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Paper Abstract and Keywords
Presentation 2020-11-12 14:35
Modeling of couplings between two degenerate linearly-polarized modes based on dual three-dimensional Stokes Space
Ryotaro Fukunaga, Koji Igarashi (Osaka Univ.) OFT2020-39
Abstract (in Japanese) (See Japanese page) 
(in English) In mode-division-multiplexed transmission in multi-mode fibers (MMFs), it is essential to compensate for couplings between modes using multiple-input and multiple-output (MIMO) signal processing in optical receivers. To design the MIMO implementation, it is helpful to model for mode couplings in MMFs. By analogy of the polarization rotation in optical fibers, two degenerate modes with dual polarization are expressed by 41 Jones vectors, and their couplings can be described by a 44 Jones matrix. By modeling the 44 Jones matrix by a random unitary matrix, the mode group delay in MMFs has been investigated. From the viewpoint of physics, it is doubtful that the Jones matrix can be modeled by completely random unitary matrix, because the couplings between two degenerate modes can be composed of independent polarization rotation and mode couplings in MMFs. In this study, we propose the modeling of the couplings between two degenerate modes using the Stokes space, which is usually used for polarization rotation. Assuming that polarization rotation and mode coupling are independent, we show that couplings between two degenerate modes can be visualized on dual three-dimensional Stokes spaces.
Keyword (in Japanese) (See Japanese page) 
(in English) mode-division-multiplexing / mode coupling / polarization rotation / / / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 230, OFT2020-39, pp. 11-16, Nov. 2020.
Paper # OFT2020-39 
Date of Issue 2020-11-05 (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 ITE-BCT OCS IEE-CMN  
Conference Date 2020-11-10 - 2020-11-11 
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 2020-11-OFT-BCT-OCS-CMN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Modeling of couplings between two degenerate linearly-polarized modes based on dual three-dimensional Stokes Space 
Sub Title (in English)  
Keyword(1) mode-division-multiplexing  
Keyword(2) mode coupling  
Keyword(3) polarization rotation  
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1st Author's Name Ryotaro Fukunaga  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Koji Igarashi  
2nd Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-1 
Date Time 2020-11-12 14:35:00 
Presentation Time 25 minutes 
Registration for OFT 
Paper # OFT2020-39 
Volume (vol) vol.120 
Number (no) no.230 
Page pp.11-16 
#Pages 6 
Date of Issue 2020-11-05 (OFT) 

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