Formation and conversion of defect centers in low water peak single mode optical fiber induced by gamma rays irradiation
Formation and conversion of defect centers in low water peak single mode optical fiber induced by gamma rays irradiation
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DOI：
10.1063/1.3273363
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发表时间：
2010-02
影响因子：
3.2
通讯作者：
J. Wen;Wenyun Luo;Zhongyin Xiao;Tingyun Wang;Zhen Y. Chen;Xianglong Zeng
中科院分区：
文献类型：
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作者：
J. Wen;Wenyun Luo;Zhongyin Xiao;Tingyun Wang;Zhen Y. Chen;Xianglong Zeng
利用电子自旋共振（ESR）技术研究了低水峰单模光纤（LWPSM）在γ射线辐照下缺陷中心的形成和转变过程。锗电子中心（GEC）和自陷空穴中心（STH）发生时，分别用1和5 kGy的累积剂量照射的纤维。随着辐照剂量的增加，GEC缺陷中心消失，并产生新的缺陷中心，如E′中心（Si和Ge）和非桥氧空穴中心（NBOHCs）。GEC和STH的产生归因于电子转移，这是完全平衡的。这是LWPSM光纤在通信窗口处辐射诱导衰减（RIA）仅为10 dB/km的主要原因。新的缺陷中心来自于GEC和STH向E′心和NBOHC的转化，而这种转化过程导致了键裂，这是导致LWPSM光纤工作窗口处RIA显著增加至180 dB/km的根本原因。福...
The formation and conversion processes of defect centers in low water peak single mode optical (LWPSM) fiber irradiated with gamma rays were investigated at room temperature using electron spin resonance. Germanium electron center (GEC) and self-trapped hole center (STH) occur when the fibers are irradiated with 1 and 5 kGy cumulative doses, respectively. With the increase in irradiation doses, the GEC defect centers disappear, and new defect centers such as E′ centers (Si and Ge) and nonbridge oxygen hole centers (NBOHCs) generate. The generation of GEC and STH is attributed to the electron transfer, which is completely balanced. This is the main reason that radiation-induced attenuation (RIA) of the LWPSM fiber is only 10 dB/km at communication window. The new defect centers come from the conversion of GEC and STH to E′ centers and NBOHC, and the conversion processes cause bond cleavage, which is the root cause that the RIA of the LWPSM fiber significantly increases up to 180 dB/km at working window. Fu...