Catalytic enhancement of singlet oxygen production and optical gain in electric discharge oxygen-iodine laser systems

Seonkyung Lee; Wilson T. Rawlins; Adam J. Hicks; Ian M. Konen; Emily P. Plumb; Steven J. Davis

doi:10.1117/12.877240

17 February 2011 Catalytic enhancement of singlet oxygen production and optical gain in electric discharge oxygen-iodine laser systems

Seonkyung Lee, Wilson T. Rawlins, Adam J. Hicks, Ian M. Konen, Emily P. Plumb, Steven J. Davis

Author Affiliations +

Proceedings Volume 7915, High Energy/Average Power Lasers and Intense Beam Applications V; 791504 (2011) https://doi.org/10.1117/12.877240
Event: SPIE LASE, 2011, San Francisco, California, United States

Abstract

We are investigating catalytically enhanced production of singlet oxygen, O₂(a1▵g), observed by reaction of O₂/He discharge effluents over an iodine oxide film surface in a microwave discharge-flow reactor at 320 K. We have previously reported a two-fold increase in the O₂(a) yields by this process, and corresponding enhancement of I(2P1/2) excitation and small-signal gain upon injection of I₂ and NO₂. In this paper we review observed I* excitation behavior and correlations of the catalytically generated O₂(a) with atomic oxygen over a large range of discharge-flow conditions to develop a conceptual reaction mechanism for the phenomena. We describe a first-generation catalytic module for the PSI supersonic MIDJet/EOIL reactor, and tests with this module for catalyst coating deposition and enhancement of the small-signal gain observed in the supersonic flow. The results present compelling evidence for catalytic production of vibrationally excited O₂(X,v) and its participation in the I* excitation process. The observed catalytic effects could significantly benefit the development of high-power electrically driven oxygen-iodine laser systems.

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Seonkyung Lee, Wilson T. Rawlins, Adam J. Hicks, Ian M. Konen, Emily P. Plumb, and Steven J. Davis "Catalytic enhancement of singlet oxygen production and optical gain in electric discharge oxygen-iodine laser systems", Proc. SPIE 7915, High Energy/Average Power Lasers and Intense Beam Applications V, 791504 (17 February 2011); https://doi.org/10.1117/12.877240

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