Method for manufacturing optical fiber base material and optical fiber base material
AssigneeKohoku Kogyo Co., Ltd.
InventorsKatsuyuki Imoto, Futoshi Ishii
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Abstract
The present invention provides a method for manufacturing an optical fiber base material and an optical fiber base material, the method including: arranging a rod containing SiO2 family glass for core, in a container; pouring a SiO2 glass raw material solution for cladding layer and a hardener into the container, the glass raw material solution containing a hardening resin; solidifying the glass raw material solution through a self-hardening reaction; and then drying the solidified material and heating the solidified material in chlorine gas, to manufacture an optical fiber base material in which a SiO2 cladding layer is formed in an outer periphery of the rod containing SiO2 family glass for core.
Claims36
A method for manufacturing an optical fiber base material, comprising:
- arranging a rod containing SiO2 family glass for core in a center of a container;
- pouring a SiO2 glass raw material solution for cladding layer and a hardener into the container;
- solidifying the glass raw material solution through a self-hardening reaction;
- then removing the container from the solidified material;
- and
- drying the solidified material and heating the solidified material in chlorine gas, to manufacture an optical fiber base material in which a SiO2 cladding layer is formed in an outer periphery of the rod containing SiO2 family glass for core.
A method for manufacturing an optical fiber base material, comprising:
- arranging a plurality of rods containing SiO2 family glass for core at preset intervals in a container;
- pouring a hardening-resin-containing SiO2 glass raw material solution for cladding layer and a hardener into the container;
- solidifying the glass raw material solution through a self-hardening reaction;
- then removing the container from the solidified material;
- and
- drying the solidified material and heating the solidified material in chlorine gas, to manufacture an optical fiber base material for a multi-core optical fiber.
A method for manufacturing an optical fiber base material, comprising:
- arranging a plurality of metal rods at preset intervals in a center of a container and around the center;
- pouring a hardening-resin-containing SiO2 glass raw material solution for cladding layer and a hardener into the container;
- solidifying the glass raw material solution through a self-hardening reaction;
- then removing the container and the metal rods from the solidified material;
- and
- drying the solidified material and heating the solidified material in chlorine gas, to manufacture an optical fiber base material in which a plurality of empty holes are formed in a center of a SiO2 cladding layer and around the center.
A method for manufacturing an optical fiber base material, comprising:
- arranging a plurality of metal rods at preset intervals around a center of a container;
- pouring a hardening-resin-containing SiO2 glass raw material solution for cladding layer and a hardener into the container;
- solidifying the glass raw material solution through a self-hardening reaction;
- then removing the container and the metal rods from the solidified material;
- and
- drying the solidified material and heating the solidified material in chlorine gas, to manufacture an optical fiber base material in which a plurality of empty holes are formed around a center of a SiO2 cladding layer.
A method for manufacturing an optical fiber base material, comprising:
- arranging a second container in a center of a first container having a circular external shape and a circular internal shape, the second container having a circular external shape and a quadrangular internal shape or having a quadrangular external shape and a circular internal shape, the second container including at least three thin parts in a wall at which an internal surface approaches an external surface;
- arranging a rod containing SiO2 family glass for core in a center of the second container;
- pouring a hardening-resin-containing SiO2 glass raw material solution for cladding layer and a hardener into a space between the first container and the second container and into the second container;
- solidifying the glass raw material solution through a self-hardening reaction;
- then removing the first container and the second container from the solidified material;
- and
- drying the solidified material and heating the solidified material in chlorine gas, to manufacture an optical fiber base material.
An optical fiber base material comprising:
- a rod containing SiO2 family glass for core;
- and
- a SiO2 cladding layer that covers an outer periphery of the rod containing SiO2 family glass for core, wherein
- the SiO2 cladding layer is a layer formed by solidifying a material in the form of liquid,
- an outer peripheral surface of the rod containing SiO2 family glass for core and the SiO2 cladding layer are in tight contact with each other, and
- surface roughness of an interface between the rod containing SiO2 family glass for core and the SiO2 cladding layer is less than 0.2 μm.
An optical fiber base material comprising:
- a SiO2 cladding layer;
- and
- a plurality of empty holes that are arranged at preset intervals in a center of the SiO2 cladding layer and around the center, wherein
- the empty holes are formed by molding.
An optical fiber base material comprising:
- a SiO2 cladding layer;
- and
- a plurality of empty holes that are arranged at preset intervals around a center of the SiO2 cladding layer, wherein
- the empty holes are formed by molding.
An optical fiber base material for a multi-core optical fiber, comprising:
- a SiO2 cladding layer;
- and
- a plurality of rods containing SiO2 family glass for core arranged in the SiO2 cladding layer, wherein
- the SiO2 cladding layer is a layer formed by solidifying a material in the form of liquid,
- outer peripheral surfaces of the rods containing SiO2 family glass for core and the SiO2 cladding layer are in tight contact with each other, and
- surface roughness of interfaces between the rods containing SiO2 family glass for core and the SiO2 cladding layer is less than 0.2 μm.
An optical fiber base material comprising:
- a SiO2 glass tube having a circular external shape and a circular or quadrangular internal shape;
- and
- a rod containing SiO2 family glass for core that is arranged inside the SiO2 glass tube so as to be in contact with an inner surface of the SiO2 glass tube at least three points, wherein
- surface roughness of an inner surface of the SiO2 glass tube is equal to or less than 0.4 μm.
Dependencies are inferred from the claim text.