Coherent technology is considered a future-proof solution for future-generation PON thanks to its high spectral efficiency and superior receiver sensitivity, which enables higher capacity, extended reach, and larger splitting ratio in PON applications. Several coherent PON technologies have been studied and developed, including coherent time-division-multiplexing (TDM) PON, coherent wavelength-division-multiplexing (WDM)-PON, and coherent time-and-frequency-division multiplexing (TFDM)-PON.
A question commonly raised among network operators and equipment vendors is that for future coherent PON, will it adopt single-carrier solutions, which use only TDM bandwidth sharing, or will it utilize multi-carrier configurations, either wavelength or frequency division multiplexed (WDM/FDM)?
Although TDM-PON offers a practical and relatively simple solution, it may need a new scheduling algorithm for latency reduction in a big covering group. On the other hand, multi-carrier PON can provide a more flexible bandwidth allocation, but they will introduce additional cost and operational complexity.
This workshop will bring together experts from academia, industry, and standardization bodies to discuss the benefits, challenges, technical feasibility, and economics of adopting single-carrier versus multi-carrier solutions in the next-generation coherent PON.
Dario Pilori, Politecnico di Torino, Italy
Ashkan Seyedi, NVIDIA Corp., United States
Lilin Yi, Shanghai Jiao Tong University, China
Haipeng Zhang, CableLabs, United States
Jim Zou, ADVA, Germany