Component-level selection and qualification for the Global Ecosystem Dynamics Investigation (GEDI) laser altimeter transmitter

2018
Flight quality solid-state lasersrequire a unique and extensive set of testing and qualification processes, both at the system and component levels to insure the laser's promised performance. As important as the overall lasertransmitter design is, the quality and performance of individual subassemblies, optics, and electro-opticsdictate the final laserunit’s quality. The Global Ecosystem Dynamics Investigation (GEDI) lasertransmitters employ all the usual components typical for a diode-pumped, solid-state laser, yet must each go through their own individual process of specification, modeling, performance demonstration, inspection, and destructive testing. These qualification processes as well as the test results for the lasercrystals, laserdiode arrays, electro-optics, and optics, will be reviewed as well as the relevant critical issues encountered, prior to their installation in the GEDI flight laserunits.
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