太赫兹无线和有线融合通信技术的研究与展望

随着5G的移动互联及物联网相交织等新型业务的蓬勃发展，对未来通信系统传输容量、传输速度以及误码率等要求愈来愈高。介于毫米波与远红外光之间的太赫兹频段兼有微波和光波的特性，具有低量子能量、大带宽、良好的穿透性。近年来太赫兹通信系统成为研究热点之一，但太赫兹无线通信存在视距传播以及较大路径损耗缺点，太赫兹无线和有线融合传输则兼具两者优点。本文分析了光子太赫兹信号产生、光子太赫兹无线链路传输和光子太赫兹光纤链路传输过程中涉及的器件和技术，重点介绍了太赫兹有线传输的研究现状，并通过基于强度调制直接检测实现1.485 GBaud 350 GHz的1 m太赫兹光纤有线实时传输视频实验，展现了太赫兹有线传输巨大的发展潜力。

Research and prospect of terahertz wireless and wired fusion communication technology

With the rapid development of new services such as 5G mobile Internet and Internet of Things, the transmission capacity, transmission speed and bit error rate of future communication system are required to be higher. Terahertz(THz) band, which is between millimeter wave and far-infrared light, has the advantages of both microwave and light wave like low quantum energy, large bandwidth and good penetration. THz communication system has become one of the research hotspots in recent years. However, terahertz wireless communication has the disadvantages of line of sight propagation and large path loss. It is important to combine wireless link with wired link. This paper analyzes the devices and technologies involved in the process of photonic terahertz signal generation, photonic terahertz wireless link transmission and fiber link transmission, and focuses on the research status of terahertz cable transmission. Finally, the experiment shows the great potential of terahertz wired transmission through real-time transmission of 1 m terahertz fiber with transmission rate of 1.485 GBaud and carrier wave of 350 GHz based on intensity modulation and direct detection.