Laser energy control method and system

Abstract

A laser energy control method, comprising the following steps: outputting a first pulse signal to a laser, so that the laser is in a preheating state; after a delay time t, outputting a second pulse signal to the laser, and the laser starts to emit light ; After the light-emitting time t2, stop outputting the second pulse signal to the laser, so that the laser is in a preheating state; after the preheating time t1, stop outputting the first pulse signal to the laser; wherein, t1 =2t+t2; therefore, in the process of material processing, the laser emits light only when the first pulse signal and the second pulse signal act simultaneously, and the power of the laser is the highest at this time. However, when there is only the first pulse signal, the laser is only in the preheating state and will not affect the processed material. In this way, it is possible to avoid the phenomenon that the processing efficiency is affected by low power, and the phenomenon of charring and carbonization of the processing edge of the processing material is caused. In addition, a laser energy control system is provided.

Description

technical field [0001] The invention relates to laser energy control, in particular to an efficient and high-power laser energy control method and system. Background technique [0002] In the current laser energy control, the general control method is that the laser starts to emit light when the modulation pulse is output, and the laser stops emitting light when the modulation pulse ends. The laser power in the entire laser light-emitting cycle is very low, and it needs to be processed at one position repeatedly, which will cause the edge of the processed material to be burnt and charred, which cannot meet the continuous improvement of processing technology requirements. as attached figure 1 As shown, the light emitting cycle includes the beginning stage of Gaussian light energy rising slowly and the stopping stage of energy falling slowly. These two stages occupy a large proportion of time in the entire laser light emitting cycle, resulting in low laser power and seriously...

AI Technical Summary

Problems solved by technology

The laser power in the entire laser light-emitting cycle is very low, and it needs to be processed repeatedly at one position, which will cause the edge of the processed material to be burnt and carbonized, which cannot meet the continuous improvement of processing technology requirements

as attached figure 1 As shown, the light emitting cycle includes the beginning stage of Gaussian light energy rising slowly and the stopping stage of energy falling slowly. These two stages occupy a large proportion of time in the entire laser light emitting cycle, resulting in low laser power and seriously affecting Processing efficiency, resulting in burning and carbonization of the processing edge of the processing material

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