Design of a 40-Watt 1.55µm uplink transmitter for Lunar Laser Communications

D. O. Caplan; J. J. Carney; R. E. Lafon; M. L. Stevens

doi:10.1117/12.915982

22 February 2012 Design of a 40-Watt 1.55μm uplink transmitter for Lunar Laser Communications

D. O. Caplan, J. J. Carney, R. E. Lafon, M. L. Stevens

Proceedings Volume 8246, Free-Space Laser Communication Technologies XXIV; 82460M (2012) https://doi.org/10.1117/12.915982
Event: SPIE LASE, 2012, San Francisco, California, United States

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.

Citation Download Citation

D. O. Caplan, J. J. Carney, R. E. Lafon, and M. L. Stevens "Design of a 40-Watt 1.55μm uplink transmitter for Lunar Laser Communications", Proc. SPIE 8246, Free-Space Laser Communication Technologies XXIV, 82460M (22 February 2012); https://doi.org/10.1117/12.915982

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