Suppression of the soliton self-frequency shift by bandwidth-limited amplification

Abstract

Experiments that produced 100-fsec pulses by a single-pass Raman amplification process did not lead to the expected self-frequency shift induced by intrapulse Raman scattering. We show that under conditions in which a Stokes pulse continues to receive frequency-dependent gain from a pump, a balance can be achieved between the two competing processes. Hence the progressive self-frequency shift of a soliton along a fiber can be suppressed.