Transmission of Millimeter-wave Radio Signal over a Seamless Fiber–Terahertz System at 325 GHz

We demonstrate the transmission of a millimeter-wave radio signal over a seamless fiber–terahertz-wave system in the 300 GHz band. The system utilizes a simple optical heterodyning method at the transmitter and a direct detection at the receiver. As a proof-of-concept demonstration, we successfully transmitted a 100-MHz bandwidth 5G new radio compliant signal at 24.5 GHz over a seamless fiber-terahertz system in the 300 GHz band. The proposed system is promising to facilitate the deployment of ultra-dense small cells in high-frequency bands in 5G and beyond networks.