Koheras
ADJUSTIK

Low-noise, single-frequency fiber laser

Narrow linewidth
Ideal for ultra-low noise applications
The Koheras ADJUSTIK is a low-noise fiber laser platform
featuring the ultra-low phase noise and narrow linewidthnormally only found in costly scientific systems.
The ADJUSTIK is based on our renowned BASIK modules
with output powers ranging from 10 mW up to 2 W dependingon the model.

KoherasADJUSTIK
Applications
Atomic trapping and cooling
Quantum computing
Quantum metrology
Acoustic detection
Laser vibrometry
Microwave generation
Sensor interferometry
Frequency conversion
Coherent communication

NKT PHOTONICS

Koheras ADJUSTIK2

Koheras
ADJUSTIK

Benefits
High performance and low cost
The ADJUSTIK lasers are industrial-grade fiber lasers that give
you the best of two worlds: The ultra-low phase noise andnarrow linewidth of the scientific systems and the low costand robustness of the industrial systems.

Thermal tuning and fast wavelength modulation
The laser offers a wide thermal tuning range combined with fast
wavelength modulation for e.g. stabilization to an externalfrequency reference to obtain an even higher level of frequency
stability than provided by the free-running laser.

Tunable center wavelength and output power
A key advantage of our distributed feedback fiber laser
technology is the freedom to choose the operating wavelength.

Polarization-maintaining fiber output
The standard output is a polarization maintaining fiber to ensure
a fixed orientation of the polarization.

Standard systems deliver 10-40 mW
Standard systems are available at 1550.12 nm and 1064.00 nm
and we offer special systems anywhere in the 1535–1580 nm
and 1030–1120 nm ranges. Depending on the model, output
powers are 10-40 mW.

Ideal for low-noise applications
The ADJUSTIK lasers are ideal for experimental work for all kindsof low noise applications e.g. for metrology and coherent sensing
where laser noise is critical.

Choose the high power option
If higher powers are needed, choose the ADJUSTIK HP which
operates at 1550.12 nm or 1064.00 nm. It delivers output powersof 2 W in the 1545–1565 nm range, 200 mW in the 1060–1075
nm range, and 500 mW at 1762.17 nm.

NKT PHOTONICS

Koheras ADJUSTIKUSABILITY

3Features and Benefits

KoherasADJUSTIK

Easy to control via a graphical user interface
For easy control, the ADJUSTIK lasers are available with a USB
interface kit and can be controlled via our NKTP CONTROL
graphical user interface.
The market’s lowest frequency noise
The ADJUSTIK lasers features a very low frequency noise,
unparalleled in industrial fiber lasers.
The low noise and robust single-frequency operation makes theADJUSTIK lasers a strong choice for coherent sensing, as well asfor metrology applications.
In sensing systems, the low frequency noise is key to obtaining
high sensitivity and accuracy.

Features
Center wavelengths in the 1535–1580 nm,1030–1120 nm ranges, and at 1762.17 nm
High-power: Up to 2 W
Industry-leading low phase noise
Extremely narrow linewidth
Stable single-frequency operation
Wide thermal wavelength tuning

NKT PHOTONICS

NKT Photonics
CONTROL
Like other NKT Photonics
lasers, the Koheras
ADJUSTIK can be controlled by our intuitive CONTROL
software that gives easy
access to all laser functions.
The software automaticallydetects all units attached tothe computer. It is easy to use
and supports touch input aswell as traditional mouse andkeyboard control.

Integrated fast wavelength modulation
Polarization-maintaining fiber output
Easy-to-use benchtop system
Graphical user interface
Plug and Play
Robust and maintenance-free

