Evaluating DSP algorithms, system architecture, and faster‑than‑Nyquist transmission for 3.2-Tb/s data center interconnects

Next-Generation Optical Communication: Components, Sub-Systems, and Systems 2026

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Authors: Charles St-Arnault, David V. Plant
DOI: 10.1117/12.3083302
Cited by: 0
References: 5

Abstract

We present two experimental results for 3.2 Tbps using 8×448 Gbps PAM4 enabled by a 3 nm SerDes, TFLN modulators and advanced DSP using 8-WDM and DR8 schemes. We investigate the performance of FFE, DFE, THP and MLSE for the future generation of DCI. Finally, we introduce a method to scale symbol rates without improving DAC performance. Using a faster-than-Nyquist signal, we drive a 225 GSa/s DAC to operate at 320 Gbaud with PAM4, achieving significantly higher spectral efficiency than 224 Gbaud PAM4 systems.

Fields of Study & Subjects

Optical Network Technologies Semiconductor Lasers and Optical Devices Advanced Photonic Communication Systems

Publication details

Journal / source
Next-Generation Optical Communication: Components, Sub-Systems, and Systems
Pages
16–16
Publication date
4 March 2026
Language
EN