EP1412793A1 - Unite de couplage optique et procede pour inserer des guides d'ondes optiques dans une unite de couplage optique - Google Patents

Unite de couplage optique et procede pour inserer des guides d'ondes optiques dans une unite de couplage optique

Info

Publication number
EP1412793A1
EP1412793A1 EP01969201A EP01969201A EP1412793A1 EP 1412793 A1 EP1412793 A1 EP 1412793A1 EP 01969201 A EP01969201 A EP 01969201A EP 01969201 A EP01969201 A EP 01969201A EP 1412793 A1 EP1412793 A1 EP 1412793A1
Authority
EP
European Patent Office
Prior art keywords
coupling unit
optical
coupling
receiving openings
plug element
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.)
Withdrawn
Application number
EP01969201A
Other languages
German (de)
English (en)
Inventor
Axel Beier
Hans-Dieter Weigel
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.)
Infineon Technologies AG
Original Assignee
Infineon Technologies 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 Infineon Technologies AG filed Critical Infineon Technologies AG
Publication of EP1412793A1 publication Critical patent/EP1412793A1/fr
Withdrawn legal-status Critical Current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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/421—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical component consisting of a short length of fibre, e.g. fibre stub
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4249—Packages, e.g. shape, construction, internal or external details comprising arrays of active devices and fibres
    • 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
    • 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
    • G02B6/3833—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
    • G02B6/3861—Adhesive bonding
    • 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
    • G02B6/3882—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using rods, pins or balls to align a pair of ferrule ends
    • 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
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4201—Packages, e.g. shape, construction, internal or external details
    • G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
    • G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4292—Coupling light guides with opto-electronic elements the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements

