利用多极法对光子晶体光纤的色散特性进行了模拟,通过结构参数的精确设计,得到了具有三个零色散波长的单模光纤,获得了色散值极低的超平坦色散曲线.对三个零色散波长光子晶体光纤特殊的相位匹配特性进行了研究,在不同光纤结构参数下,得到了相位匹配波长随抽运波长及抽运功率的变化规律,分析了不同色散曲线对应的相位匹配波长特点.三个零色散波长光纤能实现两个反常色散区之间光孤子的高效波长变换,可以获得6个新的四波混频相位匹配波长,产生更多光子对,为高效、多波长四波混频的产生及超连续谱的研究提供了新的物理环境.

The dispersion characteristics of photonic crystal fibers are calculated by multipole method.Single mode fibers with three zero-dispersion wavelengths are obtained by the accuracy design of the fiber structure parameters.Closing to zero and flattened dispersion can be obtained in the fibers with three zero-dispersion wavelengths.The special phase-matching characteristics of the fibers with three zero-dispersion wavelengths are analyzed.The variation of phase-matching wavelength with the pump wavelength and the pump power is obtained for the different fiber structure parameters.The characteristics of phase-matching wavelength for different dispersion curves are analyzed.The presence of three zero-dispersion wavelengths can realize the high efficiency wavelength conversion of optical soliton between two anomalous dispersion regions,get six new four- wave mixing phase- matching wavelengths and produce more photon pairs.These provide a new physical condition for efficient multiple wavelength four-wave mixing and supercontinuum spectrum research.