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Proceedings Paper

Hydrogen fluoride overtone laser: experimental methods of characterization
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Paper Abstract

The uncertainty in both the fluorine atom concentration and the gain length has inhibited the development of accurate and device independent models of HF overtone lasers. Furthermore, previous methods of measuring the small signal gain were cumbersome and could not easily generate spatial maps of the gain in the cavity. Experimental techniques have been developed to directly measure the concentration of fluorine atoms, the gain length and the small signal gain in a hydrogen fluoride 5 cm slit nozzle laser. A gas phase titration technique was utilized to measure the fluorine atom concentration using HCl as the titrant. The gain length was measured using a pitot probe to locate the interface of the primary flow with the high Mach number shroud flows. A tunable diode laser was utilized to perform small signal gain measurements on HF overtone (ν=2→0) transitions.

Paper Details

Date Published: 20 September 2004
PDF: 9 pages
Proc. SPIE 5448, High-Power Laser Ablation V, (20 September 2004); doi: 10.1117/12.547083
Show Author Affiliations
Charles F. Wisniewski, Air Force Research Lab. (United States)
Kevin B. Hewett, Air Force Research Lab. (United States)
Gerald C. Manke II, 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. 5448:
High-Power Laser Ablation V
Claude R. Phipps, Editor(s)

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