Pulsed spontaneous Raman scattering technique for luminous environments

A gated photon counting system, cavity-dumped argon-ion laser, and a multipass retroreflecting light cell have been combined in a system to enhance spontaneous Raman scattering in luminous background situations. Signal-to-background ratio (SBR) has been improved a factor of 450 over a single-pass cw...

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Bibliographic Details
Published inApplied optics (2004) Vol. 17; no. 17; p. 2695
Main Authors Mulac, A J, Flower, W L, Hill, R A, Aeschliman, D P
Format Journal Article
LanguageEnglish
Published United States 01.09.1978
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Summary:A gated photon counting system, cavity-dumped argon-ion laser, and a multipass retroreflecting light cell have been combined in a system to enhance spontaneous Raman scattering in luminous background situations. Signal-to-background ratio (SBR) has been improved a factor of 450 over a single-pass cw system with cw power equal to the pulsed average power. The improvement attributable to the gating and cavity dumping the laser is a factor of 30. A factor of 15 improvement is due to the retroreflecting light cell. Temperature and density data obtained from N(2)Q-branch spectra of a luminous methane-air flame are presented to illustrate the utility of the system. A passband fitting technique is introduced to analyze the data.
ISSN:1559-128X
DOI:10.1364/AO.17.002695