Pulse compression of negatively chirped pulses in silicon photonic nanowire

Abstract

Pulse compression of initial negative frequency chirp pulses in silicon photonic nanowire has been analyzed numerically. The effects of the initial negative frequency chirp and core diameter variation on pulse compression have been numerically investigated. By analyzing the interaction of SPM, positive group-velocity dispersion and the initial negative frequency chirp, we find that the compression factor increases but the quality factor and the optimum fiber length decrease with the increasing initial negative chirp when the core diameter is specified. A compression factor of 8.02 can be achieved by a pulse with initial negative frequency chirp of -20 and initial FWHM duration of 30 fs in a 4.35 μm long silicon nanowire.