Intensity-modulated fiber Bragg grating sensor system based on radio-frequency signal measurement

Xinyong Dong; Li Yang Shao; H. Y. Fu; Hwa Yaw Tam; Chao Lu

doi:10.1364/OL.33.000482

Intensity-modulated fiber Bragg grating sensor system based on radio-frequency signal measurement

Xinyong Dong, Li Yang Shao, H. Y. Fu, Hwa Yaw Tam, Chao Lu

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

44 Citations (Scopus)

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.

Original language	English
Pages (from-to)	482-484
Number of pages	3
Journal	Optics Letters
Volume	33
Issue number	5
DOIs	https://doi.org/10.1364/OL.33.000482
Publication status	Published - 1 Mar 2008

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OL.33.000482

http://hdl.handle.net/10397/5016

Cite this

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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.",

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AU - Lu, Chao

PY - 2008/3/1

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AB - 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.

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JF - Optics Letters

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Intensity-modulated fiber Bragg grating sensor system based on radio-frequency signal measurement

Abstract

ASJC Scopus subject areas

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