Lasers with Adaptive Adjustment of Laser Power

Abstract

The invention discloses a laser device with an adaptively adjusted laser power. The laser device comprises a pump light source, a clad optical fiber and a transmission fiber, wherein the side surface or the end surface of the pump light source pumps the clad optical fiber; the clad optical fiber further comprises a laser gain medium fiber core located at the center; the laser gain medium fiber core is sequentially coated with an isolating layer, a fluorescent material layer and an outer clad layer from the inside to the outside; the refractive index of the laser gain medium fiber core is greater than that of the isolating layer; the refractive index of the isolating layer is greater than that of the fluorescent material layer; the refractive index of the fluorescent material layer is greater than that of the outer clad layer; a first fiber bragg grating and a second fiber bragg grating are arranged at an input end and an output end of the clad optical fiber respectively; the end surface, located at one side of the pump light source, of the clad optical fiber is provided with a tail mirror; and a first convex lens and a second convex lens are sequentially arranged between the clad optical fiber and the transmission fiber. By the laser device, the perforating rate is greatly improved. Perforation can be automatically carried out by the maximum power close to the critical value; and safety redundancy does not need to be preset, so that the perforation efficiency is greatly improved; and the perforation reject ratio is also reduced.

Description

technical field [0001] The invention relates to a laser with self-adaptive adjustment of laser power, which belongs to the technical field of laser cutting. Background technique [0002] The existing laser cutting process control method is mainly to complete the cutting process through the preset trajectory, speed and power of the program. There is a contradiction between efficiency and yield in the existing laser processing technology, such as perforation. In order to complete the perforation quickly, we hope to use high power to provide greater energy input, but the input energy is too high and it is easy to cause molten pool The violent gasification of the metal material in the medium causes an explosion, which causes the perforation to fail, and produces splashes that contaminate the lens. The traditional solution is to preset a relatively low power in the program, and take a long time to complete the piercing to ensure penetration, and reserve high redundancy to ensure...

AI Technical Summary

Problems solved by technology

There is a contradiction between efficiency and yield in the existing laser processing technology, such as perforation. In order to complete the perforation quickly, we hope to use high power to provide greater energy input, but the input energy is too high and it is easy to cause molten pool The violent gasification of the metal material in the medium causes an explosion, which causes the perforation failure, and produces splashes to contaminate the lens

The traditional solution is to preset a relatively low power in the program, and take a long time to complete the piercing to ensure penetration, and reserve high redundancy to ensure the quality and safety of the piercing. This method saves low processing efficiency. , too dependent on past experience and data, and it is difficult to achieve real-time control, because these problems are more prominent when processing new products

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