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Paper Abstract and Keywords
Presentation 2026-01-15 14:55
A Study of Chromatic-Dispersion Pre-Compensation Scheme for over-50 Gbps Metro-Access Converged PtMP Networks
Jin Uchiyama, Ryo Koma, Kazutaka Hara, Jun-ichi Kani, Tatsuya Shimada (AS Labs) CS2025-66
Abstract (in Japanese) (See Japanese page) 
(in English) As a method for compensating the effect of wavelength dispersion while keeping the user transceiver configuration simple, Chromatic-Dispersion Pre-Compensation (CD-DPC) system has been proposed in which the inverse characteristic of wavelength dispersion is calculated from the transmission distance, wavelength, and dispersion coefficient of a fiber, and applied to a transmission signal using an IQ modulator to enable application of a direct-detection optical receiver. However, in order to measure the dispersion coefficient of the fiber end-to-end, a dedicated equipment is required, which increases the cost. When the dispersion coefficient of the fiber is not measured, a typical value or the like is used as the calculation parameter of the inverse characteristic, so that a difference occurs between the calculation parameter and the dispersion coefficient of the actual fiber due to the dispersion of the dispersion coefficient of the fiber, and the value of the inverse characteristic cannot be accurately calculated, which causes a decrease in reception sensitivity. In this study, by calculating the inverse characteristic applied to the transmission signal from the reception signal of the uplink communication, we propose a new CD-DPC method that does not cause the lowering of the reception sensitivity due to the dispersion coefficient of the fiber, and evaluate the transmission characteristic by simulation.
Keyword (in Japanese) (See Japanese page) 
(in English) chromatic dispersion compensation / IM-DD / digital signal processing / chromatic dispersion pre-compensation / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 315, CS2025-66, pp. 47-52, Jan. 2026.
Paper # CS2025-66 
Date of Issue 2026-01-08 (CS) 
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 CS2025-66

Conference Information
Committee OCS CS  
Conference Date 2026-01-15 - 2026-01-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Hakodate Chamber of Commerce and Industry 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To CS 
Conference Code 2026-01-OCS-CS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study of Chromatic-Dispersion Pre-Compensation Scheme for over-50 Gbps Metro-Access Converged PtMP Networks 
Sub Title (in English)  
Keyword(1) chromatic dispersion compensation  
Keyword(2) IM-DD  
Keyword(3) digital signal processing  
Keyword(4) chromatic dispersion pre-compensation  
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1st Author's Name Jin Uchiyama  
1st Author's Affiliation Access Network Service Systems Labs (AS Labs)
2nd Author's Name Ryo Koma  
2nd Author's Affiliation Access Network Service Systems Labs (AS Labs)
3rd Author's Name Kazutaka Hara  
3rd Author's Affiliation Access Network Service Systems Labs (AS Labs)
4th Author's Name Jun-ichi Kani  
4th Author's Affiliation Access Network Service Systems Labs (AS Labs)
5th Author's Name Tatsuya Shimada  
5th Author's Affiliation Access Network Service Systems Labs (AS Labs)
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Speaker Author-1 
Date Time 2026-01-15 14:55:00 
Presentation Time 25 minutes 
Registration for CS 
Paper # CS2025-66 
Volume (vol) vol.125 
Number (no) no.315 
Page pp.47-52 
#Pages 6 
Date of Issue 2026-01-08 (CS) 

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