光通信技术, 2020, 44 (5): 13, 网络出版: 2020-05-28   

一种高双折射低损耗椭圆双芯光子晶体光纤的特性分析

Characteristic analysis of an elliptic double core photonic crystal fiber with high birefringence and low loss
作者单位
西安邮电大学电子工程学院 西安 710121
摘要
为了获得高双折射低损耗的光子晶体光纤,设计了一种椭圆双芯,包层为三角晶格排列的光子晶体光纤。运用全矢量有限元法研究了光纤的空气.间距与双折射值、非线性特性、模场面积、限制损耗及色散的关 系。研究结果表明:在波长为 1.55 μm处,光纤基模的双折射值达 0.04343;X、Y偏振方向的非线性系数分别为 48.832 W 1kkm 1和 46.286 W 1kkm 1,同时,X方向的限制损耗低至 8.242×10 9 dB/km;在 0.85~ 1.8 μm波长范国内,色散都为正常负色散。
Abstract
In order to obtain photonic crystal fiber with high birefringence and low loss, an elliptic double core photonic crystal fiber with triangular lattice arrangement is designed. The relations between the air hole pitch of the fiber and birefringence, non-linearity characteristic, mode field area, confinement loss and dispersion is studied by using the full vector finite element method. The results show that the birefringence of the fundamental mode of the fiber reaches 0.04343 at the wavelength of 1.55 μm, and the nonlinear coefficients in X and Y polarization directions are 48.832 w -1.km-1 and 46.286 w-1.km-1 respectively. At the same time, the confinement loss in the X direction is as low as 8.242 ×10-9 dB/km. In the wavelength range of 0.85~1.8 μm, the disper-sion is normal negative dispersion.

张怡, 葛海波, 吴吴, 安文苗. 一种高双折射低损耗椭圆双芯光子晶体光纤的特性分析[J]. 光通信技术, 2020, 44(5): 13. ZHANG Yi, GE Haibo, wU Hao, AN wenzhe. Characteristic analysis of an elliptic double core photonic crystal fiber with high birefringence and low loss[J]. Optical Communication Technology, 2020, 44(5): 13.

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