Zero-power-gain measurements in cw HF(DF) laser by means of a fast scan technique

Journal Article · Mon Nov 01 04:00:00 EST 1976 · IEEE J. Quant. Electron.; (United States)

DOI:https://doi.org/10.1109/JQE.1976.1069070· OSTI ID:7305199

Chodzko, R A; Spencer, D J; Mirels, H; Mason, S B; Ross, D H

An improved technique for measuring zero power gain in a cw HF-DF chemical laser has been developed in which a cw HF(DF) single-line, frequency-stabilized TEM/sub 00/ mode probe laser is used. Through use of a flat rotating mirror and focusing elements, the steamwise distribution of zero-power gain was scanned at a rate of approximately 1 mm/..mu..s with a spatial resolution of approximately 1 mm. The zero-power-gain profile was observed for two arc-driven chemical-laser nozzles with both HF and DF active species. The nozzles consisted of a 36-slit array with perforated tube H/sub 2/ injectors and a 55-slit array with uniform H/sub 2/ injection. Results are presented for the variation of zero power gain with axial distance, the magnitude and location of peak gain, and the gain cutoff location for a number of transitions. Peak gain values of 15 percent/cm and 5.5 percent/cm were measured with HF and DF active species, respectively, with the 55-slit nozzle array.

• Research Organization: Aerospace Corp., El Segundo, CA
• OSTI ID: 7305199
• Journal Information: IEEE J. Quant. Electron.; (United States), Journal Name: IEEE J. Quant. Electron.; (United States) Vol. QE-12:11; ISSN IEJQA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
CHEMICAL LASERS
DEUTERIUM COMPOUNDS
FLUORIDES
FLUORINE COMPOUNDS
GAIN
HALIDES
HALOGEN COMPOUNDS
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LASERS
MEASURING METHODS