Optical isolators for high-power laser applications

SpaceTech develops optical isolators for satellite-based high-power laser applications, able to withstand launch loads and the space environment for a reliable long term operation.
In contrast to commercial devices, SpaceTech’s isolators feature a hardware completely free of organic material (no adhesives, no plastics), meeting the specific cleanliness requirements of space missions.

SpaceTech optical components optical isolatorOptical Isolator, flight Hardware for MERLIN

Key features of STI optical isolators

  • Zero outgassing/adhesive free
  • Vacuum compatible
  • Radiation hardness

An example of the application for the optical Isolators of STI is the German-French Methane Lidar MERLIN, which is performed in under contract and in collaboration with Fraunhofer Institute for Laser Technology (ILT) in Aachen, Germany. It features the follwing key charactistics:

Key Characteristics

 Operational wavelength  1064 nm (*others on request)
 Free aperture  4 mm
 Damage threshold  10 J/cm2 @ 10 ns
 Isolation  > 30 dB
 Transmission loss  < 0.2 dB
 Temperature range  -40°C to +50°C
 Size (w/o polarizers)  64 x 41.5 x 40 mm3
 Design loads  50 g
 Mass  390 g

SpaceTech is capable to deliver the full development and production chain inhouse: design of magnet field, optical design, thermal and structural analysis, manufacturing, assembly, and qualification testing. Thus allowing for a maximum in customization.