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Proceedings Paper

Measurement of gain on the 1.315-μm transition of atomic iodine as produced from the NCl(a1Δ) + I(2P3/2) energy transfer reaction
Author(s): Thomas L. Henshaw; Timothy J. Madden; John M. Herbelin; Gerald C. Manke; Brian T. Anderson; Ralph F. Tate; Gordon D. Hager
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Paper Abstract

A direct measurement of gain on the electronic I (2P3/2) - I*(2Pi/2) transition of atomic iodine at 1.315 jam using tunable diode laser is demonstrated. The population inversion results from the efficient energy transfer between NCI (alA) metastables and I (2P3/2) atoms. Ground state iodine atoms and NCI (a1 A) metastables are produced in a transverse subsonic flow device from the stepwise reaction of Cl atoms with HI followed by the reaction of Cl with azide (N3) radicals, respectively. Under current experimental conditions, a gain of 0.020%/cm is obtained and appears to be limited by reagent number density. A kinetic model was constructed to simulate the experimental gain profile using a mechanism consisting of fully coupled finite rate chemistry and 1-D fluid dynamics. Good agreement with experimental and theoretical calculations are obtained. Keywords: Gain, population inversion, atomic iodine, NCI (a*A) metastables, azides, energy transfer

Paper Details

Date Published: 7 June 1999
PDF: 10 pages
Proc. SPIE 3612, Gas and Chemical Lasers and Intense Beam Applications II, (7 June 1999); doi: 10.1117/12.350650
Show Author Affiliations
Thomas L. Henshaw, Air Force Research Lab. (United States)
Timothy J. Madden, Air Force Research Lab. (United States)
John M. Herbelin, Air Force Research Lab. (United States)
Gerald C. Manke, Air Force Research Lab. (United States)
Brian T. Anderson, Air Force Research Lab. (United States)
Ralph F. Tate, Air Force Research Lab. (United States)
Gordon D. Hager, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 3612:
Gas and Chemical Lasers and Intense Beam Applications II
Ernest A. Dorko, Editor(s)

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