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Laser processing technology continues to make remarkable progress, and is expanding into new markets such as automobiles, fuel cells, etc. In the future, this technology will be used for processing crystalline and bio-materials. The number of applications for laser processing are diverse, including cutting, welding, drilling, grooving, and surface modification. Recently, the output power and processing speed of lasers have become higher. The enhanced performance enables users to design ideal laser processing methods based on their unique application requirements.