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Proceedings Paper

Two-dimensional gain measurements in a chemical oxygen-iodine laser (COIL) device
Author(s): Ralph F. Tate; B. Scott Hunt; Gordon D. Hager; Charles A. Helms; Keith A. Truesdell
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Paper 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 (2P1/2) to (2P3/2) 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.

Paper Details

Date Published: 31 March 1995
PDF: 9 pages
Proc. SPIE 2502, Gas Flow and Chemical Lasers: Tenth International Symposium, (31 March 1995); doi: 10.1117/12.204923
Show Author Affiliations
Ralph F. Tate, Air Force Phillips Lab. (United States)
B. Scott Hunt, Air Force Phillips Lab. (United States)
Gordon D. Hager, Air Force Phillips Lab. (United States)
Charles A. Helms, Air Force Phillips Lab. (United States)
Keith A. Truesdell, Air Force Phillips Lab. (United States)

Published in SPIE Proceedings Vol. 2502:
Gas Flow and Chemical Lasers: Tenth International Symposium
Willy L. Bohn; Helmut Huegel, Editor(s)

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