Abstract

The effects of stimulated Raman gain are commonly analyzed in the frequency domain. For ultrashort (fsec) pulses, however, the spectral bandwidth of the pulse can be of the order of the Raman shift, or even larger, and this makes frequency domain analyses complicated and computationally inefficient. Alternatively, the Raman effect can be analyzed in the time domain, in which case the Raman gain is described by a time-dependent contribution to the intensity dependence of the refractive index.^[1] In this paper we develop the Raman response function for silica-core optical fibers, and then use it for studies of the effects of Raman gain on the propagation of optical solitons in fibers, for both bright and dark solitons.

© 1989 Optical Society of America