Temperature and Strain Characteristic Analysis of Fiber Bragg Grating Sensor
A novel method is proposed to simulate temperature and strain characteristic of fiber Bragg grating (FBG) sensor with OptiGrating software, whose temperature characteristic is investigated experimentally with FBG sensing system based on broadband source o
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Temperature and Strain Characteristic Analysis of Fiber Bragg Grating Sensor Bing Bai, Yubin Guo, Xiaohui Zhao, Jiayu Huo and Tiegang Sun
Abstract A novel method is proposed to simulate temperature and strain characteristic of fiber Bragg grating (FBG) sensor with OptiGrating software, whose temperature characteristic is investigated experimentally with FBG sensing system based on broadband source one step further, both the simulation and experiment results show that the Bragg wavelength shift is linearly proportional to uniform temperature distribution. The parameters of FBG sensing system based on fiber ring laser have been optimized for good sensing performance, high signal-to-noise ratio (SNR) and powerful multiplexing capacity indicate its effectiveness and reliability in the application of long-haul sensing system. Keywords Fiber bragg grating sensor
FBG sensing system Fiber ring laser
67.1 Introduction With the rapid development of photonic technology, optical fiber sensors play an important role in detecting outside information of nature. The fiber Bragg grating sensors have enormous potential in the application field of fiber-optic sensors as the result of immunity to electromagnetic interference, high sensitivity, small size, light weight and low cost [1–5]. The trial and error approach during fiber optical grating manufacturing process is extremely slow, expensive and unreliable, an B. Bai Y. Guo (&) X. Zhao J. Huo T. Sun College of Communication Engineering, Jilin University, 5372 Nanhu Road, ChangChun, Jilin province, China T. Sun e-mail: [email protected]
W. Lu et al. (eds.), Proceedings of the 2012 International Conference on Information Technology and Software Engineering, Lecture Notes in Electrical Engineering 210, DOI: 10.1007/978-3-642-34528-9_67, Ó Springer-Verlag Berlin Heidelberg 2013
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appropriate fiber optical grating design and modeling software will help it develop towards an optimized production. The essence of fiber grating sensor signal demodulation system is real-time monitoring of reflection spectrum from the sensing nodes, and analyses Bragg wavelength shift due to outside environment through the signal processing technology, and how to identify and measure a bunch of different wavelengths among reflected light is essential to wavelength demodulation and sensing grating addressing [6–9]. In order to realize Bragg wavelength shift detection, several optical fiber sensor signal interrogation techniques according to FBG sensor application situations have been proposed, including interrogation schemes based on a matched grating filter [10–12], an edge filter [13], a tunable F–P filter [14], an unbalanced M-Z interferometer [15], an unbalanced Michelson interferometer [16, 17], etc. In this paper, OptiGrating software is adopted to simulate Bragg wavelength shift due to uniform temperature distribution and uniform strain distribution of the FBG sensor and its temperature characteristic is investigated based on broadband source/narrowband filter conf
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