Laser power supply system, circuit control method thereof and laser

The embodiment of the invention discloses a laser power supply system, a circuit control method thereof and a laser. The laser power supply system comprises a boosting unit, a constant current unit and a main control unit, wherein the boosting unit is used for boosting an input voltage and obtaining a first output voltage, and the first output voltage is supplied to the constant current unit; theconstant current unit is used for performing constant current processing on the first output voltage and obtaining a second output voltage with constant current output, and the second output voltage is supplied to a laser module; and the main control unit is connected with the boosting unit and the constant current unit and is used for controlling the first output voltage of the boosting unit andan output current of the constant current unit so as to ensure stable output of the laser power supply system. 本发明实施例公开了一种激光器电源系统及其电路控制方法、激光器，所述激光器电源系统包括升压单元、恒流单元和主控单元，所述升压单元，用于将输入电压进行升压处理并获得第一输出电压供给恒流单元；所述恒流单元，用于将所述第一输出电压进行恒流