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

被引：5
作者：
Jin Jing [1 ]
Lin Song [1 ]
Song Ning-Fang [1 ]
机构：
[1] Beijing Univ Aeronaut & Astronaut, Sch Instrument Sci & Opt Elect Engn, Beijing 100191, Peoples R China
来源：
CHINESE PHYSICS B | 2012年 / 21卷 / 06期
基金：
中国国家自然科学基金;
关键词：
fiber Bragg grating; pre-irradiation; radiation sensitivity; GAMMA-RADIATION; SENSORS; WRITTEN;
D O I：
10.1088/1674-1056/21/6/064221
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
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 gamma-radiation exposures to a Co-60 source at a dose-rate of 0.1 Gy/sup 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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页数：7
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