Koheras ADJUSTIKSPECIFICATIONS

4

Specifications - ADJUSTIK

KoherasADJUSTIK

OpticalModel

X15

Laser emission

E15

Y10

Continuous wave - inherently single frequency

Output power [mW]3040> 10

Operating wavelength [nm]1535-1580

1535-1580

1030-1120

Output power tunability [%]30 - 100

30 - 100-

Linewidth [kHz] 1

< 0.1

< 0.1

< 20

Max. phase noise [dB((rad/√Hz)/m)]-105 @ 1 Hz--

-125 @ 10 Hz-90 @ 10 Hz--130 @ 100 Hz-110 @ 100 Hz--128 @ 1 kHz-130 @ 20 kHz-

5.6 @ 1 Hz--

0.6 @ 10 Hz

3.2 @ 10 Hz-

0.3 @ 100 Hz

3.2 @ 100 Hz-

0.4 @ 1 kHz

0.3 @ 20 kHz-

RIN peak [MHz]Appr. 0.7

Appr. 0.7

Appr. 1.5

RIN level [dBc/Hz]< -100 @ peak

< -100 @ peak

< -105 @ peak

< -135 @ 10 MHz< -135 @ 10 MHz< -140 @ 10 MHzMax. phase noise [(μrad/√Hz)/m]

NKT PHOTONICS

Koheras ADJUSTIKRELIABILITY
The Koheras range of single
frequency fiber lasers isbased on telecom-grade
fiber components and built
to last thousands of hours withno service or maintenance.
With several thousand lasers
installed in environments
varying from fully climate c
ontrolled national standards
laboratories to the demanding
environment on oil rigs andsubmarines, the Koheras line is
the most robust singlefrequency laser range on themarket with an unmatchedreliability track record.

SPECIFICATIONS

5Specifications - ADJUSTIK (continued)

KoherasADJUSTIK

OpticalModel

X15E15Y10

Optical S/N (50 pm res.) [dB]

> 50 (typ. > 55)> 50 (typ. > 55)> 65 (typ. > 70)

Min. thermal wavelength tuning range [pm] 2± 350

± 350

± 240

Total thermal tuning range [pm]

1000

1000

680

Fast wavelength modulation range [GHz] 3

0.5

810

Fast wavelength modulation [kHz] 3

Up to 20

Up to 20

Up to 20

PM output - PER [dB]

> 23

> 23> 231) Lorentzian.
2) Relative to center wavelength at room temperature. If the laser case temperature is outside the interval of approximately 10-50 °C, the range of detuning from the center wavelength may be reduced.
3) Modulation depth and frequency are typically slew-rate limited, depending on the power.

NKT PHOTONICS

Koheras ADJUSTIKSPECIFICATIONS

6

Specifications - ADJUSTIK HP

KoherasADJUSTIK

OpticalModel

X15 1

Laser emission

E15

Y10T20Continuous wave - inherently single frequency

Output power [W]

0.2 / 2.0

0.2 / 2.0

0.20.5

Operating wavelength [nm]1545 — 1565

1545 — 1565

1060 — 1075

1762.17

Output power tunability [%]25 — 100 @ 0.2 W

25 — 100 @ 0.2 W

25 — 100 @ 0.2 W

N/A

10 — 100 @ 2 W

10 — 100 @ 2 W

N/A

10 — 100 @ 0.5 W

Linewidth [kHz] 2

< 0.1

< 0.1

< 20

< 10

Max. phase noise [dB((rad/√Hz)/m)]-105 @ 1 Hz (typ.)----125 @ 10 Hz-90 @ 10 Hz--80 @ 10 Hz-130 @ 100 Hz-110 @ 100 Hz--100 @ 100 Hz-128 @ 1 kHz-130 @ 20 kHz--120 @ 20 kHz

5.6 @ 1 Hz (typ.)---0.6 @ 10 Hz

3.2 @ 10 Hz-100 @ 10 Hz

0.3 @ 100 Hz

3.2 @ 100 Hz-10 @ 100 Hz

0.4 @ 1 kHz

0.3 @ 20 kHz-

1 @ 20 Hz

Appr. 0.7

Appr. 0.7

Appr. 1.5

Appr. 0.7

Max. phase noise [(μrad/√Hz)/m]

RIN peak [MHz]NKT PHOTONICS

Koheras ADJUSTIKSPECIFICATIONS

7

Specifications - ADJUSTIK HP (continued)

