Optical fiber, and system and method for manufacturing optical fiber

Abstract

An optical fiber comprises, from a center to a periphery, a fiber core of undoped silica; a cladding layer; and a coating of polyacrylate, wherein the fiber core has a radius of 5 to 7 μm and an ellipticity of less than 1.5%, the cladding layer with an ellipticity of less than 0.4% comprises inner, intermediate, and outer cladding layers, the inner cladding layer being doped with fluorine of 5 to 12 μm thickness, and refractive index difference to fiber core of −0.4 to −0.2%, the outer cladding layer being undoped quartz of 25 to 45 μm thickness, and the coating comprises an inner coating of 25 to 40 μm thickness, and an outer coating of 25 to 35 μm thickness and an ellipticity of less than 2%. The optical fiber has high durability and large effective transmission area, a method and system for preparing such optical fiber are also disclosed.