the semiconductor laser is developing in the direction of shorter emission wavelength, larger emission power, ultra-small, and long life, to meet the needs of various applications, the product category is increasingly rich. It has also been widely used in laser processing, 3D printing, lidar, laser ranging, military, medical and life sciences. In addition, high-power direct semiconductor lasers are widely used in cutting and welding fields by coupling into optical fibers for transmission.

In many industrial applications, infrared lasers have very good results. However, for the processing of non-ferrous metals, especially copper, the absorption of non-ferrous metals to the laser is very low due to the wavelength of an infrared beam, which brings instability to the operation of the welding process, resulting in welding errors in production and resulting in waste products. For high absorption, blue light with a wavelength of 450nm is the ideal choice.