设计了一种宽带色散补偿光子晶体光纤,此光子晶体光纤在整个C波段具有较大的负色散值,且其色散斜率值均为负值。通过合理选取光子晶体光纤的层数和孔间距,同时优化各层的空气孔直径大小,分别设计了在1 550nm附近的色散值为-425、-440和-400ps.km-1.nm-1;且色散斜率分别为-1.49、-4.31和-8.59ps.km-1.nm-2的宽带色散补偿光子晶体光纤。可以分别实现与G.652和G.655光纤的卡帕值和相对色散斜率相匹配,具有较好的宽带色散补偿能力。 A broadband chromatic dispersion compensated photonic crystal fiber is designed. The photonic crystal fiber has a large negative dispersion value in the entire C band, and its dispersion slope value is negative. By reasonably selecting the number of photonic crystal fiber layers and the pitch of holes, and optimizing the air hole diameter of each layer, the dispersion values ​​around 1 550 nm were designed to be -425, -440 and -400 ps.km -1.nm -1 ; And wide dispersion compensation photonic crystal fiber with dispersion slope of -1.49, -4.31 and -8.59 ps.km-1.nm-2, respectively. Can be achieved with the G.652 and G.655 fiber Kappa value and the relative dispersion slope to match, with better broadband dispersion compensation capability.