Burst-mode partial response compensating techniques for next-generation optical access networks

01 October 2015 → 01 May 2019
Regional and community funding: Special Research Fund
Research disciplines
  • Natural sciences
    • Photonics, optoelectronics and optical communications
  • Engineering and technology
    • Optical fibre communications
    • Analogue, RF and mixed signal integrated circuits
equalization burst-mode long-reach PON partial response passive optical network (PON)
Project description

Passive optical networks (PONs) are one of most massively deployed optical access systems because of low cost and high-bandwidth provision. In PON systems, multiple optical network units (ONUs) at the customer sides share the fiber plant and an optical line terminal (OLT) located at the central office. In order to economically support future bandwidth growth, the simplification of today’s telecom networks requires an architecture to combine metro and access networks. As a result, the metro network is getting absorbed in access and the traditional access service node is moving close to the backbone nodes.

While metro/access convergence significantly reduces operational expenditure (OpEx) by consolidating the network elements, it introduces novel challenges for the physical layer component technology, esp. the head-end receivers at the OLT. While the power and phase variation can be adapted from burst to burst, the ability to recover bursts with a wide range of distortion/dispersion is not yet available in today's PON receivers. Therefore, a fundamental research towards a more comprehensive knowledge or understanding of upstream impairment mitigation for next-generation optical access is necessary.