A multi-layer blue light semiconductor laser spectrum combining device

Abstract

The invention discloses a multi-layer blue-light semiconductor laser spectral beam combining device, which belongs to the technical field of blue-light semiconductor lasers, and comprises: a beam compression element, a slow-axis collimating mirror group, a beam deflection element, a diffraction grating, and a reflection mirror and an output coupling mirror; wherein, the beam compression element includes vertically stacked multilayer prisms; the number of layers of the prisms is the same as that of the blue light to be combined, and each layer of blue light is respectively incident on a corresponding layer of prisms; through beam compression The element transmits the first type of blue light in each layer, and at the same time compresses the distance between the blue light beams in the second type of blue light in each layer, while reducing the aberration of the blue light away from the optical axis and the feedback crosstalk between the beams. Under the premise of the same size, other components can allow more blue light beams to pass through, thereby increasing the number of blue light beams used for spectral combining, and can greatly increase the output of blue light lasers with a smaller volume while ensuring the beam quality power.

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...

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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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