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<p>Terahertz (THz) bands are critical for next-generation wireless fronthaul/backhaul applications. However, they face a fundamental coverage range limitation due to low emission power, severe path loss, and poor receiving sensitivity, especially in photonics-assisted THz systems beyond 300 GHz. To address this limitation, we develop a 335 GHz continuous-wave traveling wave tube amplifier with an output power close to 4 W and a gain of over 50 dB, and construct a novel yet simple diversity receiving scheme to improve the receiving signal-to-noise ratio by ~3 dB. Through hybrid photonic–electronic synergy, combining photonics-assisted THz generation, high-power THz amplification, and spatial diversity reception, a record-breaking kilometer-scale THz wireless communication at 335 GHz—a highly challenging atmospheric window—is demonstrated. We first achieve a net rate of 27.84 Gbit s<sup>−1</sup> over a 2.2 km wireless link—yielding an unprecedented rate–distance product of 61,248 Gbit s<sup>−1</sup> ∙ m—beyond 300 GHz to the best of our knowledge.</p><p></p>

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Surpassing kilometer-scale terahertz wireless communication beyond 300 GHz enabled by hybrid photonic–electronic synergy

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月9日

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  • Yuancheng Cai,
  • Lin Zhang,
  • Jiao Zhang,
  • Bingchang Hua,
  • Kexin Ma,
  • Junjie Ding,
  • Xingwang Bian,
  • Mingzheng Lei,
  • Yingzhou Liu,
  • Jiankang Li,
  • Zhigang Xin,
  • Xingyu Chen,
  • Jun Cai,
  • Pan Pan,
  • Yongming Huang,
  • Jinjun Feng,
  • Min Zhu,
  • Xiaohu You

摘要

Terahertz (THz) bands are critical for next-generation wireless fronthaul/backhaul applications. However, they face a fundamental coverage range limitation due to low emission power, severe path loss, and poor receiving sensitivity, especially in photonics-assisted THz systems beyond 300 GHz. To address this limitation, we develop a 335 GHz continuous-wave traveling wave tube amplifier with an output power close to 4 W and a gain of over 50 dB, and construct a novel yet simple diversity receiving scheme to improve the receiving signal-to-noise ratio by ~3 dB. Through hybrid photonic–electronic synergy, combining photonics-assisted THz generation, high-power THz amplification, and spatial diversity reception, a record-breaking kilometer-scale THz wireless communication at 335 GHz—a highly challenging atmospheric window—is demonstrated. We first achieve a net rate of 27.84 Gbit s−1 over a 2.2 km wireless link—yielding an unprecedented rate–distance product of 61,248 Gbit s−1 ∙ m—beyond 300 GHz to the best of our knowledge.