High-power all solid-state axisymmetric polarization laser for laser machining

Abstract

The invention discloses a high-power all solid-state axisymmetric polarization laser for laser machining. The laser comprises an all solid-state laser generation device. The all solid-state laser generation device comprises a main oscillator for generating a laser beam and a power amplifier for amplifying the output power of the main oscillator, wherein the main oscillator comprises a completely reflecting mirror and an all solid-state single crystal pumping module, which are arranged along the same optical axis; and a polarized light focusing surface is formed between the completely reflecting mirror and the all solid-state single crystal pumping module. The laser also comprises a polarization element which is arranged at a joint of the optical axis between the completely reflecting mirror and the all solid-state single crystal pumping module and the polarized light focusing surface. By the laser, laser in an axisymmetric polarization state can be output, so that the efficiency and accuracy of the laser machining are improved.

Description

technical field [0001] The invention generally relates to the field of semiconductor lasers, in particular to a high-power all-solid-state axis-symmetric polarized laser for laser processing. Background technique [0002] Laser processing includes the use of high-power lasers to achieve metal texturing, cutting, drilling, bending, welding and other operations. Compared with traditional processing methods, laser processing has the advantages of wide application range, high processing precision, fast and efficient, etc. The principle is that the high-intensity and high-energy laser beam interacts with the material, and the separation and shape of the material are realized by using the generated thermal effect. Therefore, the key to improving the accuracy and efficiency of laser processing lies in how to control the area and absorption efficiency of the material for the laser beam. [0003] For lasers, axisymmetric polarized light is a vector beam with a special polarization s...

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Problems solved by technology

[0004] At present, although laser processing uses gas as a gain medium to obtain tens of kilowatts of high-power axisymmetric laser output, its spot mode is poor, its precision is low, and its stability cannot be compared with solid-state lasers.

However, because the axisymmetric vector beam with a phase singularity has a singularity in the light intensity of the solid-state laser, ordinary lasers cannot produce an axisymmetric polarization mode.

Moreover, most of the solid-state lasers used in laser processing used to be pumped by xenon lamps, which essentially determines that the lasers cannot have long life and high efficiency.

[0005] In the above-mentioned prior art, no matter whether the existing laser light source is a xenon lamp laser or a solid-state laser, the laser beam generated by it has defects, so it is impossible to produce an axially symmetrical polarization mode, so that it is impossible to effectively control the laser beam of the material. The area of ​​beam action and absorption efficiency, therefore, cannot obtain high-precision processing effect

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