Nature Communications (Apr 2024)

Parallel wavelength-division-multiplexed signal transmission and dispersion compensation enabled by soliton microcombs and microrings

  • Yuanbin Liu,
  • Hongyi Zhang,
  • Jiacheng Liu,
  • Liangjun Lu,
  • Jiangbing Du,
  • Yu Li,
  • Zuyuan He,
  • Jianping Chen,
  • Linjie Zhou,
  • Andrew W. Poon

DOI
https://doi.org/10.1038/s41467-024-47904-2
Journal volume & issue
Vol. 15, no. 1
pp. 1 – 12

Abstract

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Abstract The proliferation of computation-intensive technologies has led to a significant rise in the number of datacenters, posing challenges for high-speed and power-efficient datacenter interconnects (DCIs). Although inter-DCIs based on intensity modulation and direct detection (IM-DD) along with wavelength-division multiplexing technologies exhibit power-efficient and large-capacity properties, the requirement of multiple laser sources leads to high costs and limited scalability, and the chromatic dispersion (CD) restricts the transmission length of optical signals. Here we propose a scalable on-chip parallel IM-DD data transmission system enabled by a single-soliton Kerr microcomb and a reconfigurable microring resonator-based CD compensator. We experimentally demonstrate an aggregate line rate of 1.68 Tbit/s over a 20-km-long SMF. The extrapolated energy consumption for CD compensation of 40-km-SMFs is ~0.3 pJ/bit, which is calculated as being around 6 times less than that of the commercial 400G-ZR coherent transceivers. Our approach holds significant promise for achieving data rates exceeding 10 terabits.