Blue Semiconductor Laser

As metal processing technology continues to advance and user requirements continue to increase, lasers need to innovate in terms of cost and energy efficiency as well as laser system performance. For non-ferrous metals, the absorption of light energy increases with the decrease of light wave length. For example, the light absorption of copper at the wavelength below 500nm will increase by more than 50% than infrared light, so blue semiconductor laser is more suitable for the processing of copper. For one thing, blue light has certain properties. High reflectivity metal materials have a high absorption rate of blue light, which means that blue light has a huge advantage in metal processing of high reflective materials such as copper. On the other hand, semiconductor lasers based on gallium nitride materials can directly generate laser wavelengths of 450nm without further frequency doubling, thus having higher energy conversion efficiency.

Superiority of blue semiconductor laser

First, Blu-ray has a wide process window that can handle every stage of battery manufacturing, welding thicker and a variety of materials, such as copper, gold and stainless steel a few millimeters thick. It is ideal for manufacturing prismatic batteries, battery housings, and battery packs and battery integrations.

Second, using a blue light semiconductor light source with a wavelength of 450nm, the copper material can be melted in thermal mode, which allows precise adjustment of the molten pool geometry of thin copper materials. Stable energy absorption and precise control of heat conduction are particularly important for deep fusion welding of thin copper materials, mainly because it helps prevent cutting or splashing of thin materials due to high pressures. Perfect mechanical connection and excellent electrical conductivity can be achieved in both butt and edge welding.

Third, the printer can use a blue semiconductor laser developed at Osaka University to produce pure copper. The laser focused spot diameter of 100μm was realized on the powder bed, and pure copper with high conductivity and thermal conductivity could be laminated.

Fourth, greater penetration depth also opens up electric vehicle applications to maximize thermal and electrical efficiency. These three blue laser hairpin welds show consistent quality, which is critical for improving production efficiency. Blue lasers can produce hairpin welds, which are important for high-density, high-strength electric motors.

Fifth, high power and brightness also increase the flexibility of the welding process, making it possible to extend the range of materials processed. The research shows that blue laser can effectively solve the problem of welding dissimilar metals. Welding of dissimilar metals usually results in the formation of intermetallic compounds that impair the mechanical and electrical properties and consistency of the joint. The latest generation of blue semiconductor lasers can weld heterogeneous materials with a wide range of processing parameters and minimum defects.

Development and application of blue semiconductor lasers

2kW blue light semiconductor laser has shown its advantages in metal processing, especially in high reflection metal material processing. The brightness and power of blue semiconductor lasers continue to rise to new limits, which will lead to more and wider applications. In addition to efficient processing of metal materials, blu-ray semiconductor lasers are expected to be used across sectors, particularly mechanical engineering departments that will be able to process laser materials with blue light underwater. This is a huge advantage for manufacturing. In addition, the lighting industry can also use high-quality lighting technology based on blue semiconductor lasers. In life, copper materials are widely used in batteries, motor motors, power turbines and gas furnaces. In addition, copper materials are also used in many parts of some electronic products. Compared with infrared laser, blue semiconductor laser has greater advantages in processing copper materials. New laser technology breakthroughs often bring new material processing applications, blue laser will also be a good application market breakthrough. The rise of the Internet of Things and artificial intelligence has prompted a new paradigm shift in industry. Laser processing technology will play a leading role in the next generation of intelligent manufacturing due to its natural advantages of integrating NUMERICAL control technology and remote processing, and the need to change tools. The rise of blue semiconductor laser brings another surprise to laser technology.