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Measurement of Raman Scattering Cross Sections for Use in Calculating Stimulated Raman Scattering Effects

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Abstract

The magnitude of stimulated Raman scattering (SRS) of the Raman laser effect depends upon the peak values of ordinary Raman scattering cross sections just as ordinary laser gain depends upon the peak value of an absorption cross section. We give here the results of the measurements of peak Raman scattering cross section for three Raman lines in nitrobenzene, benzene, and toluene for which SRS has been studied and for two other lines in benzene and toluene from which no observable SRS could be produced. The intensity of SRS calculated from these cross sections agrees with SRS measurements for these substances. A ruby laser was used as the light source. A 2-m grating spectrograph was used as the dispersing element for photometric detection. The scattering was observed at 90° from the incident laser beam and was measured for different polarizations of the incident and scattered light. The peak cross sections were measured by scanning the wavelength in steps.

© 1964 Optical Society of America

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