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Mitigation of EEPN in Coherent Optical Systems with Low Speed Digital Coherence Enhancement
RISE, Swedish ICT, Acreo.ORCID iD: 0000-0001-8389-158x
RISE, Swedish ICT, Acreo.ORCID iD: 0000-0001-5730-9656
KTH Royal Institute of Technology, Sweden.
RISE, Swedish ICT, Acreo.
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2015 (English)In: IEEE Photonics Technology Letters, ISSN 1041-1135, E-ISSN 1941-0174, Vol. 27, no 18, p. 1942-1945, article id 7128718Article 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 inerror floor.

Place, publisher, year, edition, pages
2015. Vol. 27, no 18, p. 1942-1945, article id 7128718
Keywords [en]
coherent receiver, sequalization-enhanced phase noise, quadrature amplitude modulation (QAM)
National Category
Computer and Information Sciences
Identifiers
URN: urn:nbn:se:ri:diva-31901DOI: 10.1109/LPT.2015.2447839OAI: oai:DiVA.org:ri-31901DiVA, id: diva2:1151759
Available from: 2017-10-24 Created: 2017-10-24 Last updated: 2019-07-05Bibliographically approved

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Kakkar, AdityaNavarro, Jaime RodrigoOzolins, Oskars

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