Abstract
This Letter demonstrates a high-speed fiber–terahertz–fiber system in the 355-GHz band using stable optical frequency comb generation and a photonics-enabled receiver. At the transmitter, a single dual-drive Mach–Zehnder modulator is employed to generate a frequency comb by driving the modulator under an optimal condition. At the antenna site, a photonics-enabled receiver consisting of an optical local oscillator signal generator, a frequency doubler, and an electronic mixer is used to downconvert the terahertz-wave signal to the microwave band. Simple intensity modulation and a direct detection method are used for transmitting the downconverted signal to the receiver over the second fiber link. To demonstrate the proof of concept, we transmitted a 16-quadrature amplitude modulation (QAM) orthogonal frequency-division multiplexing signal over a system consisting of two radio-over-fiber links and a 4 m wireless link in the 355-GHz band and achieved a line rate of 60 Gb/s. We also successfully transmitted a 16-QAM subcarrier multiplexing single-carrier signal over the system and achieved a capacity of 50 Gb/s. The proposed system can facilitate the deployment of ultra-dense small cells in high-frequency bands in beyond-5G networks.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Pham Tien Dat, Toshimasa Umezawa, Atsushi Kanno, Naokatsu Yamamoto, and Tetsuya Kawanishi
Opt. Lett. 47(5) 1149-1152 (2022)
Hengxin Yan, Xinying Li, Xiaolong Pan, Tangyao Xie, Liye Fang, Jiahao Bi, Han Jiang, and Xiangjun Xin
Opt. Lett. 49(8) 1919-1922 (2024)
Xiaolong Pan, Di Wu, Xinying Li, Dong Guo, Zhipei Li, Hengxin Yan, Chenchen Wang, Jiahao Bi, Chao Yu, Xinyu Liu, Xiangjun Xin, Qi Zhang, Ran Gao, and Ze Dong
Opt. Lett. 48(8) 2146-2149 (2023)