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

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

J. G. Betterton, Howard J. Baker

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

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

Original language	English
Pages (from-to)	178-181
Number of pages	4
Journal	Proceedings of SPIE - the International Society for Optical Engineering
Volume	3092
DOIs	https://doi.org/10.1117/12.270210
Publication status	Published - 1997
Event	XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference - Edinburgh, United Kingdom Duration: 25 Aug 1996 → 25 Aug 1996

Keywords

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

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10.1117/12.270210

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

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. {\textcopyright}2005 Copyright SPIE - The International Society for Optical Engineering.",

keywords = "CO 2, Fast axial gas flow, Ifexcitation, Laser, Slab shaped laser medium",

author = "Betterton, {J. G.} and Baker, {Howard J.}",

year = "1997",

doi = "10.1117/12.270210",

language = "English",

volume = "3092",

pages = "178--181",

journal = "Proceedings of SPIE - the International Society for Optical Engineering",

issn = "1996-756X",

publisher = "SPIE",

note = "XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference ; Conference date: 25-08-1996 Through 25-08-1996",

}

TY - JOUR

T1 - Excitation frequency effects in a fast-axial-flow laser with a narrow gap slab RF discharge

AU - Betterton, J. G.

AU - Baker, Howard J.

PY - 1997

Y1 - 1997

N2 - 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.

AB - 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.

KW - CO 2

KW - Fast axial gas flow

KW - Ifexcitation

KW - Laser

KW - Slab shaped laser medium

U2 - 10.1117/12.270210

DO - 10.1117/12.270210

M3 - Article

SN - 1996-756X

VL - 3092

SP - 178

EP - 181

JO - Proceedings of SPIE - the International Society for Optical Engineering

JF - Proceedings of SPIE - the International Society for Optical Engineering

T2 - XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference

Y2 - 25 August 1996 through 25 August 1996

ER -

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

Abstract

Keywords

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