掺锗石英光纤光致折射率变化的实验研究

无机材料学报

掺锗石英光纤光致折射率变化的实验研究

何伟¹, 李剑芝², 梅家纯¹

1. 武汉理工大学光纤传感技术研究中心, 武汉 430070; 2. 石家庄铁道学院大型结构诊断与控制研究所, 石家庄 050043

收稿日期:2004-01-18 修回日期:2004-03-04 出版日期:2005-01-20 网络出版日期:2005-01-20

Experimental Study on Photolytic Index Changes in Germanosilicate Fiber

HE Wei¹, LI Jian-Zhi², MEI Jia-Chun¹

1. Fiber Optic Sensing Technology Center, Wuhan University of Technology, Wuhan 430070, China; 2. Struetural Health Monitoring and Control Institute,
Shijiazhuan railway Institute, Shijiazhuang 050043, China

Received:2004-01-18 Revised:2004-03-04 Published:2005-01-20 Online:2005-01-20

摘要/Abstract

摘要： 对掺锗石英光纤的紫外光敏特性进行了实验研究. 实验结果表明: 未载氢光纤经过紫外光照射后折射率变化在10^-4数量级; 而载过氢光纤的折射率变化在10^-3数量级, 比未载氢的
光纤折射率变化提高了一个数量级. 载氢前后光纤的折射率变化随曝光时间的变化规律是不同的, 这表明载氢前后光纤的光敏性微观机理是不同的. 对载氢前后光纤的光敏性机理进
行了分析与讨论, 分别解释了未载氢光纤和载氢光纤的折射率随紫外光曝光时间的变化过程.

关键词: 光敏性, 载氢, 掺锗光纤

Abstract: UV photosensitivity of a germanosilicate fiber was studied experimentally. The mechanisms of photosensitivity in non-hydrogen loaded fibers and hydrogen-loaded fibers
were discussed respectively. The explanation of the processes of the refractive index changes was presented. Experimental results show that refractive index changes of the non-hydrogen-loaded fibers are about 10^-4. However, the refractive index changes of
the hydrogen-loaded fibers are about 10^-3 which is one order more than that of the non-hydrogen-loaded fibers. The difference of the curves of the
refractive index changes between the two types of fibers shows that the mechanisms of photosensitivity in the two types of fibers are different.

Key words: photosensitivity, hydrogen loading, germanosilicate fiber

中图分类号:

TP212

何伟,李剑芝,梅家纯. 掺锗石英光纤光致折射率变化的实验研究[J]. 无机材料学报.

HE Wei, LI Jian-Zhi, MEI Jia-Chun. Experimental Study on Photolytic Index Changes in Germanosilicate Fiber[J]. Journal of Inorganic Materials.