超低损耗大有效面积光纤的设计  

Design of Ultra Low Loss and Larger Effective Area Optical Fiber

作　　者：沈一春 蒋新力 范艳层 周慧 王见青 钱本华 李伟华 夏小萌 Shen Yichun;Jiang Xinli;Fan Yanceng;Zhou Hui;Wang Jianqing;Qian Benhua;Li Weihua;Xia Xiaomeng(Zhongtian Technology Advanced Materials Co.,Ltd.,Nantong 226000,China;State Grid Information ＆ Telecommunication Branch,Beijing 100761,China)

机构地区：[1]中天科技精密材料有限公司,江苏南通226000 [2]国家电网公司信息通信分公司,北京100761

出　　处：《邮电设计技术》2018年第6期33-37,共5页Designing Techniques of Posts and Telecommunications

基　　金：国家电网公司科学技术项目(SGXT0000XGJS17-00049)

摘　　要：提出了一种新颖的超低损耗G.654光纤结构设计,光纤从中心到外周依次包括纤芯、渐变层、内包层、平台层、凹陷包层、过渡层和外包层。渐变层的设计,可显著减小或消除由于芯层和内包层之间物理性能失衡而引起的应力。通过将凹陷移到远离芯层的位置,全面优化了光纤设计。在提高大曲率弯曲性能的同时,有效地减小了凹陷对截止波长的影响,从而允许设计更大有效面积的光纤。设计优化的光纤在1 625 nm处的弯曲损耗(R30-100圈)均小于0.05 d B,同时模场直径(MFD)均大于12.0μm,满足G.654.E标准。A novel design is proposed for ultra low loss G.654 optical fiber,the fiber from center to periphery includes fiber core,gradual cladding,inner cladding layer,platform layer,depression cladding,transition cladding and outer cladding. The new design of a gradual cladding can significantly reduce or eliminate the stress caused by the imbalance of physical properties between the core and the inner cladding. The optical fiber design is optimized comprehensively by moving the trench position away from the core. The optimization improves fiber bending performance under large bending Radius and minimizes the impact of trench structure on cutoff wavelength,which makes it possible to design larger effective area fiber. The bending loss（R30-100 turns）of the optimized optical fiber is less than 0.05 d B at 1 625 nm wavelength,and the MFD is greater than 12.0 μm,which satisfies the G.654.E standard.

关 键 词：超低损耗光纤 G.654 渐变层 弯曲损耗 模场直径 

分 类 号：TN929.11[电子电信—通信与信息系统]