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Impact of local oscillator frequency noise on coherent optical systems with electronic dispersion compensation
RISE., Swedish ICT, Acreo. KTH Royal Institute of Technology, Sweden.ORCID-id: 0000-0001-8389-158X
KTH Royal Institute of Technology, Sweden.
RISE., Swedish ICT, Acreo.ORCID-id: 0000-0003-4906-1704
RISE., Swedish ICT, Acreo.ORCID-id: 0000-0001-5730-9656
Vise andre og tillknytning
2015 (engelsk)Inngår i: Optics Express, E-ISSN 1094-4087, Vol. 23, nr 9, s. 11221-11226Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A theoretical investigation of the equalization-enhanced phase noise (EEPN) and its mitigation is presented. We show with a frequency domain analysis that the EEPN results from the non-linear inter-mixing between the sidebands of the dispersed signal and the noise sidebands of the local oscillator. It is further shown and validated with system simulations that the transmission penalty is mainly due to the slow optical frequency fluctuations of the local oscillator. Hence, elimination of the frequency noise below a certain cut-off frequency significantly reduces the transmission penalty, even when frequency noise would otherwise cause an error floor. The required cut-off frequency increases linearly with the white frequency noise level and hence the linewidth of the local oscillator laser, but is virtually independent of the symbol rate and the accumulated dispersion.

sted, utgiver, år, opplag, sider
2015. Vol. 23, nr 9, s. 11221-11226
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URN: urn:nbn:se:ri:diva-31910DOI: 10.1364/OE.23.011221Scopus ID: 2-s2.0-84940401758OAI: oai:DiVA.org:ri-31910DiVA, id: diva2:1151768
Tilgjengelig fra: 2017-10-24 Laget: 2017-10-24 Sist oppdatert: 2024-03-05bibliografisk kontrollert

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Kakkar, AdityaPang, XiaodanNavarro, Jaime RodrigoOzolins, Oskars

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