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| 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 |
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| 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 | |
| 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 | OFT2022-19 |
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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 |
| Keyword(5) | |
| Keyword(6) | |
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| Keyword(8) | |
| 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 |
| #Pages | 4 |
| Date of Issue | 2022-10-06 (OFT) |
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