Acetylene locked lasers

Are you looking for a laser with superior long-term mode-hop-free stability as a foundation for your acetylene-locked laser? High long-term stability and a well-defined reference wavelength are essential for locking and stabilizing the wavelength in e.g. frequency combs, spectroscopy, metrology, or laser cooling and trapping.

Get stability and narrow linewidth with the Koheras BASIK X15

With the Koheras BASIK X15, you get a stable, ultra-narrow linewidth fiber laser with intrinsically low phase noise. Lock it to acetylene to get an even higher long-term stability. Optimized for 1542 nm, our BASIK X15 laser has become the preferred foundation for a rock-steady acetylene-locked laser.

On top, the BASIK X15 is mode-hop-free and gives you the narrowest linewidth on the market, just 0.1 kHz.

Phase noise specifications:

 BASIK X15
Max. phase noise-105 dB((Rad/√Hz)/m)@ 1 Hz
-125 dB((Rad/√Hz)/m)@ 10 Hz
-130 dB((Rad/√Hz)/m)@ 100 Hz
-128 dB((Rad/√Hz)/m)@ 1 kHz
Max. phase noise3.1 (µrad/√Hz)/m@ 1 Hz
0.6 (µrad/√Hz)/m @ 10 Hz
0.3 (µrad/√Hz)/m @ 100 Hz
0.4 (µrad/√Hz)/m @ 1 kHz

See all the Koheras BASIK X15 specifications on the product page.

Unique fiber delivery system 

Do you want to mount the laser system in a rack? No problem. With our unique fiber delivery system, aeroGUIDE POWER, 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.  

This laser is 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 OEM 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 Danish National Metrology Institute and the Quantum Optics and Photonics lab at the Niels Bohr Institute.

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.

Contact us now

References

Our quantum engagements

We are part of the European Quantum Flagship, the European Quantum Industry Consortium, the Quantum Economic Development Consortium, and the Danish Quantum Community.

NV centers are defects in the diamond crystal lattice. Each defect act as if a single fluorescing atom is already trapped in its lattice.

An NV center in a diamond typically absorbs light between 450 nm and 650 nm and emits light in the 600 nm to 800 nm range. The electronic spin-state of this atom-like defect can further be manipulated by applying a magnetic field, electric field, microwave radiation or light, or a combination, resulting in sharp resonances in the intensity and wavelength of the photoluminescence.

Operation at room temperature

Since NV centers can be stably operated at room temperature, spin states in NV centers are a promising candidate for a room-temperature qubit platform for quantum computers. There is still a lot we do not understand about the electronic states, and researchers investigate the fluorescence dynamics of the absorption and emission regions.

Use a broadband tunable laser

Addressing the entire wavelength region from 450 nm to 650 nm is not easy with conventional lasers. Many researchers rely on supercontinuum light sources, like our tunable SuperK CHROMATUNE or SuperK FIANIUM, to get tunability across the entire region and perfect beam quality.

Contact us now

References

Our quantum engagements

We are part of the European Quantum Flagship, the European Quantum Industry Consortium, the Quantum Economic Development Consortium, and the Danish Quantum Community.

Accurate quantum gravity sensors

Quantum gradiometers, gravity sensors, or gravimeters, allow you to accurately map local variations in gravity to ensure infrastructure integrity and safer constructions. They are great tools for, e.g., civil engineers, land surveyors, and railroad companies.

The most sensitive gravity sensors use atom interferometry on atoms cooled close to absolute zero and placed in a free fall. In a free fall, the distance traveled over a period of time is determined by the local gravitational pull.

You need accurate lasers to cool atoms

Laser cooling is a critical step that requires a tunable narrow-linewidth high-power laser such as our Koheras BASIK. Rubidium atoms are typically cooled in a magneto-optical trap, MOT. A MOT uses a combination of magnetic fields and a narrow-linewidth high-power laser at 780 nm to cool and trap the atoms and place them in an appropriate quantum state for further investigation by, e.g., atom interferometry.

We shoot light pulses at atoms as they undergo free fall. Each atom has a certain probability of absorbing a light pulse, and if it does, it slows down. The atoms that are slowed down do not travel as far as those not slowed down, which leads to two vertically separated outcomes with a relative distance determined by the gravitational pull.

Rubidium atoms are often used in gravitational sensors. If you carefully observe the free-fall acceleration, you can determine the local gravity and reveal even the tiniest variations created by dense objects or underground cavities.

