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Frontiers of Optoelectronics

Front Optoelec Chin    2008, Vol. 1 Issue (3-4) : 223-225     DOI: 10.1007/s12200-008-0054-9
Research Article |
Temperature sensing capacity of fiber Bragg grating at liquid nitrogen temperature
Guoli CAI1(), Wei JIAN2
1. State Intellectual Property Office of the People's Republic of China; 2. Lightwave Technology Institute, Beijing Jiaotong University
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Abstract

According to the temperature sensing model of the fiber Bragg grating (FBG), a theoretical method of temperature sensing capacity of FBG is proposed. Based on the temperature sensing model of FBG, a temperature sensing experiment was completed at liquid nitrogen temperature (-196°C). The theoretical and experimental results were compared and analyzed, which show that at liquid nitrogen temperature or in a large-scope temperature sensing, the relationship between thermal variation ΔT and relative shift of reflected center wavelength ΔλB/λB of FBG is nonlinear and conic multinomial.

Keywords fiber Bragg grating (FBG)      optical fiber sensing      temperature sensing      liquid nitrogen temperature     
Corresponding Authors: CAI Guoli,Email:gl_cai23@yahoo.com.cn   
Issue Date: 05 September 2009
 Cite this article:   
Guoli CAI,Wei JIAN. Temperature sensing capacity of fiber Bragg grating at liquid nitrogen temperature[J]. Front Optoelec Chin, 2008, 1(3-4): 223-225.
 URL:  
http://journal.hep.com.cn/foe/EN/10.1007/s12200-008-0054-9
http://journal.hep.com.cn/foe/EN/Y2008/V1/I3-4/223
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Fig0  Experimental equipment of thermal sensing
λB (23°C)λB (-196°C)ΔλB0
1569.6501568.2511.399
1569.6501568.2491.401
1569.6501568.2471.403
1569.6501568.2521.398
Tab0  Measurement dada of temperature sensing(nm)
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2 WempleS H. Refractive-index behavior of amorphous semiconductors and glasses. Physical Review B , 1973, 7(8): 3767–3777
doi: 10.1103/PhysRevB.7.3767
3 TakahashiS, ShibataS. Thermal variation of attenuation for optical fibers. Journal of Non-Crystalline Solids , 1979, 30(3): 359–370
doi: 10.1016/0022-3093(79)90173-X
4 JiaZ A, QiaoX G, LiM, . Nonlinear phenomena of fiber Bragg grating temperature sensing. Acta Photonica Sinica , 2003, 32(7): 844–847 (in Chinese)
5 QiaoX G, JiaZ A, FuH W, . Theory and experiment about in-fiber Bragg grating temperature sensing. Acta Physica Sinica , 2004, 53(2): 494–497 (in Chinese)
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