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Beam characteristics of a large-bore copper laser with a radiatively cooled plasma [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 1994.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
10 pages : digital, PDF file
Additional Creators:
Lawrence Livermore National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
In a large-bore copper vapor laser (CVL), excessive gas heating at the axial region of the discharge lowers its efficiency by thermally populating the metastable lower laser levels. The associated lower gas density also lengthens the discharge field-diffusion time, leading to weaker axial pumping and undesired beam characteristics. The authors` laboratory has developed a novel approach to circumvent this obstacle by cooling the plasma radiatively via a series of segmented metal plates (septa) placed vertically along the length of the tube. This improved tube design significantly lowers the average gas temperature and shortens the radial delay. A 27% increase in laser power was observed with the addition of septa. The authors have characterized the beam intensity profile, spatial and temporal pulse variation, and beam polarization through extensive laboratory measurements. A detailed computational model of the laser has been used to characterize and interpret the laboratory results.
Report Numbers:
E 1.99:ucrl-jc--114954
E 1.99: conf-940142--42
conf-940142--42
ucrl-jc--114954
Subject(s):
Other Subject(s):
Note:
Published through SciTech Connect.
01/18/1994.
"ucrl-jc--114954"
" conf-940142--42"
"DE94015139"
OE/LASE `94: conference on optics, electro-optics, and laser applications in science and engineering,Los Angeles, CA (United States),22-29 Jan 1994.
Chang, J.J.; Warner, B.E.; Martinez, M.W.; Molander, W.A.; Boley, C.D.
Funding Information:
W-7405-ENG-48
View MARC record | catkey: 14112554