Pick a stable laser

When you look for a laser for a gravitational sensing system, pick a stable one. The system will be moved around a lot and must keep its stability and precision. A fiber laser is a good choice because it contains no moving parts and is intrinsically stable.

The Koheras DFB fiber lasers are well known for their unmatched Hz-level linewidth at watt-power levels. But DFB fiber lasers only come in a few infrared wavelength bands. And these bands rarely match the wavelengths needed for laser cooling of atoms and ions.

Frequency conversion gives you 780 nm

We suggest seeding an Erbium-Doped Fiber Amplifier (EDFA), such as the Koheras BOOSTIK HP, with a stable narrow linewidth seed laser such as the Koheras BASIK at 1560 nm. Use the Koheras HARMONIK frequency conversion module to efficiently convert the high-power light at 1560 nm into high-power light at 780 nm.

You get a 780 nm fiber laser system at watt level with a beam quality M2 ≈ 1.1 and a free-running linewidth less than 1 kHz – the ideal laser system for any Rb atom interferometer.

Frequency conversion is a nonlinear process. The HARMONIK frequency conversion module only converts the main laser signal while cleaning up any unwanted power at out-of-band wavelengths present in most lasers.

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 OEM 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 UK Quantum Technology Hub for Sensors and Timing at the University of Birmingham and the Institute of Quantum Optics at Leibniz University Hannover.

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.

Contact us now

References

Our quantum engagements

We are part of the European Quantum Flagship, the European Quantum Industry Consortium, the Quantum Economic Development Consortium, and the Danish Quantum Community.

Accurate quantum inertial sensors

If you can track your rotation and acceleration in any direction over time, you can calculate your exact position and velocity relative to your starting point – without relying on external input such as GPS or landmarks.

The accuracy of your inertial sensor determines the accuracy of your position and velocity derived from the measured acceleration. Today, the most accurate inertial sensors are based on atom interferometry which is created by cooling and manipulating individual (typically alkaline) atoms with laser beams.

A popular choice of atom for atom interferometry is Rubidium-87 which requires a high power 780 nm beam of light with narrow linewidth and high beam quality.

You need accurate lasers to cool atoms

Laser cooling is a critical step that requires a tunable narrow-linewidth high-power laser such as our Koheras BASIK. The rubidium ions are typically cooled in a magneto-optical trap, MOT. A MOT uses a combination of magnetic fields and a narrow-linewidth high-power laser at 780 nm to cool and trap the ions to place them in an appropriate quantum state for further investigation by, e.g., atom interferometry.

Atom interferometry

Atom interferometry uses the wave property of atoms to place an atom in a superposition between two states: One state where the atom has been “hit” by a light pulse, and one where it was not. Something that will send the two states along different paths.

Just as light, these two states can undergo interference if brought back together. Any perturbation along their paths, such as the forces from rotational or translational acceleration will affect how the matter-wave interference pattern turns out.

Pick a stable laser

The Koheras DFB fiber lasers are well known for their unmatched Hz-level linewidth at watt-power levels. But DFB fiber lasers only come in a few infrared wavelength bands. And these bands rarely match the wavelengths needed for laser cooling of atoms and ions.

Frequency conversion gives you 780 nm

We suggest seeding an Erbium-Doped Fiber Amplifier (EDFA), such as the Koheras BOOSTIK HP, with a stable narrow linewidth seed laser such as the Koheras BASIK at 1560 nm. Use the Koheras HARMONIK frequency conversion module to efficiently convert the high-power light at 1560 nm into high-power light at 780 nm.

You get a 780 nm fiber laser system at watt level with a beam quality M2 ≈ 1.1 and a free-running linewidth less than 1 kHz – the ideal laser system for any Rb atom interferometer.

Frequency conversion is a nonlinear process. The HARMONIK frequency conversion module only converts the main laser signal while cleaning up any unwanted power at out-of-band wavelengths present in most lasers.

Robust enough for oil rigs and 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 OEM 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 Institute of Quantum Optics at Leibniz University Hannover and the UK Quantum Technology Hub for Sensors and Timing 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.

Contact us now

References

Our quantum engagements

We are part of the European Quantum Flagship, the European Quantum Industry Consortium, the Quantum Economic Development Consortium, and the Danish Quantum Community.

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