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Proceedings Paper

Spatially resolved sub-Doppler overtone gain measurements on a small-scale supersonic HF laser
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Paper Abstract

The small signal gain of a small-scale HF overtone laser was measured using a sub-Doppler tunable diode laser system. Measurements of reactant concentration, flow velocity and gain length were also made. The spatially resolved, two-dimensional small signal gain and temperature maps that were generated show a highly inhomogeneous gain medium indicating the dominant role played by mixing of the H2 and F streams in HF laser performance. The measured gain and temperature data were analyzed with the aid of a two-dimensional computational fluid dynamics model. The results show that reactant mixing mechanisms have a large effect on the gain averaged over a vertical profile while kinetic rate mechanisms, including reaction rate constants and reactant concentration, have a greater effect on the maximum system gain.

Paper Details

Date Published: 11 May 2004
PDF: 11 pages
Proc. SPIE 5334, Gas and Chemical Lasers, and Applications III, (11 May 2004); doi: 10.1117/12.537755
Show Author Affiliations
Charles F. Wisniewski, Air Force Research Lab. (United States)
Kevin B. Hewett, Air Force Research Lab. (United States)
Gerald C. Manke, Air Force Research Lab. (United States)
C. Randall Truman, Univ. of New Mexico (United States)
Gordon D. Hager, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 5334:
Gas and Chemical Lasers, and Applications III
Steven J. Davis; Michael C. Heaven, Editor(s)

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