牵引张力和热处理对熊猫型保偏光纤双折射影响研究  

Research on Influence of Drawing Tension and Heat Treatment on the Birefringence of Panda-type Polarization-Maintaining Fiber

作　　者：徐嘉程 于飞 徐炳生 于春雷[1,3] 胡丽丽 XU Jiacheng;YU Fei;XU Bingsheng;YU Chunlei;HU Lili(Key Laboratory of Materials for High Power Laser,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Hangzhou Institute for Advanced Study,University of Chinese Academy of Sciences,Hangzhou 310024,China)

机构地区：[1]中国科学院上海光学精密机械研究所高功率激光材料重点实验室,上海201800 [2]中国科学院大学材料科学与光电技术学院,北京100049 [3]中国科学院大学杭州高等研究院,杭州310024

出　　处：《光子学报》2021年第11期80-90,共11页Acta Photonica Sinica

基　　金：国家重点研发专项(No.2020YFB1805900);国家自然科学基金(No.61875216,61935002);中国科学院率先行动“引才计划”。

摘　　要：以熊猫型保偏光纤为对象,系统研究了牵引张力和热处理对其双折射的影响。在基于有限元的多物理场建模计算中,引入牵引张力,得到熊猫型保偏光纤双折射随牵引张力增大而线性减小的数值规律。采用白光干涉法实验测量了不同热处理过程对熊猫型保偏光纤双折射的影响。高温下应力区掺硼石英玻璃发生结构弛豫,引起熊猫光纤应力区体积收缩,使双折射增大。通过计算玻璃网络空位缺陷浓度变化得到应力区掺硼石英玻璃结构弛豫引起的形变量和熊猫光纤退火后的双折射,数值仿真结果与实验测量相符。该研究为应力型保偏光纤的设计、制备和双折射调控提供了理论依据。Taking panda-type polarization-maintaining fiber as the object,the influence of drawing tension and heat treatment on its stress birefringence is systematically studied.In the multiphysics finite element modeling,we introduced the drawing tension during the fiber preparation process into the PMF photoelastic model,and we summarized the numerical law that the birefringence of the panda-type PMF decreases linearly with the increase of the drawing tension.We used white light interferometry to experimentally measure the effects of different heat treatment conditions on the birefringence of PMFs.The structural relaxation induced by boron-doped silica glass at high temperature causes the volumetric shrinkage of the Stress Applying Parts(SAP),which increases the birefringence.The deformation caused by the structural relaxation is obtained from the variation of the vacancy defect concentration of the glass network,and then the birefringence after the annealing of the fiber is calculated.The numerical simulation results are consistent with the experimental measurements.This work provides a theoretical basis for the design,preparation and birefringence control of PMF.

关 键 词：保偏光纤 双折射 牵引张力 玻璃结构弛豫 仿真计算 

分 类 号：TN814[电子电信—信息与通信工程]