Pulse trapping characteristics for nonlinear propagation of two pulses in birefringent photonic crystal fibers

摘要

A theoretical investigation of the pulse trapping in a birefringent photonic crystal fiber is presented. The strict coupled nonlinear Schroedinger equations are solved numerically using a standard split-step Fourier algorithm. Different phenomena of pulse trapping are observed depending on whether the two pulses are polarized along the same polarization axes. The signal pulse suffers cross phase modulation (XPM) from the pump pulse and it is trapped to copropagate with the pump pulse along the fiber. Much larger wavelength shift of the trapped signal pulse can be obtained by increasing the power of pump pulse. Different initial temporal separation between the pump pulse and the signal pulse leads to different effect in the pulse trapping.