水下激光通信发射单元设计

Design of underwater laser communication emitter unit

针对目前水下远距离通信迫切需要数据率更高、隐蔽性更好的通信系统的情况,进行水下激光通信发射单元的设计,首先对上位机中要传输的图片进行编码,通过USB转串口的方法发送数据,然后通过调制电路以OOK调制方式使激光器发光,其中着重对调制电路进行了设计并制作了相应的PCB板。最后通过加入食盐并用真空泵扰动来模拟了不同混浊程度海水环境,观察和分析了不同浑浊程度海水中接收波形。经过验证,该水下激光通信发射单元性能良好,完全可以实现水下激光通信的信息发送功能。

In view of the urgent need of a higher data rate and better concealment for underwater remote communication and design the underwater laser communication emitter unit, firstly encodes the pictures to be transmitted in the host computer. The data is transmitted by USB to serial port, and then the laser is illuminated by OOK modulation circuit. The modulation circuit is designed and the corresponding PCB board is made. Finally, The received waveforms in seawater with different turbidity degrees were observed and analyzed. It is proved that the underwater laser communication emitter unit has good performance and can realize the information transmission function of underwater laser communication.