Definitions

  • Optical coupling unit and method for threading optical fibers into an optical coupling unit Optical coupling unit and method for threading optical fibers into an optical coupling unit.
  • the invention relates to a coupling unit for optically coupling a multichannel optical plug-in element with at least one opto-electronic converter of a multichannel transmitting and / or receiving unit and a method for threading optical fibers into such a coupling unit.
  • optical plug element in particular an optical plug with light-emitting or light-receiving opto-electronic converters
  • a separate optical coupling unit For coupling and connecting an optical plug element, in particular an optical plug with light-emitting or light-receiving opto-electronic converters, it is known to provide a separate optical coupling unit.
  • the high-frequency optical signals to be transmitted are conducted and guided in the opposite direction via the optical coupling unit from the optical connector to the opto-electronic converters.
  • Conventional coupling units of this type consist of a two-part carrier part, in which optical fibers (glass fibers) arranged in one plane are held in V-shaped grooves in one part. The optical fibers are pressed into the grooves by an additional slide, which is provided by the other part. The end faces are then polished and guide pins installed.
  • the known coupling unit has the disadvantage that the adjustment and fixation of the glass fibers by means of a slider can only be achieved by the highest accuracy of all dimensions, which involves a lot of effort and a high level of rejects. There are also acceptable positional tolerances between the V-shaped grooves for the optical fibers and holes for guide pins that are laterally on the V-shaped Grooves are arranged, difficult to reach. There are high injection mold costs due to complex measurements, tests and adjustments.
  • Another disadvantage is that relatively expensive pins with a ring boss are required as guide pins, which are introduced into bores for the guide pins with a shape undercut. Overall, there is thus a relatively complicated assembly of the known coupling unit, which requires a high level of assembly effort.
  • the present invention has for its object to provide an optical coupling unit and a method for threading optical fibers into such an optical coupling unit, which ' in a simple manner the manufacture of the coupling unit and the threading of optical fibers into the Enable coupling unit.
  • the coupling unit is formed in one piece, the receiving openings for optical waveguides to be inserted into the coupling unit running at least partially in the interior of the coupling unit.
  • the coupling unit only a single part is therefore used as the coupling unit.
  • both the receiving openings for the optical waveguides and longitudinal bores for receiving and positioning guide pins are formed, with which the coupling unit can be aligned with other elements, in particular an optical connector.
  • the manufacture of the coupling unit as a part eliminates all the problems associated with the use of a slide for introducing the optical waveguides in the prior art. In particular, no force-controlled assembly is required and does not exist
  • Another advantage of the solution according to the invention is that the receiving openings for the optical waveguides are surrounded on all sides by the same material thicknesses, so that there is a compact, closed and protected arrangement.
  • the coupling unit has on its upper or lower side a preferably centrally arranged recess which partially exposes the receiving openings for the optical waveguides. Via the recess, it is possible to insert an adhesive into the coupling unit for gluing the optical fibers in the receiving openings.
  • the coupling unit is associated with an auxiliary auxiliary steeply with a knob protruding from an essentially flat surface.
  • the coupling unit can be arranged on the auxiliary part in such a way that the knobs protrude into the recess of the coupling unit and adjoin the openings for receiving the optical waveguides.
  • the additional auxiliary steep serves as a threading aid and holds when threading
  • the coupling unit preferably has means for receiving and latching guide pins (also referred to as guide pins or centering pins). These are advantageously two longitudinal bores, which each run to the side of the receiving openings for the optical waveguides and have a constriction, each of which serves to lock a guide pin.
  • the associated guide pin is preferably provided with an annular groove, which snaps into the constriction of the longitudinal bore.
  • guide pins with an annular groove has the advantage of a simpler and more cost-effective production process compared to the previous use of guide pins with thickenings.
  • the guide pins are preferred with centerless ones
  • the guide pin is moved axially between two counter-rotating discs.
  • This method also has the advantage that guide pins with low surface roughness can be produced.
  • a smooth surface of the guide pins advantageously reduces wear on the coupling partner.
  • the first coupling side of the coupling unit has the same basic dimensions as the optical plug element to be coupled, in particular receiving openings of the optical plug element being aligned with the receiving openings for the optical waveguides of the coupling unit.
  • the second coupling side of the coupling unit preferably has a protruded projection that exposes the receiving openings. This is done via the coupling side End faces of optical fibers, which are introduced into the receiving openings, a beam deflection between the optical fibers and assigned optically active surfaces of the opto-electronic converters.
  • the optical coupling unit preferably consists of the same material as the optical plug element to be coupled.
  • the optical coupling unit is made of the same material as the optical fiber end piece of the optical waveguide
  • Plug element (generally referred to as "ferrule").
  • the adaptation of the material provides an equal coefficient of expansion in the event of temperature changes, so that the quality of the coupling between the coupling unit and the optical plug element is not influenced by temperature changes.
  • the receiving openings in the coupling unit for the optical fibers are preferably designed as high-precision bores. It can be provided that the bores are circular in cross section.
  • the method according to the invention is characterized by the steps: a) providing a multichannel optical plug element with receiving openings for optical waveguides arranged in one plane, b) arranging the multichannel optical plug element on the first coupling side of the coupling unit in such a way that the receiving openings of the optical plug element with the receiving openings of the coupling unit are aligned, c) threading at least one optical waveguide first into the optical plug-in element and further into the coupling unit, and d) gluing the optical waveguides into the receiving openings of the coupling unit.
  • the coupling unit preferably has a recess for introducing adhesive and is placed on an additional auxiliary part with a protruding stud during the threading process in such a way that the optical fibers to be threaded are prevented by the protruding studs from leaving the receiving openings in the region of the recess.
  • the auxiliary part provides a kind of threading aid, which ensures the threading process also in the area of the recess of the coupling unit and facilitates the assembly of the glass fibers.
