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Proceedings Paper

Nonlinearity mitigation of a 40-Watt 1.55-micron uplink transmitter for lunar laser communications
Author(s): R. T. Schulein; R. E. Lafon; M. B. Taylor; P. A. MacKoul; J. J. Carney; M. L. Stevens; B. S. Robinson; S. Constantine; M. M. Willis; D. W. Peckham; B. Zhu; J. M. Fini; David O. Caplan
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Paper Abstract

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.

Paper Details

Date Published: 19 March 2013
PDF: 9 pages
Proc. SPIE 8610, Free-Space Laser Communication and Atmospheric Propagation XXV, 86100F (19 March 2013); doi: 10.1117/12.2010025
Show Author Affiliations
R. T. Schulein, MIT Lincoln Lab. (United States)
R. E. Lafon, NASA Goddard Space Flight Ctr. (United States)
M. B. Taylor, MIT Lincoln Lab. (United States)
P. A. MacKoul, MIT Lincoln Lab. (United States)
J. J. Carney, MIT Lincoln Lab. (United States)
M. L. Stevens, MIT Lincoln Lab. (United States)
B. S. Robinson, MIT Lincoln Lab. (United States)
S. Constantine, MIT Lincoln Lab. (United States)
M. M. Willis, MIT Lincoln Lab. (United States)
D. W. Peckham, OFS Fitel LLC (United States)
B. Zhu, OFS Labs. (United States)
J. M. Fini, OFS Labs. (United States)
David O. Caplan, MIT Lincoln Lab. (United States)

Published in SPIE Proceedings Vol. 8610:
Free-Space Laser Communication and Atmospheric Propagation XXV
Hamid Hemmati; Don M. Boroson, Editor(s)

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