Computer Science
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1059..146h&link_type=abstract
IN: Space sensing, communications, and networking; Proceedings of the Meeting, Los Angeles, CA, Jan. 16-18, 1989 (A90-31926 13-1
Computer Science
Environmental Tests, Laser Pumping, Semiconductor Lasers, Thermal Cycling Tests, Vibration Tests, Yag Lasers, Arrays, Neodymium Lasers, Semiconductor Diodes, Temperature Gradients
Scientific paper
Results of the environmental test of a compact, rigid and lightweight diode-laser-pumped Nd:YAG laser module are discussed. All optical elements are bonded onto the module using space applicable epoxy, and two 200 mW diode laser arrays for pump sources are used to achieve 126 mW of CW output with about 7 percent electrical-to-optical conversion efficiency. This laser assembly and a set of 20 semiconductor diode laser arrays were environmentally tested by being subjected to vibrational and thermal conditions similar to those experienced during launch of the Space Shuttle, and both performed well. Nevertheless, some damage to the laser front facet in diode lasers was observed. Significant degradation was observed only on lasers which performed poorly in the life test. Improvements in the reliability of the Nd:YAG laser are suggested.
Hemmati Hamid
Lesh Janet Rountree
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