空间光通信广角接收馈源研究进展  

Development of Wide Field-of-view Receiver Feeder for Optical Wireless Communication

作　　者：李光元[1] 徐安士[1] 

机构地区：[1]区域光纤通信网与新型光通信系统国家重点实验室(北京大学),北京100871

出　　处：《中兴通讯技术》2008年第2期44-48,共5页ZTE Technology Journal

基　　金：国家自然科学基金资助项目(60772002)

摘　　要：为了将光通信一些优越性能应用于空间光探测、空间光通信和民用个人通信,在目前光纤只有非常小的数值孔径的情况下,需要对微弱空间光信号进行广角接收,以便使接收角度达数十度、以致半个空间的光信号能进入光纤接收系统。然后可以对其中光信号进行光放大和处理。文章将空间光广角接收馈源分为传统接收馈源和耦合入纤接收馈源两大类,着重于讨论后者。前者由于受制于光学系统和传统滤波器对视场角的限制,其灵敏度和视场角难以同时得到提高。而后者有望解除这些限制,真正实现对微弱空间光信号的非扫描式广角接收,应该是今后的发展方向,具有广泛应用前景。空间光广角接收的实现将有力促进空间光通信、个人通信和光探测技术的发展,加大空间通信的带宽,对未来通信将产生不可估量的影响。In order to extend advantages of optical fiber communication such as optical amplification and processing to space optical detection, optical wireless communication and personal communication, it is necessary to receive weak optical signals from free-space into optical fibers in such a wide Field-of-view （FOV）. In that case, FOV can be enlarged to tens of degrees; and then, half space could be received, However, this is not easy because the fiber＇s numerical aperture is usually small. Wide FOV receiver feeders for optical signals from free-space are categorized into conventional feeder and fiber-based feeder in this paper, with the latter expounded emphatically. Analysis shows that it is difficult to improve the sensitivity and FOV of the conventional feeder, whose FOV is limited by the optical system and conventional filters, at the same time. The fiber-based feeder, however, has a great potential to eliminate the limitations in the conventional feeder, and to realize a non-scanning wide FOV feeder. Thus, the latter is the development trend and has a wide application prospect. The realization of wide FOV receiver for optical signals from free-space will accelerate the development of optical wireless communication, personal communication and space optical detection, as well as increase the bandwidth of space communications; it also has a great influence on future communication.

关 键 词：空间光通信 厂角接收馈源 耦合入纤接收 

分 类 号：TN929.1[电子电信—通信与信息系统]