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WO1997001120A1 - Procede et dispositif de montage utile pour former un connecteur multibroches pour guides d'ondes lumineuses - Google Patents

Procede et dispositif de montage utile pour former un connecteur multibroches pour guides d'ondes lumineuses Download PDF

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Publication number
WO1997001120A1
WO1997001120A1 PCT/EP1996/002685 EP9602685W WO9701120A1 WO 1997001120 A1 WO1997001120 A1 WO 1997001120A1 EP 9602685 W EP9602685 W EP 9602685W WO 9701120 A1 WO9701120 A1 WO 9701120A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibers
positioning device
coupling elements
mold
optical
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/EP1996/002685
Other languages
German (de)
English (en)
Inventor
Wolfgang Ehrfeld
Lutz Weber
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.)
Institut fuer Mikrotechnik Mainz GmbH
Original Assignee
Institut fuer Mikrotechnik Mainz GmbH
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 Institut fuer Mikrotechnik Mainz GmbH filed Critical Institut fuer Mikrotechnik Mainz GmbH
Priority to AU11929/97A priority Critical patent/AU1192997A/en
Publication of WO1997001120A1 publication Critical patent/WO1997001120A1/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
    • G02B6/3834—Means for centering or aligning the light guide within the ferrule
    • G02B6/3838—Means for centering or aligning the light guide within the ferrule using grooves for light guides
    • G02B6/3839—Means for centering or aligning the light guide within the ferrule using grooves for light guides for a plurality of 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
    • G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
    • G02B6/3885—Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type

