报道一种采用三个发射器、具有自动跟踪功能的无线激光通信系统。描述了系统结构的总体设计、关键的光学、机械和伺服控制单元,包括多个800 nm波段激光发射器,980 nm信标激光发射器,光电接收器,位敏探测器,步进马达和自动跟踪微处理器等。1.3 km的工作距离下的传输实验结果表明,在155 Mb/s的传输速率下,24 h连续运行情况的无误码秒百分比达到98%以上。622 Mb/s传输速率下8 h时统计无误码秒百分比可达95%,平均误码率低于10-9。实验表明多发射器和自动跟踪技术改进了激光无线通信系统的可靠性。

A wireless laser communication system with multiple transmitter and auto-tracking is reported in this paper. The overall design, key optical and mechanical components, and servo-control sub-system are described including three laser transmitters at 800 nm, a beacon laser at 980 nm, optical detector, position sensitive detector, step motor and micro processor for auto-tracking. In experiments over a span distance of 1.3 km, percentages of error-free-second were measured to be more than 98% for 155 Mb/s during 24 hour continuous operation, and 95% for 622 Mb/s in a period of 8 hours, and bit error rate of less than 10-9. It is shown that the scheme of multiple transmitter and auto-tracking will improve the reliability of wireless laser communication systems.