A comparison of optical technologies for a high data rate Mars link

Details A comparison of optical technologies for a high data rate Mars link A comparison of optical technologies for a high data rate Mars link

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991asei.confs....s&link_type=abstract

AIAA, NASA, and OAI, Conference on Advanced SEI Technologies, Cleveland, OH, Sept. 4-6, 1991. 14 p.

Physics

Data Links, Information Transfer, Interplanetary Communication, Manned Mars Missions, Nasa Space Programs, Optical Communication, Analytic Functions, Carbon Dioxide Lasers, Relay Satellites, Semiconductor Lasers, Yag Lasers

Scientific paper

Several optical systems, based on Nd:YAG, GaAs, and CO2 laser sources and employing both direct and heterodyne detection, are analyzed in order to assess their feasibility in providing high data rate (10-1000 Mbps) Mars-to-earth communications. The rms pointing/tracking accuracy is shown to be a critical parameter in defining the Mars-earth optical link. Data obtained reveal that unless, extremely small rms pointing and tracking errors can be achieved (sigma less than .2 microrad), the most promising optical implementation appears to be the Nd:YAG laser using direct detection and high order PPM modulation.

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