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.
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.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第1期210-214,共5页
Journal of Inorganic Materials
基金
国家自然科学基金(50179029)
关键词
光敏性
载氢
掺锗光纤
photosensitivity
hydrogen loading
germanosilicate fiber
