Abstract:With the wide application and rapid development of fiber laser, market competition and cost control are increasingly strengthened, the control and protection of its optical and electronic system have become the key to the application of fiber laser. To achieve the intelligent control of the laser and pre-alarm protection, reduce the production and maintenance costs, a design of the software and hardware for the laser monitoring system, and its test results has been introduced in detail in this paper.The serial port communication software of USB to RS232 was programed by Visual Basic, and these hardware circuits of laser power drive, fault protection and data acquisition was designed with STM32F407ZG microcontroller as the core. The power (0 ~ 100%) of the fiber laser was controled by PC software, and these datas of pump source temperature, working current and state can be collected and monitored in real time. According to the measurement of the output power of the 300W fiber laser, the optical conversion efficiency of the system is as high as 70.53%. At the same time, the power output stability of the laser reaches 96.6% after continuously worked about 72 hours. This design has been widely used in cutting, welding, precision drilling, 3D engraving and other industrial processing fields in the actual production.
