Two-dimensional gain measurements in a chemical oxygen-iodine laser (COIL) device

Ralph F. Tate; B. Scott Hunt; Gordon D. Hager; Charles A. Helms; Keith A. Truesdell

doi:10.1117/12.204923

31 March 1995 Two-dimensional gain measurements in a chemical oxygen-iodine laser (COIL) device

Ralph F. Tate, B. Scott Hunt, Gordon D. Hager, Charles A. Helms, Keith A. Truesdell

Proceedings Volume 2502, Gas Flow and Chemical Lasers: Tenth International Symposium; (1995) https://doi.org/10.1117/12.204923
Event: Gas Flow and Chemical Lasers: Tenth International Symposium, 1994, Friedrichshafen, Germany

Abstract

The spatial distribution of gain has been investigated on the Research Assessment and Device Improvement Chemical Laser, a supersonic chemical oxygen-iodine laser (COIL). A frequency-stabilized, narrow linewidth diode laser system operating on the F equals 3 yields F equals 4 hyperfine levels of the (²P_1/2) to (²P_3/2) spin-orbit transition in atomic iodine was used as a small signal probe. A peak gain of 1.2%/cm was measured along the horizontal centerline of the single-slit, supersonic nozzle is about two times greater than measurements made on ReCOIL and compares favorably with measurements made on the Rotating Disk Generator (RotoCOIL) device. Gain distribution was investigated under three I₂ flow conditions. Scans across the supersonic expansion indicate a gradient in gain distribution due to higher gas temperatures along the walls and mixing phenomena.

Citation Download Citation

Ralph F. Tate, B. Scott Hunt, Gordon D. Hager, Charles A. Helms, and Keith A. Truesdell "Two-dimensional gain measurements in a chemical oxygen-iodine laser (COIL) device", Proc. SPIE 2502, Gas Flow and Chemical Lasers: Tenth International Symposium, (31 March 1995); https://doi.org/10.1117/12.204923

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