WO2014157363A1 - Module de transmission optique, module de transmission composite photoélectrique, et connecteur optique - Google Patents

Module de transmission optique, module de transmission composite photoélectrique, et connecteur optique Download PDF

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Publication number
WO2014157363A1
WO2014157363A1 PCT/JP2014/058588 JP2014058588W WO2014157363A1 WO 2014157363 A1 WO2014157363 A1 WO 2014157363A1 JP 2014058588 W JP2014058588 W JP 2014058588W WO 2014157363 A1 WO2014157363 A1 WO 2014157363A1
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WO
WIPO (PCT)
Prior art keywords
optical
waveguide
plug
base
hole
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Application number
PCT/JP2014/058588
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English (en)
Japanese (ja)
Inventor
松原　孝宏
直希 高橋
和美 中水流
Original Assignee
京セラ株式会社
京セラコネクタプロダクツ株式会社
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Application filed by 京セラ株式会社, 京セラコネクタプロダクツ株式会社 filed Critical 京セラ株式会社
Publication of WO2014157363A1 publication Critical patent/WO2014157363A1/fr

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    • 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
    • G02B6/43—Arrangements comprising a plurality of opto-electronic elements and associated optical interconnections
    • 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
    • G02B6/4274—Electrical aspects
    • G02B6/4284—Electrical aspects of optical modules with disconnectable electrical connectors

