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设计了一种包层为椭圆孔排列的六边形结构SF57软玻璃光子晶体光纤,在其纤芯区域引入了菱形排列的四个小椭圆孔.利用有限元法模拟了该光子晶体光纤的双折射和有效模场面积,获得了波长1.55μm处双折射为1.01×10~(-1),x和y偏振的有效模场面积分别为1.52μm~2、1.55μm~2的高双折射低有效模场面积光子晶体光纤.且对该光纤的结构参数进行了实验制作的容差性分析,得到了较大的制作容差对其光纤的双折射影响很小,具有较好的偏振稳定性.
A kind of SF57 soft glass photonic crystal fiber with hexagonal structure arranged in an elliptic hole was designed and four small elliptical holes with diamond arrangement were introduced in the core region of the fiber.The finite element method The birefringence at 1.55μm wavelength is 1.01 × 10 ~ (-1). The effective mode field areas of x and y polarizations are 1.52μm ~ 2 and 1.55μm ~ 2, respectively. High birefringence Effective mode field area photonic crystal fiber.And the experimental analysis of the fiber’s structural parameters was carried out in order to find out that the larger manufacturing tolerance has little influence on the birefringence of the fiber and has the better polarization stability .