This paper examines the effect of index guiding in a Raman amplifier. The slowly varying Maxwell wave equation including the total Raman susceptibility for a seeded Raman amplifier is explored. Numerical calculations indicate that the real part of the Raman susceptibility cause the Raman medium to act as a lens when the Stokes seed is detuned from the Raman resonance. This focusing effect leads to a gain enhancement of up to 5% and a shift in the peak Stokes energy by up to 145 MHz to the blue side of the Raman resonance for Raman scattering in H₂ with a pump laser at 532 nm and an input seed near 683 nm.

Date Published: 10 May 1996
PDF: 11 pages
Proc. SPIE 2700, Nonlinear Frequency Generation and Conversion, (10 May 1996); doi: 10.1117/12.239679

Published in SPIE Proceedings Vol. 2700:
Nonlinear Frequency Generation and Conversion
Mool C. Gupta; William J. Kozlovsky; David C. MacPherson, Editor(s)