Title:
マルチコア光ファイバの製造方法
Document Type and Number:
Japanese Patent JP6870384
Kind Code:
B2
Abstract:
There is provided a method for producing a multicore optical fiber while reducing the mass of a glass block to be connected to a common cladding tube. A production method for a multicore optical fiber includes in order, 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 insertion step of inserting core rods in the holes in a state in which end portions of the core rods are recessed from the first end, a heat shrinkage step of reducing a diameter of the first end by heating, a sealing step of sealing the holes by connecting a glass block to the first end, and a drawing step of depressurizing insides of the holes from the second end and performing spinning from the first end while combining the common cladding tube and the core rods.
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Inventors:
Takushi Nagashima
Tetsuya Nakanishi
Tetsuya Nakanishi
Application Number:
JP2017037384A
Publication Date:
May 12, 2021
Filing Date:
February 28, 2017
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
International Classes:
C03B37/012; C03B37/027; G02B6/02
Domestic Patent References:
| JP2015193507A | ||||
| JP2016175779A | ||||
| JP2008509874A | ||||
| JP2004123468A | ||||
| JP2006160528A | ||||
| JP2014159348A |
Foreign References:
| WO2011145648A1 |
Attorney, Agent or Firm:
Towa International Patent Office