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Proceedings Paper

Double-pass Tm:Ho:YLF amplifier at 2.05 um for spaceborne eye-safe coherent Doppler wind lidar and CO2 differential absorption lidar (DIAL)
Author(s): Songsheng Chen; Jirong Yu; Mulugeta Petros; Upendra N. Singh; Yingxin Bai
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Paper Abstract

Accurate global atmospheric remote sensing such as wind and carbon-oxide concentration profiling requires a coherent Doppler lidar and a Differential Absorption Lidar (DIAL) in an eye-safe spectrum range, respectively. Both Doppler lidar and DIAL should have laser transmitters with high pulse energy and high efficiency. There is no doubt that a Tm:Ho:YLF or Tm:Ho:LuLF laser oscillator with multistage amplifiers are appropriate candidates for these transmitters, especially for space-borne lidar systems. To achieve a high efficient laser transmitter, a collinear double-pass Tm:Ho:YLF laser amplifier has been designed and experimentally tested with a Tm:Ho:YLF laser oscillator. When laser pulses at a reasonably high energy, said 50 mJ here, from a Q-switched Tm:Ho:YLF laser oscillator were directly sent into a single-pass Tm:Ho:YLF amplifier, a gain of 1.86 was obtained at a pump pulse energy of 5.82 J. With a collinear double-pass configuration, a gain of 2.24 was achieved at same pump pulse energy level including all losses of the necessary optical elements, such as a thin film polarizer, a half-wave plate, and a Faraday rotator. More than 95% pulse energy was extracted from the double-pass amplifier, compared to a single-pass amplifier.

Paper Details

Date Published: 21 March 2003
PDF: 6 pages
Proc. SPIE 4893, Lidar Remote Sensing for Industry and Environment Monitoring III, (21 March 2003); doi: 10.1117/12.466658
Show Author Affiliations
Songsheng Chen, Science Applications International Corp. (United States)
Jirong Yu, NASA Langley Research Ctr. (United States)
Mulugeta Petros, Science and Technology Corp. (United States)
Upendra N. Singh, NASA Langley Research Ctr. (United States)
Yingxin Bai, Science Applications International Corp. (United States)

Published in SPIE Proceedings Vol. 4893:
Lidar Remote Sensing for Industry and Environment Monitoring III
Upendra N. Singh; Toshikasu Itabe; Zhishen Liu, Editor(s)

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