Definitions

  • the invention relates to a device and a method for producing a multiple plug connector for optical waveguides and to a multiple plug connector for optical waveguides produced by means of the device or by the method.
  • a fiber holder is known from the magazine "Laser Focus World", January 1993, page 165 ff., In which up to 18 fibers are guided between two silicon plates, each of which has a field of parallel, V-shaped grooves in the desired position The forces for holding the two parts together are exerted by an external clamp. Two guide bolts, also guided in such V-grooves, ensure the positioning of two such fiber holders relative to one another.
  • the V-grooves are produced in silicon by anisotropic etching.
  • a multiple fiber holder is known from the magazine "Polymer Engineering and Science", 1989, Volume 29, No. 17, page 1193 ff., In which the individual fibers of a band are inserted into a strain relief part, which in a second Part is attached, the fiber ends are inserted into holes in the end face of the second part. These have a diameter which allows the largest possible fiber diameter to be taken up and have a spacing which corresponds to the grid dimension of the fiber sliver. The fibers are then glued in the fiber holder. The end face, including the fiber ends, is then polished in order to achieve the required values for insertion and return loss.
  • DE 43 13 185 A1 discloses a mold for simultaneously casting a plurality of sleeves on a corresponding number of optical fibers.
  • each individual fiber is provided with a sleeve, a so-called ferrule, which can be used for handling and positioning the fiber, for example in a plug.
  • the fiber is positioned in the rotationally symmetrical cavity of the mold provided for the production of the sleeve by means of bores which are coaxial with the cavity. Consequently, only individual fibers can be provided with sleeves with this device, but not fiber bundles. Elastic positioning elements are also not provided. Due to the fixation of the optical fiber in bores, the known shape cannot achieve sufficient accuracy for single-mode optical fibers.
  • the fundamental technical problem with connectors for optical fibers is that the fibers to be connected must face each other as precisely as possible at the end, that is to say they have the least possible deviation from one another in the transverse direction of the fiber.
  • the fibers must be arranged axially parallel to each other as much as possible.
  • the required accuracy is in the region of approximately 1 ⁇ m.
  • the connectors discussed above ensure such precise positioning of the fiber ends relative to one another essentially in that the connector itself has guiding or positioning structures that are manufactured with corresponding accuracy. If each connector contains these positioning devices, which are usually manufactured using microtechnology, the unit price of such a connector is very high.
  • the capacity of a possible series production is also limited by the fact that each individual connector is manufactured using microtechnology and used in confectionery. tioning a complex assembly process must be carried out.
  • the relative position of the fibers and the coupling elements to one another can be determined with an accuracy that is required for the coupling elements to work properly when producing connecting pieces for optical fibers with multiple fibers.
  • the manufacturing accuracy is thus determined by the positioning device for the fibers and the coupling elements, whereas in the previously known connecting pieces for optical waveguides the manufacturing accuracy had to be applied by the base body of the connecting pieces themselves.
  • the device comprises a mold with a cavity for casting the base body
  • the fibers and the coupling elements can be poured into the base body of a connecting piece in a simple manner.
  • Particularly good values for the accuracy result if the positioning device is assigned to the side of the mold that delimits the contact area is. In this case, demolding without contamination or damage to the positioning device is possible if it is arranged outside the cavity. It is also advantageous if the shape is at least in two parts because good results can be achieved during casting.
  • the accuracy of the relative position of fibers and coupling elements is promoted if the positioning device is at least in two parts, a separation point being provided in the plane of the optical fibers and essentially at right angles to the contact area.
  • the positioning device With such a positioning device, at least the fibers, but also the coupling elements, can be held resiliently and non-positively and thus centered in the positioning device, so that they cannot move out of their intended position when the base body of the connecting element is being shaped. It is possible to adjust the position of the fiber ends relative to the shape with which the base body is formed if the positioning device can be moved relative to the shape at least in the plane of the contact area.
  • the device can preferably be used if the fibers are optical fibers of the singlemode type, optical fibers of the multimode type, electrical conductors or also hollow capillaries with an essentially round cross section.
  • the method for producing multiple plug-in connectors for optical waveguides provides for the position of the fibers and the coupling elements to be secured relative to one another by means of a positioning device which does not remain in the base body with the fibers and the coupling elements, there need not be one high-precision positioning device can be produced for each individual connector, but a positioning device that has been manufactured once can be used several times in the context of a series production process. Since the production of such precise positioning devices is associated with considerable effort and costs, the method according to the invention is advantageous for series production.
