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Proceedings Paper

Lasing of molecular HBr in the four-micron region pumped by a DF-laser
Author(s): Andrei P. Burtsev; I. G. Burtseva; V. I. Mashendzhinov; V. V. Sudarikov; Evgueni Alexandrovitch Klimuk
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Paper Abstract

High efficiency optical pumping of 4-μm HBr-laser was performed by the principal 2P9 line (3.836 μm) of pulsed DF-laser. Precise coincidence revealed of this laser transition with R2 line of the fundamental absorption band of the heavy isotopomer of hydrogen bromide was utilized. Lasing within 0.3-15 Torr pressure range was observed in overall (4.017-4.215) μm spectral range, at both off-axis and the collinear pumping geometry (pump fluence of 0.2 - 0.4 J/cm2, pulse FWHM duration ~300 ns). Complex behaviour of HBr-laser emission peak intensity, pulse duration and time delay upon the gas pressure was analyzed. Energy conversion efficiency at P=10 Torr was increased from ~2% to more than 5%, when collinear scheme with better mode-matching was utlized. It is believed that the efficiency may be additionally improved by optimization of HBr-laser cavity losses.

Paper Details

Date Published: 23 March 2005
PDF: 3 pages
Proc. SPIE 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (23 March 2005); doi: 10.1117/12.611096
Show Author Affiliations
Andrei P. Burtsev, St. Petersburg State Univ. (Russia)
I. G. Burtseva, Russian Scientific Ctr. (Russia)
V. I. Mashendzhinov, Russian Scientific Ctr. (Russia)
V. V. Sudarikov, Russian Scientific Ctr. (Russia)
Evgueni Alexandrovitch Klimuk, Russian Scientific Ctr. (Russia)

Published in SPIE Proceedings Vol. 5777:
XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Jarmila Kodymova, Editor(s)

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