Gas Concentration Measurement by Coherent Raman Anti-Stokes Scattering
A novel technique for gas concentration measurements is described. This technique makes use of coherent Raman anti-Stokes scattering, which can be made much stronger than ordinary Raman scattering under conditions that are practical for gas probing applications. The intensity is sufficient to allow an image of the spatial distribution of a minor constituent (H2 at about 100 to 1000 ppm) to be recorded on photographic film. In this presentation, we describe the basic phenomena, potential measurement capabilities, and the results of feasibility experiments.
KeywordsStimulate Raman Scattering Ruby Laser Stokes Wave Spontaneous Raman Scattering Stokes Beam
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