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11 October 2010 Fiber Bragg grating sensor based on an erbium-doped fiber ring laser
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Fiber grating (FBG) sensor using the wave-length coding has the ability of network handling, Thus arouses people's widespread interest. The address inquiry and the signal demodulation are two key technologies which is to be solved. Not only can the active address inquiry way increase the signal-to-noise ratio, It can have the ability to inquiry more gratings .It is the current research hot spot. In this paper, A fiber laser based wavelength division multiplexed sensor system with three fiber Bragg grating sensor array as reflector of a ring-cavity fiber laser has been used. A tunable F-P filter was used to interrogate the sensors, Wavelength-shift signal induced by the measured temperature was demodulated by an unbalanced Mach-Zehnder interferometer. The sensitivity of the system was demonstrated to be 0.0082nm/oC,which was close to the theoretical value.
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Huawei Pang and Huimin Cui "Fiber Bragg grating sensor based on an erbium-doped fiber ring laser", Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 76562P (11 October 2010);

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