离轴旋转光通信系统的设计与实现

Design and implementation of an off-axis rotary optical communication system

将两个光学准直器用于离轴旋转光通信系统,并分别置于通信系统中两端的旋转部件,使准直器的光轴与旋转部件的轴线平行,从而保证光信息在较大间距且相对旋转的两个筒状部件之间的可靠传输。结合光端机、光分路器、语音视频采集卡和电脑等设备,使系统具有实时传输语音视频信号的功能。实验结果表明,在旋转部件间距小于500mm,其转速小于120r/min的条件下,系统满足1.25Gbit/s的高速率光信号的稳定传输。

The performance of collimator with large beam spot and large aperture is analyzed in the rotary communication system,and an off-axis rotary optical communication system is designed to perform the function that the optical signal transmits between two rotating cylindrical parts in a long distance. In the system, collimators are set on the two rotating cylindrical parts and their optic axes are adjusted to be parallel to ensure the reliable transmission during the whole rotating process. By combining equipments, such as optical transceiver,optical splitter,dala acquisitJon card and computer etc. , the function of realtime monitoring can be achieved. The experiment results show that the optical signal in high transmission rate of 1.25 Gbit/s can be sent and received stably by the system while the distance between two rotating cylindrical parts is less than 500 ram,and the rotation speed is less than 120 r/min.