Abstract: An apparatus for optical fiber manufacturing process is provided, including a raw material providing structure, a dopant providing structure, and a preform forming substrate tube. The dopant providing structure is disposed at a downstream side of the raw material providing structure and in communication with the raw material providing structure. The dopant providing structure includes an outer tube, a first inner tube, a first dopant providing container, a second inner tube, and a second dopant providing container. The first inner tube is disposed in the outer tube. The first dopant providing container is disposed in the first inner tube. The second inner tube is disposed in the outer tube at a downstream of the first inner tube. The second dopant providing container is disposed in the second inner tube. The preform forming substrate tube is disposed at a downstream side of the dopant providing structure.

Abstract: An apparatus for optical fiber manufacturing process is provided, including a raw material providing structure, a dopant providing structure, and a preform forming substrate tube. The dopant providing structure is disposed at a downstream side of the raw material providing structure and in communication with the raw material providing structure. The dopant providing structure includes an outer tube, a first inner tube, a first dopant providing container, a second inner tube, and a second dopant providing container. The first inner tube is disposed in the outer tube. The first dopant providing container is disposed in the first inner tube. The second inner tube is disposed in the outer tube at a downstream of the first inner tube. The second dopant providing container is disposed in the second inner tube. The preform forming substrate tube is disposed at a downstream side of the dopant providing structure.

Abstract: A drawing system for polygonal optical fiber is provided, comprising: a clamping moving device, a furnace, a protective layer coating device, at least a protective layer drying system, and a fiber take-up device, all arranged from top to bottom; the clamping moving device clamping a polygonal preform rod and slowly moving the preform rod into the furnace; a polygonal optical fiber extracted from bottom of the furnace passing sequentially through the protective layer coating device, the protective layer drying system, and finally the fiber take-up device controlling drawing speed of the polygonal optical fiber, characterized in that: at least two optical fiber micrometers being disposed between the furnace and the protective layer coating device, and the two optical fiber micrometer respectively measuring two outer diameters of different sizes of the polygonal optical fiber; the fiber take-up device adjusting the drawing speed according to measurement results of the optical fiber micrometers.