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Proceedings Paper

51W, 1.5um, 7 WDM (25nm) channels PPM downlink Tx and 500W, 1um, uplink PPM Tx for deep space lasercom
Author(s): Doruk Engin; Joe Rudd; Khoa Le; Kent Puffenberger; He Cao; Nick Sawruk; Brian Mathason; Andrew Schober; Mark Storm
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Paper Abstract

This paper describes progress toward a space -based 51 W average power amplifier for deep space PPM and Earth GEO links. We demonstrated a broadband WDM amplification at 50W with flat gain across a 25 nm bandwidth. Similarly, for 5 W amplifier we demonstrated a flat gain across a 32 nm bandwidth. These amplifiers demonstrate the feasibility for multi-channel space optical communications links. To increase the bandwidth GEO links to multi-Tbps and deep space links to > Gbps. The laser supports kW/channel SBS limited peak power for PPM and achieves an optical-to-optical efficiency of > 40%. In a separate but related effort for a deep space uplink beacon, we achieved 500 W average power, 2.6 kW peak power PPM (2,2) for a 1 μm uplink transmitter. Reliable SBS free operation is achieved with phase modulation resulting in 26 GHz transmitter linewidth. Uplink transmitter is optimized for 65 usec (pulsewidth) slot size—achieving fastest possible rise/fall times (<10 usec) and pulse uniformity.

Paper Details

Date Published: 8 March 2019
PDF: 8 pages
Proc. SPIE 10910, Free-Space Laser Communications XXXI, 109100L (8 March 2019); doi: 10.1117/12.2513801
Show Author Affiliations
Doruk Engin, Fibertek, Inc. (United States)
Joe Rudd, Fibertek, Inc. (United States)
Khoa Le, Fibertek, Inc. (United States)
Kent Puffenberger, Fibertek, Inc. (United States)
He Cao, Fibertek, Inc. (United States)
Nick Sawruk, Fibertek, Inc. (United States)
Brian Mathason, Fibertek, Inc. (United States)
Andrew Schober, Fibertek, Inc. (United States)
Mark Storm, Fibertek, Inc. (United States)

Published in SPIE Proceedings Vol. 10910:
Free-Space Laser Communications XXXI
Hamid Hemmati; Don M. Boroson, Editor(s)

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