双光源水下无线光通信系统的研究与实现

随着海洋探测研究的不断深入，水下无线通信技术已成为制约其发展的关键。针对水下高速、远距离无线通信的需求，设计了一种面向海洋商用的水下双向链路通信系统。系统在发射端采用激光LD及LED双发射源，提出了双发射光源的系统设计方案，并通过设计相应的驱动电路验证了方案的可行性；在接收端利用5 mm大面积APD及高灵敏度PMT双接收探测器接收光信号，适用于远距离、高速通信；系统的信息处理部分由FPGA完成，通过网络通讯方式与PC端进行信息交互；最后完成整个系统设计并进行了商用工程化。开展的水下模拟实验表明，系统在通信距离5 m、误码率10?7时，通信速率可达60 Mbps；在远距离通信60 m、误码率10?7时，通信速率达10 Mbps。

Research and design of underwater wireless optical communication system with dual light sources

With the deepening exploration of ocean, underwater wireless communication technology has become the key to restrict its development. Aiming at the requirement of high speed and long distance underwater wireless communication, an underwater bidirectional link communication system for marine commercial was designed. The laser LD and LED dual emission light sources were adopted at the transmitting end, the system design scheme of dual emission light sources was proposed, and the feasibility of the scheme by designing the corresponding drive circuits was verified. At the receiving end, 5 mm large-area APD and high-sensitivity PMT dual receiving detector were used to receive optical signals, which were suitable for long-distance and high-speed communication. The information processing part of the system was completed by FPGA, and information interaction was carried out with PC through network communication. Finally, the whole system was designed and commercialized. The underwater simulation experiment shows that the communication rate of the system can reach 60 Mbps when the communication distance is 5 m and the bit error rate is 10?7. The communication rate of the system can reach 10 Mbps when the communication distance is 60 m and the bit error rate is 10?7.