Small signal gain and temperature profiles in supersonic COIL

Karin M. Gruenewald; Juergen Handke; Frank R. Duschek

doi:10.1117/12.414019

25 January 2001 Small signal gain and temperature profiles in supersonic COIL

Karin M. Gruenewald, Juergen Handke, Frank R. Duschek

Proceedings Volume 4184, XIII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference; (2001) https://doi.org/10.1117/12.414019
Event: XIII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, 2000, Florence, Italy

Abstract

In the cavity of the supersonic COIL of DLR, the time dependence and the spatial dependence of small signal gain (ssg) and intra-cavity temperature (ict) are investigated for a broad range ofoperating conditions. The ssg is measured by a commercial diagnostic system of PSI with a software package upgraded by the Air Force Research Lab ofKirtland, U.S.A.1,2,3,4,5 The line-shape ofthe COIL gain profile is scanned in frequency by a diode laser of narrow linewidth operating in the region of the COIL transition frequency. The ict is derived from the frill bandwidth at halfmaximum ofthe inscribed Gaussian profile. The experiments are performed for different combinations of secondary gas flow at unchanged primary baseline conditions. The results are interpreted with regard to the ssg and the temperature distribution for optimized COIL operation.

Citation Download Citation

Karin M. Gruenewald, Juergen Handke, and Frank R. Duschek "Small signal gain and temperature profiles in supersonic COIL", Proc. SPIE 4184, XIII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (25 January 2001); https://doi.org/10.1117/12.414019

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