Paper Abstract and Keywords |
Presentation |
2019-05-16 14:00
[Poster Presentation]
External modulation scheme for Brillouin OCDR Kohei Noda, Heeyoung Lee, Yosuke Mizuno, Kentaro Nakamura (Tokyo Tech) OFT2019-2 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
All the configurations of Brillouin optical correlation-domain reflectometry (Brillouin OCDR; BOCDR) previously reported have been based on the direct modulation of the laser driving current. However, it poses three disadvantages: (i) standard lasers are not designed for high-speed large-amplitude modulation, (ii) frequency modulation inevitably accompanies power modulation, and (iii) the modulation amplitude and frequency are mutually dependent. To date, we have developed a new configuration called an external-modulation scheme and already demonstrated that the drawbacks (i) and (iii) can be mitigated in OCDR, which is based not on Brillouin scattering but on Rayleigh scattering and Fresnel reflection. However, distributed strain measurement based on BOCDR with the external-modulation scheme has not been demonstrated yet, because the power of the frequency-modulated light is not sufficiently high. In this work, by properly amplifying the frequency-modulated light, we demonstrate basic operation of BOCDR based on the external-modulation scheme. We show that, when strain of less than ~0.7% is applied to a 0.8-m-long section of a 2.8-m-long fiber, the obtained distributions of the Brillouin gain spectrum and the Brillouin frequency shift are in good agreement with simulation results. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
optical fiber sensing / distributed strain measurement / Brillouin scattering / BOCDR / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 119, no. 33, OFT2019-2, pp. 7-10, May 2019. |
Paper # |
OFT2019-2 |
Date of Issue |
2019-05-09 (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) |
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OFT2019-2 |
Conference Information |
Committee |
OFT |
Conference Date |
2019-05-16 - 2019-05-17 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
I-site NANBA |
Topics (in Japanese) |
(See Japanese page) |
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Paper Information |
Registration To |
OFT |
Conference Code |
2019-05-OFT |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
External modulation scheme for Brillouin OCDR |
Sub Title (in English) |
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Keyword(1) |
optical fiber sensing |
Keyword(2) |
distributed strain measurement |
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Brillouin scattering |
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BOCDR |
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1st Author's Name |
Kohei Noda |
1st Author's Affiliation |
Tokyo Institute of Technology (Tokyo Tech) |
2nd Author's Name |
Heeyoung Lee |
2nd Author's Affiliation |
Tokyo Institute of Technology (Tokyo Tech) |
3rd Author's Name |
Yosuke Mizuno |
3rd Author's Affiliation |
Tokyo Institute of Technology (Tokyo Tech) |
4th Author's Name |
Kentaro Nakamura |
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Tokyo Institute of Technology (Tokyo Tech) |
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Speaker |
Author-1 |
Date Time |
2019-05-16 14:00:00 |
Presentation Time |
100 minutes |
Registration for |
OFT |
Paper # |
OFT2019-2 |
Volume (vol) |
vol.119 |
Number (no) |
no.33 |
Page |
pp.7-10 |
#Pages |
4 |
Date of Issue |
2019-05-09 (OFT) |
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