or PC* Automatic wavelength scan is optional

A P P L I C AT I O N S▶ Photoacoustic imaging▶ Laser-induced fluorescencespectroscopy▶ Pump-probe spectroscopy▶ Photobiology▶ Remote sensing▶ Metrology

Accessories and Optional Items
OptionFeatures-SH

Tuning range extension in
UV range (335 – 670 nm)
by second harmonicgeneration-H, -2H

1064 and 532 nm output
via separate port

-FC

Fiber coupler-Attn

Attenuator option

SAVANORIU AV. 237, LT-02300 VILNIUS, LITHUANIA TEL +370 5 2649629 E-MAIL SALES@EKSPL A.COM WWW.EKSPL A.COM

15

NT250 series

NANOSECOND TUNABLE WAVELENGTH L ASERS
Nanosecond
Nanosecond Tunable Wavelength
Wavelength Lasers
LasersS P E C I F I C AT I O N S ¹⁾
Model

NT252

OPO

Wavelength range
Signal

670 – 1064 nm

Idler

1065 – 2600 nm

SH

335 – 669 nm

Pulse energy
OPO 2)

1100 µJ

SH 3)

200 µJ

Pulse duration 4)

1 – 4 ns

Pulse repetition rate

1000 Hz

Nanosecond Lasers

Linewidth 5)<10 cm⁻¹Signal

1 cm⁻¹SH

2 cm⁻¹Signal

horizontalSHhorizontalMinimal tuning step 6)
Idler

1 cm⁻¹

Polarization
Idler

vertical3 × 6 mm

Typical beam diameter 7) 8)
PUMP LASERPump wavelength 9)

532 nmPulse duration

2 – 5 ns

Typical pump pulse energy 10)

4 mJ

11)

Pulse energy stability (StdDev)<2.5 %PHYSICAL CHARACTERISTICS

Unit size (W × L × H)

456 × 1040 × 297 mm

Umbilical length

2.5 m

Power supply size (W × L × H)

520 × 400 × 286 mm

OPERATING REQUIREMENTS

Cooling

air-cooled

Room temperature

18 – 27 °C

Relative humidity

20 – 80 % (non-condensing)Power requirements

100 – 240 V AC, single phase 50/60 Hz

Power consumption<1.5 kW

Cleanliness of the room
1)

2)

3)

4)

5)

16

not worse than ISO Class 9

Due to continuous improvement, allspecifications are subject to change.
Parameters marked typical are illustrative;
they are indications of typical performanceand will vary with each unit we manufacture.
Unless stated otherwise, all specifications aremeasured at 750 nm and for basic system
without options.
Measured at maximum in the interval
700 – 750 nm. See tuning curves for typicaloutputs at other wavelengths.
Measured at 400 nm. See tuning curves fortypical outputs at other wavelengths.
Measured at FWHM level with photodiodefeaturing 1 ns rise time and 300 MHz
bandwidth oscilloscope.
In signal and idler range.

6)

7)

8)

9)

10)

11)

For manual input from PC. When wavelength
is controlled from keypad, tuning resolution is
0.1 nm for signal, 1 nm for idler and 0.05 nm
for SH.
Measured at the wavelength indicated in the“Pulse energy” specification row.

Beam diameter is measured at the 1/e² level at
the laser output and can vary depending onthe pump pulse energy.

DANGERVISIBLE AND/OR INVISIBLE LASER RADIATIONAVOID EYE OR SKIN EXPOSURE TO DIRECTREFLECTED OR SCATTERED RADIATION
Tunable, 335 – 2600 nm
Max. 4 mJ, pulse 4 – 6 ns
CLASS IV LASER PRODUCT

Separate output port for the 2nd and otherharmonic are optional.

The pump laser pulse energy will be optimized
for best OPO performance. The actual pumplaser output can vary with each unit wemanufacture.
Measured at FWHM level with photodiodefeaturing 1 ns rise time and 300 MHz
bandwidth oscilloscope.

SAVANORIU AV. 237, LT-02300 VILNIUS, LITHUANIA TEL +370 5 2649629 E-MAIL SALES@EKSPL A.COM WWW.EKSPL A.COM   REV. 240116

PERFORMANCE

33.3

16.6

Wavenumber, 10³ × cm ¹
11.1
6.66
5.00

1200

SH option
NT252 signal
NT252 idler

1000

Pulse energy, µJ

4.00

800
600
400
2000300

600

900
1500
Wavelength, nm

2000

Nanosecond
Nanosecond Tunable Wavelength
Wavelength Lasers
Lasers

NT250 series

NANOSECOND TUNABLE WAVELENGTH L ASERS

2500

205105NT252

187±5261±5355302 MAXO U T L I N E D R AW I N G S

Nanosecond Lasers

Fig 1. Typical output pulse energyof the NT252-SH tunable laser

OUTPUT1551

200223405

Controlpanel4561040

Fiber cable

Minimal curvatureradius of fiber
cable 200 mm

Fig 3. NT252 series laser head dimensions

O R D E R I N G I N F O R M AT I O N
Note: Laser must beconnected to the mains
electricity all the time. If there
will be no mains electricity for
longer that 1 hour then laser(system) needs warm up for afew hours before switching on.

NT252-SH-2H
ModelOptional tuning range
extension:
SH → 335 – 670 nm

Options:
2H → extra 532 nm output
H→ extra 1064 nm output

www.phototechnica.co.jp〒336-0017 埼玉県さいたま市南区南浦和 1-2-17

TEL:048-871-0067 FAX:048-871-0068

e-mail:voc@phototechnica.co.jp
REV. 240116

SAVANORIU AV. 237, LT-02300 VILNIUS, LITHUANIA TEL +370 5 2649629 E-MAIL SALES@EKSPL A.COM WWW.EKSPL A.COM17