Multi-layer blue light semiconductor laser spectrum beam combining device

Abstract

The invention discloses a multi-layer blue light semiconductor laser spectrum beam combining device, which belongs to the technical field of blue light semiconductor laser, and comprises a light beam compression element, a slow axis collimating mirror group, a light beam deflection element, a diffraction grating, a reflector and an output coupling mirror which are sequentially arranged along a light path direction, wherein the light beam compression element comprises a plurality of layers of prisms which are vertically stacked; the number of layers of the prisms is the same as the number of layers of blue light to be combined, and each layer of blue light enters the corresponding layer of prism; blue light of each layer of a first type is transmitted through the light beam compression element, and the distance between blue light beams in blue light of each layer of a second type is compressed, so that aberration of blue light rays far away from an optical axis and feedback crosstalk between the light beams are reduced, and other elements can allow more blue light beams to pass through on the premise of the same size; therefore, the number of the blue light beams used for spectrum beam combination is increased, and the output power of the blue light laser can be greatly improved on the premise that the light beam quality is guaranteed with a small size.

Description

technical field [0001] The invention belongs to the technical field of blue light semiconductor lasers, and more specifically relates to a multi-layer blue light semiconductor laser spectrum combining device. Background technique [0002] Since copper and other metals with high reflectivity absorb much more blue light than red light, blue lasers will be widely used in Cu 3D printing and metal welding. Blue light semiconductor lasers are an important development trend at present, and the laser power can reach hundreds of watts or even kilowatts of output. The BLUE IMPACT blue light impact diode laser developed by Japan's Shimadzu in 2015 can output 100W blue light laser, which can be applied to 3D printing, and can use pure copper powder to replace the existing copper alloy to achieve better processing effect In 2019, the Nuburu company in the United States used 256 blue light semiconductor light emitting units with an output power of 4W to make a blue light module with an o...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a multi-layer blue light semiconductor laser spectral beam combining device to solve the problem that the prior art cannot increase the output power of the blue light laser with a smaller volume under the premise of ensuring the beam quality technical problem

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