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Proceedings Paper

The adaptive optics and transmit system for NASA's Laser Communications Relay Demonstration project
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Paper Abstract

The Laser Communication Relay Demonstration is NASA’s multi-year demonstration of laser communication to a geosynchronous satellite. We are currently assembling the optical system for the first of the two baseline ground stations. The optical system consists of an adaptive optics system, the transmit system and a camera for target acquisition. The adaptive optics system is responsible for compensating the downlink beam for atmospheric turbulence and coupling it into the modem’s single mode fiber. The adaptive optics system is a woofer/tweeter design, with one deformable mirror correcting for low spatial frequencies with large amplitude and a second deformable mirror correcting for high spatial frequencies with small amplitude. The system uses a Shack- Hartmann wavefront sensor. The transmit system relays four beacon beams and one communication laser to the telescope for propagation to the space terminal. Both the uplink and downlink beams are centered at 1.55 microns. We present an overview of the design of the system as well as performance predictions including time series of coupling efficiency and expected uplink beam quality.

Paper Details

Date Published: 19 September 2016
PDF: 10 pages
Proc. SPIE 9979, Laser Communication and Propagation through the Atmosphere and Oceans V, 99790I (19 September 2016); doi: 10.1117/12.2238589
Show Author Affiliations
Lewis C. Roberts, Jet Propulsion Lab. (United States)
Rick Burruss, Jet Propulsion Lab. (United States)
Santos Fregoso, Jet Propulsion Lab. (United States)
Harrison Herzog, Jet Propulsion Lab. (United States)
Sabino Piazzola, Jet Propulsion Lab. (United States)
Jennifer E. Roberts, Jet Propulsion Lab. (United States)
Gary D. Spiers, Jet Propulsion Lab. (United States)
Tuan N. Truong, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 9979:
Laser Communication and Propagation through the Atmosphere and Oceans V
Alexander M. J. van Eijk; Christopher C. Davis; Stephen M. Hammel, Editor(s)

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