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

doi:10.1088/1674-1056/21/6/064221

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.

Keywords: fiber Bragg grating pre-irradiation radiation sensitivity

Received: 15 September 2011
Revised: 20 November 2011
Accepted manuscript online:

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

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

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

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