Design of Electric Power Control System by Single Chip for Semiconductor Laser

A diode laser output power system controlled by microprocessor C8051F is presented.The work current of diode laser controlled by stable current source and light power feedback.This constant current source uses a high power Darlington transistor as the current control device,the value and range of the output current which can be adjusted are very large.The constant current source has protective and slow start function and so on.