Abstract

Control of white light continuum (WLC) generation by shaped laser pulses in device-grade sapphire substate was recently reported [1]. Instead of device-grade sapphire substrates, photonic crystal fiber (PCF) is used as a Kerr medium for controlling WLC generation by shaped laser pulses in our numerical simulation and experiments. In our numerical simulation, nonlinear Schrödinger equation (NLSE) without polarization effects of pulse-propagation in a single mode fiber was solved by standard 2^nd order split-step Fourier method (SSFM). The linear step in SSFM was solved by integration in frequency domain. Less straightforwardly than solving linear step, the nonlinear step was solved by treating the time derivative term as a perturbation term and using a 2^nd order Runge-Kutta method to carry out the integration [2]. Furthermore, the intermediate broadening model [3], which more fits with measured Raman response function of a silica fiber than a single-damped-oscillator model [2], was used as Raman response function in this simulation.

© 2003 Optical Society of America