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Paper Abstract and Keywords
Presentation 2022-10-13 09:30
[Poster Presentation] Brillouin optical correlation-domain reflectometry using low-coherence light
Kenta Otsubo (YNU), Kohei Noda (YNU/Tokyo Tech), Heeyoung Lee (SIT), Kentaro Nakamura (Tokyo Tech), Yosuke Mizuno (YNU) OFT2022-19
Abstract (in Japanese) (See Japanese page) 
(in English) As a principle of distributed measurement of strain and temperature along an optical fiber, the strain/temperature dependencies of the frequency shift accompanied by Brillouin scattering have been widely utilized. Among various configurations already reported, a correlation-domain method has high spatial resolution even with a standard setup; for instance, strain distributions can be obtained with millimeter-order resolution. To make the most of this advantage, Brillouin optical correlation-domain analysis (BOCDA) using a low-coherence light source has been developed. In this low-coherence BOCDA, as its spatial resolution is determined by the coherence length of the light source, submillimeter spatial resolution can be achieved. However, the need for both-end light injection to a sensing fiber and the high cost associated with probe light generation and lock-in detection (which are problems specific to BOCDA), still remains to be solved. In this work, to overcome this problem, we newly propose low-coherence Brillouin optical correlation-domain reflectometry (BOCDR), which is single-ended, relatively low in cost, and with high spatial resolution. We quantitatively evaluate the theoretical spatial resolution of the low-coherence BOCDR and verify its practicability as a new measurement technique by demonstrating distributed measurements under various experimental conditions.
Keyword (in Japanese) (See Japanese page) 
(in English) Optical fiber sensors / Brillouin optical correlation-domain reflectometry (BOCDR) / low coherence / noise modulation / / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 210, OFT2022-19, pp. 5-8, Oct. 2022.
Paper # OFT2022-19 
Date of Issue 2022-10-06 (OFT) 
ISSN 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 2022-10-13 - 2022-10-14 
Place (in Japanese) (See Japanese page) 
Place (in English) Kanagawa-Kenmin Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To OFT 
Conference Code 2022-10-OFT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Brillouin optical correlation-domain reflectometry using low-coherence light 
Sub Title (in English)  
Keyword(1) Optical fiber sensors  
Keyword(2) Brillouin optical correlation-domain reflectometry (BOCDR)  
Keyword(3) low coherence  
Keyword(4) noise modulation  
1st Author's Name Kenta Otsubo  
1st Author's Affiliation Yokohama National University (YNU)
2nd Author's Name Kohei Noda  
2nd Author's Affiliation Yokohama National University/Tokyo Institute of Technology (YNU/Tokyo Tech)
3rd Author's Name Heeyoung Lee  
3rd Author's Affiliation Shibaura Institute of Technology (SIT)
4th Author's Name Kentaro Nakamura  
4th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
5th Author's Name Yosuke Mizuno  
5th Author's Affiliation Yokohama National University (YNU)
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Speaker Author-1 
Date Time 2022-10-13 09:30:00 
Presentation Time 70 minutes 
Registration for OFT 
Paper # OFT2022-19 
Volume (vol) vol.122 
Number (no) no.210 
Page pp.5-8 
Date of Issue 2022-10-06 (OFT) 

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