ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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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) |
School of Instrument Science and Optic-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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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.
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Received: 15 September 2011
Revised: 20 November 2011
Accepted manuscript online:
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PACS:
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42.79.-e
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(Optical elements, devices, and systems)
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42.88.+h
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(Environmental and radiation effects on optical elements, devices, and systems)
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87.55.N-
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(Radiation monitoring, control, and safety)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61007040) and the Fundamental Research Funds for Central Universities. |
Corresponding Authors:
Jin Jing
E-mail: jinjing@buaa.edu.cn
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Cite this article:
Jin Jing(金靖), Lin Song(林松), and Song Ning-Fang(宋凝芳) Experimental investigation of pre-irradiation effect on radiation sensitivity of temperature sensing fiber Bragg gratings 2012 Chin. Phys. B 21 064221
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