基于VAD法制备的低水峰G.657.B3光纤设计与性能研究  

Design and performance research of low water peak G.657.B3 optical fiber based on VAD method preparing

作　　者：吴椿烽 陈京京 钱宜刚 陈娅丽 沈一春 WU Chunfeng;CHEN Jingjing;QIAN Yigang;CHEN Yali;SHEN Yichun(Zhongtian Technology Advanced Material Co.,Ltd.,Nantong Jiangsu 226009,China)

机构地区：[1]中天科技精密材料有限公司,江苏南通226009

出　　处：《光通信技术》2021年第6期43-47,共5页Optical Communication Technology

摘　　要：为了研究G.657.B3光纤的折射率剖面结构对光学性能的影响,通过设计凹陷沟槽结构的折射率剖面和相应剖面参数(ba值、c、Δnc-和Δn+),并以适宜的气相轴向沉积(VAD)法工艺、熔融技术以及拉丝条件改善光纤的弯曲损耗,满足光纤传输所需的截止波长、模场直径和低水峰的要求。将工艺优化后所制备的光纤预制棒进行拉丝与测试,结果表明:光纤在1383 nm波长处水峰值降低至0.278 dB/km;在1550 nm、1625 nm波长处,弯曲半径为5 mm绕1圈时的宏弯典型值分别是0.081 dB、0.188 dB,完全满足ITU-T G.657.B3的指标需求。In order to study the influence of refractive index profile structure on optical properties of G.657.B3 fiber,the refractive index profile with the depressed structure and the corresponding structural parameters(such as b/a value,c,Δnc-andΔn+)are designed.Meanwhile,appropriate vapor axial deposition(VAD)method,melting process and drawing conditions are used to improve the bending loss of the optical fiber and meet the requirements of cut-off wavelength,mode field diameter and low water peak.The optical fiber preform prepared by the optimized process is drawn and tested.The results show that the attenuation of the optical fiber decreases to 0.278 dB/km at the wavelength of 1383 nm,when the bending radius is 5 mm and one circle,the typical macro-bending loss are 0.081 dB and 0.188 dB respectively at the wavelength of 1550 nm and 1625 nm,which fully meet the requirements of ITU-T G.657.B3.

关 键 词：气相轴向沉积法 光纤 折射率剖面 弯曲损耗 截止波长 羟基(OH-) 高斯分布 

分 类 号：TN929.11[电子电信—通信与信息系统]