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中文摘要：
对纤芯附近引入两个大孔的光子晶体保偏光纤（PM-PCF）双折射特性进行分析,通过调节大孔直径和小孔直径,给出PM-PCF最优化的设计参数。同时,在包层采用选择性填充方法,使双折射进一步提高。采用有限元法（FEM）,模拟并分析了该光纤的偏振特性和基模模场分布。研究表明：采用本文方法使PM-PCF的模式双折射比普通PM-PCF提高了1个数量级,研究结果为高双折射PM-PCF的设计与研制提供了一种有效的理论分析方法。
英文摘要：
A kind of high-birefringence polarization-maintaining（PM） photonic crystal fiber（PCF） is analyzed by introducing two big air holes near the core.The optimization scheme of PM-PCFs is presented by means of adjusting the sizes of the larger holes and the smaller holes.The polarization properties and mode field distributions of this fiber are analyzed by utilizing the finite element method（FEM）.The results indicate that the mode birefringence is highly improved by the selective filling method,and it is possible to realize it in the selective filling experiment.This research provides effective theoretical method for the development and construction of high-birefringence photonic crystal fiber.
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