Abstract: 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.

Key words: optical phased array (OPA), phase control (PC), high precision, wide range