Brandl Paul, Weiss Alexander, Zimmermann Horst
Opt Lett. 2014 Jul 1;39(13):4045-8. doi: 10.1364/OL.39.004045.
In this Letter, we describe the realization of a tracked line-of-sight optical wireless communication system for indoor data distribution. We built a laser-based transmitter with adaptive focus and ray steering by a microelectromechanical systems mirror. To execute the alignment procedure, we used a CMOS image sensor at the transmitter side and developed an algorithm for image recognition to localize the receiver's position. The receiver is based on a self-developed optoelectronic integrated chip with low requirements on the receiver optics to make the system economically attractive. With this system, we were able to set up the communication link automatically without any back channel and to perform error-free (bit error rate <10⁻⁹) data transmission over a distance of 3.5 m with a data rate of 3 Gbit/s.
在这封信中，我们描述了一种用于室内数据分发的跟踪视距光学无线通信系统的实现。我们构建了一个基于激光的发射器，它通过微机电系统镜实现自适应聚焦和光束转向。为了执行对准程序，我们在发射器端使用了一个CMOS图像传感器，并开发了一种图像识别算法来定位接收器的位置。接收器基于一个自行研发的光电集成芯片，对接收器光学器件要求较低，从而使该系统在经济上具有吸引力。借助该系统，我们能够在没有任何反向通道的情况下自动建立通信链路，并在3.5米的距离上以3 Gbit/s的数据速率进行无差错（误码率<10⁻⁹）的数据传输。
