32 results about "Virtual temperature" patented technology

The invention relates to an ultralow-attenuation and large-effective-area single-mode optical fiber. The ultralow-attenuation and large-effective-area single-mode optical fiber comprises a core layer and covering layers, and is characterized in that the radius r1 of the core layer is 5mum to 8mum; the relative refractive index deltan1 of the core layer is 0 to 0.20 percent; an inner covering layer, a concave inner covering layer and an outer covering layer covers the core layer in sequence from outside to inside; the radius r2 of the inner covering layer is 8.5 to 12 mum and the relative refractive index deltan2 of the inner covering layer is smaller than or equal to 0.20 percent; the radius r3 of the concave inner covering layer is 12.5mum to 30mum and the relative refractive index deltan3 of the concave inner covering layer is smaller than or equal to 0.40 percent; the outer covering layer is a full fluorine-doped silicon dioxide glass layer and the relative refractive index deltan4 of the outer covering layer is smaller than or equal to 0.20 percent. By reasonably designing a waveguide structure and a material component of the core covering layer, viscosity matching and optical fiber stress of each part of the optical fiber are optimized, and an ultralow-attenuation performance of the single-mode optical fiber is realized. A fluorine-doped silicon dioxide outer covering layer structure is utilized, and material relaxation time of each part of an optical fiber material is changed, so that virtual temperature of the optical fiber is changed, an optical fiber section is simplified and stable control of optical fiber parameters is realized.