Open AccessTechnologies for future wavelength division multiplexing passive optical networks
Author(s) -
El-Nahal Fady,
Hanik Norbert
Publication year - 2020
Publication title -
iet optoelectronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.379
H-Index - 42
eISSN - 1751-8776
pISSN - 1751-8768
DOI - 10.1049/iet-opt.2018.5056
Subject(s) - passive optical network , wavelength division multiplexing , telecommunications link , keying , transmitter , electronic engineering , computer science , amplitude shift keying , multiplexing , computer network , modulation (music) , optical line termination , time division multiplexing , telecommunications , phase shift keying , wavelength , engineering , physics , optics , bit error rate , channel (broadcasting) , acoustics
This study reviews key technologies of next generation wavelength division multiplexing passive optical networks (WDM‐PONs). The authors have studied WDM‐PONs with centralised lightwave source and direct detection, where a wavelength‐reuse system is employed to transmit the uplink data by using a colourless transmitter at the optical network unit (ONU). WDM‐PON system was demonstrated using a Fabry–Perot laser diode as a colourless transmitter at the ONU for differential phase‐shift keying (DPSK) downlink signals and on–off keying uplink signals. The constant‐amplitude feature of the DPSK modulation could retain a great extinction ratio of the downlink signal and decrease the noise to the uplink signal. The proposed scheme offers a promising solution for future PONs.