Presentation 2009-03-06
Improvement in Measurement Accuracy and Speed of Distributed Sensing in a Long-length FBG
Koji KAJIWARA, Kazuo HOTATE,
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Abstract(in English) A new sensor system for measuring the Bragg wavelength distribution in a long-length fiber Bragg grating was proposed recently. It is based on the technique called synthesis of optical coherence function (SOCF) which is one of the techniques for reflectometry. By measuring the Bragg-wavelength distribution in the grating, it is possible to know the strain or temperature distribution. In the process of evaluating the performance of the sensing system, it is found that the reflectivity of the FBGs needs to be lower for realizing the distributed sensor with sufficient accuracy by the simulation. In this paper, the relation between the reflectivity and the measurement accuracy is verified by the experiment. Besides, a measurement speed is an important factor for the health-monitoring technique. We also demonstrate the measurement of local reflection spectrum with 1-kHz sampling rate for one position.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Fiber Bragg Grating / Distributed Sensor / Synthesis of Optical Coherence Function
Paper # OFT2008-94,OPE2008-194
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Conference Information
Committee OFT
Conference Date 2009/2/27(1days)
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Paper Information
Registration To Optical Fiber Technology (OFT)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Improvement in Measurement Accuracy and Speed of Distributed Sensing in a Long-length FBG
Sub Title (in English)
Keyword(1) Fiber Bragg Grating
Keyword(2) Distributed Sensor
Keyword(3) Synthesis of Optical Coherence Function
1st Author's Name Koji KAJIWARA
1st Author's Affiliation Department of Electrical Engineering and Information Systems, School of Engineering, The University of Tokyo()
2nd Author's Name Kazuo HOTATE
2nd Author's Affiliation Department of Electrical Engineering and Information Systems, School of Engineering, The University of Tokyo
Date 2009-03-06
Paper # OFT2008-94,OPE2008-194
Volume (vol) vol.108
Number (no) 450
Page pp.pp.-
#Pages 6
Date of Issue