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Paper Abstract and Keywords
Presentation 2022-10-13 10:50
[Poster Presentation] Observation and suppression of temperature-dependent spectral power change in multimode FBG
Kazuya Kishizawa (YNU), Kohei Noda (YNU/Tokyo Tech), Heeyoung Lee (SIT), Kentaro Nakamura (Tokyo Tech), Yosuke Mizuno (YNU) OFT2022-24
Abstract (in Japanese) (See Japanese page) 
(in English) Optical fiber sensors have been extensively studied as a promising alternative for electrical sensors because of their ease of handling and no power supply required. Among various types of optical fiber sensors, fiber Bragg gratings (FBGs) have been extensively used for single-point and multi-point measurements. FBGs are mostly inscribed in single-mode fibers, but it is feasible to inscribe FBGs in multimode fibers Multimode FBGs are resistant to bending and can measure multiple physical quantities in a discriminative manner. However, when the temperature dependence of the dip in the transmitted spectrum is measured using a simple experimental setup, significant fluctuations of its spectral power are observed. In this study, we find that the temperature-dependent spectral power fluctuations in multimode FBGs are caused by modal interference in the multimode fiber. We also experimentally show that the power fluctuations can be suppressed by using the peak of the reflected spectrum instead of the dip of the transmitted spectrum.
Keyword (in Japanese) (See Japanese page) 
(in English) Optical fiber sensors / fiber Bragg gratings / multimode fibers / modal interference / / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 210, OFT2022-24, pp. 25-28, Oct. 2022.
Paper # OFT2022-24 
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) Observation and suppression of temperature-dependent spectral power change in multimode FBG 
Sub Title (in English)  
Keyword(1) Optical fiber sensors  
Keyword(2) fiber Bragg gratings  
Keyword(3) multimode fibers  
Keyword(4) modal interference  
1st Author's Name Kazuya Kishizawa  
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 10:50:00 
Presentation Time 70 minutes 
Registration for OFT 
Paper # OFT2022-24 
Volume (vol) vol.122 
Number (no) no.210 
Page pp.25-28 
Date of Issue 2022-10-06 (OFT) 

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