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针对光纤通信中的色散补偿,尤其是密集波分复用系统的多信道同时补偿的需求,提出了一种用于宽带色散斜率补偿的光子准晶体光纤.该光纤结构包层空气孔为准晶体排列,并且在纤芯引入了中心缺陷.通过对光纤特性的数值分析表明,在1 460~1 625nm的光通信波段,该结构光纤的相对色散斜率为0.004 4~0.002 9nm-1,相对色散斜率与标准单模光纤近似相等,且负色散值达-2 476ps·nm-1·km-1.对标准单模光纤进行色散补偿后,在S+C+L波段色散值为(-0.5~0)ps·nm-1·km-1.该光纤可用于对当前光纤通信系统进行宽带色散补偿,实现多信道同时补偿,简化结构,并降低补偿成本.
Aiming at the demand of dispersion compensation in optical fiber communication, especially for multi-channel simultaneous compensation of dense wavelength division multiplexing system, a photonic quasi-crystal optical fiber for broadband dispersion slope compensation is proposed. And the center defects are introduced into the core.The numerical analysis of the fiber characteristics shows that the relative dispersion slope of the fiber is 0.004 4 ~ 0.002 9nm-1 in the optical communication band of 1 460 ~ 1 625 nm, the relative dispersion slope And the standard single-mode optical fiber is approximately equal, and the negative dispersion value reaches -2 476 ps · nm-1 · km-1. After the dispersion compensation of the standard single-mode optical fiber is carried out, when the dispersion value of the S + C + L band is (-0.5-0 ) ps · nm-1 · km-1. The fiber can be used to perform wideband dispersion compensation on current fiber-optic communication systems, enabling simultaneous multi-channel compensation, simplifying the fabric and reducing compensation costs.