  • a ceramic or metallic insert is used.
  • the material of the insert can be selected with regard to particularly good properties with regard to temperature and climate stability.
  • the amount of potting compound required to fix the fibers is thereby kept particularly low and the advantages of ceramic or metal materials are particularly evident.
  • This insert can also be used to grasp the fibers before casting. It then also causes the fibers to be pre-positioned. In the drawing, an embodiment of the invention is shown.
  • Figure 1 A device according to the invention, partially in cross section from the side;
  • FIG. 2 the hollow shape according to FIG. 1 in a view of the end face which forms the contact area of the plug connector;
  • FIG. 3 a preferred exemplary embodiment for the method according to the invention for producing a multiple connector using five method steps
  • FIG. 4 five different possible structures for positioning devices that can be used in the device according to the invention.
  • FIG. 5 a connector, which is produced with the method according to the invention and with the device according to the invention, in a plan view of the level of the contact area.
  • the hollow mold 1 shows a device according to the invention in a side view, a hollow mold 1 being shown in cross section.
  • the hollow mold 1 comprises a lower mold part 2, an upper mold part 3 and a filling opening 4 machined into the upper mold part.
  • the hollow mold 1 is arranged on a fixed base 5.
  • a two-part holder 6 is arranged to the right of the hollow mold 1, which in turn is fastened on a mounting table 7 which can move in all three spatial directions.
  • An optical waveguide 8 is fixed in the holder 6 and contains a number of fibers 9 of the optical waveguide in a sheath 10.
  • the recess 15, adjacent to the holder 6, is designed in cross section so that it can receive the optical waveguide 8 together with its cladding 10.
  • the cross section is designed such that when the hollow mold 1 is closed, the recess 15 is essentially closed by the optical waveguide 8.
  • the recess 16 is adjacent to the positioning device 12 and is set up in such a way that it can accommodate the individual fibers 9 of the optical waveguide 8 at the intended spacing from one another, that is to say, for example, with a pitch of 250 ⁇ m from fiber to fiber.
  • the dowel pins 14 are guided in the area of the recess 16 from the inside of the hollow mold 1 to the outside, so that they can be fixed in the positioning device 12 and in the positioning device 13.
  • the recess 16 is stalt that the fibers 9 and the dowel pins 14 are in the intended position, but that they have some play in the recess.
  • the final and exact fixing of the fibers 9 and the dowel pins 14 relative to one another is carried out by the positioning devices 12 and 13.
  • These positioning devices 12 and 13 are constructed essentially the same and fix the fibers 9 and dowel pins 14 with the required accuracy, ie in the case of single -Mode fibers with an accuracy of around 1 ⁇ m, as well as with the required axis-parallel alignment to each other.
  • the assembly tables 7 and 11 can move the holder 6 on the one hand and the positioning devices 12 and 13 on the other hand into the intended position relative to the hollow mold 1.
  • FIG. 2 shows the hollow mold 1 with its lower part 2 and the upper part 3, the filling opening 4, the fibers 9, the dowel pins 14 and the recess 15 in a cross section, the viewing direction running in the longitudinal direction of the fibers 9 .
  • the bottom 20 of the lower mold part 2 rises approximately pyramid-shaped from the outer sides to the center, the bottom 20 not tapering to a point, but in the middle with vertical walls and a flat surface a kind of base 21 is formed.
  • the upper part of the mold has a corresponding design running parallel to the base 20 on the upper side of the mold interior, which essentially corresponds to the negative shape of the base 20 and the base 21.
  • the optical waveguide 8 which is placed on one side over a length that corresponds approximately to the length of the dowel pins 14, is placed on the lower mold part 2 of the hollow mold 1.
  • the covered area of the light waveguide 8 is placed on the holder 6, while the fibers 9 freed from the cover are introduced into the positioning devices 12 and 13 or placed there.
  • the dowel pins 14 are then also introduced into the positioning devices 12 and 13 parallel to the fibers 9, so that they lie in one plane with the fibers 9.
  • the holder 6 is then closed around the optical waveguide 8 and the hollow mold 1 is joined by placing the upper mold part 3 in order to enclose a mold interior that corresponds to the geometric shape of the subsequent connector. Any deviation of the optical waveguide 8, the fibers 9 or the dowel pins 14 from the desired position can be eliminated at this time by moving the assembly tables 7 or 11.
  • the hollow mold 1 is closed, the optical waveguide 8, the fibers 9 and the dowel pins 14 are fixed in their desired position.
  • the interior of the hollow mold 1 is then filled with a casting compound, symbolically indicated at 30, so that the basic body of the plug connector, which surrounds the optical waveguide 8, the fibers 9 and the dowel pins 14, is formed in the mold interior of the hollow mold 1.
