Research of a high-efficiency practical distributed fiber Bragg grating temperature sensor system

Yanjun Zhang; Bo Wei; Junbo Lou; Weihong Bi

doi:10.1117/12.866671

22 October 2010 Research of a high-efficiency practical distributed fiber Bragg grating temperature sensor system

Yanjun Zhang, Bo Wei, Junbo Lou, Weihong Bi

Proceedings Volume 7658, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology; 76584C (2010) https://doi.org/10.1117/12.866671
Event: 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies, 2010, Dalian, China

Abstract

A novel practical distribute Fiber Bragg Grating sensor system is presented in this paper. When the bandwidth of the broadband light source is 300 nm, the whole system can monitor more than 1000 meters and it is divided into 100 sections. Each section has 4 gratings with identical center wavelength, and these identical gratings monitor a small zone. The center wavelength of grating will shift due to temperature changes. By detecting the reflected light, the change of temperature and the location can be obtained. The system will alarm if this temperature is over setting value. A high-precision optoelectronic detector is used to detect the optical power, and the resolution is 1 nw. Based on the theory analysis, temperature experiments of different wavelength have been done. Based on the ARM Processor Cores, we designed an optimized algorithm which encoded all gratings and coordinated Fabry-Perot (F-P) tunable filter and optoelectronic detection system synchronously. The accuracy of the algorithm is up to 10 μs. The results show that grating center wavelength varies with temperature and linearity is over 99.6 %. The system not only can realized the temperature measurements but also expand the monitor range. It has been seen in experiments that the characteristics of the measured precisions of good reliability and high efficiency, application in distributed multimetering.

Citation Download Citation

Yanjun Zhang, Bo Wei, Junbo Lou, and Weihong Bi "Research of a high-efficiency practical distributed fiber Bragg grating temperature sensor system", Proc. SPIE 7658, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Detector, Imager, Display, and Energy Conversion Technology, 76584C (22 October 2010); https://doi.org/10.1117/12.866671

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