一种新型的单光源双工通信系统

A Novel Technique for Duplex Communication System with a Signal-Light Source

摘要:

以单光源为基础光源,使用内调制与外调制相结合的调制方式,成功搭建了双工激光通信系统,并对其进行了理论分析与实验验证.光源部分作为中心基站(Central Station,CS),使用内调制实现下行链路,向基站(Base Station,BS)发送请求信息;BS端则使用声光外调制的方式实现上行反馈,向CS端发送反馈信息,实现了两个终端之间的相互通信.结果表明,该双工通信系统室内传输稳定,传输速率因器件而定,下行最高可达30kb/s,上行最高可达3Mb/s,该通信系统可实现时分双工光通信,在相邻时段使用不同频率的光载波进行实时通信.

Abstract:

In order to realize the laser duplex communication,a duplex communication platform was established by using single light as the basic light,which combines the internal modulation with the external modulation.Theoretical analysis and experimental verifications were performed.Using the internal modulation as the downlink to send message to the Base Station (BS),and using the acousto-optic modulator as the uplink to send feedback signal to the Central Station (CS),thus the communication between the two terminals was realized.The experimental results show that the duplex communication system works stablely indoor,and the transmission rate depends on the devices.The communication system can realize time-division duplex communication, the downlink transmission rate and the uplink rate can reach about 30kb/s and 3Mb/s,respectively.