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Mitigation of EEPN in Coherent Optical Systems With Low-Speed Digital Coherence Enhancement
RISE - Research Institutes of Sweden, ICT, Acreo.
RISE - Research Institutes of Sweden, ICT, Acreo.
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2015 (English)In: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 27, no 18, 1942-1945 p.Article in journal (Refereed) Published
Abstract [en]

A method for mitigating local oscillator (LO) phase noise-induced impairment, also known as equalization-enhanced phase noise, in coherent optical systems is discussed. The method is suitable for real-time implementation and requires hardware with a bandwidth much lower than the signal baud rate, even for a system utilizing conventional semiconductor laser as LO. We evaluate the required parameters like interpolation technique, electrical signal-to-noise ratio at digital coherence enhancement (DCE) front end, for long haul transmission links having quadrature phase shift keying and 16-quadrature amplitude modulation formats. We show that the method can be implemented using a low-speed DCE front end and a simple digital linear interpolator with small (<;1 dB) implementation penalty even in cases that would otherwise result in error floor.

Place, publisher, year, edition, pages
2015. Vol. 27, no 18, 1942-1945 p.
Keyword [en]
interpolation;light coherence;optical communication equipment;optical elements;optical links;optical modulation;optical noise;phase noise;quadrature amplitude modulation;quadrature phase shift keying;16-quadrature amplitude modulation formats;EEPN mitigation;coherent optical systems;digital coherence enhancement front end;digital linear interpolator;electrical signal-to-noise ratio;equalization-enhanced phase noise;local oscillator phase noise-induced impairment mitigation;long haul transmission links;low-speed digital coherence enhancement;quadrature phase shift keying;semiconductor laser;Bandwidth;Dispersion;Hardware;Interpolation;Optical noise;Phase noise;Coherent receivers;coherent receivers;equalization-enhanced phase noise;laser linewidth;optical communication;quadrature amplitude modulation (QAM)
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Communication Systems
Identifiers
URN: urn:nbn:se:ri:diva-29876DOI: 10.1109/LPT.2015.2447839OAI: oai:DiVA.org:ri-29876DiVA: diva2:1108481
Available from: 2017-06-12 Created: 2017-06-12 Last updated: 2017-06-15Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • Other style
More styles
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  • de-DE
  • en-GB
  • en-US
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