光纤模场直径测量的两段多项式函数拟合法  

A Method of Measuring Optical Fibers’Mode Field Diameter Based on Two-Segments Polynomial Function Fitting

作　　者：陶嘉庆 胡越 项华中[1] 涂建坤[2] 郑刚[1] TAO Jiaqing;HU Yue;XIANG Huazhong;TU Jiankun;ZHENG Gang(Shanghai Engineering Research Center of Interventional Medical Device,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Cable Research Institute,Shanghai 200093,China)

机构地区：[1]上海理工大学上海介入医疗器械工程研究中心,上海200093 [2]上海电缆研究所,上海200093

出　　处：《电子科技》2021年第11期37-41,共5页Electronic Science and Technology

基　　金：国家自然科学基金(61605114)。

摘　　要：光纤的模场直径对于评价光纤性能非常重要。远场可变孔径法是工业中测量模场直径的常用方法。目前基于远场可变孔径法的各类测量仪器使用较多的孔径,测量时间长,效率较低。针对这些问题,文中用OFM光纤测量仪测量得到光功率数据,并将两段多项式函数拟合法运用于模场直径数据的处理中。实验结果显示,该方法在20个孔径时的测量结果稳定性优于原直接拟合的结果,且在满足测量精度的前提下,能将原来的20个测量孔径光阑减少至10孔,提高了仪器的测量速度,可满足光纤生产厂家在现场质量控制中快速测试的需求。The mode field diameter of optical fiber is very important for evaluating the performance of optical fiber.The far-field variable aperture method is commonly used to measure the mode field diameter in industry.At present,more and more apertures are needed in various measuring instruments based on the far-field variable aperture method,which results in long measurement time and low efficiency.In view of this problem,this study uses the optical power data measured by the OFM optical fiber measuring instrument,and applies the two-stages polynomial function fitting method to the processing of the mode field diameter.The experimental results show that the stability of the measurement results at 20 apertures is better than that of the original direct fitting method.On the premise of meeting the measurement accuracy,the original 20 apertures can be reduced to 10 apertures.The proposed method improves the measurement speed of the instrument and can meet the needs of optical fiber manufacturers for rapid testing in on-site quality control.

关 键 词：光纤 模场直径 模场分布 光功率 远场可变孔径法 两段多项式函数拟合 孔径光阑 测量速度 

分 类 号：TN818[电子电信—信息与通信工程]