Koheras BOOSTIK amplifier line card

The Koheras BOOSTIK is a compact fiber amplifier module designed for our low-noise, narrow-linewidth Koheras seed lasers and is available for the 1.5-micron wavelength range. The amplifier module is designed as a line card for the Koheras ACOUSTIK multi-wavelength system which also supports the Koheras BASIK seed lasers.

The Koheras BOOSTIK fiber amplifier extends the output power of the Koheras BASIK seed laser while preserving the ultra-low noise and narrow linewidth operation.

Designed to preserve the ultra-low phase noise and low RIN of the Koheras seed lasers it is the ideal choice for noise-sensitive applications in high precision metrology, laser cooling, quantum physics and sensing, and various scientific applications.

The amplifier is designed for operation in the 1545-1565 nm range. It is fully compatible with the BASIK E15 and C15 seed laser models and has an optical output power up to 2 W.

Koheras ACOUSTIK modular multi-channel single-frequency laser system

The amplifiers are designed as compact line cards for the Koheras ACOUSTIK multi-wavelength system seeded by our range of ultra-low phase noise single-frequency lasers: E15, X15, and C15. This offers high flexibility and freedom to choose the specific wavelengths and power levels required for each individual user application.

Laser and amplifier wavelengths can be changed to accommodate the system to future user needs which makes the system highly versatile and upgradeable. The amplifier module occupies two slots in the Koheras ACOUSTIK system.


  • Designed for narrow linewidth operation
  • Up to 2 W output
  • Plug and Play
  • Robust and maintenance-free
  • Multi-channel system or stand-alone

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Polarization-maintaining fiber output

The Koheras BOOSTIK amplifier is provided with standard single-mode
fiber or a polarization-maintaining option.

Low-RIN feature

For applications that require low RIN (Relative Intensity Noise), the
Koheras BOOSTIK amplifier can optionally be provided with up to
20 dB reduction in RIN level. For more information, please refer to
the optical product specifications.


Seed laser type E15/X15 1), CW C15, CW
Seed laser linewidth 2) < 0.1 kHZ < 15 kHz
Operating wavelength 1545 - 1565 nm 1545 - 1565 nm
Input power 1 - 50 mW, typ. 40 1 - 50 mW, typ. 10
Output power 2.0 W 2.0 W
Output power tunability 10-100% 10-100%
RIN peak Approx. 0.7 MHz Approx. 1.0 MHz
RIN level < -100 dBc/Hz @ peak < -120 dBc/Hz @ peak
< -135 dBc/Hz @ 10 MHz < -140 dBc/Hz @ 10 MHz
Optical S/N (50 pm res.) > 45 dB > 60 dB
PER > 23 dB > 23 dB
Output isolation > 30 dB > 30 dB
Beam quality, M2 M2 < 1.05 (single-mode fiber terminated)
Control mode Constant pump current, constant power

1) X15 phase noise approx. 20 dB lower in the 1 Hz-10 kHz frequency range compared to E15.
2) Lorenzian.


Power supply 12 VDC
Power consumption < 20 W
Electrical interface 30 pin DIN41612 male
Input optical FC/APC bulkhead
Output optical FC/APC pigtail 1 m
Operating temperature 1) 0 - 50 °C
Storage temperature -20 - 60 °C
Dimensions (WxHxL) 111/92 x 45 x 220 mm
Weight < 1 kg
Humidity non-condensing 0 - 70 %RH