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Paper Abstract and Keywords
Presentation 2026-02-20 10:55
High-speed automatic fabrication of fiber Bragg gratings (FBGs) using a femtosecond-laser continuous-scan point-by-point writing method and spectral characterization
Yuma Matsushita, Mitsuki Okumura (APU), Shigenori Itsuzaki, Masato Takaya, Akihiko Koyama (TATSUTA), Masaya Sugimoto, Kenji Goya (APU) OFT2025-94 OPE2025-113
Abstract (in Japanese) (See Japanese page) 
(in English) We first introduced an image-based automatic core-centering (auto-alignment) mechanism to automate the position correction during femtosecond-laser point-by-point FBG writing. For speed-up, a mechanical-shutter pseudo-burst scheme gated a 100-kHz pulse train at 10 Hz, achieving a 5.0-mm grating in 4 min, although the spectral characteristics degraded. Finally, a continuous-scan point-by-point method enabled high-throughput fabrication of a 5.0-mm FBG in ~5 s while maintaining a well-defined spectrum.
Keyword (in Japanese) (See Japanese page) 
(in English) Optical fiber / FBG / Femtosecond laser / Point-by-point writing / Continuous scan / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 361, OFT2025-94, pp. 44-47, Feb. 2026.
Paper # OFT2025-94 
Date of Issue 2026-02-12 (OFT, OPE) 
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 OFT2025-94 OPE2025-113

Conference Information
Committee OCS OFT OPE  
Conference Date 2026-02-19 - 2026-02-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Minna-No-Kashikaigishitsu Naha-Asahimachi-Ten 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To OFT 
Conference Code 2026-02-OCS-OFT-OPE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) High-speed automatic fabrication of fiber Bragg gratings (FBGs) using a femtosecond-laser continuous-scan point-by-point writing method and spectral characterization 
Sub Title (in English)  
Keyword(1) Optical fiber  
Keyword(2) FBG  
Keyword(3) Femtosecond laser  
Keyword(4) Point-by-point writing  
Keyword(5) Continuous scan  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Yuma Matsushita  
1st Author's Affiliation Akita Prefectural Univ. (APU)
2nd Author's Name Mitsuki Okumura  
2nd Author's Affiliation Akita Prefectural Univ. (APU)
3rd Author's Name Shigenori Itsuzaki  
3rd Author's Affiliation TATSUTA Electric Wire and Cable Co., Ltd. (TATSUTA)
4th Author's Name Masato Takaya  
4th Author's Affiliation TATSUTA Electric Wire and Cable Co., Ltd. (TATSUTA)
5th Author's Name Akihiko Koyama  
5th Author's Affiliation TATSUTA Electric Wire and Cable Co., Ltd. (TATSUTA)
6th Author's Name Masaya Sugimoto  
6th Author's Affiliation Akita Prefectural Univ. (APU)
7th Author's Name Kenji Goya  
7th Author's Affiliation Akita Prefectural Univ. (APU)
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Speaker Author-1 
Date Time 2026-02-20 10:55:00 
Presentation Time 25 minutes 
Registration for OFT 
Paper # OFT2025-94, OPE2025-113 
Volume (vol) vol.125 
Number (no) no.361(OFT), no.362(OPE) 
Page pp.44-47(OFT), pp.68-71(OPE) 
#Pages 4 
Date of Issue 2026-02-12 (OFT, OPE) 

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