WO2008127001A1 - Ferrule et procédé permettant de fabriquer une ferrule en formant un trou interne au moyen d'une fibre optique - Google Patents

Ferrule et procédé permettant de fabriquer une ferrule en formant un trou interne au moyen d'une fibre optique Download PDF

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Publication number
WO2008127001A1
WO2008127001A1 PCT/KR2008/001899 KR2008001899W WO2008127001A1 WO 2008127001 A1 WO2008127001 A1 WO 2008127001A1 KR 2008001899 W KR2008001899 W KR 2008001899W WO 2008127001 A1 WO2008127001 A1 WO 2008127001A1
Authority
WO
WIPO (PCT)
Prior art keywords
hole
ferrule
optical fiber
formation portion
optical fibers
Prior art date
Application number
PCT/KR2008/001899
Other languages
English (en)
Inventor
Sang-Hyun Choi
Original Assignee
Bioptic.Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020080031243A external-priority patent/KR100958446B1/ko
Application filed by Bioptic.Co., Ltd. filed Critical Bioptic.Co., Ltd.
Publication of WO2008127001A1 publication Critical patent/WO2008127001A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/0074—Production of other optical elements not provided for in B29D11/00009- B29D11/0073
    • B29D11/0075—Connectors for light guides
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3834—Means for centering or aligning the light guide within the ferrule
    • G02B6/3841—Means for centering or aligning the light guide within the ferrule using rods, balls for light guides

