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High Efficiency End-Pumped Ho:Tm:YLF Disk AmplifierSpace based coherent lidar for global wind measurement requires an all solid state laser system with high energy, high efficiency and narrow linewidth that operates in the eye safe region. A Q-switched, diode pumped Ho:Tm:YLF 2 micrometer laser with output energy of as much as 125 mJ at 6 Hz with an optical-to-optical efficiency of 3% has been reported. Single frequency operation of the laser was achieved by injection seeding. The design of this laser is being incorporated into NASA's SPARCLE (SPAce Readiness Coherent Lidar Experiment) wind lidar mission. Laser output energy ranging from 500 mJ to 2 J is required for an operational space coherent lidar. We previously developed a high energy Ho:Tm:YLF master oscillator and side pumped power amplifier system and demonstrated a 600-mJ single frequency pulse at a repetition rate of 10 Hz. Although the output energy is high, the optical-to-optical efficiency is only about 2%. Designing a high energy, highly efficient, conductively cooled 2-micrometer laser remains a challenge. In this paper, the preliminary result of an end-pumped amplifier that has a potential to provide a factor 3 of improvement in the system efficiency is reported.
Document ID
20000013011
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Yu, Jirong
(Science and Technology Corp. Hampton, VA United States)
Singh, Upendra N.
(NASA Langley Research Center Hampton, VA United States)
Petros, Mulugeta
(Science and Technology Corp. Hampton, VA United States)
Axenson, Theresa J.
(Science and Technology Corp. Hampton, VA United States)
Barnes, Norman P.
(NASA Langley Research Center Hampton, VA United States)
Date Acquired
August 19, 2013
Publication Date
November 1, 1999
Publication Information
Publication: Tenth Biennial Coherent Laser Radar Technology and Applications Conference
Subject Category
Electronics And Electrical Engineering
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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