FBG sensor interrogation using fiber optical bistability in frequency domain

Guohui Lv; Jinping Ou; Hongan Ye; Zhi Zhou; Shaohua Shang; Chao Yang; Huiying Wang

doi:10.1117/12.725924

5 March 2007 FBG sensor interrogation using fiber optical bistability in frequency domain

Guohui Lv, Jinping Ou, Hongan Ye, Zhi Zhou, Shaohua Shang, Chao Yang, Huiying Wang

Proceedings Volume 6595, Fundamental Problems of Optoelectronics and Microelectronics III; 65953G (2007) https://doi.org/10.1117/12.725924
Event: Fundamental Problems of Optoelectronics and Microelectronics III, 2006, Harbin, China

Abstract

In this paper, we propose a novel scheme of fiber Bragg grating interrogation by use of hybrid fiber optical bistable device (OBD). The OBD is realized in the fiber Bragg grating (FBG) sensing element. Light source is an electronic tuned widely swept ring fiber laser. In this experiment, FBG's are acting as optical intensity modulator and sensing elements at same time. Combined with feedback control circuit, the OBD can be used as an optic-fiber sensor working in digital type through bistable switching phenomenon. We discuss the mechanism of this bistable sensor. Scanning the bias Voltage on PZT, the bistable pulse signal can be counted by circuit that operates in the manner of a pulse-equivalent. If we use 16 bit Digital Analog Converter (DAC), the resolution will achieve 1pm level. High accuracy, high speed and high ratio of signal to noise are the advantages of this scheme.

Citation Download Citation

Guohui Lv, Jinping Ou, Hongan Ye, Zhi Zhou, Shaohua Shang, Chao Yang, and Huiying Wang "FBG sensor interrogation using fiber optical bistability in frequency domain", Proc. SPIE 6595, Fundamental Problems of Optoelectronics and Microelectronics III, 65953G (5 March 2007); https://doi.org/10.1117/12.725924

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