Receiver implemented RF pilot tone phase noise mitigation in coherent optical nPSK and nQAM systems
2011 (English)In: Optics Express, ISSN 1094-4087, Vol. 19, no 15, 14487-14494 p.Article in journal (Refereed) Published
In this paper, a novel method for extracting an RF pilot carrier signal in the coherent receiver is presented. The RF carrier is used to mitigate the phase noise influence in n-level PSK and QAM systems. The performance is compared to the use of an (ideal) optically transmitted RF pilot tone. As expected an electronically generated RF carrier provides less efficient phase noise mitigation than the optical RF. However, the electronically generated RF carrier still improves the phase noise tolerance by about one order of magnitude in bit error rate (BER) compared to using no RF pilot tone. It is also found, as a novel study result, that equalization enhanced phase noise - which appears as correlated pure phase noise, amplitude noise and time jitter - cannot be efficiently mitigated by the use of an (optically or electrically generated) RF pilot tone.
Place, publisher, year, edition, pages
2011. Vol. 19, no 15, 14487-14494 p.
DISPERSION COMPENSATION, TRANSMISSION-SYSTEM, DIGITAL-FILTERS, EQUALIZATION
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-37263DOI: 10.1364/OE.19.014487ISI: 000292877600080ScopusID: 2-s2.0-79960520226OAI: oai:DiVA.org:kth-37263DiVA: diva2:433533
FunderICT - The Next Generation
QC 201108102011-08-102011-08-082012-05-28Bibliographically approved