QブランチCARS温度計測の高精度化 : 単一縦モードポンプ光の効果

概要

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The effects of the single-longitudinal-mode (single-mode) pump beam on CARS thermometry have been investigated in the temperature range of 300-800 K for pressures of 0.1-3.0 MPa. The accuracy of temperature measurement of averaged CARS measurements, in the case of a multi-longitudinal-mode pump beam, was improved from 40 K to 20 K. The accuracy of the pseudo-single -shot CARS method, in which the single-shot CARS spectrum is normalized by the averaged reference spectrum, was 40 K. The advantages of using the single-mode pump beam are as follws : (1) shorter computational time of the theoretical spectra, (2) determination of the accurate instrumental function, (3) increase of the temperature change of the CARS spectral profile, (4) improve-ment of the reproducibility of the Stokes beam spectral profilie, and (5) elimination of the shot-to-shot spectral profile variation of the pump beam.
社団法人日本機械学会の論文
1993-10-25