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Proceedings Paper

FBG current sensor based on CWDM demodulation
Author(s): Hong Zhao; Yanling Xiong; Jian Zhang; Haijun Zhao
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Paper Abstract

An AC current sensing system by using a Giant Magnetostrictive Material (GMM) rod to modulate a Fiber Bragg Grating(FBG) is established to modify traditional current sensor. A dynamic strain model of GMM actuator is established and a demodulation method based on the linear webbing of Coarse Wavelength Division Multiplexer (CWDM) is proposed in this paper. Experiments at 50Hz AC current are carried out to testify the validity of the system, the results of which are in accordance with the theoretical simulation. The current sensitivity of the system is 144mV/A and the minimum detectable current is 70mA.

Paper Details

Date Published: 5 March 2007
PDF: 6 pages
Proc. SPIE 6595, Fundamental Problems of Optoelectronics and Microelectronics III, 65953Y (5 March 2007); doi: 10.1117/12.726495
Show Author Affiliations
Hong Zhao, Harbin Univ. of Science and Technology (China)
Yanling Xiong, Harbin Univ. of Science and Technology (China)
Jian Zhang, Harbin Normal Univ. (China)
Haijun Zhao, Harbin Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 6595:
Fundamental Problems of Optoelectronics and Microelectronics III

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