FBG current sensor based on CWDM demodulation

Hong Zhao; Yanling Xiong; Jian Zhang; Haijun Zhao

doi:10.1117/12.726495

5 March 2007 FBG current sensor based on CWDM demodulation

Hong Zhao, Yanling Xiong, Jian Zhang, Haijun Zhao

Proceedings Volume 6595, Fundamental Problems of Optoelectronics and Microelectronics III; 65953Y (2007) https://doi.org/10.1117/12.726495
Event: Fundamental Problems of Optoelectronics and Microelectronics III, 2006, Harbin, China

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.

Citation Download Citation

Hong Zhao, Yanling Xiong, Jian Zhang, and Haijun Zhao "FBG current sensor based on CWDM demodulation", Proc. SPIE 6595, Fundamental Problems of Optoelectronics and Microelectronics III, 65953Y (5 March 2007); https://doi.org/10.1117/12.726495

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