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Holmium YLF amplifier performance and the prospects for multi-Joule energies using diode-laser pumpingLaser studies were performed to examine the amplifier characteristics of holmium-doped yttrium lithium fluoride (YLF) at 300 K. An inversion ratio of 0.37 was reached resulting in a measured small-signal gain coefficient of 0.50/cm. In a flashlamp pumping experiment, an output energy of 240 mJ was achieved for 38.5 mJ of input energy resulting in a large gain of 6.2. An amplifier model was developed for diode laser pumping and adapted to consider this flashlamp-pumped case. There is good agreement between the theory and experiment. Multipass amplifier calculations using the model suggest that the Ho: Tm: YLF laser crystal can support a 12 percent electrical to optical efficiency at 300 K even in the presence of upconversion.
Document ID
19930053587
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Storm, Mark E.
(Hughes/STX Corp. Hampton, VA, United States)
Date Acquired
August 16, 2013
Publication Date
February 1, 1993
Publication Information
Publication: IEEE Journal of Quantum Electronics
Volume: 29
Issue: 2
ISSN: 0018-9197
Subject Category
Lasers And Masers
Accession Number
93A37584
Distribution Limits
Public
Copyright
Other

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