Generation of solitons in transient stimulated Raman scattering by optical phase shifts

Abstract
Soliton initiation and formation in stimulated Raman scattering, using a π phase shift, is treated numerically. The π phase shift is produced in the Stokes seed by modulating its envelope through zero. We find that by modulating the envelope slowly compared with the coherence decay time T2, a soliton pulse is generated that is much shorter than T2. Analytical approximations for the formation rate are also presented.