31 March 1995 Infrared NO(v=2 1) laser pumped by energy transfer from Br(2P1/2)
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Proceedings Volume 2502, Gas Flow and Chemical Lasers: Tenth International Symposium; (1995) https://doi.org/10.1117/12.204962
Event: Gas Flow and Chemical Lasers: Tenth International Symposium, 1994, Friedrichshafen, Germany
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.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ray O. Johnson, Ray O. Johnson, Glen P. Perram, Glen P. Perram, Won B. Roh, Won B. Roh, Michael R. Hawks, Michael R. Hawks, } "Infrared NO(v=2 1) laser pumped by energy transfer from Br(2P1/2)", Proc. SPIE 2502, Gas Flow and Chemical Lasers: Tenth International Symposium, (31 March 1995); doi: 10.1117/12.204962; https://doi.org/10.1117/12.204962
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