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Opt. Commun. Netw."],"published-print":{"date-parts":[[2022,12,1]]},"abstract":"The recent evolution of passive optical network standards and related research activities for physical layer solutions that achieve bit rates well above 10\u00a0Gbps per wavelength (\n \n\t\u03bb<\/mml:mi>\n <\/mml:math>\n <\/jats:inline-formula>) is discussed. We show that the advancement toward 50, 100, and \n \n\t\n\t \n\t 200<\/mml:mn>\n\t <\/mml:mrow>\n\t<\/mml:mrow>\n\t\n\t\n\t \n\t G<\/mml:mi>\n\t b<\/mml:mi>\n\t p<\/mml:mi>\n\t s<\/mml:mi>\n\t \n\t \/<\/mml:mo>\n\t <\/mml:mrow>\n\t <\/mml:mrow>\n\t<\/mml:mrow>\n\t\u03bb<\/mml:mi>\n <\/mml:math>\n <\/jats:inline-formula> will certainly require a strong introduction of advanced digital signal processing (DSP) technologies for linear, and maybe nonlinear, equalization and for forward error correction. We start by reviewing in detail the current standardization activities in the International Telecommunication Union and the Institute of Electrical and Electronics Engineers, and then we present a comparison of the DSP approaches for traditional direct detection solutions and for future coherent detection approaches.<\/jats:p>","DOI":"10.1364\/jocn.468920","type":"journal-article","created":{"date-parts":[[2022,10,17]],"date-time":"2022-10-17T12:01:23Z","timestamp":1666008083000},"page":"982","update-policy":"http:\/\/dx.doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["Overview of high-speed TDM-PON beyond 50\u2009\u2009Gbps per wavelength using digital signal processing [Invited Tutorial]"],"prefix":"10.1364","volume":"14","author":[{"given":"Pablo","family":"Torres-Ferrera","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/013meh722","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Politecnico di Torino"}]},{"given":"Frank","family":"Effenberger","sequence":"additional","affiliation":[{"name":"Futurewei Technologies, Inc."}]},{"ORCID":"http:\/\/orcid.org\/0000-0002-6045-6291","authenticated-orcid":true,"given":"Md Saifuddin","family":"Faruk","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/013meh722","id-type":"ROR","asserted-by":"publisher"}]}]},{"ORCID":"http:\/\/orcid.org\/0000-0002-6803-718X","authenticated-orcid":true,"given":"Seb J.","family":"Savory","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/013meh722","id-type":"ROR","asserted-by":"publisher"}]}]},{"ORCID":"http:\/\/orcid.org\/0000-0003-1909-4281","authenticated-orcid":true,"given":"Roberto","family":"Gaudino","sequence":"additional","affiliation":[{"name":"Politecnico di Torino"}]}],"member":"285","published-online":{"date-parts":[[2022,11,11]]},"reference":[{"key":"jocn-14-12-982-R2","doi-asserted-by":"publisher","first-page":"118","DOI":"10.1109\/35.968822","volume":"39","author":"Effenberger","year":"2001","journal-title":"IEEE Commun. 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