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Paper Abstract and Keywords
Presentation 2026-06-19 14:50
Principle Experiment on Quad Flat-Top Beam Transmission in Underwater Turbulent Channels
Kiichiro Kuwahara, Koemi Maekawa, Haruto Miyamoto, Takahiro Kodama (Kagawa Univ.) NS2026-43
Abstract (in Japanese) (See Japanese page) 
(in English) In this study, we investigate quad-beam technology as a method for increasing the capacity of underwater wireless optical communication （UWOC） and conduct proof‑of‑concept experiments to validate its feasibility. UWOC systems suffer from degradation of communication quality due to absorption, scattering, and turbulence in water. To mitigate these impairments and achieve high‑capacity, high‑quality transmission, we introduce a beam‑shaping technique that transforms a Gaussian beam into a flat‑top beam. Experimental results show that combining a quad‑beam configuration with flat‑top beam shaping enhances link stability, thereby demonstrating the feasibility of high‑capacity UWOC.
Keyword (in Japanese) (See Japanese page) 
(in English) underwater optical wireless communication / quad beam / flat-top beam / turbulence / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 75, NS2026-43, pp. 46-51, June 2026.
Paper # NS2026-43 
Date of Issue 2026-06-11 (NS) 
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 NS2026-43

Conference Information
Committee OCS NS PN  
Conference Date 2026-06-18 - 2026-06-19 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To NS 
Conference Code 2026-06-OCS-NS-PN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Principle Experiment on Quad Flat-Top Beam Transmission in Underwater Turbulent Channels 
Sub Title (in English)  
Keyword(1) underwater optical wireless communication  
Keyword(2) quad beam  
Keyword(3) flat-top beam  
Keyword(4) turbulence  
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1st Author's Name Kiichiro Kuwahara  
1st Author's Affiliation Kagawa University (Kagawa Univ.)
2nd Author's Name Koemi Maekawa  
2nd Author's Affiliation Kagawa University (Kagawa Univ.)
3rd Author's Name Haruto Miyamoto  
3rd Author's Affiliation Kagawa University (Kagawa Univ.)
4th Author's Name Takahiro Kodama  
4th Author's Affiliation Kagawa University (Kagawa Univ.)
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Speaker Author-1 
Date Time 2026-06-19 14:50:00 
Presentation Time 25 minutes 
Registration for NS 
Paper # NS2026-43 
Volume (vol) vol.126 
Number (no) no.75 
Page pp.46-51 
#Pages 6 
Date of Issue 2026-06-11 (NS) 

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