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Beam Parameter Product Optimization for High Power SWIR Laser Diode Stack Fiber Coupling
Optics and Photonics Journal
An optimized setup for fiber optic injection of a kilowatt peak power laser diode stack emitting in the SWIR spectral range is proposed. Starting from a fast axis collimated (FAC) and slow axis collimated (SAC) 15 bars, 19 emitters off the shelf laser diode stack, the beam is transformed using spatial beam combining and polarization coupling. Both techniques integrated in a compact design enable to couple the kilowatt level beam into a standard 600 µm core, 0.22 numerical aperture (NA)doi:10.4236/opj.2022.122002 fatcat:kbumxjhi25hbxgwt6jwfvrlmxe