A Novel Temperature-Compensated,IntensityModulated Fiber Bragg Grating Sensor System |
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| Authors: | Xin-Yong Dong Hwa-Yaw Tam |
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| Affiliation: | 1.Key Laboratory of Zhejiang Province on Modern Measurement Technology and Instrument,and College of Optical &Electronic Technology,China Jiliang University,Hangzhou,310018,China;2.Photonics Research Centre and Department of Electrical Engineering,The Hong Kong Polytechnic University,Hong Kong |
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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 one. Bragg wavelength shift of the sensing FBG changes intensity of the RF signal by changing phase difference between the two optical signals, with temperature effect being compensated automatically by the reference FBG. Strain measurement with a maximum sensitivity of -0.34 V/ has been achieved. |
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| Keywords: | Optical fiber sensing fiber Bragg gratings intensity-modulated strain |
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