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WO2000072069A1 - Ferrule pour un guide d'ondes optiques - Google Patents

Ferrule pour un guide d'ondes optiques Download PDF

Info

Publication number
WO2000072069A1
WO2000072069A1 PCT/EP2000/004536 EP0004536W WO0072069A1 WO 2000072069 A1 WO2000072069 A1 WO 2000072069A1 EP 0004536 W EP0004536 W EP 0004536W WO 0072069 A1 WO0072069 A1 WO 0072069A1
Authority
WO
WIPO (PCT)
Prior art keywords
ferrule
optical waveguide
crimping
blank
protective jacket
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2000/004536
Other languages
German (de)
English (en)
Inventor
Jürgen Bauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TE Connectivity Solutions GmbH
Original Assignee
Tyco Electronics Logistics AG
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
Application filed by Tyco Electronics Logistics AG filed Critical Tyco Electronics Logistics AG
Publication of WO2000072069A1 publication Critical patent/WO2000072069A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
    • G02B6/3857—Crimping, i.e. involving plastic deformation
    • 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
    • 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
    • G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
    • 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
    • G02B6/3865—Details of mounting fibres in ferrules; Assembly methods; Manufacture fabricated by using moulding techniques

Definitions

  • Ferrule for an optical fiber method for producing such a ferrule and method for attaching a ferrule to an optical fiber
  • the present invention relates to a ferrule for an optical waveguide, a method for producing such a ferrule and a method for fastening a ferrule to an optical waveguide.
  • the ferrule must be attached to or on the optical waveguide in a tensile manner without damaging the optical waveguide or even influencing its optical properties.
  • Known fastenings on an optical waveguide establish a connection to it, for example by attaching a crimp connection to the optical waveguide.
  • the optical waveguide will be damaged or the optical properties will be adversely affected.
  • fine ribs are formed on the inner surface, ie the contact surface with the optical waveguide, of the ferrule, mostly in the form of a very fine internal thread with a very small diameter.
  • optical damping should not occur, if possible, and production using the method should allow short cycle times and cause low costs.
  • a ferrule according to the invention for an optical waveguide is characterized in that the ferrule is fastened to a protective jacket of the optical fiber by means of crimping, and in that the ferrule is at least partially produced from a metal powder.
  • the method according to the invention for fastening the ferrule to an optical waveguide comprises the following steps:
  • the method according to the invention for producing the ferrule has the following steps:
  • the ferrule manufactured by metal powder injection molding replaces two previously used individual parts, namely the ferrule (rotating part) and a detent spring (stamped and bent part);
  • the ferrule according to the invention is highly corrosion-resistant, since no different metals (for the ferrule and the detent spring) are used;
  • the ferrule can be manufactured inexpensively using injection molding technology (without internal thread or the like); - Economical cable assembly and manufacture of the ferrule by crimping;
  • a ferrule according to the invention for an optical waveguide, the method according to the invention for producing the ferrule and the method for fastening the ferrule to an optical waveguide are shown in the drawings.
  • Figure 1 is a cross-sectional view of an optical fiber with a ferrule aufecri pten in longitudinal section.
  • FIG. 2 shows a perspective view of the ferrule according to FIG. 1;
  • FIG. 3 shows a side view of the ferrule according to the invention
  • FIG. 4 shows a cross-sectional view of the ferrule according to FIG. 3;
  • FIG. 5 shows an end view of the ferrule according to FIG. 3;
  • a ferrule 4 according to the invention is arranged on an optical waveguide 1, which is made of a plastic material.
  • the ferrule 4 is made from a metal powder, preferably in conjunction with a plastic-based binder.
  • the optical waveguide 1 has a light-conducting core and a protective jacket 2, which protects the core from damage.
  • the ferrule 4 has at least one collar 7.
  • two detent springs 6 are formed in one piece on the ferrule 4. When the ferrule 4 is plugged in, these detent springs 6 serve as plug locks, which prevent the plug connection from slipping out or becoming detached.
  • FIG. 1 it can be seen in FIG. 1 how the ferrule 4 is crimped on the optical waveguide 1 in a region that is to the left of the detent springs 6 (in FIG. 1) using a crimping tool 3.
  • the crimping takes place between the protective jacket 2 of the optical waveguide 1 and the inner surface of the ferrule 4. It can easily be seen in FIG. 1 that the protective jacket 2 is compressed in the crimping area relative to the rest of the protective jacket 2.
  • FIG. 2 shows a perspective view of the ferrule 4.
