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Multi-band CAP for next generation optical access networks using 10-G optics

Wei, Jinlong and Giacoumidis, Elias orcid logoORCID: 0000-0002-1161-7837 (2018) Multi-band CAP for next generation optical access networks using 10-G optics. Journal of Lightwave Technology, 36 (2). pp. 551-559. ISSN 0733-8724

40-Gb/s/λ multi-band carrierless amplitude and phase (CAP) modulation long reach passive optical networks (LR-PONs) were demonstrated using 10-G class transceivers only. A major issue of multi-band CAP is that it is vulnerable to timing error and this work has offered quantitative analysis about it in detail for the first time. A novel simple timing recovery approach, partial differential QAM constellation encoding and decoding schemes together with blind multi-modulus algorithms (MMAs) equalization are proposed to address the issue efficiently, enabling zero-overhead signal recovery. Results show that it can offer excellent system tolerance to timing error of at least ±0.1 symbol period even for the highest frequency CAP sub-band. The characteristics of the transceiver are measured and optimization of critical system parameters is performed including the CAP sub-band count, 10-G Mach-Zehnder intensity modulator operation conditions, optical launch power, and wavelength offset asymmetrical optical filtering. For downlink using erbium-doped fiber amplifier (EDFA) pre-amplifiers, successful 40-Gb/s multi-band CAP signal transmission over an 80-km (90-km) SMF is achieved with a link power budget of 33 dB (29 dB) considering a FEC threshold BER of 3.8×10-3.
Item Type:Article (Published)
Uncontrolled Keywords:long reach passive optical network; Carrierless amplitude and phase modulation; Modulation format; Multi-modulus algorithm; Partial differential QAM; Optical power budget; Blind equalization; Timing error; Timing recovery; phase ambiguity; cycle slip.
Subjects:Engineering > Optical communication
DCU Faculties and Centres:DCU Faculties and Schools > Faculty of Engineering and Computing > School of Electronic Engineering
Research Institutes and Centres > Research Institute for Networks and Communications Engineering (RINCE)
Publisher:Institute of Electrical and Electronics Engineers and Optical Society of America
Official URL:https://doi.org/10.1109/JLT.2017.2772894
Copyright Information:© 2017 IEEE
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:European Union (EU) under Marie Curie Intra-European Fellowship for Career Development via CEEOALAN (grant number 623515), EU’s Horizon 2020 research and innovation programme under the Marie Curie project EPIC (grant number 713567
ID Code:22357
Deposited On:09 May 2018 09:40 by Ilias Giakoumidis . Last Modified 12 Aug 2022 17:01

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