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| Presentation | 2021-10-14 13:00 [Poster Presentation] Strain dynamic range extension in slope-assisted BOCDR based on down-conversion of Brillouin frequency shift Haruki Sasage, Mana Sakamoto (SIT), Kohei Noda (Tokyo Tech/YNU), Kentaro Nakamura (Tokyo Tech), Yosuke Mizuno (YNU), Heeyoung Lee (SIT)  OFT2021-36 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Brillouin optical correlation-domain reflectometry (BOCDR) is known as a distributed strain and temperature sensing technique with numerous merits including single-end operation, high spatial resolution, random accessibility, and cost efficiency. To boost the operation speed of BOCDR, a frequency-sweeping-free configuration called slope-assisted BOCDR was developed, which enabled real-time operation at the cost of limited strain dynamic range. In addition, use of an electrical spectrum analyzer (ESA) degraded the system size and cost. In this work, we develop a new method for obtaining the strain information by (1) beating down of the Brillouin gain spectrum (BGS), (2) directing the BGS to a low-pass filter, and (3) measuring the power of the electrical output from the low-pass filter. This system does not include an ESA, and in addition, the strain dynamic range is expected to be doubled. Herein, in the case of full-length measurement (not distributed measurement), basic operation of this system is demonstrated with enhanced strain dynamic range. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Optical fiber sensors / Brillouin scattering / Distributed measurement / Correlation-domain techniques / Beating down / Low-pass filters / Strain dynamic range / | |
| Reference Info. | IEICE Tech. Rep., vol. 121, no. 199, OFT2021-36, pp. 59-62, Oct. 2021. | |
| Paper # | OFT2021-36 | |
| Date of Issue | 2021-10-07 (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 | OFT2021-36 |
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| 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) | Strain dynamic range extension in slope-assisted BOCDR based on down-conversion of Brillouin frequency shift |
| Sub Title (in English) | |
| Keyword(1) | Optical fiber sensors |
| Keyword(2) | Brillouin scattering |
| Keyword(3) | Distributed measurement |
| Keyword(4) | Correlation-domain techniques |
| Keyword(5) | Beating down |
| Keyword(6) | Low-pass filters |
| Keyword(7) | Strain dynamic range |
| Keyword(8) | |
| 1st Author's Name | Haruki Sasage |
| 1st Author's Affiliation | Shibaura Institute of Technology (SIT) |
| 2nd Author's Name | Mana Sakamoto |
| 2nd Author's Affiliation | Shibaura Institute of Technology (SIT) |
| 3rd Author's Name | Kohei Noda |
| 3rd Author's Affiliation | Tokyo Institute of Technology/Yokohama National University (Tokyo Tech/YNU) |
| 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) |
| 6th Author's Name | Heeyoung Lee |
| 6th Author's Affiliation | Shibaura Institute of Technology (SIT) |
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| Speaker | Author-1 |
| Date Time | 2021-10-14 13:00:00 |
| Presentation Time | 80 minutes |
| Registration for | OFT |
| Paper # | OFT2021-36 |
| Volume (vol) | vol.121 |
| Number (no) | no.199 |
| Page | pp.59-62 |
| #Pages | 4 |
| Date of Issue | 2021-10-07 (OFT) |
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