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设计了一种新颖结构的双层芯色散补偿光子晶体光纤。此光纤在整个C波段具有高负色散特性。通过合理选取双层芯光纤的外层芯层数,同时优化孔间距和空气孔直径,设计的光纤在C波段的色散值在-520ps/(km.nm)和-390ps/(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-1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,可以对其长度30倍以上、用于宽带传输的标准单模光纤进行良好的色散和色散斜率补偿。
A novel structure of double-core dispersion compensation photonic crystal fiber is designed. This fiber has a high negative dispersion throughout the C-band. By reasonably selecting the number of the outer core layers of the double-layer core optical fiber and optimizing the hole spacing and the air hole diameter, the designed dispersion of the optical fiber in the C-band is between -520 ps / (km.nm) and -390 ps / (km.nm) (RDS) is 0.0032nm-1, its RDS value is matched with that of standard single-mode fiber, and the effective mode-field area is better than that of conventional dispersion compensation fiber , You can make good dispersion and dispersion slope compensation for standard single-mode fibers for broadband transmission that are more than 30 times longer.