中国激光, 2018, 45 (4): 0406003, 网络出版: 2018-04-13   

2 μm波段高双折射微结构磁流体光纤特性研究 下载: 902次

Characteristics Investigation of High Birefringent Micro-Structured Optical Fiber Filled with Magnetic Fluid at 2 μm Band
作者单位
1 北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室, 北京 100044
2 河北工业大学电子信息工程学院, 天津 300401
摘要
设计了一种新型微结构光纤, 光纤包层中具有相互垂直的两对椭圆空气孔, 即两个较大的椭圆空气孔和两个较小的填充磁流体的椭圆孔, 四个孔包围形成一个类长方形的纤芯。采用有限元法仿真分析了它在2 μm波段的双折射特性和损耗特性, 并通过优化得到最佳光纤结构参数。仿真结果表明, 该光纤结构的模式双折射可以达到10-3, 限制损耗低于10-11 dB·m-1, 同时实现了高双折射和低限制损耗的设计目标。通过改变外界磁场可以改变磁流体材料的折射率, 进而改变光纤的有效折射率, 实现对光纤中所传输的偏振光相位的连续调谐。
Abstract
A new type of micro-structured optical fiber (MOF) is designed. The fiber cladding has two pairs of elliptical air holes that are perpendicular to each other. The larger holes are filled with air and the smaller holes are filled with magnetic fluid. The four holes form a rectangular core. The finite element method is utilized to simulate and analyze the birefringence and confinement loss of the fiber at 2 μm wavelength band, and the best fiber structure is obtained by the structure parameters optimization. The simulation results show that the optical fiber model birefringence can reach to 10-3, while the loss is less than 10-11 dB·m-1, thus, double standards of high birefringence and low confinement loss are achieved simultaneously. The refractive index of the magnetic fluid material can be changed by change of the external magnetic field, and then the effective refractive index of the fiber is changed. Consequently, the transmission of polarized light in the fiber can be tuned continuously.

郭玉玉, 延凤平, 刘硕, 张鲁娜. 2 μm波段高双折射微结构磁流体光纤特性研究[J]. 中国激光, 2018, 45(4): 0406003. Guo Yuyu, Yan Fengping, Liu Shuo, Zhang Luna. Characteristics Investigation of High Birefringent Micro-Structured Optical Fiber Filled with Magnetic Fluid at 2 μm Band[J]. Chinese Journal of Lasers, 2018, 45(4): 0406003.

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