光学相控阵相位驱动电路的设计与实现

Design and Implementation of Optical Phased Array Phase Control Circuit

为了驱动光学相控阵(OPA:Optical Phased Array)实现全固态激光雷达的光束扫描,设计并实现了两种用于OPA相位控制的驱动电路,其中包括电流源驱动和电压源驱动两种驱动电路。采用PC(Phase Control)端的上位机软件控制连接到电流源或电压源的单片机,对OPA各路相位控制端的电流或电压进行调节,改变OPA远场光束主极大的位置,从而达到光束偏转的目的,实现光束扫描。分析了多通道、高功率、高精度、宽范围的电流源和电压源的驱动原理,完成了系统的软硬件设计与实现。最后进行了误差与线性度测试和OPA相位控制实验,结果证明了该驱动电路的可行性与正确性。提出的两种OPA相位控制电路原理简单、稳定性强、方便实用,在高精度OPA相位控制方面具有一定的应用价值。

In order to drive OPA(Optical Phased Array) to realize beam scanning of all solid state lidar,two drive circuits for OPA phase control are designed and implemented,including current source drive and voltage source drive. The upper computer software at the PC(Phase Control) terminal is used to control the microcontroller connected to the current source or voltage source,and the current or voltage at each phase control terminal of OPA is adjusted to change the main maximum position of OPA far-field beam,so as to achieve the purpose of beam deflection and beam scanning. The driving principle of multi-channel,high power,high precision,wide range current source and voltage source is analyzed. Finally,the error and linearity test and OPA phase control experiment are carried out. The experimental results prove the feasibility and correctness of the drive circuit. The proposed two OPA phase control circuits are simple in principle,strong in stability,convenient and practical,and have certain application value in high precision OPA phase control.