Everfoton's Square Core Fiber utilizes an innovative structural design and advanced processing techniques to precisely control the beam propagation mode. It enables the direct output of high-uniformity non-circular beam profiles such as square and rectangular shapes, while maintaining high transmission eciency and excellent compatibility with conventional fibers.This fiber significantly reduces the integration diculty and complexity of spatial beam shaping systems, enabling ecient integration into flexible links for applications in laser cleaning,illumination, heating, measurement, medical and other fields.