光学学报, 2017, 37 (8): 0806002, 网络出版: 2018-09-07
全固态双层芯结构色散补偿微结构光纤 下载: 688次
All-Solid Dual-Concentric-Core Microstructure Fiber for Dispersion Compensation
摘要
提出了一种全固态双层芯结构色散补偿微结构光纤。该光纤以纯石英材料为基底,通过引入一种掺锗高折射率石英柱和两种掺氟/硼的低折射率石英柱,对端面折射率分布进行调节,以形成双芯结构。在对此光纤模式演化及耦合特性理论分析的基础上,利用多极法对其模式耦合位置与强度随光纤结构参数变化的关系进行了分析,对色散特性与光纤结构参数之间的变化关系进行了研究。通过优化光纤结构参数,设计出两种光纤:光纤1在1550 nm处色散值达-8465 ps/(nm·km),与SMF-28单模光纤熔接损耗仅为1.89 dB,可对长度为其500倍的SMF-28单模光纤的色散值进行补偿;光纤2与SMF-28单模光纤的熔接损耗仅为1.41 dB,可对长度为其15.5倍的SMF-28单模光纤在C波段的色散值进行补偿,最大残余色散绝对值仅为1.38 ps/nm。与石英-空气孔微结构光纤相比,所提出的全固态色散补偿微结构光纤易制备且易与传统通信光纤熔接。
Abstract
An all-solid dual-concentric-core microstructure fiber for dispersion compensation is proposed. In order to form dual-concentric-core structure, a high refractive index silica cylinder doped with Ge and two low refractive index silica cylinders doped with fluorine or boron are introduced in pure silica to adjust refractive index distribution of cross-section. The evolution and coupling characteristics of fiber mode are theoretical analyzed. The relationships among mode coupling position, intensity and fiber structure parameters are studied by multi-pole method, and the relationship between dispersion characteristic and fiber structure parameter is studied. Two kinds of optical fiber are designed when we optimize fiber structure parameters. Fiber 1 with dispersion value of -8465 ps/(nm·km) at 1550 nm and its splicing loss with SMF-28 fiber is only 1.89 dB, and a dispersion value of SMF-28 single mode fiber with 500-fold length of fiber 1 can be compensated. The splicing loss is only 1.41 dB at 1550 nm, and a dispersion value of SMF-28 single mode fiber with 15.5-fold length of fiber 2 in the C band can be compensated. The maximum residual dispersion absolute value is only 1.38 ps/nm. Compared with silica-air microstructure fibers, the all-solid dispersion compensating microstructure fiber proposed is easier to fabricate and splice to the traditional communication fiber.
王伟, 屈玉玮, 左玉婷, 王珺琪, 孟凡超, 张春兰, 韩颖, 侯蓝田. 全固态双层芯结构色散补偿微结构光纤[J]. 光学学报, 2017, 37(8): 0806002. Wei Wang, Yuwei Qu, Yuting Zuo, Junqi Wang, Fanchao Meng, Chunlan Zhang, Ying Han, Lantian Hou. All-Solid Dual-Concentric-Core Microstructure Fiber for Dispersion Compensation[J]. Acta Optica Sinica, 2017, 37(8): 0806002.