Excitation frequency effects in a fast axial flow laser with a narrow gap slab RF discharge

J. G. Betterton; Howard J. Baker

doi:10.1117/12.270210

4 April 1997 Excitation frequency effects in a fast-axial-flow laser with a narrow gap slab RF discharge

J. G. Betterton, Howard J. Baker

Proceedings Volume 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference; (1997) https://doi.org/10.1117/12.270210
Event: XI International Symposium on Gas Flow and Chemical Lasers and High Power Laser Conference, 1996, Edinburgh, United Kingdom

Abstract

A rectangular cross-section flow tube has been used in the fast axial gas flow configuration to investigate the excitation of the carbon-dioxide laser with narrow electrode gap rf discharges. Stable discharges at a power density of 80 W/cm^-3 have been obtained, and the influence of excitation frequency in the range 27 to 125 MHz investigated. No localized thermal instability has been detected, and discharge shrinkage at high frequency is the main frequency dependent effect found. A beam power of 132 W/cm^-2 per discharge section has been obtained. Current density measurements have confirmed that conditions similar to planar waveguide, diffusion cooled carbon-dioxide lasers are attained.

Citation Download Citation

J. G. Betterton and Howard J. Baker "Excitation frequency effects in a fast-axial-flow laser with a narrow gap slab RF discharge", Proc. SPIE 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (4 April 1997); https://doi.org/10.1117/12.270210

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