A Unified System With Integrated Generation of High-Speed Communication and High-Resolution Sensing Signals Based on THz Photonics

作者：Jia, Shi^*; Wang, Shiwei; Liu, Kexin; Pang, Xiaodan; Zhang, Hangkai; Jin, Xiaofeng; Zheng, Shilie; Chi, Hao; Zhang, Xianmin; Yu, Xianbin^*

来源：Journal of Lightwave Technology, 2018, 36(19): 4549-4556.

DOI：10.1109/JLT.2018.2863684

• Frequency-to-time mapping
• linear frequency modulation
• THz photonics
• THz communication

Multifunctional convergence is one of the key physical features in future generation networks and Internet of things architectures. In this paper, we propose and experimentally demonstrate a unified terahertz (THz) system operating in the 300 GHz band, with a potential of simultaneously enabling high-speed communication and high-resolution ranging over a common optical infrastructure. Both THz communication and THz sensing signals are generated based on THz photonics and cutting-edge terahertz transceiver technologies. In the experiment, 16-quadrature amplitude modulation modulated THz signal is generated by photomixing two free running lasers for the communication, and linear frequency modulated (LFM) THz pulses are generated based on optical interferometer-based frequency-to-time mapping (FTM) for sensing. The experimental results show that up to 56 Gbit/s net rate is successfully transmitted over a 2 m free-space line-of-sight link, and the THz LFM pulses with a time-bandwidth product of up to 207 are successfully generated, which is potentially able to enable a cm-scale range resolution. We also investigate the frequency multiplexing schemes for two signals by changing the channel gap at the transmitter side. To the best of our knowledge, such a system represents the first demonstration of integrated generation system in the THz region above 300 GHz, which has great potential in prospective applications of future converged networks.

• 出版日期2018-10-1
• 单位浙江大学