【摘要】 光纤的残余应力会影响其光学性能和机械特性，文中开展了基于光弹法的光纤轴向残余应力检测研究。建立光纤的光弹模型，利用琼斯矩阵分析光弹图中的光强分布特征，考虑残余应力导致的双折射相位差范围小的特点通过最小光强法进行相位提取，并仿真验证了相位提取算法的准确性，在待测相位不超过±5°条件下理论相位误差小于±0.02°;结合三次样条插值进行相位信息到应力结果的重建，获得的实验结果与商用仪器对比，除商用仪器在部分应力区域存在较大突变外，其余区域二者应力分布特征基本一致。更多还原

【Abstract】 The residual stress of optical fibers can affect their optical performance and mechanical properties.In this study, fiber axial residual stress detection was conducted based on the photoelastic method.A photoelastic model of the optical fiber was established, and the Jones matrix was used to analyze the light intensity distribution characteristics in the photoelastic pattern.Considering the small range of birefringence phase difference caused by residual stress, phase extraction was performed using the minimum light intensity method.The phase extraction algorithm accuracy was simulated and verified, showing a theoretical phase error of less than ±0.02° under the condition that the measured phase did not exceed ±5°.The phase information was then reconstructed to stress results using third-order spline interpolation.Experimental results were compared with a commercial instrument, and except for significant fluctuations in some stress regions, the stress distribution characteristics were generally consistent in other areas.更多还原