Koheras single-frequency lasers are longitudinally single-mode with ultra-low phase and intensity noise. They are available in erbium, ytterbium, and thulium wavelength ranges, with frequency conversion to many other bands.
Reliability is our highest priority, and the all-fiber DFB design ensures mode-hop-free and reliable operation for thousands of hours.
Our all-fiber DFB design ensures robust, mode-hop-free operation with unmatched stability – even under changing environmental conditions. For applications requiring ultra-low intensity noise, shot noise-limited options are available.
Find the right laser
Koheras fiber lasers come in three configurations: OEM modules, modular line card systems, and desktop units. Each delivers scientific-grade performance in a compact, industrial package with market-leading reliability.
Proven reliability
Our most popular Koheras single-frequency laser, the MIKRO OEM laser module, has a typical lifetime of more than 10 years and a return rate of less than 1%.
Since 1998, we have shipped over 20,000 Koheras lasers, valued for their narrow linewidth, high-frequency stability, low noise, and manufacturing scalability.
Rigorous testing
We have exposed our Koheras MIKRO E15 fiber lasers to extensive qualification tests, including mechanical shock, vibration, temperature cycling, powered damp heat, and high-temperature operation, conducted by FORCE Technology. The results confirm their robustness, with critical optical performance remaining well within tolerances.
Install and forget
Designed for reliability, our maintenance-free Koheras MIKRO lasers operate in extreme environments – on oil rigs, submarines, wind turbines, and even in space – thanks to the fundamentally robust and reliable laser design.
Precison and stability
Koheras lasers feature a Distributed Feedback (DFB) fiber laser design, comprising an active fiber, Bragg grating, and semiconductor pump diode. The erbium, ytterbium, and thulium-doped gain media ensure high performance across different wavelengths.
The Bragg grating is imprinted onto the fiber through ultra-violet illumination via a phase mask and acts as the laser cavity’s mirror. A pump laser generates population inversion in the active fiber, driving the system.
Guaranteed mode-hop-free performance for life
The Koheras fiber lasers are inherently stable. The key to the low noise is its gain medium and fundamental structure. The high-Q-value fiber Bragg grating ensures stable emission and high-frequency stability.
Various phase noise grades and coarse and fine precise wavelength tuning enable alignment with atomic transitions and stabilization to fixed references, enhancing frequency stability beyond free-running operation.
Due to its intrinsic low-noise design, you get sub-picometer stability and mode-hop-free performance throughout the lifetime of the laser.
Rugged, robust, and reliable
Built with Telcordia-qualified components, Koheras lasers require no servicing. Deployed in the harshest environments – from industrial sensing to space missions – they minimize downtime and ensure long-term reliability.
The laser package – as well as the all-fiber design – resists acoustic interference, vibration, and temperature shifts. This is important for applications such as long-range fence security, pipeline integrity monitoring, on oil rigs, for subsea sensing, high-precision vibrometry, and wind LIDARs.
Whether mounted upside-down, installed in deserts, or subjected to movement, Koheras lasers remain stable and perform flawlessly.
Driving scientific discovery
Beyond industrial applications, Koheras lasers play a vital role in scientific research, including metrology, atomic clocks, quantum computing, and high-resolution spectroscopy.
They contribute to groundbreaking projects like fusion energy research, the Atacama Large Millimeter Array (ALMA) radio telescope, and the European Space Agency’s SWARM mission.
With unparalleled stability, low noise, and reliability, Koheras lasers continue to push the boundaries of precision laser technology across industries and scientific disciplines.
