A brief introduction to one to two fiber optic cables, with fiber core diameters of 105/200/300/400/600/800/1000um. The application wavelengths include ultraviolet fiber and visible near-infrared fiber, and the jumper length can be customized according to customer needs. In the process of spectral detection, optical fiber becomes an essential connecting device, simplifying the process of building the optical path and allowing customers to focus more intuitively and effectively on spectral detection.