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为了弥补传统逆向调制技术只能实现单向通信的应用局限,文章提出了全双工逆向调制无线激光通信。分析了激光功率和调制形式对逆向调制系统的影响,借助仿真软件建模,搭建了双向相位/强度调制的正交逆向调制通信系统,分析了系统的眼图和波形。借助双根压电陶瓷设计了基于猫眼效应的反射角度改变的逆向调制器。在基于铌酸锂相位调制器的高速数据传输系统上,搭建了基于压电陶瓷的逆向强度调制通信系统,利用误码仪和示波器验证了系统的可行性。
In order to make up for the limitation of the traditional reverse modulation technology that only one-way communication can be realized, a full-duplex reverse modulated wireless laser communication is proposed. The influence of laser power and modulation form on the reverse modulation system is analyzed. With the aid of simulation software modeling, an orthogonal inverse modulation communication system with bi-directional phase / intensity modulation is built, and the eye diagram and the waveform of the system are analyzed. A double-root piezoceramic retroreflector based on the cat’s eye effect with varying reflection angle was designed. Based on the high-speed data transmission system based on lithium niobate phase modulator, a piezoelectric ceramic-based reverse-intensity modulation communication system was set up. The feasibility of the system was verified by using a bit error coder and an oscilloscope.