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Room temperature Dy:YLF laser operation at 4.34 micronA Dy:YLF laser operating on the 6H11/2 to 6H13/2 transition at 4.34 micron and using a laser pumping scheme is reported. This pumping scheme is necessitated by the short upper-laser-level lifetime and the small effective stimulated-emission cross section. A suitable laser for this application is the Er:YLF laser operating at 1.73 micron. A simple model that approximates Dy:YLF laser performance well is presented. Results on laser performance, including a determination of the slope efficiency and threshold as a function of the output mirror reflectivity and a correlation of the pulse length with the laser output energy, are reported. Overall laser efficiency is found to be limited primarily by the ratio of the pump wavelength to laser output wavelength and the terminated four-level laser operation. Spectroscopic results, including the measurement of the absorption spectra and the lifetimes of both the upper- and lower-laser manifolds, are given.
Document ID
19910051238
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Barnes, Norman P.
(NASA Langley Research Center Hampton, VA, United States)
Allen, Roger E.
(U.S. Navy, Naval Research Laboratory, Washington DC, United States)
Date Acquired
August 15, 2013
Publication Date
February 1, 1991
Publication Information
Publication: IEEE Journal of Quantum Electronics
Volume: 27
ISSN: 0018-9197
Subject Category
Lasers And Masers
Accession Number
91A35861
Distribution Limits
Public
Copyright
Other

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