60-Gbit/s THz communication hybrid propagation through hollow-core fiber and over the air

Smith, Jessica F., Beresna, Martynas, Fatadin, Irshaad, Talataisong, Wanvisa, Brambilla, Gilberto, Phanchat, Natthawat, Ferguson, Robert and Naftaly, Mira (2025) 60-Gbit/s THz communication hybrid propagation through hollow-core fiber and over the air. IEEE Transactions on Terahertz Science and Technology, 15 (6), 1033-1040. (doi:10.1109/TTHZ.2025.3610193).

Abstract

Terahertz (THz) frequencies have become a promising candidate for sixth-generation communications technology due to the large continuous bandwidths available allowing for a large increase in a peak data rate, compared to frequencies currently utilized in fifth generation. As THz over-the-air (OTA) signals are blocked by environmental obstacles such as building walls, short lengths (<5 m) of fiber capable of carrying THz data signals would allow for through-the-wall high-speed communication. In this work, a demonstration of data transmission through a 17-cm bent TOPAS hollow-core antiresonant fiber is presented. A maximum data rate of 60 Gbit/s, using a QAM 64 modulation format, is achieved with a bit error ratio of 2.4 × 10−2, which is below the soft-decision forward error correction threshold of 2.7 × 10−2. This was achieved by transmitting the signal first through the THz fiber and then OTA over a ∼1.7-m non-line-of-sight beam path. To the best of our knowledge, this is the first published demonstration of a hybrid fiber-to-OTA beam path at 250 GHz.

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Contributors

Author: Gilberto Brambilla

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