  • the optical fibers are chamfered on the second coupling side of the coupling unit in such a way that their end faces direct a beam by 90 ° between the optical fibers and optically active zones of opto-electronic converters of a transmitting and / or receiving unit.
  • a standard MT ferrule is preferably used as the multi-channel optical plug-in element, since this means that existing ferrules are used
  • Parts and geometries can be used.
  • optical connector element any optical multi-fiber connector or an analog connector can be used as the optical connector element
  • Auxiliary part can be used.
  • Figure 1 is a perspective view of a coupling unit according to the invention
  • Figure 2a is another perspective view of the coupling unit of Figure 1, with guide pins being inserted into the coupling unit; • Figure 2b is a perspective view of the
  • Figure 3 is a perspective view of a
  • Coupling unit a threading aid, an optical plug and an optical cable before threading glass fibers into the coupling unit;
  • FIG. 4 shows the elements of FIG. 3 coupled to one another when the glass fibers are threaded
  • Figure 5 is a sectional view of the arrangement of Figures 4 and
  • Figure 6 is a perspective view of an optical element
  • FIG. 1 shows an exemplary embodiment of a coupling unit 1 for connecting and conducting high-frequency optical signals carried in optical fibers between an optical connector and at least one optoelectronic converter or vice versa.
  • the coupling unit 1 consists of a one-piece molded plastic body, which is produced, for example, by injection molding.
  • the coupling unit has an upper side la, a lower side lb, two lateral side surfaces lc, ld and one on the left in FIG. 1
  • the first coupling side le is used for coupling with an optical connector and the second coupling side lf for optical coupling with optoelectronic converters of a transmitting and / or receiving unit.
  • the coupling unit forms a chamfered projection 20 that exposes the receiving openings 2, while the first coupling side is ground flat.
  • the bores are produced, for example, in the manufacture of the coupling unit by thin wires inserted into an injection mold.
  • the coupling unit 1 has longitudinal bores 3, into which guide pins or guide pins are inserted according to FIGS. 2a and 2b, which serve to align the coupling unit 1 and the receiving openings 2 or optical fibers arranged therein with respect to an optical plug or other coupling partner ,
  • two lateral recesses 4 extend vertically in the direction of the bores 3, which have at one end, with the formation of two edges 41, a tapered, narrower region 42 in which the wall of the recess 4 has a kind of thickening 43 ( see FIG. 2b).
  • the guide pins 5 to be inserted into the bores 3 each have an annular groove 51, which at
  • a central recess 6 is provided on one side lb of the coupling unit 1, which serves to receive adhesive after insertion of optical fibers into the receiving openings 2 and thereby firmly glue the optical fibers in the coupling unit 1.
  • the recess 6 extends into the area of the receiving openings 2 for the optical waveguides.
  • Figure 3 shows that for threading several optical fibers of an optical cable into one
  • Coupling unit 1 required elements. In addition to the optical cable 7, a large number of
  • optical waveguides 71, the coupling unit 1 described in FIGS. 1 to 3 and a virgin optical connector 8 and a threading aid 9 designed as a separate part are provided.
  • the optical connector 8 is preferably a standard connector, for example a standard MT ferrule for accommodating twelve optical fibers.
  • the coupling unit 8 has, in a manner known per se, a housing 81, two guide pins 82 guided in longitudinal bores, a rear sheet metal holding element 83 for holding and fixing the guide pins 82 and receiving openings 85 for receiving the optical fibers 71 of the optical cable 7.
  • a cutout 84 for an adhesive potting for the glass fibers 71 is also provided. In the present case, however, this cutout 84 is not filled with adhesive.
  • the coupling unit 8 serves only as a threading aid for the coupling unit 1 and not for fastening the optical waveguide 71.
  • the centering aid 9 has, on an upper, flat surface 91, a protruding knob 92 which has an upper surface 92a which is arranged parallel to the surface 91 and two angled surfaces 92b, 92c which are inclined in the direction of the surface 91.
  • FIGS. 4 and 5 show the element arrangement of FIG. 3 when the glass fibers 71 are threaded into the optical connector 8 and the coupling unit 1.
  • the coupling unit 1 is seated on the threading aid 9 in such a way that the protruding knob 92 of the threading aid 9 engages in the recess 6 of the coupling unit 1, approximately to the bottom of the recess in the coupling unit.
  • Plug 8 is first fastened by means of the guide pins 5 and 82 on the first coupling side le of the coupling unit. Due to the same basic dimensions and by means of the precisely aligned guide pins, coupling takes place in such a way that the receiving openings 85 of the optical connector 8 receiving the optical fibers 71 are aligned with the receiving openings 2 of the coupling unit 1.
  • Coupling unit 1 can be arranged. However, they are preferably provided on the coupling unit 1 and fastened there as described in relation to FIG. 2a. Thus, a secure locking is produced by a positive engagement of the coupling unit in the groove 51 of the guide pin 5.
  • the guide pin 5 can be produced in a simple manner by means of a centerless cylindrical grinding machine.
  • the guide pin 5 has a smooth surface, whereby the wear of the coupling partner is reduced.
  • the optical fibers 71 are through the receiving openings 85 of the optical connector 8 and then passed through the receiving openings 2 of the coupling unit 1.
  • the knob 92 engaging in the recess 6 of the coupling unit ensures that the optical fibers 71, which are glass fibers, are held down for the subsequent openings during the threading process.
  • optical fibers 71 After the optical fibers 71 have been threaded in, adhesive is poured into the recess 6 of the coupling unit 1, the optical fibers being fixed.
  • the optical plug 8 is now removed (for example after cutting the optical waveguide) and the end or coupling surfaces le, lf of the coupling unit 1 are polished. Then, as described with reference to FIG. 2b, the guide pins are attached, if not already done.
  • FIG. 6 shows all the essential elements of an arrangement with a finished coupling unit.
  • An optical connector 8 is coupled to the first coupling side le of the coupling unit 1. It is pointed out here that the optical connector 8, unlike in FIGS. 3 to 5, is a completely assembled connector with inserted optical fibers and a polished end face.
  • the optical connector 8 and the coupling unit 1 are made of the same material, so that the same coefficients of expansion are present when there is a change in temperature and thus improved coupling conditions.
  • a receiving or transmitting unit 10 is shown, which has an array of optical-electronic converters 11. These are mounted on a conventional carrier 12 and are electrically connected to a printed circuit board (not shown) by means of a bonding process. Due to the obliquely ground and polished end faces 71a of the glass fibers 71, the optical signals are deflected by 90 ° in a manner known per se and thus strike. the respectively assigned
  • Transducer 11 Such an arrangement is described, for example, in US Pat. No. 6,250,820.

