Paper Abstract and Keywords |
Presentation |
2022-11-11 14:15
Time-resolve constellation monitoring of quadrature amplitude modulation optical signals with time-and-frequency slicing-and-synthesizing method Tsubasa Fujiwara, Koji Igarashi (Osaka Univ), Fumihiko Ito (Shimane Univ) OCS2022-47 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
In coherent transmission systems, we require simple constellation monitoring of quadrature amplitude modulation (QAM) optical signals without signal equalization. We propose a spectrally slicing-and-synthesizing method, where narrow bandwidth slices of periodic optical signals are sequentially measured using low-speed coherent receivers, and they are synthesized by signal processing. In the method, the laser coherence time is required to be longer than the temporal period of the optical signals because the phase noise is suppresed based on the periodicity of the optical signal. To avoid the limitation due to the laser coherence time, we propose a time-and-frequency slicing-and-synthesizing method to divide signal components in not only the spectral domain but also the temporal domain, enabling to measure time-resolve constellation monitoring. With our proposed method, we measure time-resolve constellation diagrams of 12.5-Gbaud quadrature phase shift keying and 16QAM optical signals using a 2-Gsample/sec oscilloscope with a 400-MHz bandwidth. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
optical measurement / complex field measurement / quadrature modulation signal / / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 122, no. 245, OCS2022-47, pp. 41-45, Nov. 2022. |
Paper # |
OCS2022-47 |
Date of Issue |
2022-11-03 (OCS) |
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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OCS2022-47 |
Conference Information |
Committee |
ITE-BCT OCS IEE-CMN OFT |
Conference Date |
2022-11-10 - 2022-11-11 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Forest-Sendai |
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(See Japanese page) |
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Paper Information |
Registration To |
OCS |
Conference Code |
2022-11-BCT-OCS-CMN-OFT |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Time-resolve constellation monitoring of quadrature amplitude modulation optical signals with time-and-frequency slicing-and-synthesizing method |
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optical measurement |
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complex field measurement |
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quadrature modulation signal |
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1st Author's Name |
Tsubasa Fujiwara |
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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Fumihiko Ito |
3rd Author's Affiliation |
Shimane University (Shimane Univ) |
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Speaker |
Author-1 |
Date Time |
2022-11-11 14:15:00 |
Presentation Time |
25 minutes |
Registration for |
OCS |
Paper # |
OCS2022-47 |
Volume (vol) |
vol.122 |
Number (no) |
no.245 |
Page |
pp.41-45 |
#Pages |
5 |
Date of Issue |
2022-11-03 (OCS) |
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