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Paper Abstract and Keywords
Presentation 2026-03-02 12:15
In-Service Laser Anomaly Detection based on Digital Signal Processing
Taisei Sekizuka, Koki Mano, Takuma Kuno, Hiroshi Hasegawa (Nagoya Univ.), Yojiro Mori (Toyota Tech. Inst.) PN2025-49
Abstract (in Japanese) (See Japanese page) 
(in English) In high-capacity optical communication systems, variations in laser characteristics can cause severe degradation in signal quality. Therefore, continuous monitoring of laser characteristics under actual transmission conditions is an important issue. Conventionally, laser characterization is performed by directly analyzing the continuous-wave output of the laser. However, applying such techniques to practical optical networks is difficult. In this paper, we propose a digital-signal-processing-based method for continuously monitoring laser characteristics under transmission conditions. The proposed method extracts laser characteristics from digital signal processing data in the receiver. This enables laser monitoring without additional hardware. The effectiveness of the proposed method is confirmed through numerical simulations and transmission experiments using 100 Gbaud dual-polarization quadrature phase-shift keying signals over transmission distances exceeding 1,000 km.
Keyword (in Japanese) (See Japanese page) 
(in English) Digital Signal Processing / Optical Performance Monitoring / Laser Phase Noise / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 372, PN2025-49, pp. 41-46, March 2026.
Paper # PN2025-49 
Date of Issue 2026-02-23 (PN) 
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 PN2025-49

Conference Information
Committee PN  
Conference Date 2026-03-02 - 2026-03-04 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To PN 
Conference Code 2026-03-PN 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) In-Service Laser Anomaly Detection based on Digital Signal Processing 
Sub Title (in English) * 
Keyword(1) Digital Signal Processing  
Keyword(2) Optical Performance Monitoring  
Keyword(3) Laser Phase Noise  
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1st Author's Name Taisei Sekizuka  
1st Author's Affiliation Nagoya University (Nagoya Univ.)
2nd Author's Name Koki Mano  
2nd Author's Affiliation Nagoya University (Nagoya Univ.)
3rd Author's Name Takuma Kuno  
3rd Author's Affiliation Nagoya University (Nagoya Univ.)
4th Author's Name Hiroshi Hasegawa  
4th Author's Affiliation Nagoya University (Nagoya Univ.)
5th Author's Name Yojiro Mori  
5th Author's Affiliation Toyota Technological Institute (Toyota Tech. Inst.)
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Speaker Author-1 
Date Time 2026-03-02 12:15:00 
Presentation Time 25 minutes 
Registration for PN 
Paper # PN2025-49 
Volume (vol) vol.125 
Number (no) no.372 
Page pp.41-46 
#Pages 6 
Date of Issue 2026-02-23 (PN) 

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