Optoelectronic signal processing for chromatic dispersion mitigation in direct detection systems

Stenio Magalhães Ranzini (Invited author), Francesco Da Ros (Invited author), Henning Bülow (Invited author), Darko Zibar (Invited author)

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

29 Downloads (Pure)

Abstract

An optical pre-processing structure is used to reduce the burden of digital equalizers and increase transmission reach for a direct detected system impaired by chromatic dispersion. The optical pre-processing consists of the optical signal being sliced into narrow frequency sub-band by an optical filter. Two distinct filters are numerically investigated: an arbitrary waveguide grating (AWG) filter and a series of cascaded Mach-Zehnder delay interferometers (MZDI). Each signal’s spectral slice is detected by a photodetector and used as input for the digital equalizer. Two options are also considered for equalization: a feedforward neural network (NN) equalizer and a recurrent neural network with reservoir computing (RC). The results are analyzed in simulation in terms of signalto-noise penalty at the KP4 forward error correction threshold. The penalty is calculated with respect to a back-toback transmission without equalization. A 32 GBd on-off transmission shows 0 dB penalty at ≈25 km transmission reach with optoelectronic processing with FNN and at ≈40 km with RC.
Original languageEnglish
Title of host publicationProceedings of 22nd International Conference on Transparent Optical Networks (ICTON)
Number of pages2
PublisherIEEE
Publication date2020
ISBN (Print)978-1-7281-8423-4
Publication statusPublished - 2020
Event22nd International Conference on Transparent Optical Networks - Virtual event, Bari, Italy
Duration: 19 Jul 202023 Jul 2020
Conference number: 22
https://icton2020.fbk.eu/
https://icton2020.fbk.eu/home

Conference

Conference22nd International Conference on Transparent Optical Networks
Number22
LocationVirtual event
CountryItaly
CityBari
Period19/07/202023/07/2020
SponsorEuropean Optical Society (EOS) Italian Branch, Societa Italiana di Ottica e Fotonica (SIOF)
Internet address

Keywords

  • Reservoir computing
  • Signal equalization
  • Chromatic dispersion mitigation
  • Short-reach transmission
  • Direct-detection

Fingerprint Dive into the research topics of 'Optoelectronic signal processing for chromatic dispersion mitigation in direct detection systems'. Together they form a unique fingerprint.

Cite this