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中文摘要：
利用多极法对八边形光子晶体光纤的色散补偿特性进行数值模拟,分析了结构参数变化对色散补偿特性的影响;计算了具有相同参数的六边形结构光子晶体光纤的色散系数和非线性系数;研究表明八边形光子晶体光纤比六边形结构的光子晶体光纤的大负色散特性明显提高,非色散系数低,更有利于进行色散补偿.因此,本文设计了一种新型的八边形色散补偿光纤,在λ=1.55μm时色散值为-1434.9ps.nm-1.km-1,色散斜率为-4.6338ps.nm-2.km-1,其补偿能力远大于常规光纤,能够很好的实现宽带色散补偿.
英文摘要：
The dispersion compensation property of octagonal photonic crystal fibers（PCFs） was simulated with multipole method in this paper.It was found that the dispersion,dispersion slope and Kappa parameter of PCFs can be designed precisely but changing the air hole size and the pitch in PCFs cladding.We compared photonic crystal fiber of hexagonal structure with that of octagonal structure,both of which have the same structure parameters.It was found that the octagonal structure easily abtains large negative dispersion and low non-linear coefficient.It was demonstrated that the octagonal structure has huge potential in designing diepersion compensation PCFs.So,we designed a novel PCF with octagonal structure.The PCF achieves a negative dispersion of-1434.9 ps.nm-1.km-1 and a negative dispersion slope of-4.6338 ps.nm-2.km-1 at λ = 1.55 μm,which is far better than the conventional fibre.
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