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Paper Abstract and Keywords
Presentation 2021-10-14 10:30
[Poster Presentation] World-fastest operation of OCDR without spatial resolution deterioration
Tomoya Miyamae, Zhu Guangtao, Takaki Kiyozumi (YNU), Kohei Noda (Tokyo Tech/YNU), Heeyoung Lee (SIT), Kentaro Nakamura (Tokyo Tech), Yosuke Mizuno (YNU) OFT2021-23
Abstract (in Japanese) (See Japanese page) 
(in English) Recent rapid growth of optical fiber communication has led to a significant demand for health monitoring technology of optical fiber communication networks. One of the promising techniques that can be used to detect defects and/or breakage points along a fiber is optical correlation-domain reflectometry (OCDR), which can measure the reflected power distributions along an optical fiber. The OCDR system has been simplified from several aspects; for instance, an acousto-optic modulator for optical heterodyne detection or a reference path was removed from the setup. However, further simplification of the system is required for its practical applications. To date, we have developed a simplified OCDR that does not utilize an electrical spectrum analyzer (ESA) for processing electrical signals, and experimentally verified that the ESA-free system shows stable and high-speed operation (repetition rate: up to 100 Hz) even with a high spatial resolution, suggesting the possibility of higher-speed operation. In this work, the ESA-free OCDR was used to measure the reflected power distributions at a repetition rate of 1 kHz, which is 10 times faster than the highest value ever reported. We also demonstrate that our system can mitigate the trade-off relationship between operating speed and spatial resolution, which will boost the potential applicability of OCDR.
Keyword (in Japanese) (See Japanese page) 
(in English) optical fiber sensors / optical correlation-domain reflectometry(OCDR) / distributed reflectivity measurement / high-speed operation / spatial resolution / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 199, OFT2021-23, pp. 9-12, Oct. 2021.
Paper # OFT2021-23 
Date of Issue 2021-10-07 (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)
Download PDF OFT2021-23

Conference Information
Committee OFT  
Conference Date 2021-10-14 - 2021-10-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To OFT 
Conference Code 2021-10-OFT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) World-fastest operation of OCDR without spatial resolution deterioration 
Sub Title (in English)  
Keyword(1) optical fiber sensors  
Keyword(2) optical correlation-domain reflectometry(OCDR)  
Keyword(3) distributed reflectivity measurement  
Keyword(4) high-speed operation  
Keyword(5) spatial resolution  
1st Author's Name Tomoya Miyamae  
1st Author's Affiliation Yokohama National University (YNU)
2nd Author's Name Zhu Guangtao  
2nd Author's Affiliation Yokohama National University (YNU)
3rd Author's Name Takaki Kiyozumi  
3rd Author's Affiliation Yokohama National University (YNU)
4th Author's Name Kohei Noda  
4th Author's Affiliation Tokyo Institute of Technology/Yokohama National University (Tokyo Tech/YNU)
5th Author's Name Heeyoung Lee  
5th Author's Affiliation Shibaura Institute of Technology (SIT)
6th Author's Name Kentaro Nakamura  
6th Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
7th Author's Name Yosuke Mizuno  
7th Author's Affiliation Yokohama National University (YNU)
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Date Time 2021-10-14 10:30:00 
Presentation Time 80 
Registration for OFT 
Paper # IEICE-OFT2021-23 
Volume (vol) IEICE-121 
Number (no) no.199 
Page pp.9-12 
#Pages IEICE-4 
Date of Issue IEICE-OFT-2021-10-07 

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