?89mm环圈状态的熊猫型单偏振光纤对光谱带宽的影响（英文）  

Effect of panda-type single polarization fiber with ?89 mm ring on its spectral bandwidth

作　　者：高亚明 韩志辉 罗瑞芳 沙洪涛 李瑞辰 GAO Yaming;HAN Zhihui;LUO Ruifang;SHA Hongtao;LI Ruichen(46 Research Institute of China Electronic Science and Technology Group Co.LTD.,Tianjin 300220,China)

机构地区：[1]中国电子科技集团有限公司第四十六研究所

出　　处：《中国惯性技术学报》2019年第2期220-226,共7页Journal of Chinese Inertial Technology

基　　金：天津市科技支撑计划重点项目(16YFZCgx00370)

摘　　要：使用单偏振光纤传输的信号瀑布线明显变窄、稳定度大幅提高,可以提高光信号的保真度和光纤陀螺的测量精度。单偏振光纤的光谱带宽位置与环圈直径有关,Φ89mm环圈是单偏振光纤的标准测量状态。通过对数值孔径分别为0.133和0.11的两组熊猫型单偏振光纤从平直到缠绕Φ89mm环圈两种状态下的对比测试分析,发现其LP01模式的两个简并基模截止波长λCY和λCX形成的光谱带宽ΔλC发生了变化,两组光纤的平均光谱带宽变窄率分别是22.22%和30.15%、平均光谱带宽下移量分别是-54nm和-76nm。对其发生变化的光学机理进一步分析,表明单偏振光纤的弯曲双折射、弯曲应力和数值孔径的综合作用是产生上述现象的原因。The waterfall line of signal,when transmitted by single polarization fiber,could be obviously narrowed and the stability will be greatly improved,which can improve the fidelity of optical signal and the measurement accuracy of FOG.The position of spectral bandwidth of single polarized optical fibers is related to the ring diameter,and Φ89mm ring is the standard measurement state of single polarized optical fibers. Comparative test and analysis are conducted on two groups of panda-type SP fibers (0.133 and 0.11 numerical apertures,respectively) under flat state and wound Φ89mm ring state,which show that the spectral bandwidth formed by two degenerate fundamental-mode cut-off wavelengths of LP01 mode,λCY and λCX,has changed. The average spectral bandwidth narrowing rates of the two groups of fibers are 22.22% and 30.15% respectively,and the average spectral bandwidth downshifts are -54 nm and -76 nm,respectively.The optical mechanism of the change is analyzed,which demonstrates that the combination of bending birefringence, bending stress and numerical aperture are the causes of the above phenomena.

关 键 词：单偏振光纤 光谱带宽 光纤环圈 截止波长 简并基模 

分 类 号：U666.1[交通运输工程—船舶及航道工程]