Shanghai Gengyun Industrial Co., Ltd
Photographic fiber preform, special fiber preform technical definition
Photosensitive fiber preform : germanium/rare earth element doped quartz substrate, permanently refractive index modulated by ultraviolet irradiation, used for engraving fiber Bragg gratings (FBGs) . Special fiber preform: By doping materials (fluorine/boron/photonic crystals) and structural design, it achieves special functions…