应力光纤双折射的应力微元分析方法

余盼; 季敏宁

doi:doi:10.3788/lop52.020604

激光与光电子学进展, 2015, 52 (2): 020604, 网络出版: 2015-01-19

应力光纤双折射的应力微元分析方法下载： 579次

Stress Element Analysis Method of the Birefringence in Stress-Induced Fiber

论文大纲

余盼 ^1,2,*季敏宁 ^1,2

作者单位

¹ 上海大学光纤研究所, 上海 201800

² 上海大学特种光纤与光接入网省部共建重点实验室, 上海 200072

光纤光学应力型光纤应力微元应力双折射 fiber optics stress-induced fiber stress element stress birefringence

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摘要

提出了一种计算任意形状应力区的光纤在纤芯处的应力场分布和双折射大小的应力微元积分计算方法。采用COMSOL Multiphysics 软件中的固体力学模块，研究了矩形、方形、三角形、圆等不同形状微元应力区光纤在纤芯处应力场和双折射的大小。结果表明，应力微元面积相同时，其在纤芯处引起的应力大小及其双折射与应力微元的形状、放置方向无关，只与应力微元到纤芯的距离有关。当应力微元与纤芯距离较近时，应力大小和双折射与距离近似呈平方反比关系。该结果验证了应力微元分析方法的正确性和可行性。因此对应力微元进行积分，即可得到任意形状应力区光纤在纤芯处的应力场分布与双折射。

Abstract

A stress element analysis method is proposed for calculating the stress field and birefringence at the center of fiber core with any shape of fiber stress region. With the help of solid mechanics module in COMSOL Multiphysics software, stress field distribution and birefringence at the center of optical fiber core with the different shapes such as rectangle, square, triangle, circular stress element are studied. The results show that the stress field and birefringence at stress-induced optical fiber core are independent of the shape and direction of stress elements if the area of stress elements is the same and the stress element is small enough. They are only related with the distance between the fiber core and the center of the stress element. When the stress element is close to the core, this relationship between birefringence and distance approaches inverse square. The correctness and effectiveness of stress element analysis method can be verified from the results. So with integration of the stress element, stress distribution and birefringence at fiber core with any shape of stress region can be obtained.

参考文献

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余盼, 季敏宁. 应力光纤双折射的应力微元分析方法[J]. 激光与光电子学进展, 2015, 52(2): 020604. Yu Pan, Ji Minning. Stress Element Analysis Method of the Birefringence in Stress-Induced Fiber[J]. Laser & Optoelectronics Progress, 2015, 52(2): 020604.

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