Presentation 2011-08-26
An Ultra-High-Resolution Large-Dynamic-Range Fiber Optic Static Strain Sensor Using Pound-Drever-Hall Demodulation Technique
Qingwen LIU, Zuyuan HE, Tomochika TOKUNAGA, Kazuo HOTATE,
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Abstract(in English) In this paper we report the realization of a fiber optic static strain sensor with ultra-high resolution and large dynamic range for the applications of geophysical research. The sensor consists of a pair of fiber Fabry-Perot interferometers (FFPI) for strain sensing and reference, respectively. A tunable fiber laser is used to interrogate the FFPIs, and Pound-Drever-Hall technique is employed for demodulation. With a cross-correlation algorithm to calculate the resonance difference between the two FFPIs, ultra-high wavelength resolution corresponding to static strain resolution of 4.5 nano-strains was demonstrated; the dynamic range can be extended up to hundreds of micro-strains.
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Keyword(in English) Fiber optics sensor / Fabry-Perot / phase modulation
Paper # OFT2011-28
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Committee OFT
Conference Date 2011/8/18(1days)
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Language ENG
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) An Ultra-High-Resolution Large-Dynamic-Range Fiber Optic Static Strain Sensor Using Pound-Drever-Hall Demodulation Technique
Sub Title (in English)
Keyword(1) Fiber optics sensor
Keyword(2) Fabry-Perot
Keyword(3) phase modulation
1st Author's Name Qingwen LIU
1st Author's Affiliation Department of Electrical Engineering and Information Systems, The University of Tokyo()
2nd Author's Name Zuyuan HE
2nd Author's Affiliation Department of Electrical Engineering and Information Systems, The University of Tokyo
3rd Author's Name Tomochika TOKUNAGA
3rd Author's Affiliation Department of Environment Systems, The University of Tokyo
4th Author's Name Kazuo HOTATE
4th Author's Affiliation Department of Electrical Engineering and Information Systems, The University of Tokyo
Date 2011-08-26
Paper # OFT2011-28
Volume (vol) vol.111
Number (no) 182
Page pp.pp.-
#Pages 4
Date of Issue