C+L波段低损耗色散补偿19芯光子晶体光纤设计  

Design of 19-core photonic crystal fiber with low loss dispersion compensation in C+L band

作　　者：王亚捷 侯尚林[1] 雷景丽[1] WANG Yajie;HOU Shanglin;LEI Jingli(School of Science,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学理学院,甘肃兰州730050

出　　处：《光学精密工程》2022年第22期2860-2868,共9页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.61665005)。

摘　　要：为解决空分复用通信系统中多芯光纤色散积累的问题,本文利用光子晶体光纤灵活的色散可调性并结合多芯光纤提出了一种C+L波段低损耗色散补偿19芯光子晶体光纤。通过有限元法结合耦合模理论对该光纤色散、芯间串扰、限制损耗及弯曲损耗等各项光学性能进行了数值模拟。结果表明,该多芯光纤在C+L波段实现大负色散的同时,能显著抑制芯间串扰及限制损耗。该光纤在C+L波段内可实现介于-9572~-13633 ps/nm/km之间的大负色散及介于2.04×10^(-5)~8.1×10^(-3)dB/km之间的超低限制损耗。同时在C+L波段该光纤芯间串扰介于-88.96~-33.33 dB/100 km之间,并且弯曲损耗值满足ITU-T建议的G.654光纤在标准光纤尺寸下对19芯光子晶体光纤的要求。因此,该光纤可在基于空分复用技术的多芯光纤通信系统中发挥有效的色散补偿作用。Dispersion accumulation is a problem experienced in space division multiplexing communication systems that use multi-core fibers.To solve this problem,use of a 19-core photonic crystal fiber(PCF)with low loss dispersion compensation in the C+L band is proposed as multi-core PCFs have flexible and tunable dispersion.The optical properties of the fiber,such as dispersion,inter-core crosstalk(XT),confinement loss,and bending loss are numerically simulated by the finite element method in combination with coupling mode theory.The results show that the multi-core fiber can significantly suppress XT and confinement loss,while achieving large negative dispersion in the C+L band.The fiber achieves a large negative dispersion of-9572 ps/nm/km to-13633 ps/nm/km and a low confinement loss of 2.04×10^(-5)dB/km to 8.1×10^(-3)dB/km in the C+L band.At the same time,the XT in the C+L band is between-88.96 dB/100 km and-33.33 dB/100 km,and the bend loss value meets the ITU-T recommendations of G.654 for 19-core PCFs with standard fiber sizes.Therefore,this fiber can play an effective role in dispersion compensation in multi-core fiber communication systems based on space division multiplexing technology.

关 键 词：空分复用 光子晶体光纤 多芯光纤 色散补偿 芯间串扰 

分 类 号：TN253[电子电信—物理电子学]