基于太赫兹量子级联激光器的无线信号传输的实现

摘要

A terahertz wireless transmission system is constructed by using a continuous wave terahertz quantum-cascade laser （rl＇Hz ~I.2L） and a spectrally-matched terahertz quantum-well photodetector （THz QWP）. The transmission bandwidth of the system is measured. The transmission processes at 4.13 THz of a picture file are demonstrated by employing the above system, and the both message totally consistent with the original one are received correctly. Hence, the feasibility of wireless transmission based on THz QCL and THz QWP devices is confirmed. Finally, we analyze the transmission rate of the demonstrating system and give the improving methods.%文章采用连续波激射的太赫兹量子级联激光器（THz QCL）为发射端、光谱匹配的THz量子阱探测器（THzQWP）为接收端,搭建了基于THz波的无线传输演示系统.测量并分析了该演示系统的传输带宽.采用搭建的无线传输系统演示了基于4.13 THz电磁波的图片文件的无线传输过程,得到了与源文件一致的结果,验证了采用THzQCL和THz QWP进行THz信号无线传输的可行性.最后,分析了演示系统的传输速率,给出了提高系统传输速率的方法.