19 March 2013 Nonlinearity mitigation of a 40-Watt 1.55-micron uplink transmitter for lunar laser communications
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Improvements to a ground-based 40W 1.55 micron uplink transmitter for the Lunar Laser Communications Demonstration (LLCD) are described. The transmitter utilizes four 10 W spatial-diversity channels to broadcast 19.4 - 38.9 Mbit/s rates using a variable-duty cycle 4-ary pulse position modulation. At the lowest rate, with a 32-to-1 duty cycle, this leads to 320 W peak power per transmitter channel. This paper discusses a simplification of the transmitter that uses super-large-area single mode fiber and polarization control to mitigate high peak power nonlinear impairments.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
R. T. Schulein, R. T. Schulein, R. E. Lafon, R. E. Lafon, M. B. Taylor, M. B. Taylor, P. A. MacKoul, P. A. MacKoul, J. J. Carney, J. J. Carney, M. L. Stevens, M. L. Stevens, B. S. Robinson, B. S. Robinson, S. Constantine, S. Constantine, M. M. Willis, M. M. Willis, D. W. Peckham, D. W. Peckham, B. Zhu, B. Zhu, J. M. Fini, J. M. Fini, David O. Caplan, David O. Caplan, "Nonlinearity mitigation of a 40-Watt 1.55-micron uplink transmitter for lunar laser communications", Proc. SPIE 8610, Free-Space Laser Communication and Atmospheric Propagation XXV, 86100F (19 March 2013); doi: 10.1117/12.2010025; https://doi.org/10.1117/12.2010025


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