降低空气孔参数微扰敏感性的多孔光纤宽带波片设计  

Design for Holey Fiber Broadband Wave Plate by Reducing the Perturbation Sensitivity of the Air Hole Parameters

作　　者：林建强[1,2] 石志东[1] 刘珍[1] 季敏宁[1] 

机构地区：[1]上海大学特种光纤与光接入网省部共建重点实验室,上海200072 [2]广西科技大学电气与信息工程学院,广西柳州545006

出　　处：《激光与光电子学进展》2014年第2期66-71,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(11074164;61107075);上海市重点学科和科委重点实验室项目(S30108;08DZ2231100);广西教育厅科研项目(201203YB126);广西科技大学博士基金(校科博13Z07)

摘　　要：为降低双折射多孔光纤偏振拍长的波长敏感性，制作宽带稳定的光纤偏振器件，提出一种包层空气孔呈矩形阵列分布的多孔光纤包层结构设计方案，在包层中引入具有不同双折射变化趋势的非对称性结构，采用全矢量波束传播法并考虑熔融石英的材料色散，计算分析了不同结构参数对偏振拍长稳定性的影响。研究结果表明，这种多孔光纤的包层结构降低了偏振拍长的波长敏感性，在1．26-1．60μm波长范围内，偏振拍长的相对变化率小于±4％，达到制作光纤波片的宽带稳定性能要求；同时，优化后包层结构的几何参数具有较大的误差容限，进一步降低了制作工艺的难度。To reduce the polarization beat length wavelength sensitivity in birefringence holey fiber so as to produce a stable broadband fiber-optic polarizer, a holey fiber cladding structure design with a rectangular array distribution of air holes in cladding is presented. Asymmetric structures with different birefringence trends are introduced into the cladding. The influence of different structural parameters on the polarization beat length stability is calculated and analyzed by the full vector beam propagation method, including the material dispersion of fused silica. The results show that the fiber cladding structure reduces the sensitivity of the polarization beat length to the wavelength. In the wavelength of 1.26-1.60 μm, the relative change in polarization beat length is less than ＋ 4% and the broadband stability requirements for producing optical wave plate are met. Moreover, the optimized geometrical cladding structure has a large error tolerance, further reducing the difficulty of fabrication.

关 键 词：光纤光学 多孔光纤 模式双折射 偏振拍长 波长敏感性 

分 类 号：TN253[电子电信—物理电子学]