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Cooling an optical laser with
high-purity helium

Cooling an optical laser
with high-purity helium

Vue dessus LN2 tank 2

Cooling of an optical laser with high-purity helium using a venturi system and hydrodynamic gas-bearing circulators.

Closed helium loop
for laser amplifier

Closed helium loop
for laser amplifier 

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Absolut System has successfully developed and manufactured a helium loop for cryogenic cooling of a 140K laser amplifier.

The entire laser system is being developed in collaboration between the STFC (Science and Technology Facilities Council) research organization and the Hilase Centre, where the finished device will be based.

The objective was to maintain an optical laser amplifier with helium at cold temperature (140K or -133°C), without emitting impurities (particulate and molecular), while adsorbing the 4kW power output by the amplifier.

Completed in April 2022, this project has gone through a period of testing and validation:

  • January 2022: In-house Factory Acceptance Test (FAT).
  • April 2022: Delivery and installation of the machine in STFC's laboratories for the SAT (Site Acceptance Test) and training of operators in its use. This mission took 3 days.
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This unique project is based on Absolut System’s expertise in cryogenics. The expertise of our engineers has enabled us to propose two innovative technologies: