A tracking system for mobile FSO
A tracking system for mobile FSO
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DOI：
10.1117/12.763875
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发表时间：
2008-02
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影响因子：
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通讯作者：
Mouhammad K. Al-Akkoumi;H. Refai;J. Sluss
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文献类型：
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作者：
Mouhammad K. Al-Akkoumi;H. Refai;J. Sluss
自由空间光学(FSO)，或称光无线，是一种未经许可的视线技术，它使用调制激光在大气中传输信息。通过使用光束，FSO可以通过空中传输和接收数据、语音、视频和信息。FSO提供从100 Mbps到2.5Gbps的数据速率。在大多数应用中，FSO收发器通常保持在静态位置，以确保连续的视线并保持精确对准。FSO技术目前面临的一个挑战是实现移动性的愿望。作为一种潜在的解决方案，本研究引入了一个自动跟踪系统，该系统将实现并维护两个移动FSO节点之间的对准。这种自动跟踪系统可以用于许多不同的应用，例如减少实现FSO链路对准所需的时间，以及维护飞机和固定指挥所之间的链路，以通过高速激光通信交换实时视频和数据。在链路启动后，自动跟踪系统应用程序将向定位框架发回转向命令。这些转向命令由位置传感二极管(PSD)的反馈确定。拟议的FSO自动跟踪系统提供了光束转向和捕获机制，以在两个固定或移动的收发信机之间提供跟踪。在本文中，我们说明了这种系统的可行性，并给出了在移动环境中对准PSD的源的实验结果。
Free-space optics (FSO), or Optical Wireless, is an unlicensed line-of-sight technology that uses modulated lasers to transmit information through the atmosphere. By using light beams, FSO can transmit and receive data, voice, and video, information through the air. FSO provides data rates ranging from 100Mbps to 2.5Gbps. In most applications, FSO transceivers normally remain in a static location to ensure continuous line of sight and to maintain accurate alignment. One current challenge facing FSO technology is the desire to implement mobility. As a potential solution, this study introduces an auto-tracking system that will achieve and maintain alignment between two mobile FSO nodes. This auto-tracking system can be used in many different applications, such as reducing the time needed to achieve alignment of an FSO link, and maintaining a link between an aircraft and a stationary command post to exchange real-time video and data with high-speed laser communications. After link initiation, the auto-tracking system application will send steering commands back to the positioning gimbal. These steering commands are determined by feedback from Position Sensing Diodes (PSDs). The proposed FSO auto-tracking system provides optical beam steering and capturing mechanisms to provide tracking between two transceivers, either fixed or mobile. In this paper, we illustrate the feasibility of such a system and present experimental results for a source aligned with a PSD in a mobile environment.