色散平坦高非线性超低损耗双折射PCF有限元仿真

光子晶体光纤(PCF)的内部结构及材料对传输特性具有重要影响, 构建PCF的仿真模型能够快速有效地优化光纤的设计和缩短研制周期。采用全矢量有限元数值仿真方法, 研究了结构参数对PCF的模式特征、双折射、非线性、有效面积、限制损耗和色散等特性指标的调控机制, 并通过在纤芯中心位置引入轴对称分布椭圆形空气孔的方式, 实现了在1.55 μm波长处获得了高达1.39×10-2的双折射、10-7量级的限制损耗和高达37.98 W-1·km-1、44.39 W-1·km-1的HE■■、HE■■非线性系数, 以及在0.8~2.0 μm波段获得了色散值为-1.3±0.3 ps/(km·nm)的近零色散平坦。

Abstract

The internal structure and materials of photonic crystal fibers (PCF) have an important influence on the transmission characteristics. The simulation model of PCF can optimize the design of optical fibers quickly and effectively and shorten the development cycle. Using full vector finite element numerical simulation method, the control mechanism of structural parameters on PCF's mode characteristics, birefringence, nonlinearity, effective area, limiting loss and dispersion is studied. By adding and optimizing axisymmetric distributed elliptical air holes, birefringence of 1.39×10-2, limit losses of 10-7 magnitude, nonlinearity of 37.98 W-1·km-1(in HE■■), 44.39 W-1·km-1 (in HE■■) at 1.55 μm is obtained. The a dispersion value of -1.3±0.3 ps/(km·nm) is achieved within the wavelength region 0.8~2.0 μm with flat and approximately zero dispersion.

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李晓龙, 张世宏, 刘先国. 色散平坦高非线性超低损耗双折射PCF有限元仿真[J]. 光通信技术, 2020, 44(1): 58. LI Xiaolong, ZHANG Shihong, LIU Xianguo. Finite element simulation of high nonlinear ultra-low loss birefringent PCF with flat dispersion[J]. Optical Communication Technology, 2020, 44(1): 58.

色散平坦高非线性超低损耗双折射PCF有限元仿真

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