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4 March 2019 Spaceflight 100W, 1940nm polarization maintaining Tm doped fiber laser for pumping Q-switched 2μm Ho:YLF
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Abstract
Fibertek has designed and is building a spaceflight (TRL 5-6) high-efficiency, high reliability (97.2% for 5-year mission) 100 W average, 1940 nm thulium doped fiber laser (TDFL) meeting all requirements for a NASA Earth Science spaceflight 2 μm Ho:YLF pump laser. These include polarization extinction ratio <16dB, diffraction limited beam quality, narrow linewidth (0.35nm) and >50% optical to optical efficiency. High reliability laser package, optimized for space environment and SWAP has size 10.6”x13.8”x4.4”and weight 30lbs. A summary of laser package design is presented, including structural and thermal analysis. Preliminary environmental testing results of the space laser are also presented. A spaceflight 100 W PM Tm laser provides a path to space for a pulsed, Q-switched 2 μm Ho:YLF laser with ~80 mJ/pulse at 100-200 Hz.
© (2019) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Doruk Engin, Slava Litvinovitch, Mark Long, He Cao, and Mark Storm "Spaceflight 100W, 1940nm polarization maintaining Tm doped fiber laser for pumping Q-switched 2μm Ho:YLF", Proc. SPIE 10899, Components and Packaging for Laser Systems V, 108990H (4 March 2019); https://doi.org/10.1117/12.2507905
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