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dc.contributor.authorErkilinc, MS
dc.contributor.authorLavery, D
dc.contributor.authorShi, K
dc.contributor.authorThomsen, BC
dc.contributor.authorKilley, RI
dc.contributor.authorSavory, Seb
dc.contributor.authorBayvel, P
dc.date.accessioned2018-12-10T15:36:55Z
dc.date.available2018-12-10T15:36:55Z
dc.date.issued2018-08-15
dc.identifier.issn0733-8724
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/286592
dc.description.abstractIt is predicted that demand in future optical access networks will reach multigigabit/s per user. However, the limited performance of the direct detection receiver technology currently used in the optical network units at the customers' premises restricts data rates per user. Therefore, the concept of coherent-enabled access networks has attracted attention in recent years, as this technology offers high receiver sensitivity, inherent frequency selectivity, and linear field detection enabling the full compensation of linear channel impairments. However, the complexity of conventional (dual-polarization digital) coherent receivers has so far prevented their introduction into access networks. Thus, to exploit the benefits of coherent technology in access networks, low complexity coherent receivers, suitable for implementation in ONUs, are needed. In this paper, the recently proposed low complexity coherent (i.e., polarization-independent Alamouti-coding heterodyne) receiver is, for the first time, compared in terms of its minimum receiver sensitivity with five previously reported receiver designs, including a detailed discussion on their advantages and limitations. It is shown that, of all the configurations considered, the Alamouti-coding based receiver approach allows the lowest number of photons per bit (PPB) transmitted (with a lower bound of 15.5 PPB in an ideal implementation of the system), while requiring the lowest optical receiver hardware complexity (in terms of the optical component count). It also exhibits comparable complexity to the currently deployed direct-detection receivers, which typically require over 1000 PPB. Finally, a comparison of experimentally achieved receiver sensitivities and transmission distances using these receivers is presented. The highest spectral efficiency and longest transmission distance at the highest bit rate (10 Gb/s) was reported using the Alamouti-coding receiver, which is also the only one, to date, to have been demonstrated in a full system bidirectional transmission.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleComparison of low complexity coherent receivers for UDWDM-PONs (λ-to-the-User)
dc.typeArticle
prism.endingPage3464
prism.issueIdentifier16
prism.publicationDate2018
prism.publicationNameJournal of Lightwave Technology
prism.startingPage3453
prism.volume36
dc.identifier.doi10.17863/CAM.33905
dcterms.dateAccepted2018-03-19
rioxxterms.versionofrecord10.1109/JLT.2018.2835376
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
rioxxterms.licenseref.startdate2018-08-15
dc.contributor.orcidSavory, Seb [0000-0002-6803-718X]
dc.identifier.eissn1558-2213
dc.publisher.urlhttps://ieeexplore.ieee.org/document/8357460
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/J017582/1)
cam.issuedOnline2018-05-10
dc.identifier.urlhttps://ieeexplore.ieee.org/document/8357460


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International