Nonlinear effect process and its optimum of supercontinuum generation in dispersion-shifted fiber

We investigate theoretically the process of supercontinuum (SC) generation which results from four-wave mixing (FWM) taking into account the effects of self-phase modulation (5PM) and cross-phase modulation (XPM) in a dispersion-shift optical fiber. The optimum pump wavelength at the highestconversion efficiency of FWM is obtained under the condition of two pumps with a weak probe on a lossless dispersion-shifted fiber and three pumps with equal channel spacing on a fiber including fiber loss. We also investigate the effects of 5PM and XPM by the spectra of co-propagating pump pulses with different pump power and fiber length. Finally, we propose a way to obtain the optimal SC resulting in a highest efficiency of FWM with small effects of 5PM and XPM.