中国物理B ›› 2012, Vol. 21 ›› Issue (6): 64221-064221.doi: 10.1088/1674-1056/21/6/064221

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Experimental investigation of pre-irradiation effect on radiation sensitivity of temperature sensing fiber Bragg gratings

金靖, 林松, 宋凝芳   

  1. School of Instrument Science and Optic-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • 收稿日期:2011-09-15 修回日期:2011-11-20 出版日期:2012-05-01 发布日期:2012-05-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61007040) and the Fundamental Research Funds for Central Universities.

Experimental investigation of pre-irradiation effect on radiation sensitivity of temperature sensing fiber Bragg gratings

Jin Jing(金靖), Lin Song(林松), and Song Ning-Fang(宋凝芳)   

  1. School of Instrument Science and Optic-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2011-09-15 Revised:2011-11-20 Online:2012-05-01 Published:2012-05-01
  • Contact: Jin Jing E-mail:jinjing@buaa.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61007040) and the Fundamental Research Funds for Central Universities.

摘要: The effect of pre-irradiation on radiation sensitivity of fiber Bragg gratings (FBGs) is verified experimentally. FBGs are fabricated in photosensitive optical fibers and single mode fibers with Ge-concentration in a range from 3 mol% to 23.37 mol% in the core. In experiments, the FBGs are subjected to twice γ-radiation exposures to a Co60 source at a dose-rate of 0.1 Gy/s up to a total dose of 50 kGy. Pre-irradiation treatment can reduce the temperature sensitivity variation of FBGs by 18.12%-35.91%, as well as Bragg wavelength shift (BWS) by 8%-27.08 %. Our research demonstrates that pre-irradiation treatment is a feasible method to improve the radiation tolerance of FBGs.

关键词: fiber Bragg grating, pre-irradiation, radiation sensitivity

Abstract: The effect of pre-irradiation on radiation sensitivity of fiber Bragg gratings (FBGs) is verified experimentally. FBGs are fabricated in photosensitive optical fibers and single mode fibers with Ge-concentration in a range from 3 mol% to 23.37 mol% in the core. In experiments, the FBGs are subjected to twice γ-radiation exposures to a Co60 source at a dose-rate of 0.1 Gy/s up to a total dose of 50 kGy. Pre-irradiation treatment can reduce the temperature sensitivity variation of FBGs by 18.12%-35.91%, as well as Bragg wavelength shift (BWS) by 8%-27.08 %. Our research demonstrates that pre-irradiation treatment is a feasible method to improve the radiation tolerance of FBGs.

Key words: fiber Bragg grating, pre-irradiation, radiation sensitivity

中图分类号:  (Optical elements, devices, and systems)

  • 42.79.-e
42.88.+h (Environmental and radiation effects on optical elements, devices, and systems) 87.55.N- (Radiation monitoring, control, and safety)