针对当前紫外光通信中气体灯与激光光源调制速率慢、体积较大, 光电倍增管工作电压过高等问题, 提出了一种基于现场可编程门阵列技术的日盲紫外LED实时视频传输系统, 其发射光源采用波长为265 nm的单紫外LED, 探测器采用紫外PIN; 通过电路和逻辑模块设计搭建了视频传输系统, 研究了系统的光功率密度与通信距离之间的关系; 基于二进制开关键控调制方式, 实现日盲紫外LED实时视频传输系统最大传输速率为2.88 Mbit/s, 当通信距离为4 m时, 传输速率达到1.92 Mbit/s。

Considering the slow modulation rate and large volume of the gas lamp and the laser, and the high working voltage of the photomultiplier tube (PMT) in UV communication, a solar blind ultraviolet LED real-time video transmission system based on Field Programmable Gate Array(FPGA) was proposed, which utilized single UV LED with wavelength of 265 nm at the transmitter and an UV PIN at the receiver. The video transmission system was established by designing the circuit and logic module. The relationship between the optical power density and the communication distance of the communication system was investigated. The experimental results show that the maximum transmission rate is 2.88 Mbit/s, when the communication distance is 4 m, the transmission rate can be up to 1.92 Mbit/s based on the mode of On-Off Keying (OOK) modulation for the system.