Koheras ADJUSTIK low noise single-frequency lasers

The Koheras ADJUSTIK is a rack-mountable benchtop single-frequency DFB fiber laser. Based on our renowned BASIK modules, the ADJUSTIK is the pinnacle of industrial low noise lasers featuring ultra-low phase noise and Hz-range linewidth normally only found in costly scientific systems.

This range of benchtop laser systems is typically offered as rapidly deployable sources for research laboratories that wish to use it as a tool for scientific work and not spend time on setting up a laser system.

The benchtop models are based on our Koheras BASIK Module seed technology and are upgradable in terms of output power. The systems are supplied with our NKTP CONTROL software for the control and read-out of laser parameters on a PC such as a wavelength, output power, and RIN suppression.

Standard or high power?

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.

If higher powers are needed, choose the ADJUSTIK HP that delivers up to 2 W output power.

Ideal for low-noise applications

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

Features

Center wavelengths in the 1535–1580 nm and 1030–1120 nm ranges

High-power: Up to 2 W

Industry-leading low phase noise and extremely narrow linewidth

Stable single-frequency operation

Wide thermal wavelength tuning

Integrated fast wavelength modulation

Polarization-maintaining fiber output

Robust and maintenance-free

Laser models

Model

Standard Wavelength

Other wavelengths

Output power

PM

Fast modulation

X15

1550.12 nm

1535 - 1580 nm

22.5 mW*

Yes

Yes

E15

1550.12 nm

1535 - 1580 nm

40 mW

Yes

Yes

C15

1550.12 nm

1535 - 1580 nm

> 10 mW*

Yes

Yes

Y10

1064.00 nm

1030 - 1120 nm

> 10 mW*

Yes

Yes

*) Fixed output power (non-adjustable)

C15: Is a Co-doped Erbium/Ytterbium fiber laser for operation in the 1535-1580 nm wavelength range offering the lowest intensity noise (RIN) and is a shot noise limited fiber laser.

X15/E15: Is an Erbium-doped fiber laser for operation in the 1535-1580 nm wavelength range offering the lowest phase and frequency noise and narrowest linewidth of the entire laser portfolio. It is often deployed for interferometric sensor applications demanding 10s of kilometers of coherence length and ultra-high frequency stability.

Y10: Ytterbium-doped fiber laser system for operation in the 1030-1120 nm wavelength range with narrow linewidth and low-intensity noise. This laser is commonly used for laser stabilization, atomic physics/metrology, spectroscopy, fusion energy, general replacement of conventional Nd:YAG lasers, and many other applications.

Other product features

PM operation: The output of the ADJUSTIK fiber laser is a Single Mode Fiber with PM (Polarisation Maintaining) output to ensure a fixed orientation of the polarisation. This may be required whenever the laser output needs to be externally modulated or frequency converted.

Thermal wavelength tuning: The Koheras fiber laser systems are per default thermally tunable to enable the user to match and stabilize the laser at a certain wavelength.

Fast wavelength tuning: This feature can be offered for applications demanding higher wavelength stability than provided by the free-running laser. It enables the laser e.g. to be locked to an external reference such as an atomic transition line or interferometer.

Other options

Linewidth reduction to 10

> 10

Beam quality [M²]

< 1.05

< 1.05

< 1.05

< 1.05

Linewidth [kHz] *

< 0.1

< 0.1

< 15

< 20

Max phase noise [dB((Rad/√Hz)/m)]

-105@1 Hz-125@10 Hz-130@100 Hz-128@1 kHz

-90@10 Hz-110@100 Hz-130@20 kHz

-69@10 Hz-89@100 Hz-109@20 kHz

-

Max phase noise [(µrad/√Hz)/m]

3.1 @1 Hz0.6@10 Hz0.3@100 Hz0.4@1 kHz

32@10 Hz3.2@100 Hz0.3@20 kHz

355@10 Hz36@100 Hz3.5@20 kHz

-

RIN peak [MHz]

Approx. 0.7

Approx. 0.7

Approx. 1.0

Approx. 1.5

RIN level @ peak / 10 MHz [dBc/Hz]

70)

> 65 (typ > 70)

Min thermal wavelength tuning range [pm] **

+/- 350

+/- 350

+/- 350

+/- 240

Total thermal tuning range [pm]

1000

1000

1000

680

Fast wavelength modulation range [GHz]

0.5

8

8

10

Fast wavelength modulation [kHz]

Up to 20

PM output - PER [dB]

> 23

* Lorentzian** Relative to center wavelength at room temperature. If the laser is operated in very cold or hot environments, this wavelength range is truncated on either the upper or lower side

Mechanical/Electrical

Power supply requirements [VAC]

100-240, 50-60 Hz

Digital interface

USB 2.0, Ethernet 10/100

Amplitude and frequency modulation

DB9 (male), differential 2x5 V

Fiber output type

FC/APC

Fiber pigtail length [m]

App. 1

Monitor output

Yes (FC/APC bulkhead)

Dimensions (WxHxL) [mm]

483 x 48.5 x 386 (19” 1U)

Weight [kg]

< 7

Environmental

Operating temperature range [°C]

15 - 55 (internal case temp)

Storage temperature [°C]

-20 - 60

Humidity non condensing [%RH]

0 - 70