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Comprehensive Study of Equalization-Enhanced Phase Noise in Coherent Optical Systems
RISE - Research Institutes of Sweden, ICT, Acreo.
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2015 (English)In: Journal of Lightwave Technology, ISSN 0733-8724, E-ISSN 1558-2213, Vol. 33, no 23, 4834-4841 p.Article in journal (Refereed) Published
Abstract [en]

A thorough analysis of equalization-enhanced phase noise (EEPN) and its impact on the coherent optical system is presented. We show with a time-domain analysis that EEPN is caused due to the interference of multiple delayed versions of the dispersed signal, generated by intermixing of the received dispersed signal, and the noise side bands of the local oscillator (LO) in the photodetectors. We derive statistical properties such as the mean, variance, and error vector magnitude of the received signal influenced with EEPN. We show that in coherent optical systems utilizing electronic dispersion compensation, this noise corresponds to multipath fading in wireless communication systems. Closed-form expressions of necessary LO linewidth and/or mitigation bandwidth for a general system configuration and specified OSNR penalty are given. The expressions for system design parameters, validated with system simulations, show that higher order modulation formats, such as 16-quadrature amplitude modulation and beyond, put stringent demands on the LO linewidth unless a mitigation technique is used.

Place, publisher, year, edition, pages
2015. Vol. 33, no 23, 4834-4841 p.
Keyword [en]
equalisers;optical fibre communication;optical modulation;optical noise;phase noise;time-domain analysis;16-quadrature amplitude modulation;EEPN;LO linewidth;OSNR;coherent optical systems;equalization-enhanced phase noise;higher order modulation formats;local oscillator;photodetectors;time-domain analysis;Adaptive optics;Dispersion;Optical noise;Phase shift keying;Signal to noise ratio;Coherent receivers;digital signal processing (DSP);electronic dispersion compensation (EDC);equalization-enhanced phase noise (EEPN);laser linewidth;multipath fading;optical communication;quadrature amplitude modulation (QAM)
National Category
Communication Systems Signal Processing Telecommunications
Identifiers
URN: urn:nbn:se:ri:diva-29874DOI: 10.1109/JLT.2015.2491363OAI: oai:DiVA.org:ri-29874DiVA: diva2:1108489
Available from: 2017-06-12 Created: 2017-06-12 Last updated: 2017-06-15Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
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