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Proceedings Paper

Design of a 2.5-Gbps optical transmitter for the International Space Station
Author(s): Gerry G. Ortiz; Muthu Jeganathan; John V. Sandusky; Hamid Hemmati
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Paper Abstract

A high data rate laser transmitter assembly (LTA) has been designed as the source for an optical free-space communication link between the International Space Station and the 1-meter Optical Communication Telescope Laboratory (OCTL) to be built at the Table Mountain Facility (TMF, Wrightwood, CA). the transmitter design concept uses a fiber-based master oscillator power amplifier (MOPA) configuration with an average output power of 200 mW at a 1550 nm transmit wavelength. This transmitter source is also designed to provide a signal at 980 nm to the silicon-based focal plane array for the point-ahead beam control function. This novel integration of a 980 nm boresight signal allows the use of silicon based imagers for the acquisition/tracking and point- ahead functions, yet permits the transmit signal to be at any wavelength outside the silicon sensitivity. The LTA, a sub- system of the Flight Terminal, has been designed to have a selectable data rate from 155 - 2500 Mbps in discrete steps. It also incorporates a 2.5 Gbps pseudo-random bit sequence (PRBS) generator for complete link testing and diagnostics. The design emphasizes using commercial off the shelf components (COTS).

Paper Details

Date Published: 26 April 1999
PDF: 6 pages
Proc. SPIE 3615, Free-Space Laser Communication Technologies XI, (26 April 1999); doi: 10.1117/12.346177
Show Author Affiliations
Gerry G. Ortiz, Jet Propulsion Lab. (United States)
Muthu Jeganathan, Jet Propulsion Lab. (United States)
John V. Sandusky, Jet Propulsion Lab. (United States)
Hamid Hemmati, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 3615:
Free-Space Laser Communication Technologies XI
G. Stephen Mecherle, Editor(s)

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