  • the potting compound 30 has solidified or hardened within the hollow mold 1, the upper mold part 3 can be lifted off the basic body of the plug connector formed, and in e) the plug connector is demolded from the lower mold part 2.
  • the dowel pins 14 have been treated with a release agent before casting and can now, after the men of the connector, are pulled out of the base body 31. This results in cylindrical cavities in the base body 31, into which corresponding coupling elements can be introduced, the alignment and positioning of which satisfy the accuracy described above.
  • FIG. 4 shows various positioning devices 12 which can be used to fix the fibers 9 of an optical waveguide 8.
  • a first, two-part positioning device 30 with an upper part 31 and a lower part 32 has V-shaped grooves into which the fibers 9 can be inserted.
  • the upper part 31 and the lower part 32 are constructed essentially the same and are used facing V-shaped grooves.
  • the fibers 9 are clamped into the spaces formed between the grooves, the clamping force being applied by the elastic deformation of the material of the positioning device 12 itself.
  • a second positioning device 12 is made in one piece and has a comb-like structure 40 which is provided with tines 41.
  • the tines 41 have an arc in their course, two tines being arranged in pairs in such a way that the arcs point away from one another and form a space between them in the radius suitable for receiving the fibers 9.
  • the respective pair of tines is chamfered so that an insertion bevel for the respective fiber 9 is formed.
  • the clamping force required for the exact positioning of the fiber 9 between two tines 41 is required, is applied by the spring elasticity of the tines.
  • a further, two-part clamping structure 50 likewise has the interstices, which are required for the clamping of the optical fibers 9, through mutually facing, V-shaped cutouts.
  • each fiber 9 is enclosed in a V-shape on all sides, similar to the device 30, but the spring force is applied in the transverse direction by the plate-shaped spring elements 51 arranged in the front view due to their spring elasticity.
  • a two-part positioning device 60 can be compared in terms of its geometric arrangement to the positioning device 30, but the spring elements 61 surrounding the fiber are not solid, but thin-walled with an inner hollow chamber 62, the walls of which in turn are spherically deformed under pressure. This deformation results in the elasticity required for the individual fibers 9 to be held firmly but without damage.
  • a one-piece positioning device 70 shows an embodiment which surrounds the fibers 9 on all sides, but which nevertheless has a certain elasticity in the transverse direction of FIG.
  • FIG. 5 shows an end view of a plug connector 80, which was produced by means of the device according to FIG. 1 and FIG. 2 using the method according to FIG. 3.
  • the fibers 9 of the optical optical waveguide emerge from an end face 81.
  • two positioning openings 82 are formed on the end face, which are provided for inserting dowel pins serving as coupling elements are. Thanks to the positioning device 12 of the device according to the invention, the relative position of the individual fibers 9 to one another and to the positioning openings 82 is defined with a high degree of accuracy, for example better than 1 ⁇ m absolute.
  • the positioning devices 12 and 13 are produced, for example using the structures illustrated in FIG. 4, by means of a highly precise microtechnology, for example by UV lithography or X-ray lithography with subsequent galvanic molding or by anisotropic Silicon etching.
  • the positioning device used in each case which is not arranged within the mold space of the hollow mold 1, but is used externally in the immediate vicinity of the hollow mold, is not affected by the actual molding process of the connector.
  • the microstructure used for the positioning of the fibers 9 and the dowel pins 14 or the positioning openings 82 produced therewith can therefore be used repeatedly, practically as often as desired, for producing a plug connector.
  • the device according to the invention is advantageous compared to the previously known connectors or devices for the production of connectors because only the optical waveguide 8 itself and the molding material 30 used for forming the base body 31 are used to produce the connector.
  • the microstructure is retained for further production steps, whereas previously a corresponding, elaborately manufactured and very precise microstructure had to remain in the connector for each connector.
  • the connector 80 shown in FIG. 5 has an extension 83 on its upper side which corresponds to the negative of the upper part 3.
  • a cavity which is complementary to this approach is on the underside of the connector 80, inwards molded, not visible in Figure 5. With this approach 83, a plurality of plug connectors can be arranged one above the other by pressing them onto each other.
  • the optical connection between two connectors takes place in a manner known per se in that two connectors 80 are pressed against one another with their end faces 81 together with two suitable dowel pins 14, for example using an emulsion gel, which adjusts the optical transition between two coaxially opposed ones Fibers 9 promotes. Because the position of the fibers 9 relative to the positioning openings 82 and thus also relative to the dowel pins 14 used together is very precisely defined with respect to the accuracy of the microstructures of the positioning devices 12 and 13, two fibers 9 to be coupled are each coaxial and axially parallel opposite, so that the attenuation of the optical transition remains small.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

