采用多极法理论研究了光子晶体光纤的非线性和色散特性。数值模拟结果表明:保持孔直径与孔间距比值d/Λ不变,减小孔直径d;或者保持孔直径d不变,增大d/Λ,这两种方法都不仅可以显著提高光子晶体光纤的非线性,而且能够有效地将其零色散点λ0向短波长方向移动。光子晶体光纤的高非线性和灵活可调的色散特性为产生宽带、可见的超连续谱提供了前提条件。 The nonlinear and dispersion characteristics of photonic crystal fiber are studied by the theory of multipole method. The results of numerical simulation show that keeping the ratio of hole diameter to hole spacing constant d / Λ, reducing the hole diameter d, keeping the hole diameter d constant and increasing d / Λ can not only improve the photonic crystal fiber , And can effectively move its zero-dispersion point λ0 toward the short wavelength. The high nonlinearity and the flexible tunable dispersion properties of photonic crystal fibers provide the preconditions for generating broadband and visible supercontinuum.