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Optical Engineering

High-energy 2 μm Doppler lidar for wind measurements
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Paper Abstract

A coherent Doppler lidar at 2 μm wavelength has been built with higher output energy (100 mJ) than previously available. The laser transmitter is based on diode-pumped Ho:Tm:LuLiF, a recently developed laser material that allows more efficient energy extraction. Single-frequency operation is achieved by a ramp-and-fire injection seeding technique. An advanced photodetector architecture is used incorporating photodiodes in a dual-balanced configuration. A digital signal processing system has been built, allowing real-time display of wind and aerosol backscatter data products. The high pulse energy and receiver efficiency provides for measurement of wind fields to ranges not seen before with 2 μm lidars, and example wind measurements were made to show this capability.

Paper Details

Date Published: 1 November 2007
PDF: 14 pages
Opt. Eng. 46(11) 116201 doi: 10.1117/1.2802584
Published in: Optical Engineering Volume 46, Issue 11
Show Author Affiliations
Grady J. Koch, NASA Langley Research Ctr. (United States)
Jeffrey Y. Beyon, California State Univ./Los Angeles (United States)
Bruce W. Barnes, NASA Langley Research Ctr. (United States)
Mulugeta Petros, NASA Langley Research Ctr. (United States)
Jirong Yu, NASA Langley Research Ctr. (United States)
Farzin Amzajerdian, NASA Langley Research Ctr. (United States)
Michael J. Kavaya, NASA Langley Research Ctr. (United States)
Upendra N. Singh, NASA Langley Research Ctr. (United States)


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