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Paper Abstract and Keywords
Presentation 2020-10-08 10:50
[Poster Presentation] Arbitrary-wavelength operation of FBGs inscribed in plastic optical fibers
Naoki Motoishi, Kohei Noda (Tokyo Tech), Heeyoung Lee (SIT), Antreas Theodosiou, Kyriacos Kalli (CUT), Kentaro Nakamura (Tokyo Tech), Yosuke Mizuno (YNU) OFT2020-18
Abstract (in Japanese) (See Japanese page) 
(in English) Strain can be detected at high speed using a fiber Bragg gratings (FBG) by measuring the optical power fluctuations at the central wavelength of the slope of the reflected spectrum, instead of measuring the Bragg wavelength shift directly. In this high-speed strain detection, a narrow-linewidth laser with a wavelength at the center of the slope is generally used, but the accurate pre-design of the inscription pitch of the FBG leads to its high fabrication cost. In this work, using an FBG inscribed in a perfluorinated graded-index plastic optical fiber (multimode fiber), we show that Bragg wavelengths appear in arbitrary wavelength ranges of the reflection spectrum. This unique behavior can be obtained by suppressing the excitation of the fundamental propagation mode and promoting the excitation of the higher modes. We experimentally show that, by exploiting this feature, high-speed strain measurement can be performed at almost arbitrary wavelengths. We also investigate the wavelength dependence of the vibration sensing performance (sensitivity, etc).
Keyword (in Japanese) (See Japanese page) 
(in English) optical fiber sensing / fiber Bragg gratings (FBGs) / strain sensors / vibration sensors / plastic optical fibers / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 184, OFT2020-18, pp. 37-40, Oct. 2020.
Paper # OFT2020-18 
Date of Issue 2020-10-01 (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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Conference Information
Committee OFT  
Conference Date 2020-10-08 - 2020-10-09 
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 2020-10-OFT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Arbitrary-wavelength operation of FBGs inscribed in plastic optical fibers 
Sub Title (in English)  
Keyword(1) optical fiber sensing  
Keyword(2) fiber Bragg gratings (FBGs)  
Keyword(3) strain sensors  
Keyword(4) vibration sensors  
Keyword(5) plastic optical fibers  
Keyword(6)  
Keyword(7)  
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1st Author's Name Naoki Motoishi  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
2nd Author's Name Kohei Noda  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech)
3rd Author's Name Heeyoung Lee  
3rd Author's Affiliation Shibaura Institute of Technology (SIT)
4th Author's Name Antreas Theodosiou  
4th Author's Affiliation Cyprus University of Technology (CUT)
5th Author's Name Kyriacos Kalli  
5th Author's Affiliation Cyprus University of Technology (CUT)
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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Speaker Author-1 
Date Time 2020-10-08 10:50:00 
Presentation Time 40 minutes 
Registration for OFT 
Paper # OFT2020-18 
Volume (vol) vol.120 
Number (no) no.184 
Page pp.37-40 
#Pages 4 
Date of Issue 2020-10-01 (OFT) 

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