Constellation-Shaped 64QAM Robust against Phase Noise in Intra-Datacenter Networks

Abstract

We evaluate phase-noise tolerance of high-order modulation/demodulation methods assuming their use in intra-datacenter networks. Simulations show that 32-Gbaud constellation-shaped 64QAM signals with optimized symbol decision can be transmitted using low-cost lasers with 10-MHz linewidth. © 2022 The Authors