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中文摘要：
利用多极法对一种新颖结构的双层芯光子晶体光纤的色散特性进行了数值模拟，找出色散随结构变化的规律。通过合理选取其外层芯的层数，同时优化孔间距和空气孔直径，设计出可用于L波段进行宽带色散补偿的光子晶体光纤，此光纤色散值在-310 - -260ps／（km·nm）之间近似线性变化，残余有效色散系数近似为零，相关色散斜率（RDS）在0．0032nm叫的色散补偿光纤，其RDS值与标准单模光纤匹配，有效模场面积优于常规色散补偿光纤，可以对宽带传输的标准单模光纤实现良好的色散补偿。
英文摘要：
A novel design of dual-concentric-core photonic crystal fibers for dispersion compensation is simulated and analyzed by the multi-pole method, and the dispersion rules varying with the structure parameters of the fiber are found. By choosing the appropriate number of rings of the outer core, and tailoring other structural parameters, a broad-band dispersion compensation photonic crystal fibers for L-band is designed, a negative dispersion from-310 ps/ （km · nm） to -260 ps/（km · nm） is achieved, and the effective ccrmpensated dispersion （De） is approximately zero. The related dispersion slope （RDS） is compatible to that of single-mode fiber, and its effective mode area is better than that of common dispersion compensation fibers. It is proved that the novel-design cyber fibers can well realize dispersion compensation for single- mode fibers used in broadband communication.
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