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<p>Chip-scale all-optical signal broadcasting, which replicates data across multiple wavelength channels via Kerr nonlinearity, is critical for high-throughput optical communication and computing systems. High-quality microcavities boost the inherently weak optical nonlinearity but suffer from Fourier reciprocity, creating a fundamental trade-off that prevents simultaneous generation of the multi-wavelength pump for broadcasting (soliton frequency combs) and massive broadcasting in a single cavity. Here we show that a parity-time symmetric coupled-cavity system featuring equally spaced exceptional points in the frequency domain resolves this limitation. This design integrates comb generation and all-optical broadcasting into a unified process, achieving over 100 usable channels across 200 nm bandwidth with terabit-per-second throughput—three orders of magnitude beyond the intrinsic cavity linewidth limit. We further demonstrate an optical convolutional accelerator, establishing a new non-Hermitian paradigm for chip-scale photonic processing.</p>

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Soliton-assisted massive signal broadcasting via exceptional points

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月31日

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  • Zhuang Fan,
  • Yukun Huang,
  • Wenchan Dong,
  • Haodong Yang,
  • Jiahao Hu,
  • Yizheng Chen,
  • Hanghang Li,
  • Nuo Chen,
  • Heng Zhou,
  • Jing Xu,
  • Xinliang Zhang

摘要

Chip-scale all-optical signal broadcasting, which replicates data across multiple wavelength channels via Kerr nonlinearity, is critical for high-throughput optical communication and computing systems. High-quality microcavities boost the inherently weak optical nonlinearity but suffer from Fourier reciprocity, creating a fundamental trade-off that prevents simultaneous generation of the multi-wavelength pump for broadcasting (soliton frequency combs) and massive broadcasting in a single cavity. Here we show that a parity-time symmetric coupled-cavity system featuring equally spaced exceptional points in the frequency domain resolves this limitation. This design integrates comb generation and all-optical broadcasting into a unified process, achieving over 100 usable channels across 200 nm bandwidth with terabit-per-second throughput—three orders of magnitude beyond the intrinsic cavity linewidth limit. We further demonstrate an optical convolutional accelerator, establishing a new non-Hermitian paradigm for chip-scale photonic processing.