A Proposal of Fiber Sensing System Using Low Reflectivity FBG

Abstract:

This paper proposes multipoint optical fiber sensing system based on fiber Bragg grating (FBG) sensor array. The low reflectivity FBG sensors having the same Bragg wavelength are connected cascaded in the same fiber line as the sensing elements of optical fiber sensing system. This can increase the monitoring points and reduce manufacturing costs of FBG sensor. To verify the effectiveness, the system simulator based on equivalent circuit model by microwave technology was developed. Simulation result shows that though multi-reflections can be caused by FBG sensors with the same Bragg wavelength connected cascaded in the same line, the effect may become weak as reflectivity of FBG sensors are reduced to 0.02.

• Periodical: Key Engineering Materials (Volume 500)
• Pages: 743-747
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.500.743
• Online since: January 2012
• Authors: Yan Sheng Li, Ting Yuan Nie, Chuan Wang Song
• Keywords: Bragg Wavelength, Fiber Bragg Grating Sensor, Fiber Sensing System, Microwave Technology, Reflectivity

References

[1] Kenneth O. Hill and Gerald Meltz, Fiber Bragg Grating Technology Fundamentals and Overview, Journal of Lightwave Technology, vol. 15, Aug. 1997, pp.1263-1276, doi: 10. 1109/50. 618320.

DOI: 10.1109/50.618320

[2] Youlong Yu and Hongxia Zhao, A novel demodulation scheme for fiber Bragg grating sensor system, Photonics Technology Letters. IEEE, vol. 17, Jan. 2005, pp.166-168, doi: 10. 1109/LPT. 2004. 836907.

DOI: 10.1109/lpt.2004.836907

[3] Y.J. Chiang, Likarn Wang, Wen-Fung Liu, C.S. Hsiao, Temperature-insensitive multipoint strain-sensing system based on fiber Bragg gratings and optical power detection scheme, Sensors Journal. IEEE, vol. 6, p.465.

DOI: 10.1109/jsen.2006.870148

[4] Duan Liu, Nam Quoc Ngo, Swee Chuan Tjin, Xinyong Dong, A Dual-Wavelength Fiber Laser Sensor System for Measurement of Temperature and Strain, Photonics Technology Letters. IEEE, vol. 19, Aug. 2007, pp.1148-1150, doi: 10. 1109/LPT. 2007. 901128.

DOI: 10.1109/lpt.2007.901128

[5] Ali Al-Lawati and Hadj Bourdoucen, Fiber Bragg Grating Sensing Systems Performance Improvement and Assessment, " icmens, pp.155-159, 2004, International Conference on MEMS, NANO and Smart Systems (ICMENS, 04), (2004).

DOI: 10.1109/icmens.2004.1508937

[6] Y. Wang, W. Liu, J. Fu and D. Chen, Quasi-distributed fiber Bragg grating sensor system based on a Fourier domain mode locking fiber laser, Laser Physics, Vol. 19, No. 3, 2009, pp.450-454, DOI: 10. 1134/S1054660X09030165.

DOI: 10.1134/s1054660x09030165

[7] Katsuya Kawasaki Minato, Hyun Seung Lee, K. Ohata, Kiichi Yamashita, S. Yasui, A Study of Simulation Model for Disaster Prevention System by Using Optical Fiber FBG, Proceedings of IEICE, Sep. 2004, p.362.

[8] Agilent inc.: Advanted Degin System User's Manual.