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Paper Abstract and Keywords
Presentation 2009-03-06 13:55
Improvement in Measurement Accuracy and Speed of Distributed Sensing in a Long-length FBG
Koji Kajiwara, Kazuo Hotate (Tokyo Univ.) OFT2008-94 OPE2008-194
Abstract (in Japanese) (See Japanese page) 
(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) 
(in English) Fiber Bragg Grating / Distributed Sensor / Synthesis of Optical Coherence Function / / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 451, OPE2008-194, pp. 39-44, March 2009.
Paper # OPE2008-194 
Date of Issue 2009-02-27 (OFT, OPE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF OFT2008-94 OPE2008-194

Conference Information
Committee OFT OPE  
Conference Date 2009-03-06 - 2009-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To OPE 
Conference Code 2009-03-OFT-OPE 
Language Japanese 
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  
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1st Author's Name Koji Kajiwara  
1st Author's Affiliation The University of Tokyo (Tokyo Univ.)
2nd Author's Name Kazuo Hotate  
2nd Author's Affiliation The University of Tokyo (Tokyo Univ.)
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Speaker Author-1 
Date Time 2009-03-06 13:55:00 
Presentation Time 25 minutes 
Registration for OPE 
Paper # OFT2008-94, OPE2008-194 
Volume (vol) vol.108 
Number (no) no.450(OFT), no.451(OPE) 
Page pp.39-44 
#Pages 6 
Date of Issue 2009-02-27 (OFT, OPE) 

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