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Koheras Harmonik - a laser for rubidium cooling applications

Date Announced: 17 Aug 2021

Are you looking for a laser for rubidium cooling for applications such as gravimeters, quantum computers, or inertial sensors? A mode-hop-free and a low phase-noise laser that ensures efficient cooling? A laser with a high power to maximize the number of cooled atoms? Have it all with the Koheras Harmonik.


We suggest you go for our high-powered, frequency-doubled Koheras HARMONIK fiber laser system. This system gives you a unique combination of high power, low noise, excellent beam quality, and a narrow linewidth. 

Do you need more details? With the HARMONIK, you can get an output power of > 8 W at 780 nm, a beam quality of M2 < 1.1, and a linewidth of < 30 kHz or < 0.4 kHz depending on the model. It’s mode-hop-free, and here you can get an overview of the noise data:

Max. phase noise -66dB((rad/√Hz)/m)@10Hz
RIN peak Appr. 1.0 MHz Appr. 0.7 MHz
RIN level < -117 dBc/Hz @ peak
< -137 dBc/Hz @ 10 MHz
< -97 dBc/Hz @ peak
< -132 dBc/Hz @ 10 MHz
Optical S/N (50 pm res.) > 50 dB > 50 dB

Visit the HARMONIK product page for more information.

Robust enough for oil rigs yet sophisticated enough for the lab

Our fiber laser design is inherently compact and robust. It is developed for a lifetime of above 10 years in demanding environments where uptime is critical. With failure rates lower than 1%, we proudly deliver the most reliable low-noise lasers on the market. Alignment-free and maintenance-free.

The industrial-grade lasers have a rugged design, a stable performance unaffected by changing environmental conditions, and wide temperature ranges in the field as well as the lab. We deliver lasers to the most advanced laboratories worldwide such as The Quantum Hub at the University of Birmingham.

We have more than 15,000 Koheras lasers deployed in the harshest environments on – and off – the planet. We have lasers on oil rigs, submarines, wind turbines, and even in space. With over 20 years of experience, we know they last. Also in your lab.

What have others done with our Koheras lasers?



Blokken 84
DK-3460 Birkerød
Tel. +45 4348 3900
Fax. +45 4348 3901

E-mail: https://www.nktphotonics.com/lasers-fibers/contact/

Web Site: https://www.nktphotonics.com/

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