Design and Research on Constant Driving Power Supply for High Precision Multi-Channel Lasers
In order to achieve time-sharing operation and conduct reliability test for multiple lasers,and reduce the size of the driv-er circuit,multiplex selector and analog switch are chosen to realize the switching of photodiode(PD)and avalanche photodiode(APD)under multiple channels,and the digital-to-analog converter(DAC)chip with different working voltages is configured to real-ize the constant driving power circuit that can drive multiple channels of various laser diodes.In the circuit design,the deep negative feedback is used to improve the stability of the system,the dual operational amplifier(OPA)and MOS tubes are designed to further reduce the deviation caused by leakage current and optimize the voltage-current linearity.In the software design,the reinforcement learning Actor-Critic framework is introduced for the adaptive adjustment of the radial basis function and proportional integral deriva-tive(RBF-PID)algorithm parameters to shorten the system dynamic balancing time,At the same time,it has an intelligence;The ex-perimental results show that the driving power supply has the shortages of a high output precision of less than 0.1％,high stability of less than 0.05％,low ripple coefficient of less than 1 μA,quick dynamic reaction time,and strong anti-interference ability.
laser diodeanalog switchconstant drive power supplyActor-CriticRBF-PID
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