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Applied Physics Letters

STIMULATED ELECTRONIC RAMAN SCATTERING

P. P. Sorokin, N. S. Shiren, J. R. Lankard, Ernest C. Hammond, T. G. Kazyaka

Published Jan 15, 1967• 70 citations
Publisher

Abstract

Stimulated electronic Raman scattering in potassium vapor is observed. The primary source was a nitrobenzene Raman-shifted ruby laser. The secondary beam frequency occurs 58 cm−1 to the high energy side of νp.
DOI
10.1063/1.1754839

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Stimulated and enhanced two-photon emissions from excited states in potassium have been observed. This emission is primed by stimulated electronic Raman radiation generated by scattering of a giant pulse ruby radiation. Four-photon parametric processes also take place. The two processes can be distinguished by tuning the laser frequency. Most of the emitted radiations are plane-polarized. A pumping model is proposed explaining the required population inversions and the polarization properties of the radiations.
An experimental investigation was made of the resonant stimulated electronic Raman scattering near the principal doublet of potassium. A study was made of the dispersion, interaction of two- and three-photon scattering, and influence of four-photon processes. Possible mechanisms of the population of the 4 2 P 1/2 and 4 2 P 3/2 potassium levels were considered. The possibility of phase-matched four-photon parametric interactions in the investigated part of the spectrum was confirmed theoretically.