Definitions

  • the present invention relates to a method of manufacturing a ferrule of an optical connector, and more particularly, to a method of a manufacturing a ferrule by forming an inner hole by using an optical fiber and a ferrule manufactured according to the method.
  • optical device and optical fiber capable of processing optical signals without electro-photo conversion and photo-electric conversion and an associated optical switching transmission technology have been actively researched and developed. In addition, some technologies have already developed.
  • FIG. 1 (a) and (b) are transverse and longitudinal cross-sectional views of an optical fiber 10, and FIG. 1 (c) is a schematic perspective view illustrating layers of the optical fiber.
  • the optical fiber 10 includes a core 100, a cladding layer 110, and a coating layer 120.
  • the core 100 and the cladding layer 110 of the optical fiber 10 are mainly made of a quartz glass.
  • the coating layer 120 is formed by coating an outer surface of the cladding layer 110 with a resin such as acrylate so as to protect the core 100 and the cladding layer 110.
  • the core 100 is made of a glass having a refractive index nl of 1.47, a signal passing through the core is subject to internal total reflection.
  • the cladding layer 110 surrounding the outer surface of the core 100 is made of a glass having a refractive index n2 of 1.46.
  • an optical connector is used to connect optical fibers.
  • the optical fibers are fixed by using a ferrule, and after that, the optical fibers are connected.
  • the optical fiber is inserted into an inner hole of the ferrule, so that the optical fiber can be fixed and supported. Therefore, the ferrule is generally made of a ceramic material, and the inner hole is formed at the center thereof.
  • An outer diameter of the ferrule is about 2.5 nm, and a diameter of the inner hole into which the optical fiber is inserted is about 0.125 mm.
  • the ferrule is a highly-accurate part, of which accuracy is required to be 1 micrometer or less.
  • the ferrule needs to have the inner hole into which the optical fiber is inserted along a central axis thereof. Etching is performed to form a fine-diameter hole that is the inner hole.
  • the diameter of the inner hole of the ferrule needs to be a sum of a diameter of the to- be-inserted optical fiber and a predetermined margin. Generally, by taking into consideration a tolerance of ⁇ 4 ⁇ m, the diameter of the inner hole needs to be about 0.125 mm. As the diameter of the optical fiber is reduced, the diameter of the inner hole is reduced. Therefore, the process for etching the inner hole has become more difficult task, and a ratio of detective products has been increased.
  • Korean Patent Application Publication No. 10-1996-014983 disclosed in an inner diameter machining apparatus for an optical connector ferrule and a method therefor.
  • the invention relates to an inner diameter machining apparatus for an optical connector ferrule and a method therefor, capable of improving an machining accuracy for a ferrule that is an important member for connection of optical fibers in optical communication and reducing production cost thereof.
  • a semi-processed ferrule is pressed and fixed to a fixing member which is designed to slide by a motor and a ball screw, and an inner diameter is formed by rotating the ferrule in a normal direction and the inverse direction and moving the ferrule along a slanted surface of a wire penetrating a hollow portion thereof.
  • a tension exerted to the wire is suitably maintained by changing the moving direction of the fixing member and restoring the operation thereof.
  • the inner-diameter machining apparatus and the like according to the aforementioned methods are complicated in structure or highly expensive.
  • the inner hole of the ferrule cannot be accurately formed by the apparatuses. [Disclosure]
  • the present invention provides a method of manufacturing a ferrule, wherein an inner hole is formed by using optical fibers.
  • the present invention also provides a method of manufacturing a ferrule, wherein a fine-diameter inner hole can be accurately formed.
  • the present invention also provides a ferrule manufactured according to the method.
  • a ferrule having an inner hole having a diameter into which an optical fiber is to be inserted, the ferrule comprising: a hole- formation portion where the inner hole is formed at a center thereof by continuously connecting a plurality of optical fibers; and a main body which is disposed to surround an outer circumferential surface of the hole-formation portion to support the hole-formation portion, wherein the diameter of the inner hole is the same as that of one optical fiber.
  • a method of manufacturing a ferrule comprising steps of: (a) disposing a hole-formation optical fiber in a central axis; (b) continuously connecting a plurality of optical fibers along an outer circumferential surface of the hole-formation optical fiber; (c) forming a hole-formation portion by fixing the continuously-connected optical fibers by using a fixing member; (d) forming a main body by coating the outer circumferential surface of the hole-formation portion with a material of supporting the hole-formation portion; and (e) after the main body is formed, forming an inner hole into which an optical fiber is to be inserted along the inner circumferential surface of the hole-formation portion by removing the hole-formation optical fiber .
  • FIG. 1 (a) and (b) are transverse and longitudinal cross-sectional views of an optical fiber 10
  • FIG. 1 (c) is a schematic perspective view illustrating layers of the optical fiber.
  • FIG. 2 is a view sequentially illustrating processes of a method of manufacturing a ferrule using an optical fiber according to an embodiment of the present invention.
  • FIG. 3 (a) and (b) are perspective and cross- sectional views illustrating a ferrule manufactured according to an embodiment of the present invention. [Best Mode]
  • FIG. 2 is a view sequentially illustrating processes of a method of manufacturing a ferrule using an optical fiber according to an embodiment of the present invention.
  • FIG. 3 (a) and (b) are perspective and cross-sectional views illustrating a ferrule manufactured according to the embodiment of the present invention.
  • a hole-formation optical fiber 200 is disposed as a central axis.
  • a plurality of optical fibers 411, 412, 413, 414, 415, and 416 are disposed continuously along an outer surface of the hole-formation optical fiber 200.
  • the optical fibers are fixed by using a predetermined fixing member to form a hole-formation portion 410.
  • the fixing member may be an adhesive.
  • a main body 420 is formed by coating an outer surface of the hole- formation portion with a material for supporting the hole-formation portion.
  • the main body 420 may be made of an epoxy, an engineering plastic, a synthetic rubber, PVC, or any other materials that are used as a ferrule in the pertinent art.
  • the hole- formation optical fiber 200 used as the central axis is removed, so that the inner hole 400 is formed along the direction of the central axis in the inner portion of the hole-formation portion. Since the inner hole 400 is formed by removing the hole- formation optical fiber 200, a diameter of the inner hole is equal to that of the hole-formation optical fiber .
  • a ferrule 40 manufactured according to the aforementioned processes includes the hole-formation portion 410 having the inner hole 400 and a plurality of the optical fibers 411, 412, 413, 414, 415, and 416 and the main body 420.
  • the hole-formation portion 410 is formed by continuously disposing the plurality of optical fibers 411, 412, 413, 414, 415, and 416. An inner circumferential surface of the hole-formation portion 410 becomes the surface of the inner hole 400.
  • the diameter of the inner hole 400 where the optical fibers are formed are designed to be the same as that of one optical fiber by adjusting the number of optical fibers constituting the hole- formation portion. Therefore, the number of optical fibers constituting the hole-formation portion is determined in such a range that the diameter of the inner hole is the same as that of one optical fiber. In a case where the diameters of the hole-formation optical fibers are the same as the diameter of the optical fiber of the hole-formation portion in the manufacturing process, the number of optical fibers of the hole-formation portion is 6 as shown in FIG. 3.
  • the main body 40 is formed by coating an arbitrary material on an outer circumferential surface of the hole-formation portion.
  • the material for the main body may be an epoxy, an engineering plastic, a synthetic rubber, PVC, or the like.
  • any material that can be used for a ferrule in the related art can be used for the main body.
  • the main body has functions of protecting the optical fiber therein, supporting the hole-formation portion, and providing a predetermined volume to the ferrule .
  • a method of fixing optical fibers constituting a hole-formation portion or a material for a main body can modified in various manners in order to improve performance of a ferrule.
  • the exemplary embodiments should be considered in descriptive sense only and not for purposes of limitation.
  • a ferrule and a method of manufacturing a ferrule according to the present invention can be widely used in the optical communication field using optical fibers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