Le dispositif décrit sert à fabriquer des connecteurs pour guides d'ondes lumineuses (8) à fibres multiples (9). Les connecteurs comprennent un corps de base avec une zone de contact (81) qui contient l'extrémité libre des fibres (9) et une zone de raccordement qui retient le guide d'ondes lumineuses (8). Des éléments de couplage, par exemple des trous (82) et des goupilles (14) de serrage, sont associés à la zone de contact. Au moins un élément de positionnement (12, 13) est prévu pour les fibres (9) et les éléments de couplage (14, 82).
PCT/EP1996/002685 1995-06-23 1996-06-20 Procede et dispositif de montage utile pour former un connecteur multibroches pour guides d'ondes lumineuses Ceased WO1997001120A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU11929/97A AU1192997A (en) 1995-06-23 1996-06-20 Process and mounting device for producing a multiple plug for light waveguides

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19522859.6 1995-06-23
DE1995122859 DE19522859A1 (de) 1995-06-23 1995-06-23 Verfahren und Montageeinrichtung zur Herstellung eines Mehrfach-Steckverbinders für Lichtwellenleiter

Publications (1)

Publication Number Publication Date
WO1997001120A1 true WO1997001120A1 (fr) 1997-01-09

Family

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Application Number Title Priority Date Filing Date
PCT/EP1996/002685 Ceased WO1997001120A1 (fr) 1995-06-23 1996-06-20 Procede et dispositif de montage utile pour former un connecteur multibroches pour guides d'ondes lumineuses

Country Status (3)

Country Link
AU (1) AU1192997A (fr)
DE (1) DE19522859A1 (fr)
WO (1) WO1997001120A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2348381A (en) * 1998-11-04 2000-10-04 Sartorius Gmbh Fluid distributor plates for filter casettes
AU2004285394B2 (en) * 2003-11-03 2009-01-08 Astrazeneca Ab Imidazo (1,2-A) pyridine derivatives for the treatment of silent gastro-esophageal reflux

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8979390B2 (en) * 2011-11-28 2015-03-17 International Business Machines Corporation Ferrule of multilayer waveguide connector

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514722A1 (fr) * 1991-05-13 1992-11-25 Nippon Telegraph And Telephone Corporation Fiche pour connecteur optique multi-fibres avece faibles pertes de réflexion et d'insertion
DE4313185A1 (de) * 1992-04-27 1993-10-28 Ericsson Telefon Ab L M Form zum Gießen von Hülsen
DE4322660A1 (de) * 1993-07-07 1995-01-19 Hirschmann Richard Gmbh Co Zentrierungsvorrichtung für faserförmige Lichtwellenleiter und Verfahren zur Herstellung derselben

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907852A (en) * 1988-02-05 1990-03-13 Tokai Rubber Industries, Ltd. Optical fiber connector and method for producing the same
IE892171A1 (en) * 1989-07-06 1991-01-16 Desbury Ltd A mould for a cable connector
US5414786A (en) * 1992-10-09 1995-05-09 The Furukawa Electric Co., Ltd. Optical waveguide component with a molded resin portion having accurately aligned guide pin holes therein

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0514722A1 (fr) * 1991-05-13 1992-11-25 Nippon Telegraph And Telephone Corporation Fiche pour connecteur optique multi-fibres avece faibles pertes de réflexion et d'insertion
DE4313185A1 (de) * 1992-04-27 1993-10-28 Ericsson Telefon Ab L M Form zum Gießen von Hülsen
DE4322660A1 (de) * 1993-07-07 1995-01-19 Hirschmann Richard Gmbh Co Zentrierungsvorrichtung für faserförmige Lichtwellenleiter und Verfahren zur Herstellung derselben

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
K.INADA ET AL.: "PLASTIC MOLDED SINGLE AND RIBBON TYPE OPTICAL FIBER CONNECTORS", POLYMER ENGINEERING AND SCIENCE, vol. 29, no. 17, September 1989 (1989-09-01), pages 1193 - 1196, XP002017049 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2348381A (en) * 1998-11-04 2000-10-04 Sartorius Gmbh Fluid distributor plates for filter casettes
GB2348381B (en) * 1998-11-04 2001-02-21 Sartorius Gmbh Distributor plate for crossflow cassette filtration apparatus
AU2004285394B2 (en) * 2003-11-03 2009-01-08 Astrazeneca Ab Imidazo (1,2-A) pyridine derivatives for the treatment of silent gastro-esophageal reflux

Also Published As

Publication number Publication date
AU1192997A (en) 1997-01-22
DE19522859A1 (de) 1997-01-02

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