光电融合智能太赫兹的体系架构和关键技术

Architecture and key technologies of photonic-electronic converged intelligent terahertz systems

与广泛应用的以微波为代表的无线系统和以光纤为代表的有线系统相比,太赫兹除了其特殊的频谱特性外,人们期待太赫兹频段用于无线系统能突破微波系统的带宽限制,实现可与光纤系统相媲美的大带宽,并具有无线系统的灵活性和智能化。但如何实现宽带、智能以及具有较远作用距离的太赫兹系统,面临极大的挑战性。本文介绍了光电融合智能太赫兹的体系架构,重点讨论了基于光电融合的太赫兹源、接收检测、阵列天线以及太赫兹光电混频器等关键技术的国内外研究进展与进一步发展方向,以期解决单纯的电子学方式或光子学方式存在的难以克服的瓶颈限制。

Compared with the widely used wireless system represented by microwave and wired system represented by optical fiber,terahertz band is expected to break through the bandwidth limit of microwave system in addition to its special spectral characteristics,thereby achieving a large bandwidth comparable to the optical fiber system but possessing the flexibility and intelligence of wireless system.However,it is still a great challenge to achieve broadband,intelligent and long range terahertz systems.The architecture of photonic-electronic converged intelligent terahertz systems is introduced firstly,and then the research progress and further development direction of key technologies such as terahertz source,receiver,channel monitor,array antenna and terahertz photomixer based on photonic-electronic convergence are reviewed and discussed.Here a new approach based on photonic-electronic convergence is discussed in order to solve the bottleneck of a single electronic or photonic approach.