Method of controlling FPGA-based pulsed fiber laser power control system for laser marking

Abstract

The invention provides an FPGA (field programmable gate array) based pulse fiber laser power control system applied to laser marking and a control method. The pulse fiber laser power control system comprises a computer, a power control system and a pulse fiber laser, the computer is used for sending out a control signal, the power control system is implemented based on an FPGA, and the pulse fiber laser emits out laser under control. The method includes performing output power value distribution of laser output voltage and semiconductor laser output power, comparing power of constant-current source driving with power of latching, and feeding back a comparative result to a constant-current source for driving. The requirement on laser marking can be well met according to output light power of the pulse fiber laser, output size of power is monitored in real time through a fuzzy control algorithm of double-ended input and single-ended output, and size of current of a constant-current source driving circuit is regulated according to a feedback power value so as to guarantee stability of the output power.

Description

technical field [0001] The invention relates to a power control system of a pulse fiber laser. Specifically, the present invention relates to a control system and control method of an FPGA-based pulsed fiber laser used in laser marking. Background technique [0002] Since the advent of fiber lasers, it has received widespread attention at home and abroad. Fiber lasers are further divided into continuous type and pulse type. Since the peak power of the pulsed fiber laser output laser is several orders of magnitude higher than that of the continuous laser, a higher peak power can be obtained at a lower output energy, and it has a certain repetition rate, high energy, high peak power and high beam quality. Short pulse laser makes it more widely used. Because pulsed fiber laser has many advantages such as excellent beam quality, high power and power density, easy cooling, high stability and reliability, it is widely used in laser marking, printing, micromachining, selective c...

AI Technical Summary

Problems solved by technology

However, due to the late start of domestic research in this area, most of them are in the stage of experimental research. To achieve industrialization, there is still a certain gap between commercialization and foreign countries. Therefore, a pulsed fiber laser with more product effect and more precise control is needed. power control system

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