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Paper Abstract and Keywords
Presentation 2013-01-24 15:20
Measurement range enlargement in fiber-optic distributed strain and temperature sensing by coherent OTDR
Akio Togo, Tomoaki Sudo, Hisashi Izumita, Yahei Koyamada (Ibaraki Univ.), Li Che-Hsien, Kinzo Kishida (Neubrex) OFT2012-57
Abstract (in Japanese) (See Japanese page) 
(in English) We extended measurand range of a coherent OTDR by introducing a fully tunable DFB laser whose optical frequency can be precisely controlled for measuring distributed strain and temperature with a very high resolution. We achieved distributed measurements of temperature that includes spatial variations of 10℃ with steep gradients over a 10-km long fiber with a resolution of 0.07℃ and a spatial resolution of 20 cm.
Keyword (in Japanese) (See Japanese page) 
(in English) Fiber sensor / Distributed temperature measurement / Distributed strain measurement / Rayleigh scattering / Coherent OTDR / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 403, OFT2012-57, pp. 25-30, Jan. 2013.
Paper # OFT2012-57 
Date of Issue 2013-01-17 (OFT) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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)
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Conference Information
Committee OFT  
Conference Date 2013-01-24 - 2013-01-25 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To OFT 
Conference Code 2013-01-OFT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Measurement range enlargement in fiber-optic distributed strain and temperature sensing by coherent OTDR 
Sub Title (in English)  
Keyword(1) Fiber sensor  
Keyword(2) Distributed temperature measurement  
Keyword(3) Distributed strain measurement  
Keyword(4) Rayleigh scattering  
Keyword(5) Coherent OTDR  
1st Author's Name Akio Togo  
1st Author's Affiliation Ibaraki University (Ibaraki Univ.)
2nd Author's Name Tomoaki Sudo  
2nd Author's Affiliation Ibaraki University (Ibaraki Univ.)
3rd Author's Name Hisashi Izumita  
3rd Author's Affiliation Ibaraki University (Ibaraki Univ.)
4th Author's Name Yahei Koyamada  
4th Author's Affiliation Ibaraki University (Ibaraki Univ.)
5th Author's Name Li Che-Hsien  
5th Author's Affiliation Neubrex (Neubrex)
6th Author's Name Kinzo Kishida  
6th Author's Affiliation Neubrex (Neubrex)
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Speaker Author-1 
Date Time 2013-01-24 15:20:00 
Presentation Time 25 minutes 
Registration for OFT 
Paper # OFT2012-57 
Volume (vol) vol.112 
Number (no) no.403 
Page pp.25-30 
Date of Issue 2013-01-17 (OFT) 

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