单模光纤拉伸器分布式双折射特性实验研究  

Experimental study of distributed birefringence characteristics of single-mode fiber stretcher

作　　者：苗甜甜 冯亭[1,2] 路子億 姚晓天 MIAO Tiantian;FENG Ting;LU Ziyi;YAO Xiaotian(Photonics Information Innovation Center,College of Physics Science&Technology,Hebei University,Baoding,Hebei 071002,China;Hebei Provincial Center for Optical Sensing Innovations,Baoding,Hebei 071002,China)

机构地区：[1]河北大学物理学科与技术学院光信息技术创新中心,河北保定071002 [2]河北省光学感知技术创新中心,河北保定071002

出　　处：《光电子．激光》2022年第5期458-464,共7页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61975049);河北省自然科学基金优秀青年科学基金(F2020201001);河北省“三三三人才工程”项目(A202101010);河北省创新能力提升计划项目(20542201D);河北大学高层次人才科研启动项目(521000981006)资助项目。

摘　　要：在偏振敏感光纤系统中,光纤双折射是重要的参量。基于压电陶瓷的单模光纤(single-mode fiber,SMF)拉伸器是光纤系统中引入应变、光程或相位变化等常用的器件,而少有人关注过光纤拉伸器引入的双折射特性。本文提出基于分布式偏振分析的SMF拉伸器双折射特性表征方法,结合全穆勒矩阵分析和光频域反射仪技术,可以得到SMF拉伸器缠绕光纤的分布式双折射特性。实验得到:在光纤拉伸器使用过程中,光纤双折射随驱动电压增大而增加;当光纤拉伸器缠绕光纤表面不平整时,可引入更高的基底双折射,且在施加驱动电压时,基底双折射增加更加明显;设计合适的拉伸机构和光纤缠绕方法,能有效地避免光纤拉伸器使用过程中双折射的改变,但可能会引入较强的基底双折射。本文研究结果对于在偏振敏感光纤系统中使用光纤拉伸器时系统性能的评估及优化具有指导意义。Birefringence is an important parameter in polarization sensitive fiber systems.Piezoelectric transducer based single-mode fiber(SMF)stretcher is a common device in optical fiber systems to introduce strain,optical path or phase changes,but people barely pay attention to the birefringence introduced in the fiber stretcher.In this paper,a characterization method of birefringence characteristics of SMF stretcher is proposed to obtain the birefringence distribution along the fiber wound in the stretcher,based on a distributed polarization analyzer achieved by introducing the full Muller matrix analyzing into the optical frequency domain reflectometry.From the experimental results we draw the following important conclusions:the birefringence of SMF wound in the fiber stretcher increases with the increase of driving voltage;when the surface of stretcher for SMF winding is uneven,a higher level background birefringence can be introduced,compared to a smooth surface,and the background birefringence increases more significantly when the driving voltage is applied;designing an appropriate stretching structure and fiber winding method can effectively avoid the change of birefringence during running the fiber stretcher,while a strong background birefringence may be introduced.This work will provide important guide for the evaluation and optimization of the polarization sensitive fiber systems in which the SMF stretchers are used.

关 键 词：光纤拉伸器 双折射 分布式偏振分析 

分 类 号：TN253[电子电信—物理电子学]