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Infrared NO(v=2 1) laser pumped by energy transfer from Br(2P1/2)
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Paper Abstract

Pulsed photodissociation of iodine monobromide at 532 nm provides a high yield of spin-orbit excited atomic bromine. Near resonant electronic-to-vibrational energy transfer from Br(2P1/2) to NO(v equals 2) is rapid, k equals 2.4 X 10-12 cm3/molecule-s, and selective, with a branching ratio of NO(v equals 2) of 0.89 +/- 0.21. An NO(v equals 2 yields 1) laser operating at 5.4 microns was demonstrated at NO pressures from 0.1 - 1.4 Torr. Temporal profiles were obtained as a function of IBr and No pressures and photolysis energy to analyze laser gain, threshold, and efficiency. The threshold photolysis pump energy was 25 mJ/pulse. Lasing pulses were delayed by 150 ns from photodissociation and persisted for 100 - 200 ns. Device efficiency is limited by NO V yields V relaxation, and the maximum observed NO laser energy was 0.01 mJ for 85 mJ photolysis energy. Comparison to similar Br(2P1/2 yields 2P3/2) and Br(2P1/2)/CO2(101 - yields 100) is provided.

Paper Details

Date Published: 31 March 1995
PDF: 9 pages
Proc. SPIE 2502, Gas Flow and Chemical Lasers: Tenth International Symposium, (31 March 1995); doi: 10.1117/12.204962
Show Author Affiliations
Ray O. Johnson, Air Force Wright Lab. (United States)
Glen P. Perram, Air Force Institute of Technology (United States)
Won B. Roh, Air Force Institute of Technology (United States)
Michael R. Hawks, Air Force Phillips Lab. (United States)

Published in SPIE Proceedings Vol. 2502:
Gas Flow and Chemical Lasers: Tenth International Symposium
Willy L. Bohn; Helmut Huegel, Editor(s)

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