  • the ferrule 4 is manufactured by means of an injection molding process.
  • the ferrule 4 according to the invention is produced by using a mixture of at least one metal powder and plastic (s) is used. This mixture is injected into a mold in an injection molding machine.
  • the brown part is then sintered in a sintering furnace and preferably densely sintered at a very high temperature and under a special gas atmosphere (e.g. hydrogen).
  • a special gas atmosphere e.g. hydrogen
  • the outer geometry i.e. the dimensions can be calibrated and cast webs etc. which are no longer required can be cut off if necessary.
  • the detent springs which are still sensitive after the injection molding process, can have such casting webs for support.
  • MIM Metal Injection Molding
  • the ferrule 4 has a cavity 8 which serves to receive the optical waveguide 1.
  • This cylindrical cavity 8 is shown idealized in FIG.
  • the ferrule 4 in one
  • the area in which the crimping takes place is formed with a surface that is as rough as possible and, moreover, is preferably conical, as is shown schematically in FIGS. 6 and 7.
  • a corresponding core 5 is used to form these features, namely a rough inner surface in the cavity 8 in a surface area 9 and a conical surface in this surface area 9.
  • the core 5 is provided with a rough surface in the conical area.
  • the crimping is then carried out with a wedge-shaped ground crimping tool 3 (see FIG. 6), which deforms the ferrule 4 in the surface area 9 such that the previously conical areas of the ferrule 4 after crimping run almost parallel to the (optical) axis of the optical waveguide 1.
  • This crimping section 10 preferably has a rough surface on the inside of the ferrule 4 in order to increase the frictional engagement.
  • the ferrule in the crimp area can be designed conically both inside and outside, so that a constant wall thickness results in this area. Then crimping can also be done with a straight crimping tool.
  • the optical waveguide 1 and the ferrule 4 are thus permanently and permanently connected to one another by means of this crimping.
  • the crimping takes place between the inner circumference of the ferrule 4 and the outer circumference of the protective jacket 2.
  • the pull-out force of the ferrule relative to the optical waveguide 1 is mainly determined by the quality of the frictional engagement.
  • the inner surface of the ferrule 4 in the cavity 8 in the crimping area is not smooth.
  • the end face of the optical waveguide 1 is shortened to the length of the ferrule 4 and finished.
  • the end face can be cut off, ground or smoothed with a laser.
  • the ferrule 4 according to the invention is designed as a metallic ferrule for an optical waveguide 1 made of plastic, which is produced by means of a metal powder injection molding process.
  • Manufactures protective sheath 2 is deliberately left rough to improve the properties of the crimp connection, in particular to increase the friction.
  • a roughened core 5 is used for this area in the injection molding process, the core 5 also having a conical shape, on the one hand to facilitate demolding and on the other hand to be able to deform these conical areas into almost parallel areas during crimping.
  • the preferably used metal powder binder system allows a certain ductility on the one hand and a certain elasticity of the ferrule 4 on the other hand.
  • the ductility comes into play when crimping, because the deformation should take place without any resetting, while the elasticity is important for the detent springs.
  • the crimp area can also be produced here by means of the MIM process (Metal Injection Molding), while the remaining area of the ferrule and the detent springs can be formed by injection molding with a plastic. This procedure would have the advantage that the required ductility for the crimping area could be achieved using the MIM method, while the required elasticity for the detent springs can be achieved more easily using the plastic used.
  • a ferrule for an optical waveguide according to the invention which is attached to a protective jacket of the optical waveguide by crimping, is characterized in that the ferrule consists at least partially of a metal powder and is produced by means of a metal powder injection molding process.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

L'invention concerne une ferrule pour un guide d'ondes optiques, un procédé pour produire une telle ferrule et un procédé pour fixer une ferrule sur un guide d'ondes optiques. La ferrule (4) selon l'invention, destinée à un guide d'ondes optiques (1), est fixée sur une gaine de protection (2) de ce dernier (1) par sertissage. L'invention est caractérisée en ce que cette ferrure (4) est réalisée au moins partiellement à partir d'une poudre métallique et produite selon un procédé de moulage par injection de poudres métalliques.
PCT/EP2000/004536 1999-05-21 2000-05-19 Ferrule pour un guide d'ondes optiques Ceased WO2000072069A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19923416.7 1999-05-21
DE1999123416 DE19923416C2 (de) 1999-05-21 1999-05-21 Ferrule für einen Lichtwellenleiter, Verfahren zum Herstellen einer solchen Ferrule und Verfahren zum Befestigen einer Ferrule an einem Lichtwellenleiter

