Manufacturing method of multi-core optical fiber
A technology of multi-core optical fiber and manufacturing method, which is applied in the direction of multi-core optical fiber, manufacturing tools, cladding optical fiber, etc., and can solve the problem of increasing the amount of communication data, etc.
Active Publication Date: 2022-03-22
SUMITOMO ELECTRIC IND LTD
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- Application Information
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Problems solved by technology
In TV broadcasting, for example, so-called 4K broadcasting and 8K broadcasting have been partially started or planned, and the distribution of broadcasting via cable TV has increased the amount of communication data
Method used
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Embodiment
[0019] figure 1 A preform forming step in a method of manufacturing a multi-core optical fiber according to an embodiment of the present invention is shown. In the manufacture of a multi-core optical fiber, the common cladding tube 1 is first formed in a preform forming step. figure 1 It is a side sectional view of the common clad pipe 1 .
[0020] The common cladding tube 1 is made of quartz glass. The common cladding pipe 1 includes a first end 11 , a second end 12 and an outer peripheral portion 10 . Inside the common cladding pipe 1 , a plurality of holes extend axially between the first end 11 and the second end 12 . The term "axial" refers to the direction from the first end 11 to the second end 12 or the direction opposite to this direction. although figure 1 shows the hole V 1 to hole V 5 , but the holes can be arranged in a hexagonal close-packed structure to increase the density of the holes. In the hexagonal close-packed structure, when viewing the common cl...
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Abstract
The present invention provides a method of manufacturing a multi-core optical fiber for manufacturing a multi-core optical fiber while depressurizing holes in a common cladding tube. The manufacturing method of a multi-core optical fiber includes: a preform forming step of forming a common cladding tube having a plurality of holes extending between a first end and a second end; an end face processing step of forming The common cladding tube is dug and cut to a predetermined depth to form a third end; connecting step: connecting the glass tube to the second end; inserting step: inserting the mandrel into the hole and inserting to the third end; sealing step: connecting the first end sealing; and a drawing step of drawing the multi-core optical fiber while depressurizing the hole through the glass tube and bonding the common cladding tube and the core rod from the first end.
Description
technical field [0001] The present invention relates to a method of manufacturing a multi-core optical fiber. Background technique [0002] Recently, the amount of data transmitted via optical fibers by optical communication has been increasing. One reason is that the amount of communication data using mobile phones has increased, which has increased the amount of communication data between base stations and between base stations and telecom operators. In television broadcasting, for example, so-called 4K broadcasting and 8K broadcasting have been partially started or planned, and distribution of broadcasting via cable TV has increased the amount of communication data. [0003] In order to cope with an increase in the amount of communication data, multi-core optical fibers each including a plurality of cores have been actively researched and reported. In a multi-core optical fiber, a plurality of cores are arranged in a common cladding made of glass along the extending dir...
Claims
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IPC IPC(8): C03B37/027C03B37/012
CPCC03B37/01214C03B37/027C03B2203/10C03B2205/08C03B37/01231C03B37/01251C03B37/0126C03B37/02745C03B2205/07C03B2205/45C03B37/02736C03B2203/34C03B37/02772C03B37/01222G02B6/02042
Inventor 永岛拓志中西哲也
Owner SUMITOMO ELECTRIC IND LTD