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Paper Abstract and Keywords
Presentation 2022-10-13 09:30
[Poster Presentation] Extension of measurement range in OCDR based on double-modulation scheme
Mana Sakamoto (YNU/SIT), Tomoya Miyamae (YNU), Kohei Noda (YNU/Tokyo Tech), Kentaro Nakamura (Tokyo Tech), Heeyoung Lee (SIT), Yosuke Mizuno (YNU) OFT2022-20
Abstract (in Japanese) (See Japanese page) 
(in English) For the past several decades, as a promising method for monitoring the soundness of optical fiber communication networks, distributed reflectivity sensing, which can measure the positions and reflectivities of poor connection points and other reflection points along optical fibers, has attracted considerable attention. Among various distributed reflectivity sensing techniques, we have been focusing on optical correlation-domain reflectometry (OCDR), which has random accessibility (high-speed measurement capability at any position along the sensing fiber), real-time operability, and cost efficiency (working with relatively inexpensive lasers). It is well known that Brillouin OCDR (BOCDR) for distributed strain and temperature sensing suffers from a trade-off relationship between spatial resolution and measurement range, and a double-modulation scheme was developed to mitigate this problem. In contrast, in OCDR, it was assumed that the spatial resolution is not affected by the measurement range. However, recently, it has been clarified both theoretically and experimentally that the spatial resolution of OCDR also suffers from a trade-off relationship with the measurement range. Thus, a technique for extending the measurement range while maintaining the spatial resolution of OCDR is important. In this work, we demonstrate that the measurement range of OCDR can also be extended while maintaining spatial resolution on the basis of the double-modulation scheme.
Keyword (in Japanese) (See Japanese page) 
(in English) Optical fiber sensors / optical correlation-domain reflectometry (OCDR) / distributed reflectivity measurement / double-modulation scheme / / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 210, OFT2022-20, pp. 9-12, Oct. 2022.
Paper # OFT2022-20 
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) Extension of measurement range in OCDR based on double-modulation scheme 
Sub Title (in English)  
Keyword(1) Optical fiber sensors  
Keyword(2) optical correlation-domain reflectometry (OCDR)  
Keyword(3) distributed reflectivity measurement  
Keyword(4) double-modulation scheme  
1st Author's Name Mana Sakamoto  
1st Author's Affiliation Yokohama National University/Shibaura Institute of Technology (YNU/SIT)
2nd Author's Name Tomoya Miyamae  
2nd Author's Affiliation Yokohama National University (YNU)
3rd Author's Name Kohei Noda  
3rd Author's Affiliation Yokohama National University/Tokyo Institute of Technology (YNU/Tokyo Tech)
4th Author's Name Kentaro Nakamura  
4th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
5th Author's Name Heeyoung Lee  
5th Author's Affiliation Shibaura Institute of Technology (SIT)
6th Author's Name Yosuke Mizuno  
6th 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 # OFT2022-20 
Volume (vol) vol.122 
Number (no) no.210 
Page pp.9-12 
Date of Issue 2022-10-06 (OFT) 

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