Simplified coherent optical network units for very-high-speed passive optical networks

Research output: Contribution to journalArticlepeer-review

Electronic versions

Documents

  • JOCN_Invited_2024_revision-5

    Accepted author manuscript, 675 KB, PDF document

    Embargo ends: 13/02/25

  • jocn-16-7-c1

    Final published version, 5.66 MB, PDF document

Future passive optical networks (PONs) for 200Gb/s/𝜆
, and beyond, pose a significant technological challenge. The use of coherent technology in access networks provides a great solution based on concepts from mature technologies to achieve the speeds needed for very-high-speed PON (VHSP). In this paper, we provide an overview of the currently demonstrated technologies and propose a possible simplified optical network unit (ONU) for time division multiplex PON (TDM-PON). The proposed ONU uses a single polarization heterodyne receiver, using either a balanced photodiode or a single-ended one and an electro-absorption modulated laser (EML)-based transmitter. The experimental demonstration using the proposed ONU in a bidirectional, symmetrical transmission over fiber distances of 20 km and 40 km shows the viability of the technology. The downstream direction achieves a power budget of 34.3/29.3 dB for 20 km and 33.9/29 dB for 40 km, for a balanced/single-ended receiver, whereas the upstream transmission achieves 29.3 dB for both scenarios
Original languageEnglish
JournalIEEE Journal of Optical Communications and Networking
Volume16
Issue number7
Early online date19 Mar 2024
Publication statusPublished - 1 Jul 2024
View graph of relations