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Numerical study of low-current steady arcsThe development of a high-efficiency CW YLF laser doped with Er,Tm,Ho: and featuring a strongly focusing resonator that collects a high density of pump power on the active crystal is described. The emission is investigated at 2.06 microns and a tuning range both at liquid-nitrogen (77 K) and at dry-ice (210 K) temperature. The noise characteristics and the long-term power stability of the laser is studied with an eye to employing this source for high-resolution spectroscopy in the 2-micron wavelength region. The detection of several absorption lines of NH3 at low pressure is described. The output power of the laser as a function of the power impinging on the crystal for different transmission of the output mirror is illustrated. The best result obtained is 1.46 W output for 3.2 W of argon pump. The minimum threshold achieved is 3.5 mW with a 1-percent transmission mirror. It is concluded that it is possible to develop a highly efficient Ho:YLF laser featuring low noise and sufficient tunability for high-resolution spectroscopy in the 2-micron region.
Document ID
19920067640
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kim, S. C.
(Sverdrup Technology, Inc., Brook Park; NASA, Lewis Research Center Cleveland, OH, United States)
Nagamatsu, H. T.
(Rensselaer Polytechnic Institute, Troy, NY, United States)
Date Acquired
August 15, 2013
Publication Date
October 1, 1992
Publication Information
Publication: Journal of Propulsion and Power
Volume: 8
Issue: 5, Se
ISSN: 0748-4658
Subject Category
Spacecraft Propulsion And Power
Accession Number
92A50264
Distribution Limits
Public
Copyright
Other

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