Computer Science – Performance
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1131...10f&link_type=abstract
IN: Optical space communication; Proceedings of the Meeting, Paris, France, Apr. 24-26, 1989 (A90-38001 16-17). Bellingham, WA,
Computer Science
Performance
Communication Satellites, Optical Communication, Satellite Communication, Semiconductor Lasers, Spaceborne Lasers, Synchronous Satellites, Block Diagrams, Channels (Data Transmission), Laser Beams, Laser Mode Locking, Nasa Space Programs
Scientific paper
NASA-Goddard has undertaken the development of direct-detection optical communications for space applications at the Gbps data rate channel capability level. The primary challenges to optical communications designers lie in the development of reliable optical power sources, as well as of high performance pointing/acquisition/tracking systems required by the narrow widths of the transmitted optical beams. GaAlAs diodes and their arrays are currently the most attractive technology for optical transmitters; pioneering work has also been conducted on dichroic and grating techniques for combining the power of several laser diodes. Attention is given to the performance obtained for an optical link acquisition and submicroradian tracking/pointing system.
Bruno Roberto
Fitzmaurice Michael
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