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二路收发的空间光通信系统
Two-transmitter-two-receiver Free Space Optical Communication System

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文摘 研制了工作于大气中的空间光通信系统,系统的发射天线采用了两组互相独立的组合式准直光学系统,发射光源采用980nm的CW激光器,调制方式为直接电流调制;接收天线为两组折反式望远光学系统,以快速响应的PIN光电管为主探测器,四象限探测器为两个系统之间对准与否的位置探测器.该系统实现了点对点的622Mbit/s通信,正常天气情况下可实现通信的距离100m~2km.该文在给出了该系统的组成的基础上详细讨论了系统的接收与发射天线.
其他语种文摘 A free space optical communication system has been developed. In this system,two transmitters and two re-ceivers are employed..In each of the two transmitters,a compound collimation optical system has been used,and the source is an 980nm laser,which is modulated by its current directly. In each of the receivers,we use a big aperture and long focal length lens and 2 reflecting mirrors. Two receivers share a half-reflected-half-transparent mirror, a PIN detector for signal detection and a four-quadrant detector for aiming at each other. With this system,622Mbit/s air communication has been realized between point to point of a distance 100m to 2km in normal weather condition in Beijing. This paper presents details of optical systems in transmitters and receivers.
来源 激光与红外 ,2004,34(6):419-421 【扩展库】
关键词 空间光通信 ; 半导体激光器 ; PIN探测器 ; 发散角
地址

中科院半导体所, 北京, 100083

语种 中文
文献类型 研究性论文
ISSN 1001-5078
学科 电子技术、通信技术
文献收藏号 CSCD:1860566

参考文献 共 5 共1页

1.  Roberta A Ewart. Free space laser communications [ J ]. IEEE Communications Magazine,2000:124-125 被引 1    
2.  Jim Geier. Concepts and Vulnerability[DB/OL]. http://www. wi-fiplanet. com/tutorials/article. php,2002 被引 1    
3.  H Franz. a. Optical communications components and systems,2002 被引 1    
4.  P Djahani. Analysis of Infrared Wireless Links Employing Multi-Beam Transmitters and Imaging Diversity Receivers [ J ]. IEEE Trans. on Commun,2000,48:2077-2088 被引 4    
5.  David Rockwell. Wavelength selection for optical wireless communications systems[ Z ]. Free Space Optical Networking Architecture,2001 被引 1    
引证文献 1

1 李萌 大气闪烁对近似无衍射激光通信系统的影响 北京航空航天大学学报,2008,34(10):1147-1150
被引 2

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