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Proceedings Paper

Wavelength and time-multiplexed multi-channel lidar transmitter for topographic mapping mission
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Paper Abstract

We demonstrate a multi-channel architecture for nsec pulsed lidar transmitter, scalable to larger channel counts via wavelength- and time-multiplexing in a multi-stage Yb-fiber amplifier. This technology enables lidar systems for topographic mapping missions, requiring much greater spatial coverage and range resolution. We demonstrate prototype hardware, where wavelength channels at 1060nm, 1061nm and 1064nm are multiplexed, and precise 1.3nsec pulse using LiNbO3 electro-optic(EO) modulators, at a combined repetition rate of 1MHz, with equal time interleaving between the wavelengths. The multiplexed pulses are amplified to >20W average power, in an optimized three-stage Yb-fiber amplifier system. We show simple de-multiplexing and frequency-doubling of one of the wavelengths (1064nm). Highspeed FPGA based control provides for independent and programmable control of the pulse rate, timing trigger, pulsewidth, and the intra-pulse-pattern for improved detection schemes.

Paper Details

Date Published: 15 February 2011
PDF: 8 pages
Proc. SPIE 7912, Solid State Lasers XX: Technology and Devices, 791203 (15 February 2011); doi: 10.1117/12.876201
Show Author Affiliations
Youming Chen, Fibertek, Inc. (United States)
Frank Kimpel, Fibertek, Inc. (United States)
Jean-Luc Fouron, Fibertek, Inc. (United States)
Jeffrey Chen, NASA Goddard Space Flight Ctr. (United States)
Shantanu Gupta, Fibertek, Inc. (United States)

Published in SPIE Proceedings Vol. 7912:
Solid State Lasers XX: Technology and Devices
W. Andrew Clarkson; Norman Hodgson; Ramesh Shori, Editor(s)

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