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

 

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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
X15 HP 1550.12 nm 1545 - 1565 nm 2 W Yes Yes
C15 HP 1550.12 nm 1545 - 1565 nm 2 W Yes Yes
E15 HP 1550.12 nm 1545 - 1565 nm 2 W Yes Yes
Y10 HP 1064.00 nm 1060 - 1075 nm 0.2 W 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.

ADJUSTIK Phase noise versus frequency

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 <5 kHz (C15 and Y10 models).

ADJUSTIK

Optical

Model X15 E15 C15 Y10
Laser emission CW - inherently single frequency
Output power [mW] 22.5 40 > 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] -110@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 Hz
0.6@10 Hz
0.3@100 Hz
0.4@1 kHz
32@10 Hz
3.2@100 Hz
0.3@20 kHz
355@10 Hz
36@100 Hz
3.5@20 kHz
-
RIN peak [MHz] Approx. 0.7 Approx. 0.7 Approx. 1.0 Approx. 1.5
RIN level @ peak / 10 MHz [dBc/Hz] <-100 / <-135 <-120 / <-140 <-105 / <-140
Optical S/N (50 pm res.) [dB] > 50 (typ. > 55) > 50 (typ. > 55) > 65 (typ > 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] 0.6 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


Koheras ADJUSTIK mechanical drawing front view x15-01
Koheras ADJUSTIK mechanical drawing top view x15-01

ADJUSTIK HP

Optical

Model X15 1) E15 C15 Y10
Laser emission CW - inherently single frequency
Output power [W] 2.0 2.0 2.0 0.2
Operating wavelength [nm] 1545-1565 1545-1565 1545-1565 1060-1075
Output power tuneability [%] 10-100 10-100 10-100 10-100
Beam quality [M²] < 1.05 < 1.05 < 1.05 < 1.05
Linewidth [kHz] 2) < 0.1 < 0.1 < 15 < 20
RIN peak [MHz] Approx. 0.7 Approx. 0.7 Approx. 1.0 Approx. 1.5
RIN level @ peak / 10 MHz [dBc/Hz] <-100 / <-135 <-120 / <-140 <-105 / <-140
Optical S/N (50 pm res.) [dB] > 40 > 40 > 55 > 55
Min thermal wavelength tuning range [pm] 3) +/- 350 +/- 350 +/- 350 +/- 240
Total thermal tuning range [pm] 1000 1000 1000 680
Fast wavelength modulation range [GHz] 8 8 8 10
Fast wavelength modulation [kHz] 4) Up to 20
PM output - PER [dB] > 23
Output isolation [dB] 30

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

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


Koheras ADJUSTIK mechanical drawing front view x15-01
Koheras ADJUSTIK mechanical drawing top view x15-01
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