Publications (1)

Publication Number Publication Date
WO2000072069A1 true WO2000072069A1 (fr) 2000-11-30

Family

ID=7908789

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/004536 Ceased WO2000072069A1 (fr) 1999-05-21 2000-05-19 Ferrule pour un guide d'ondes optiques

Country Status (2)

Country Link
DE (1) DE19923416C2 (fr)
WO (1) WO2000072069A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011117219A1 (fr) * 2010-03-25 2011-09-29 Cube Optics Ag Procédé de fabrication d'un passage pour un guide optique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004023722B4 (de) * 2004-05-11 2006-08-31 Tyco Electronics Amp Gmbh Steckverbindung für einen Lichtwellenleiter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60263909A (ja) * 1984-06-13 1985-12-27 Daido Steel Co Ltd 光フアイバコネクタにおける中子の製造方法
JPH01233407A (ja) * 1988-03-15 1989-09-19 Nec Corp 楕円貫通孔形光フアイバ接続用フエルール
US5305413A (en) * 1990-03-29 1994-04-19 Bt & D Technologies Limited Optical fibre feedthrough
US5408743A (en) * 1992-01-21 1995-04-25 Societe Nationale Industrielle Et Aerospatiale Process for connecting an electric cable having a light metal core to a standardized end element
EP0784219A1 (fr) * 1996-01-10 1997-07-16 R. Audemars Sa Ferrule pour connecteurs optiques
DE29709602U1 (de) * 1997-06-03 1997-07-31 HARTING KGaA, 32339 Espelkamp Faserendhülse für LWL-Polymerfasern
JPH09318841A (ja) * 1996-05-28 1997-12-12 Kel Corp 光ファイバ用コネクタ

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5131063A (en) * 1990-11-16 1992-07-14 Amp Incorporated Crimp and cleave assembly of an optical connector
DE4410444C2 (de) * 1994-03-25 1998-02-26 Framatome Connectors Int LWL-Stecker
DE19716638C1 (de) * 1997-04-21 1998-08-27 Harting Kgaa Verfahren zur Konfektionierung eines Polymer-Lichtwellenleiters mit einem Steckerstift

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60263909A (ja) * 1984-06-13 1985-12-27 Daido Steel Co Ltd 光フアイバコネクタにおける中子の製造方法
JPH01233407A (ja) * 1988-03-15 1989-09-19 Nec Corp 楕円貫通孔形光フアイバ接続用フエルール
US5305413A (en) * 1990-03-29 1994-04-19 Bt & D Technologies Limited Optical fibre feedthrough
US5408743A (en) * 1992-01-21 1995-04-25 Societe Nationale Industrielle Et Aerospatiale Process for connecting an electric cable having a light metal core to a standardized end element
EP0784219A1 (fr) * 1996-01-10 1997-07-16 R. Audemars Sa Ferrule pour connecteurs optiques
JPH09318841A (ja) * 1996-05-28 1997-12-12 Kel Corp 光ファイバ用コネクタ
US5926597A (en) * 1996-05-28 1999-07-20 Kel Corporation Connector for optical fiber
DE29709602U1 (de) * 1997-06-03 1997-07-31 HARTING KGaA, 32339 Espelkamp Faserendhülse für LWL-Polymerfasern

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
MERHAR J R: "OVERVIEW OF METAL INJECTION MOULDING", METAL POWDER REPORT,GB,MPR PUBLISHING SERVICES, SHREWSBURY, vol. 45, no. 5, 1990, pages 339 - 342, XP000650975, ISSN: 0026-0657 *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 147 (P - 460) 29 May 1986 (1986-05-29) *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 557 (P - 974) 12 December 1989 (1989-12-12) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011117219A1 (fr) * 2010-03-25 2011-09-29 Cube Optics Ag Procédé de fabrication d'un passage pour un guide optique
US9375787B2 (en) 2010-03-25 2016-06-28 Huber+Suhner Cube Optics Ag Method for producing a leadthrough for an optical conductor

Also Published As

Publication number Publication date
DE19923416A1 (de) 2001-02-01
DE19923416C2 (de) 2002-01-17

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