Wen Jianxiang, Peng Gang-Ding, Luo Wenyun, Xiao Zhongyin, Chen Zhenyi, Wang Tingyun
Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China.
Opt Express. 2011 Nov 7;19(23):23271-8. doi: 10.1364/OE.19.023271.
The Rayleigh scattering loss in low water peak single-mode optical fibers under varying Gamma rays irradiation has been investigated. We observed that the Rayleigh scattering coefficient (CR) of the fiber is almost linearly increased with the increase of Gamma irradiation in the low-dose range (< 500 Gy). Based on the electron spin resonance (ESR) spectra analysis, we confirmed that the Rayleigh scattering mainly results from the irradiation-induced defect centers associated with electron transfer or charge density redistribution around Ge and O atoms. This work provides a new interpretation of the optical loss and reveals a new mechanism on irradiation influence on Rayleigh scattering.
研究了低水峰单模光纤在不同伽马射线辐照下的瑞利散射损耗。我们观察到，在低剂量范围（<500 Gy）内，光纤的瑞利散射系数（CR）几乎随伽马辐照剂量的增加呈线性增加。基于电子自旋共振（ESR）光谱分析，我们证实瑞利散射主要源于与锗和氧原子周围的电子转移或电荷密度重新分布相关的辐照诱导缺陷中心。这项工作为光损耗提供了新的解释，并揭示了辐照对瑞利散射影响的新机制。
