Accession Number : AD0620978

Title :   GENERATION OF STOKES AND ANTI-STOKES RADIATION IN RAMAN MEDIA.

Descriptive Note : Revised ed.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Haus,H. A. ; Kelley,P. L. ; Zeiger,H. J.

Report Date : 08 JAN 1965

Pagination or Media Count : 12

Abstract : A three-dimensional analysis of stimulated Raman emission is presented for a medium through which a cylindrical laser beam passes. The buildup of the Stokes radiation from the spontaneous fluctuations in the Raman medium is considered. A generalization of the fluctuation-dissipation theorem is derived relating the current-current fluctuations at the Stokes frequency to the laser-induced (negative) conductance at this frequency. The anti-Stokes radiation is treated as arising from the interaction of the laser field and the molecular vibrations accompanying the Stokes radiation. The anti-Stokes radiation emerges in a narrow cone around the familiar phase-matching direction given by B(-) = 2k - B(+), where B(-) and B(+) are the (real parts of the) propagation constants of Stokes and anti-Stokes waves in the medium, and k is the laser propagation vector. The angular width of the anti-Stokes radiation cone is evaluated. (Author)

Descriptors :   (*LASERS, RAMAN SPECTROSCOPY), (*RAMAN SPECTROSCOPY, LASERS), (*MOLECULAR PROPERTIES, VIBRATION), ELECTROMAGNETIC FIELDS, CAVITY RESONATORS, ELECTRON TRANSITIONS, FLUORESCENCE, RUBY

Distribution Statement : APPROVED FOR PUBLIC RELEASE