偏振保持反谐振空芯光纤  

Polarization-Maintaining Anti-Resonant Hollow-Core Optical Fibers

作　　者：薛宇勃 李海粟 刘亚静[1] 王伟[1] 姜有超 任国斌[1] 裴丽[1] Xue Yubo;Li Haisu;Liu Yajing;Wang Wei;Jiang Youchao;Ren Guobin;Pei Li(Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC,Institute of Lightwave Technology,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学光波技术研究所全光网络与现代通信网教育部重点实验室,北京100044

出　　处：《激光与光电子学进展》2021年第23期328-334,共7页Laser & Optoelectronics Progress

基　　金：北京市自然科学基金(4192048);国家重点研究发展计划(2018YFB1801003);国家自然科学基金(62075007,61620106014,61827818,62005013)。

摘　　要：现代光网络需要满足高速、大带宽,大容量传输技术。基于反谐振反射光波导机制,提出一种偏振保持(PM)空芯光纤。光被正交方向上厚度不同的4个套管限制在空气芯子中来实现有效的PM传输。为了实现提高PM性能的同时降低传输损耗,研究了套管中反谐振层的数量、套管厚度、空气芯子尺寸以及正交方向上相邻两个套管之间距离的影响。数值仿真结果表明,所提出的反谐振空芯光纤在1550 nm处支持两种正交偏振模式,HE_(11x)和HE_(11y)模式的双折射为1.2×10^(-4),传输损耗分别为0.002 dB/m和0.013 dB/m。此外,在1425~1725 nm(带宽为300 nm)内,光纤的双折射不低于1.0×10^(-4),传输损耗在0.002 dB/m~0.185 dB/m范围内,色散值低于45.51 ps·nm^(-1)·km^(-1)。同时,由于采用空芯结构的设计,光纤具有较低的弯曲损耗。所提出的光纤在需要短距离,大容量和低时延传输的数据中心和金融网络系统等领域具有较好的应用前景。Modern optical networks require broadband,high-speed,large-capacity transmission techniques.Based on the anti-resonant reflecting optical waveguiding mechanism,we propose a polarization-maintaining(PM) hollowcore optical fiber.The light is confined by four tubes,which have different thicknesses along two orthogonal directions to achieve efficient PM guidance.To enhance the PM performance while achieving low propagation loss,we investigate the effects of additional anti-resonant layers in the tubes,tube thickness,air-core size and the distance between two adjacent tubes.Numerical simulations indicate that,at 1550 nm,the proposed fiber supports two orthogonally polarized modes with the birefringence of 1.2×10^(-4) and the propagation losses of HE_(11x) and HE_(11y) modes are 0.002 dB/m and 0.013 dB/m respectively.Moreover,within 1425~1725 nm(bandwidth of 300 nm),the birefringence of the proposed fiber is no less than 1.0×10^(-4),the propagation losses are within 0.002 dB/m and0.185 dB/m,and the dispersions are less than 45.51 ps·nm^(-1)·km^(-1).We also show that the proposed fiber has low bend losses thanks to the air-core guidance.The proposed fiber may have applications for data centers and financial network systems that need short-range,large-capacity and low-latency transmission.

关 键 词：双折射 反谐振反射光波导 偏振保持 空芯光纤 

分 类 号：TN252[电子电信—物理电子学]