Experimental effects of atomic oxygen on the development of an electric discharge oxygen iodine laser

D. L. Carroll, J. T. Verdeyen, D. M. King, J. W. Zimmerman, J. K. Laystrom, B. S. Woodard, G. F. Benavides, K. Kittell, W. C. Solomon

Research output: Contribution to journalConference articlepeer-review


As the development of the electric discharge iodine laser continues, the role of oxygen atoms downstream of the discharge region was found to be very significant. One of the largest uncertainties is the rate of quenching of I* by O atoms. We have taken a series of measurements of O 2( 1Δ) emission, I* emission, O-atom titrations, gain/absorption, and O 2( 1Δ) yield to explore the significant positive and negative roles that O atoms play in the kinetics of the system that influence the gain. An estimate of the reaction rate for I* + O is provided. This investigation of the effects of atomic oxygen led to the measurement of positive gain on the 1315 nm transition of atomic iodine where the O 2(a 1Δ) was produced in a flowing electric discharge. Excess atomic oxygen was scavenged by NO 2 to minimize the deleterious effects. The discharge production of O 2(a 1Δ) was enhanced by the addition of a small proportion of NO to lower the ionization threshold of the gas mixture. The electric discharge was followed by a continuously flowing supersonic cavity, which was employed to lower the flow temperature.

Original languageEnglish (US)
Article number38
Pages (from-to)215-220
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Issue numberPART I
StatePublished - 2005
EventXV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, GCL/HPL 2004 - Prague, Czech Republic
Duration: Aug 30 2004Sep 3 2004


  • COIL
  • Chemical oxygen-iodine laser
  • DOIL
  • ElectriCOIL
  • RF excitation of oxygen
  • Singlet-delta oxygen

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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