Industrial reliability

We know that uptime is important to you. Our Koheras fiber lasers are inherently stable. They are reliable, alignment-free, and maintenance-free. You can mount them in a rack or place them upside down, they just do their job. Others even trust our Koheras lasers enough to send them into space. And should you need support, we have a team of dedicated engineers ready to help.  

15,000 Koheras lasers have been installed in demanding industrial applications for decades. Now, they are ready to assist you in your quantum research.  

Ultra-low noise

The HARMONIK HP systems offer an ultra-low phase noise as well as low RIN. The RIN is preserved from the pump laser while the linewidth is doubled.

Unique fiber delivery system 

Do you want to mount the laser system in a rack? No problem. With the unique fiber delivery system, you can get light wherever you want. The fiber delivery solution handles high power, preserves the low-noise laser properties, and delivers single-mode light at all wavelengths.  

Fast wavelength modulation

The systems are equipped with easy and user-friendly fast wavelength modulation. This feature is typically used to lock the laser to an external stable reference — such as an atomic transition line or interferometer — to obtain even higher wavelength stability than provided by the free-running laser.

The HARMONIK systems offer a 15 GHz mode hop-free tunability with a 10% power change.

Thermal tuning

All Koheras fiber lasers are equipped with thermoelectric temperature controllers (TECs).

The TECs stabilize the operation of the laser and make it insensitive to environmental temperature fluctuations. The TECs also make it possible to tune the center wavelength by changing the operating temperature of the laser.

At standard room temperature (around 20-30°C or 68-86°F) the laser can be thermally tuned to an industry-leading 500 pm.

Free-space or fiber output

As default, the HARMONIK HP systems come with free-space output. If fiber coupling is needed, we can propose an efficient coupling via our unique polarization-maintaining single-mode photonic crystal fiber that ensures high-power delivery.

Our pre-angled fiber couplers are easy and fast to align. They give a very high coupling efficiency, which does not decrease significantly over time, so it is possible to obtain a long-term stable coupling.

Looking for a Titanium-Sapphire substitute?

You can successfully replace Ti:Sapphire lasers with Koheras HARMONIK HP fiber laser systems to get a stable alternative with high power and a narrow linewidth.

More details on noise and linewidth

If you want more details about phase noise, spectral linewidth, frequency stability, or how to wavelength tune your Koheras laser, we have some application notes for you.

Laser phase noise is a frequency-domain view of the noise spectrum around the laser signal. Read more about phase noise in single-frequency lasers.

Spectral linewidth is a measure of the spectral content of the laser light. Read more about linewidth measurement methods.

The laser’s frequency stability is often described in terms of its spectral linewidth. However, this term lacks detail about the laser frequency noise which is often critical in laser applications. Read the analysis of the laser frequency stability using beat-note measurement.

The wavelength of the laser is controlled by the temperature and strain of the DFB cavity. Learn how to tune your Koheras laser.