KoherasADJUSTIK

OpticalModel

X15

E15

Y10

T20

RIN level [dBc/Hz]< -100 @ peak

< -100 @ peak

< -105 @ peak

< -80 @ peak

< -135 @ 10 MHz< -135 @ 10 MHz< -140 @ 10 MHz< -120 @ 10 MHz

Optical S/N (50 pm res.) [dB]

> 45

> 45> 60> 45Min. thermal wavelength tuning range [pm] 3± 350

± 350

± 240

± 350

Total thermal tuning range [pm]10001000680~900 (TDB)

Fast wavelength modulation range [GHz] 40.5

8106

Fast wavelength modulation [kHz] 4

Up to 20

Up to 20

Up to 20

Up to 20

PM output - PER [dB]

> 20

> 20

> 17

> 17

Control mode

Constant pump current, constant power

1) X15 phase noise app. 20 dB lower in the 1 Hz-10 kHz frequency range compared to E15.
2) Lorentzian.
3) Relative to center wavelength at room temperature. If the laser case temperature is outside the interval of app. 10-50 °C, the range of detuning from the center wavelength may be reduced.
4) Modulation depth and frequency are typically slew-rate limited, depending on the power.

NKT PHOTONICS

Koheras ADJUSTIKSPECIFICATIONS

8Specifications

KoherasADJUSTIKElectrical/Mechanical/Environmental
Power supply requirements [VAC, Hz]
Digital interface
Amplitude and frequency modulation [V]-50100-240 VAC, 50-60 Hz-60

USB 2.0, Ethernet 10/100

ADJUSTIK X15 (typ.)-70

DB9 male, differential 2x5Monitor output 1

Yes, FC/APC bulkhead

Operation temperature [°C] 215 – 55

Storage temperature [°C]

-20 – 60

Dimensions (WxHxL) [mm3]483 x 50.1 x 382.1 (19” 1U)

Weight [kg]6-130

Humidity non-condensing [% RH]

0 – 70-140

Koheras ADJUSTIK

Phase noise [dB// Rad/√Hz]

Standard: FC/APC pigtail 1 m

NKT PHOTONICS

ADJUSTIK E15 (max.)-80

Connectors

1) Optical monitor signal is approximately 1% of the seed laser signal.
2) Internal module case temperature.

ADJUSTIK E15 (typ.)

ADJUSTIK X15 (max.)-90-100-110-120-150

110100

1000

10000

Frequency [Hz]

SPECIFICATIONS

9Technical Drawings
3433323130292827262524232221201918

171615141312111098

7654

321

REVISIONS
ZONE

REV.

DESCRIPTIONDATEAPPROVEDY

Y
1-0

Initial release for marketing

28-11-2022

AZRU

W

W

V

V

483
463

66,2

47,7

U

43

U

315,8

T

7,1

T

RR

P

P

447

N

KoherasADJUSTIKAll NKT Photonics products
are produced under ourquality management
system certified inaccordance with theISO 9001:2015 standard.

N190,35M

MLLKKJJH382,1© Copyright 2023 NKT Photonics A/S All Rights Reserved

Koheras_ADJUSTIK_20231220

INVISIBLE LASER RADIATIONAVOID EYE OR SKIN EXPOSURE TO
DIRECT OR SCATTERED RADIATION

H

GGF

F

E

E

D

DCC

NKT PHOTONICS

Koheras ADJUSTIKTECHNICAL DRAWINGS

Non-dimensioned geometry specified by CAD-file with identical part/drawing-number and revision.

B

B
NAME

DATE

Material: Defined by BOM

Projection:

REVISION:

1Title:Drawn by
Checked byApproved by

AZRU

28-11-2022

UNLESS OTHERWISE SPECIFIED:A

CLASS 3B LASER PRODUCT-DIMENSIONS ARE IN MILLIMETERS-SURFACE ROUGHNESS: Ra<3,2-GENERAL TOLERANCES: ISO 2768-

Confidential
Intellectual property owned exclusively by NKT Photonics.
Terms and conditions for confidentiality, orders, warranty,compliance, quality control, delivery and payment as definedin signed contract or standard terms on www.nktphotonics.com

Drawing number = Partnumber:114063

A10nktphotonics.com