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Proceedings Paper

Design of a 40-Watt 1.55μm uplink transmitter for Lunar Laser Communications
Author(s): D. O. Caplan; J. J. Carney; R. E. Lafon; M. L. Stevens
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Paper Abstract

A ground-based 40W 1.55μm uplink transmitter for lunar laser communications is described. The transmitter, which generates wavelength multiplexed communication and beacon signals, is implemented using four 10W spatial-diversity channels to reduce far-field atmospheric-turbulence-induced fading and facilitate high-power signal generation via parallel-spatial-combining of commercially-available EDFAs. Each transmitter channel can generate a 1 kHz modulated beacon for spatial acquisition, and a multi-rate 4-PPM communication signal at a 311 MHz slot rate with 16:1 and 32:1 duty cycles to support 38.9 Mbit/s and 19.4 Mbit/s channel rates, respectively. Details on the transmitter design, including the mitigation of optical nonlinear effects are discussed.

Paper Details

Date Published: 23 February 2012
PDF: 9 pages
Proc. SPIE 8246, Free-Space Laser Communication Technologies XXIV, 82460M (23 February 2012); doi: 10.1117/12.915982
Show Author Affiliations
D. O. Caplan, MIT Lincoln Lab. (United States)
J. J. Carney, MIT Lincoln Lab. (United States)
R. E. Lafon, NASA Goddard Space Flight Ctr. (United States)
M. L. Stevens, MIT Lincoln Lab. (United States)

Published in SPIE Proceedings Vol. 8246:
Free-Space Laser Communication Technologies XXIV
Hamid Hemmati; Don M. Boroson, Editor(s)

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