L'invention porte sur un procédé de fabrication d'une ferrule de connecteur optique et sur une ferrule fabriquée selon ce procédé. Le procédé de fabrication de l'invention consiste à: (a) disposer une fibre optique de formation de trou dans un axe central; (b) relier de manière continue une pluralité de fibres optiques le long de la surface circonférentielle externe de la fibre optique de formation de trou; (c) former une partie de formation de trou en fixant les fibres optiques reliées de manière continue à l'aide d'un élément de fixation; (d) former un corps principal en enrobant la surface circonférentielle externe de la partie de formation de trou d'un matériau permettant de soutenir la partie de formation de trou; et (e) après la formation du corps principal, former, en enlevant la fibre optique de formation de trou, un trou interne dans lequel une fibre optique sera insérée le long de la surface circonférentielle interne de la partie de formation de trou. Le procédé de fabrication de ferrule de l'invention permet de former avec précision un trou interne de petit diamètre en utilisant uniquement les fibres optiques, sans nécessité d'un processus de polissage séparé.
PCT/KR2008/001899 2007-04-11 2008-04-04 Ferrule et procédé permettant de fabriquer une ferrule en formant un trou interne au moyen d'une fibre optique WO2008127001A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2007-0035695 2007-04-11
KR20070035695 2007-04-11
KR10-2008-0031243 2008-04-03
KR1020080031243A KR100958446B1 (ko) 2007-04-11 2008-04-03 광섬유를 이용하여 내부홀을 형성하는 페룰 제조 방법 및페룰

Publications (1)

Publication Number Publication Date
WO2008127001A1 true WO2008127001A1 (fr) 2008-10-23

Family

ID=39864066

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2008/001899 WO2008127001A1 (fr) 2007-04-11 2008-04-04 Ferrule et procédé permettant de fabriquer une ferrule en formant un trou interne au moyen d'une fibre optique

Country Status (1)

Country Link
WO (1) WO2008127001A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100282998B1 (ko) * 1996-03-08 2001-03-02 요시다 다다히로 광파이버 연결기용 페룰 및 그 제조방법
JP2002327290A (ja) * 2001-05-01 2002-11-15 Hikari Tekku Kk 光ファイバ用多心フェルールの製造方法
KR20030035885A (ko) * 2001-10-23 2003-05-09 가부시키가이샤 액트원 수지제 광 섬유 페룰 및 그 성형방법
JP2003195102A (ja) * 2001-12-26 2003-07-09 Shibata:Kk 光ファイバ付フェルールとその製造方法
JP2003279796A (ja) * 2002-03-25 2003-10-02 Nippon Ceramic Co Ltd フェルールの製造方法
JP2004124216A (ja) * 2002-10-04 2004-04-22 Smk Corp フェルールの製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100282998B1 (ko) * 1996-03-08 2001-03-02 요시다 다다히로 광파이버 연결기용 페룰 및 그 제조방법
JP2002327290A (ja) * 2001-05-01 2002-11-15 Hikari Tekku Kk 光ファイバ用多心フェルールの製造方法
KR20030035885A (ko) * 2001-10-23 2003-05-09 가부시키가이샤 액트원 수지제 광 섬유 페룰 및 그 성형방법
JP2003195102A (ja) * 2001-12-26 2003-07-09 Shibata:Kk 光ファイバ付フェルールとその製造方法
JP2003279796A (ja) * 2002-03-25 2003-10-02 Nippon Ceramic Co Ltd フェルールの製造方法
JP2004124216A (ja) * 2002-10-04 2004-04-22 Smk Corp フェルールの製造方法

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