Raycus single-module CW fiber lasers, ranging from 1000W to 12000W, have been developed with the latest generation featuring high electro-optical conversion efficiency, good beam quality, high energy density, wide modulation frequency, high reliability, long service life, and maintenance-free operation, among other features. Additionally, an optimized optical fiber transmission system ensures a more stable and precise cutting effect in thick plate cutting applications. These lasers find applications in various fields including cutting, welding, drilling, scribing, and others. They offer narrow cutting slits and bright sections, providing significant advantages over similar types of lasers.