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Pulsed laser spectral measurement using a Fabry-Perot interferometer: Limits to resolutionWe are developing a Doppler lidar system using the edge technique to measure atmospheric wind profiles. The edge technique requires a laser with a narrow spectral bandwidth and a high resolution optical filter. The lidar system will use a Nd:YAG laser operating at 1.064 microns and a high resolution Fabry-Perot interferometer for the edge filter. The Doppler shift measurement is made by locating the laser on the edge of the filter's spectral response function. Due to the steep slope on the edge, large changes in the filter transmission will be observed for small changes in frequency. The Doppler shift can be determined from a measurement of this change in filter transmission if the filter spectral response function in the region of the measurement is well known. Recently developed injection seeded solid state lasers have made near transform limited laser output readily available for lidar work. Injection-seeded Nd:YAG laser exhibit single mode output with smooth Gaussian temporal pulse shapes. Results of an experiment we conducted to evaluate the effects of a short Gaussian temporal input pulse on the spectral response of a high resolution Fabry-Perot interferometer are presented.
Document ID
19920021811
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Notari, Anthony
(Science and Engineering Services, Inc., Burtonsville MD., United States)
Gentry, Bruce M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1992
Publication Information
Publication: NASA. Langley Research Center, 16th International Laser Radar Conference, Part 2
Subject Category
Instrumentation And Photography
Accession Number
92N31055
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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