Temporal and spectral compression of pulses in fibers with a running refractive index wave

Abstract

For pulses propagating in fibers with a running refractive index wave, the pulse power could be drastically increased due to decrease of the pulse duration. We report temporal and spectral compression of the pulses and conditions for formation of soliton-like chirped pulses in nonlinear fibers with a running refractive index wave. We demonstrate 100-fold compression of the wave packets propagating in media with a running refractive index wave (down to subpicosecond durations) achieved on lengths shorter than 10 cm. In addition, the modulation instability of wave packets will be studied in such media.