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<p>High frequency microwave, spanning up to terahertz frequency, is pivotal for next-generation communication, sensing and radar. However, it faces fundamental noise limitations when frequency is pushed towards such boundary of conventional electronic technologies. Photonic microwave generation, particularly Kerr-comb-based microwave source, benefits from high frequency operation but still suffers from phase noise constraints. Here we overcome this drawback by developing a compact, electrically-driven Kerr comb system that achieves near quantum-limited phase noise for microwave synthesis up to 384 GHz. Leveraging high-Q fiber Fabry-Perot resonators and optimized noise modeling under limited pump power, we demonstrate ultra-low phase noise performances of −133 dBc/Hz (10.1 GHz) and −95 dBc/Hz (300 GHz) at 10 kHz offset, approaching quantum noise limits. This breakthrough enables 64QAM modulation in terahertz wireless communication and record 240 Gbps data rate without need for carrier phase estimation. Our device can serve as a key building block for the future information technology.</p>

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Low-noise frequency synthesis and terahertz wireless communication driven by compact turnkey Kerr combs

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月7日

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  • Kunpeng Jia,
  • Yuancheng Cai,
  • Xinwei Yi,
  • Chenye Qin,
  • Zexing Zhao,
  • Xiaohan Wang,
  • Yunfeng Liu,
  • Xiaofan Zhang,
  • Shanshan Cheng,
  • Xiaoshun Jiang,
  • Chong Sheng,
  • Yongming Huang,
  • Jianjun Yu,
  • Hui Liu,
  • Biaobing Jin,
  • Xiaohu You,
  • Shi-ning Zhu,
  • Wei Liang,
  • Min Zhu,
  • Zhenda Xie

摘要

High frequency microwave, spanning up to terahertz frequency, is pivotal for next-generation communication, sensing and radar. However, it faces fundamental noise limitations when frequency is pushed towards such boundary of conventional electronic technologies. Photonic microwave generation, particularly Kerr-comb-based microwave source, benefits from high frequency operation but still suffers from phase noise constraints. Here we overcome this drawback by developing a compact, electrically-driven Kerr comb system that achieves near quantum-limited phase noise for microwave synthesis up to 384 GHz. Leveraging high-Q fiber Fabry-Perot resonators and optimized noise modeling under limited pump power, we demonstrate ultra-low phase noise performances of −133 dBc/Hz (10.1 GHz) and −95 dBc/Hz (300 GHz) at 10 kHz offset, approaching quantum noise limits. This breakthrough enables 64QAM modulation in terahertz wireless communication and record 240 Gbps data rate without need for carrier phase estimation. Our device can serve as a key building block for the future information technology.