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Title: Intensity-modulated fiber Bragg grating sensor system based on radio-frequency signal measurement
Authors: Dong, Xinyong
Shao, Liyang
Fu, H. Y.
Tam, Hwa-yaw
Lu, Chao
Subjects: Feature extraction
Fiber Bragg gratings
Light modulation
Signal analysis
Strain measurement
Issue Date: 1-Mar-2008
Publisher: Optical Society of America
Source: Optics letters, 1 Mar. 2008, v. 33, no. 5, p. 482-484.
Abstract: An intensity-modulated, fiber Bragg grating (FBG) sensor system based on radio-frequency (RF) signal measurement is presented. The RF signal is generated at a photodetector by two modulated optical signals reflected from the sensing FBG and a reference FBG. Wavelength shift of the sensing FBG changes intensity of the RF signal through changing the delay between the two optical signals, with temperature effect being compensated automatically by the reference FBG. It also exhibits important features including potentially high-speed measurement, low cost, and adjustable sensitivity. In the experiment, strain measurement with a maximum sensitivity of −0.34 μV/με has been achieved.
Rights: © 2008 Optical Society of America. This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
Type: Journal/Magazine Article
DOI: 10.1364/OL.33.000482
ISSN: 0146-9592
Appears in Collections:EE Journal/Magazine Articles
EIE Journal/Magazine Articles

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