Interrogation technology for high-speed and high-resolution fiber Bragg grating sensing system

被引：0

作者：

Wang, Yongjun ^{[1
]}

Liu, Yongchao ^{[1
]}

Zhang, Jingtao ^{[1
]}

Yang, Zhaoyi ^{[1
]}

Wang, Zhi ^{[2
]}

机构：

[1] School of Electronic Engineering, State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications

[2] Institute of Optical Information, Beijing Jiaotong University

来源：

Zhongguo Jiguang/Chinese Journal of Lasers | 2013年 / 40卷 / 02期

关键词：

Absorption spectral line for acetylene; Comb filter; Interrogation for fiber Bragg grating; Sensors; Tunable ring laser;

D O I：

10.3788/CJL201340.0205003

中图分类号：

学科分类号：

摘要：

A new interrogation scheme based on semiconductor optical amplifier (SOA) ring laser and tunable Fabry-Perot (F-P) interferometer for fiber Bragg grating (FBG) sensing system is proposed. In the interrogation scheme, a gas absorption spectral line is used as a wavelength reference, and a comb filter is designed as a standard device that can dynamically calibrate the wavelength of FBG sensors. With digital signal processing technology and wavelength detection algorithm based on the 3 dB-power point, more than 1000 temperature sensors or 240 strain sensors can be interrogated with frequency of 1000 Hz. Experiment demonstrates that the strain measuring accuracy and wavelength resolution can reach to 0.6 με and 0.5 pm, respectively, and the temperature measuring precision can reach to 0.05°C.

引用

共 7 条

[1]

Sano Y., Yoshino T., Fast optical wavelength interrogator employing arrayed waveguide grating for distributed fiber Bragg grating sensors, J. Lightwave Technol., 21, 1, pp. 132-139, (2003)

[2]

Xiao G., Mrad N., Wu F., Et al., Miniaturized optical fiber sensor interrogation system employing echelle diffractive gratings demultiplexer for potential aerospace applications, IEEE Sensors Journal, 8, 7, pp. 1202-1207, (2008)

[3]

Wang C., Yao J., Ultrafast and ultrahigh-resolution interrogation of a fiber Bragg grating sensor based on interferometric temporal spectroscopy, J. Lightwave Technol., 29, 9, pp. 2927-2933, (2011)

[4]

Wu W., Liang L., Long-term real-time monitoring system for port machinery based on fiber grating sensors, First International Conference on Intelligent Networks and Intelligent Systems (ICINIS), pp. 354-357, (2008)

[5]

Allan W., Graham Z., Zayas J., Et al., Multiplexed fiber Bragg grating interrogation system using a microelectromechanical Fabry-Perot tunable filter, IEEE Sensors Journal, 9, 8, pp. 936-943, (2009)

[6]

Chan C.C., Jin W., Ho H.L., Et al., Improvement of measurement accuracy of FBG sensor systems by use of gas absorption lines as multi-wavelength references, Electron. Lett., 37, 12, pp. 742-743, (2001)

[7]

Zhu H., Qin H., Zhang M., Et al., Peak-detection algorithm in the demodulation for the fiber Bragg grating sensor system, Chinese J. Lasers, 35, 6, pp. 893-897, (2008)

← 1 →