Landscapes

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

Abstract

La présente invention concerne une unité de couplage (1) permettant le couplage optique d'un élément optique enfichable (8) à plusieurs canaux à au moins un transformateur optoélectronique (11) d'une unité d'émission et/ou de réception (10) à plusieurs canaux, ainsi qu'un procédé pour insérer des guides d'ondes optiques (71) dans une unité de couplage optique (1) de ce type. Ladite unité de couplage (1) comprend une première face de couplage (1e) conçue pour le couplage optique à l'élément optique enfichable à plusieurs canaux, une seconde face de couplage (1f), conçue pour le couplage optique à au moins un transformateur optoélectronique (11), ainsi qu'une pluralité d'ouvertures de réception (2) situées dans un plan, destinées aux guides d'ondes optiques (71) et s'étendant de la première face de couplage (1e) à la seconde face de couplage (1f). L'unité de couplage (1) selon cette invention est conçue sous forme d'une seule pièce. Lesdites ouvertures de réception (2) se trouvent au moins partiellement à l'intérieur de l'unité de couplage (1). L'insertion des guides d'ondes optiques (71) dans l'unité de couplage (1) monobloc est réalisée à l'aide d'un élément optique enfichable (8), les ouvertures de réception (85) de cet élément optique enfichable (8) s'alignant avec les ouvertures de réception (2) de l'unité de couplage (1).
EP01969201A 2001-08-01 2001-08-01 Unite de couplage optique et procede pour inserer des guides d'ondes optiques dans une unite de couplage optique Withdrawn EP1412793A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DE2001/002914 WO2003012511A1 (fr) 2001-08-01 2001-08-01 Unite de couplage optique et procede pour inserer des guides d'ondes optiques dans une unite de couplage optique

Publications (1)

Publication Number Publication Date
EP1412793A1 true EP1412793A1 (fr) 2004-04-28

Family

ID=5648273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01969201A Withdrawn EP1412793A1 (fr) 2001-08-01 2001-08-01 Unite de couplage optique et procede pour inserer des guides d'ondes optiques dans une unite de couplage optique

Country Status (3)

Country Link
US (1) US6939057B2 (fr)
EP (1) EP1412793A1 (fr)
WO (1) WO2003012511A1 (fr)

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JP2014182202A (ja) * 2013-03-18 2014-09-29 Fujitsu Ltd 電子機器および光コネクタ
US10228520B2 (en) 2016-08-30 2019-03-12 Corning Optical Communications LLC Fiber-to-waveguide optical interface devices and coupling devices with lenses for photonic systems
US10191216B2 (en) 2016-08-30 2019-01-29 Corning Optical Communications LLC Fiber-to-waveguide optical interface device and components for photonic systems
JP2019060978A (ja) * 2017-09-25 2019-04-18 株式会社エンプラス 光レセプタクルの製造方法およびそれに用いる金型

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Also Published As

Publication number Publication date
US20040247257A1 (en) 2004-12-09
WO2003012511A1 (fr) 2003-02-13
US6939057B2 (en) 2005-09-06

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