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

J. G. Betterton, Howard J. Baker

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


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. ©2005 Copyright SPIE - The International Society for Optical Engineering.

Original languageEnglish
Pages (from-to)178-181
Number of pages4
JournalProceedings of SPIE - the International Society for Optical Engineering
Publication statusPublished - 1997
EventXI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference - Edinburgh, United Kingdom
Duration: 25 Aug 199625 Aug 1996


  • CO 2
  • Fast axial gas flow
  • Ifexcitation
  • Laser
  • Slab shaped laser medium


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