Photosensitive Fiber

Photosensitive optical fibers are manufactured using the in-tube chemical vapor deposition process, with fiber cores adopting high germanium-doped and boron-germanium co-doped schemes respectively, combined with reasonable waveguide structure design, giving the fibers strong photosensitivity. Under ultraviolet laser irradiation, the refractive index in the fiber core region can change, thereby enabling gratings to be written into the fiber core. By controlling the grating structure and writing parameters, reflection, selection, and filtering of optical signals at specific wavelengths can be achieved. This series of fibers is mainly suitable for fields such as fiber-optic sensing, fiber lasers, fiber Bragg gratings, and gain flattening filters.