Jul. 2017

Article Contents

Chinese Optics> 2017> 10(4): 484-490.

SUN Bao-chen, HOU Yue-min, LI Feng, LI Jian-zhi. Coupling characteristics between fiber grating and stimulated Brillouin signal[J]. Chinese Optics, 2017, 10(4): 484-490. doi: 10.3788/CO.20171004.0484

Citation:

SUN Bao-chen, HOU Yue-min, LI Feng, LI Jian-zhi. Coupling characteristics between fiber grating and stimulated Brillouin signal[J].Chinese Optics, 2017, 10(4): 484-490.doi:10.3788/CO.20171004.0484

SUN Bao-chen, HOU Yue-min, LI Feng, LI Jian-zhi. Coupling characteristics between fiber grating and stimulated Brillouin signal[J]. Chinese Optics, 2017, 10(4): 484-490. doi: 10.3788/CO.20171004.0484

Citation:

SUN Bao-chen, HOU Yue-min, LI Feng, LI Jian-zhi. Coupling characteristics between fiber grating and stimulated Brillouin signal[J].Chinese Optics, 2017, 10(4): 484-490.doi:10.3788/CO.20171004.0484

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Coupling characteristics between fiber grating and stimulated Brillouin signal

doi:10.3788/CO.20171004.0484

SUN Bao-chen^{1, 2,},
HOU Yue-min¹,
LI Feng¹,
LI Jian-zhi^{1, 2,,}

1.
Research Institute of Structural Health Monitoring and Control, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
2.
Technology Research Center of Engineering Vibration Isolation and Equipment in Hebei Province, Hengshui 053000, China

Funds:

National Natural Science Foundation of China51508349

Hebei Province Natural Science Foundation of ChinaE2015210094

Youth S & T Research Fund of Colleges & Universities in Hebei ProvinceQN2016080

More Information

Corresponding author:LI Jian-zhi, E-mail:lijianzhigang@163.com
Received Date:10 Mar 2017
Rev Recd Date:15 Apr 2017
Publish Date:01 Aug 2017

Abstract

Abstract

Recently, the integration technique of fiber Bragg grating (FBG) sensors and distributed optical fiber sensors has attracted extensive attention. However, it is unknown about coupling properties between FBG and Brillouin signal. In this paper, we investigate the effects of optical grating types, wavelength and reflectivity and exposure-induced refractive index of optical fiber on stimulated Brillouin signal. Meanwhile, the influence of spatial resolution on positioning of FBG is discussed. Experimental results show that the sharp reflected peak from FBG occurs in the hybrid system of FBG sensor and Brillouin optical time-domain analysis (BOTDA), while no reflected peak occurs for chirped grating and long period grating, as well as exposure-induced refractive index of optical fibers. FBG reflectivity has no connection with power spectrum of simulated Brillouin scattering. It is also shown that when the wavelength of FBG is close to 1 550 nm, the influence on stimulated Brillouin signal is the largest. A positioning error of approximate 4 cm is obtained among a sensing range of 8 m, which is independent on the spatial resolution.
- fiber Bragg grating (FBG),
- stimulated Brillouin signal,
- coupling rule,
- reflection spectrum

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References (19)

References

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