The power of fiber lasers can be increased through module stacking and beam combination, during which the overall volume of the lasers is also increasing. In 2017, a 6kW fiber laser composed of multiple 2kW modules was introduced into the industrial market. At that time, 20kW lasers were all based on combining the 2kW or 3kW. This led to bulky products. After several years of effort, a 12kW single-module laser comes out. Compared to the multi-module 12kW laser, the single-module laser has a weight reduction of about 40% and a volume reduction of about 60%. TEYU rack mount water chillers have followed the trend of miniaturization of lasers. They can efficiently control the temp of fiber lasers while saving space. The birth of the compact TEYU fiber laser chiller, combined with the introduction of miniaturized lasers, has enabled entry into more application scenarios.