掺锗单模光纤布拉格光栅γ辐照损伤实验  

Experiment about γ-ray Radiation Damage of Ge-doped Silica Single-mode Fiber

作　　者：熊伟晨 温世喆 王福娟[2] 李姣洋 申玉宽 何振辉[1] 蔡志岗[2] 

机构地区：[1]中山大学空间技术中心,广州510275 [2]中山大学空光信息科学与技术专业实验室,广州510275

出　　处：《科学技术与工程》2018年第5期76-80,共5页Science Technology and Engineering

基　　金：中山大学光电材料国家重点实验室设备专项(09010-32031708)资助

摘　　要：为开发光纤布拉格光栅在空间环境温度及应变的测量的应用,有必要对其在空间辐射环境下的性能变化规律进行研究。基于色心模型,从理论上分析了电离辐射对光纤布拉格光栅传输性能的影响。采用^(60)Co-γ辐射源对两根布拉格中心波长分别为825 nm和835 nm的掺锗单模光纤布拉格光栅进行了总剂量为1.01×10~6rad的电离辐射实验。实验结果表明,随着辐照剂量的增加,光纤布拉格光栅反射谱的峰值波长发生了红移现象,光栅的折射率增加。经过总剂量1.01×10~6rad辐照后,布拉格中心波长825 nm和835 nm的峰值波长分别增加了0.070 62 nm和0.074 15 nm。实验结果与色心模型推导出的光栅有效折射率与辐射剂量的函数关系式相符合;为光纤布拉格光栅在空间环境温度及应变测量的运用提供数据基础。In order to develop the application of fiber Bragg grating in the measurement of temperature and strain in space environment,it is necessary to study the performance of fiber Bragg grating in space radiation environment. Based on the color center model,the influence of ionizing radiation on the transmission performance of fiber Bragg grating is analyzed theoretically. A^（60） Co-γ radiation source was used to study the ionization radiation experiment with a total dose of 1. 01 × 10~6 rad for two Ge-doped single-mode fiber Bragg gratings with center wavelengths of 825 nm and 835 nm. The experimental results show that with the increase of irradiation dose,the peak wavelength of fiber Bragg grating reflector redshift phenomenon,the grating refractive index increases. After the total dose of 1. 01 × 10~6 rad irradiation,the peak wavelengths of the Bragg center wavelengths of 825 nm and 835 nm were increased by 0. 070 62 nm and 0. 074 15 nm,respectively. The experimental results are in agreement with the relationship between the effective refractive index of the grating and the radiation dose. The experimental results provide a data basis for the application of fiber Bragg gratings in space ambient temperature and strain measurement.

关 键 词：光纤布拉格光栅 Γ辐射 掺锗光纤 色心 

分 类 号：TN253[电子电信—物理电子学]