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Paper Abstract and Keywords
Presentation 2026-02-19 16:00
Low Wavelength Dependent Polymer Waveguide type Multiplexer for MDM Link
Takumi Kanai, Takaaki Ishigure (Keio Univ.) OCS2025-64 OFT2025-88 OPE2025-105
Abstract (in Japanese) (See Japanese page) 
(in English) Wavelength division multiplexing (WDM) technology is currently introduced as a method for expanding the transmission capacity of optical fiber links. To achieve further capacity expansion, mode division multiplexing (MDM) technology is drawing attention. The simultaneous deployment of these two multiplexing technologies makes multiplicative multiplexing possible. However, many of the coupling elements currently investigated as multiplexers/demultiplexers (MUX/DEMUX) for MDM links exhibit high wavelength dependence, which presents a challenge for combination with WDM. In this research, a taper structured core in a polymer waveguides is designed through simulation analysis to reduce the wavelength dependence of mode coupling between two adjacent cores. A directional coupler-type polymer waveguide device is subsequently fabricated using the Mosquito method. As a result, the successful fabrication of a waveguide that exhibits a high coupling ratio, low loss, and low wavelength dependence (in the O-band) between single-mode and few-mode cores is achieved.
Keyword (in Japanese) (See Japanese page) 
(in English) The Mosquito method / Mode division multiplexing / Multi/Demultiplexer / Wavelength dependence / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 362, OPE2025-105, pp. 27-32, Feb. 2026.
Paper # OPE2025-105 
Date of Issue 2026-02-12 (OCS, 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 OCS2025-64 OFT2025-88 OPE2025-105

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 OPE 
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) Low Wavelength Dependent Polymer Waveguide type Multiplexer for MDM Link 
Sub Title (in English)  
Keyword(1) The Mosquito method  
Keyword(2) Mode division multiplexing  
Keyword(3) Multi/Demultiplexer  
Keyword(4) Wavelength dependence  
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1st Author's Name Takumi Kanai  
1st Author's Affiliation Keio University (Keio Univ.)
2nd Author's Name Takaaki Ishigure  
2nd Author's Affiliation Keio University (Keio Univ.)
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Speaker Author-1 
Date Time 2026-02-19 16:00:00 
Presentation Time 25 minutes 
Registration for OPE 
Paper # OCS2025-64, OFT2025-88, OPE2025-105 
Volume (vol) vol.125 
Number (no) no.360(OCS), no.361(OFT), no.362(OPE) 
Page pp.21-26(OCS), pp.13-18(OFT), pp.27-32(OPE) 
#Pages 6 
Date of Issue 2026-02-12 (OCS, OFT, OPE) 

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