Measurement of gain on the 1.315-um transition of atomic iodine as produced from the NCl(a1-delta) + I(2P3/2) energy transfer reaction

Thomas L. Henshaw; Timothy J. Madden; John M. Herbelin; Gerald C. Manke II; Brian T. Anderson; Ralph F. Tate; Gordon D. Hager

doi:10.1117/12.350650

7 June 1999 Measurement of gain on the 1.315-μm transition of atomic iodine as produced from the NCl(a¹Δ) + I(²P_3/2) energy transfer reaction

Thomas L. Henshaw, Timothy J. Madden, John M. Herbelin, Gerald C. Manke II, Brian T. Anderson, Ralph F. Tate, Gordon D. Hager

Author Affiliations +

Proceedings Volume 3612, Gas and Chemical Lasers and Intense Beam Applications II; (1999) https://doi.org/10.1117/12.350650
Event: Optoelectronics '99 - Integrated Optoelectronic Devices, 1999, San Jose, CA, United States

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

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Thomas L. Henshaw, Timothy J. Madden, John M. Herbelin, Gerald C. Manke II, Brian T. Anderson, Ralph F. Tate, and Gordon D. Hager "Measurement of gain on the 1.315-μm transition of atomic iodine as produced from the NCl(a¹Δ) + I(²P_3/2) energy transfer reaction", Proc. SPIE 3612, Gas and Chemical Lasers and Intense Beam Applications II, (7 June 1999); https://doi.org/10.1117/12.350650

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