基于双光楔棱镜的激光通信光端机设计

Design of Laser Communication Optical Transceiver Based on Double Wedge Prisms

随着激光通信向负载能力有限应用平台的推广,激光通信系统逐渐向着轻量化和小型化的方向发展。作为激光通信系统的重要一环,扫描捕获单元的轻小型化设计成为亟待解决的问题。首先,基于旋转双光楔棱镜的扫描捕获单元摒弃常规的机械伺服转台,通过棱镜绕公共旋转轴的独立旋转实现大视场光束偏转。然后,基于非近轴光线追迹建立双光楔棱镜光束偏转模型并分析了双光楔棱镜的扫描模式,为轻小型激光通信光端机的研制提供了一定的参考。最后,基于旋转双光楔棱镜和四象限探测器复用技术提出并分析了一种轻小型激光通信光端机的设计和应用。

With the popularization of laser communication to the platforms with limited load capacity,laser communication system is developing towards lightweight and miniaturization.As a key role of laser communication,the design of scanning and acquisition unit is also need to be lightweight and miniaturized.In this paper,first,the double wedge prisms based scanning and acquisition unit abandons the conventional mechanical servo structure,which realizes beam deflection in large field of view by independently rotating the prisms around the common rotation axis.Then,the beam deflection model and the scanning pattern model of double wedge prisms are established by using nonparaxial ray tracing method,and the scanning mode of the double wedge prisms is analyzed,which provides a certain reference for the development of light and miniaturized laser communication optical transceivers.Finally,the design and application of a kind of lightweighted and miniaturized laser communication optical terminal is proposed and analyzed based on rotating double wedge prisms and quadrant detector multiplexing technology.