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    • 1. 发明申请
    • METHODS AND SYSTEMS FOR OPTICAL BEAM STEERING
    • 用于光束转向的方法和系统
    • WO2017223299A1
    • 2017-12-28
    • PCT/US2017/038721
    • 2017-06-22
    • MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    • SKIRLO, ScottVERGHESE, SimonHERD, Jeffery ScottJUODAWLKIS, Paul WilliamSOLJACIC, MarinSORACE-AGASKAR, Cheryl MarieYANG, YiENGLUND, Dirk RobertPRABHU, Mihika
    • G02B27/64G09G5/00H01S3/10
    • An integrated optical beam steering device includes a planar dielectric lens that collimates beams from different inputs in different directions within the lens plane. It also includes an output coupler, such as a grating or photonic crystal, that guides the collimated beams in different directions out of the lens plane. A switch matrix controls which input port is illuminated and hence the in-plane propagation direction of the collimated beam. And a tunable light source changes the wavelength to control the angle at which the collimated beam leaves the plane of the substrate. The device is very efficient, in part because the input port (and thus in-plane propagation direction) can be changed by actuating only log2 N of the N switches in the switch matrix. It can also be much simpler, smaller, and cheaper because it needs fewer control lines than a conventional optical phased array with the same resolution.
    • 集成光束转向装置包括平面介质透镜,该平面介质透镜使来自透镜平面内不同方向的不同输入的光束准直。 它还包括一个输出耦合器,如光栅或光子晶体,将准直光束以不同方向引导出透镜平面。 开关矩阵控制哪个输入端口被照亮,并因此控制准直光束的面内传播方向。 并且可调光源改变波长以控制准直光束离开基板平面的角度。 该器件非常高效,部分原因是输入端口(以及面内传播方向)可以通过仅激活开关矩阵中N个开关的log2 N来改变。 它也可以更简单,更小,更便宜,因为它需要比具有相同分辨率的传统光学相控阵列更少的控制线。