Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2013, Vol. 24 ›› Issue (4): 040206 doi: 10.13538/j.1001-8042/nst.2013.04.001

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Mechanism of E' center induced by gray radiation in silica optical fiber material

LUO Wenyun1,2 XIAO Zhongyin1 WEN Jianxiang1 YIN Jianchong1 WU Wenkai2 CHEN Zhenyi1 WANG Zihua1 WANG Tingyun1,*   

  1. 1School of Communication and Information Engineering, Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China
    2School of Environmental and Chemical Engineering, Shanghai Applied Radiation Institute, Shanghai University, Shanghai 200444, China
  • Received:2013-02-18
  • Contact: WANG Tingyun E-mail: tywang@mail.shu.edu.cn
  • Supported by:

    Supported by National Program on Key Basic Research Project (973 Program, No.2012CB723405), Natural Science Foundation of China (No.60937003, 61077068, 61275090, 61275051, and 61027015) and Shanghai Natural Science Foundation (No.12ZR1411200)

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LUO Wenyun, XIAO Zhongyin, WEN Jianxiang, YIN Jianchong, WU Wenkai, CHEN Zhenyi, WANG Zihua, WANG Tingyun. Mechanism of E' center induced by gray radiation in silica optical fiber material.Nuclear Science and Techniques, 2013, 24(4): 040206     doi: 10.13538/j.1001-8042/nst.2013.04.001

Abstract:

The characteristics of the best known defect centers E' in silica optical fiber material irradiated with g ray were investigated by ESR at room temperature. A mechanism model of production of the E' center defect was established. The production of E' center includes two processes creation and activation. ?The strained bonds (or oxygen replacement) in silica networks lead to the creation of new defects whose concentration increases linearly with the dose. The pre-existing defects produce the activation, which tends to saturation. According to this model, the relation of E' center concentration changing with irradiation dose was obtained theoretically. The results are in good agreement with the experimental results.

Key words: E' centers, γ ray radiation, Silica optical fiber material, ESR, Mechanism model