Modulation Instability and Supercontinuum Generation in Photonic Crystal Fiber
光子晶体光纤中调制不稳定现象与超连续光谱的产生

The investigation of modulation instability (MI) in the Photonic crystal fiber (PCF) was reported.Using the nonlinear generalized Schroedinger equation,the MI in the anomalous as well as in the normal dispersion region were calculated and analysed.The impacts of the input pulse duration,the pulse peak power,the high-order dispersion and the high-order nonlinear effects(such as the intrapulse stimulated Raman scattering and self-steepening effects)on the MI were also expatiated.The numerical results show that the impact of the second-order dispersion on the MI is more influential than that of the third-order dispersion.It was found that the MI sidebands expand while its spectral intensity decreased as the input pulse duration was reduced.It was also found that the intrapulse stimulated Raman scattering and self-steepening effects can restrain the MI in different extents.