Progress of Very High Speed PON in ITU-T [Invited]

Very high speed PON is the PON generation in the ITU-T that is coming after 50G-PON. It is currently in the exploratory study phase in ITU, with network operators sharing their views on potential requirements and the Q2/SG15 group proposing and evaluating technology candidates to meet these requirements. This paper reviews the progress so far in identifying the key requirements, technical candidates, physical layer transmission performance, and the related technology maturity. The paper discusses the technology candidate evaluation process underway as part of this pre-standardization, research phase of very high speed PON among the relevant standards experts within FSAN and ITU-T SG15/Q2.