氢向石英光纤密封碳涂层的扩散模型  

Diffusion Model for Hydrogen into Hermetic Carbon-Coated Optical Fiber

作　　者：竺逸年[1] 

机构地区：[1]上海电缆研究所,200093

出　　处：《光通信研究》1997年第3期40-43,共4页Study on Optical Communications

摘　　要：光纤在拉丝过程中,用沉积密封碳层的方法保护光纤,可以避免 H_2和 H_2O 引起的光纤损耗增加和强度衰退。在升温和氢压条件下,把碳密封涂层光纤暴露到 H_2气中,光纤的损耗特性与 H_2或与 H_2和 SiO_2中的缺陷反应形成的 OH 基团有关。在100～150℃范围内,用圆柱状的经典扩散理论以及 H_2在碳中的溶解度和扩散系数提出了 H_2的扩散模型。It is experimentally proved that the technique of depositing hermetic carbon coatings on surface of optical fiber during drawing process can avoid optical fiber attenu- ation and strength degradation caused by hydrogen and water.Under conditions of rising temperature and hydrogen pressure,when the carbon-coated optical fiber is exposed to hydrogen atmosphere,the optical fiber attenuation characteristics are related to hydro- gen,or th OH formed by the reaction between defects in silica and hydrogen.At the range of 100～150℃,hydrogen diffusion model is,in this paper,described by using the solubility and diffusion coefficient of hydrogen in carbon as well as cylindrical classic dif- fusion theory.

关 键 词：氢扩散 密封碳涂层 可靠性 光纤传输线 

分 类 号：TN818.05[电子电信—信息与通信工程]