Definitions

  • the present invention relates to an optical transmission module, an optical composite transmission module, and an optical connector that connect optical transmission paths.
  • Patent Document 1 discloses a technique for connecting a waveguide base having an optical waveguide formed to a midplane.
  • the module in the structure in which the module (204) is connected to the connector on the midplane board (202) located on the back side of the server system or the like, for example, the module is inserted.
  • the connector is completely fixed so as not to move with respect to the midplane board, various disadvantages occur when the blade board is inserted into the connector.
  • the relative fixed position of the midplane board or each module in the system may vary. If the accuracy of the connector mounting position on the midplane board is low, or if the connector is not sufficiently inserted into the module, the module cannot be inserted into the connector or the connector or The module may buckle or break.
  • the connector and the module are inserted with a slight misalignment, a long-term load (stress) is applied to the connector or module, and the connector or connector mounting part (generally a soldering part), Furthermore, the module may be deformed or damaged, and the reliability may be lowered.
  • stress generally a soldering part
  • optical transmission module optical / electrical composite module
  • optical connector that can suitably perform optical connection between substrates or have excellent long-term reliability.
  • An optical transmission module is optically connected to a waveguide base having an optical waveguide provided on a main surface thereof, a connection base disposed with respect to the waveguide base, and the optical waveguide.
  • An optical fiber, an optical receptacle fixed to the waveguide base, and the optical fiber is held and fitted to the optical receptacle, and is fixed to the connection base with play with respect to the connection base.
  • an optical plug is provided.
  • An optical / electrical composite transmission module includes a wiring base provided with electrical wiring, a connection base provided with electrical wiring, a first electrical connector component fixed to the wiring base, and the connection A second electrical connector part fixed to the base and coupled to the first electrical connector part, thereby electrically connecting the wiring base and the connection base, and positioning the wiring base and the connection base; A waveguide base fixed on the wiring base and provided with an optical waveguide on a main surface; an optical fiber optically connected to the optical waveguide; an optical receptacle fixed to the waveguide base; An optical plug that holds the optical fiber, fits into the optical receptacle, and is fixed to the connection base in a state having play with respect to the connection base.
  • An optical connector is an optical connector that connects an optical transmission path between a waveguide substrate and a coupling substrate that are arranged to each other, and the optical connector provided on a main surface of the waveguide substrate.
  • An optical receptacle that can be fixed to the waveguide base body with the waveguide exposed, and an optical fiber connector part that can hold the optical fiber and can be movably attached to the connecting base body. Yes.
  • the long-term reliability of the optical receptacle or the optical plug can be improved.
  • FIG. 4A and 4B are perspective views of the optical plug of FIG. 3 with some members removed. It is the perspective view which looked at the optical plug of FIG. 3 from another angle.
  • 6A and 6B are cross-sectional views taken along line VIa-VIa in FIG. 5, and
  • FIG. 6C is a cross-sectional view taken along line VIc-VIc in FIG. 6B.
  • FIG. 7A is a perspective view showing the optical receptacle of the optical transmission module of FIG.
  • FIG. 7B is a perspective view of the optical receptacle with some members removed.
  • FIG. 8A is a perspective view showing the waveguide substrate on which the positioning member of FIG. 7B is placed, and FIG. 8B is a waveguide substrate on which the positioning member is not placed.
  • FIG. FIGS. 9A to 9D are views showing how the optical plug is inserted into the optical receptacle. It is a perspective view which shows the to-be-positioned member and positioning member in the state of FIG.9 (d).
  • Fig.11 (a) and FIG.11 (b) are schematic diagrams which show a modification. 12A is a cross-sectional view taken along line XIIa-XIIa in FIG. 9D, and FIG. 12B is a cross-sectional view taken along line XIIb-XIIb in FIG.
  • FIG. 1 is a perspective view showing an optical / electrical composite transmission module 1, an optical transmission module 3, and an optical connector 5 according to an embodiment of the present invention in a disconnected state.
  • FIG. 2 is a view of a part of FIG. 1 viewed in the z direction.
  • the opto-electric composite module including the opto-electric composite transmission module 1 is composed of a structure in which a plurality of substrate assemblies configured by providing electronic components and the like on a substrate are connected to each other. Signal transmission between the substrate assemblies is performed by electrical signals and optical signals.
  • a photoelectric composite module constitutes, for example, a computer system.
  • the photoelectric composite transmission module 1 indicates a configuration related to signal transmission in the photoelectric composite module.
  • the components are substantially the same as the components of the photoelectric composite module.
  • the optical transmission module 3 refers to the structure which concerns on transmission of an optical signal among the photoelectric composite transmission modules 1, the optical transmission module 3 may be defined including the structure which concerns on transmission of an electrical signal.
  • the term “optical transmission module 3” is mainly used.
  • the optical transmission module 3 includes a midplane assembly 7 and a plurality of blade assemblies 9 (only one is shown in FIG. 1) connected perpendicularly to the midplane assembly 7 as a substrate assembly.
  • the midplane assembly 7 and the blade assembly 9 are connected by an electrical connector 11 that connects electrical transmission paths and an optical connector 5 that connects optical transmission paths.
  • each part of the optical transmission module 3 may be appropriately set.
  • the length of one side of the midplane 21 or the blade assembly 9 is, for example, 5 cm or more and 20 cm. The following can be set.
  • the blade assembly 9 may be provided on both sides of the midplane 21, but in the description of the present embodiment, only the configuration relating to one surface will be described, and the configuration relating to the other surface will be omitted. It shall be.
  • the midplane assembly 7 is provided on the midplane 21, the main surface of the midplane 21, the electric plug 13 constituting the electric connector 11, and the optical plug provided on the main surface of the midplane 21 and constituting the optical connector 5. 17 and a plurality of optical cables 27 held by the optical plug 17.
  • the blade assembly 9 is provided on the blade 23, the waveguide substrate 25 fixed to the blade 23 in a stacked manner, the electrical receptacle 15 that is provided on the blade 23 and constitutes the electrical connector 11, and the waveguide substrate 25. And an optical receptacle 19 constituting the optical connector 5.
  • An optical waveguide band 29 (FIG. 1) connected to the optical cable 27 is provided on the waveguide substrate 25.
  • the blade 23 is mounted with an electronic component such as an IC (including a photoelectric conversion element).
  • An electronic component such as an IC may also be mounted on the midplane 21 and the waveguide substrate 25.
  • the light emitting element 101 and the light receiving element 103 may be provided on any of the midplane 21, the blade 23, and the waveguide substrate 25.
  • the midplane 21 and the blade 23 are constituted by, for example, a rigid printed wiring board.
  • the midplane 21 has a first main surface 21a and a second main surface 21b on the back surface thereof.
  • the blade 23 has a first main surface 23a and a second main surface 23b on the back surface thereof.
  • electrical wiring is provided on the first main surface, the second main surface and / or the inside of these substrates.
  • the waveguide substrate 25 may be mainly composed of an insulating base similar to a rigid printed wiring board.
  • the waveguide substrate 25 has a first main surface 25a and a second main surface 25b on the back surface thereof.
  • electrical wiring may be provided on the first main surface, the second main surface, and / or inside.
  • the waveguide substrate 25 is provided as a so-called mezzanine board, is arranged in a stacked manner with respect to the blade 23, and is fixed to the blade 23 with screws or the like. Signal transmission between the waveguide substrate 25 and the blade 23 is performed by light and / or electricity.
  • the electrical or optical connection may be made in the same manner as a known method, for example.
  • the optical connection between the waveguide substrate 25 and the blade 23 may be made by an optical cable connected to these substrates via a known connector.
  • the electrical plug 13 is provided on the first main surface 21 a of the midplane 21.
  • the electrical receptacle 15 is provided at the connection side end 23 f of the blade 23. With the blade 23 oriented perpendicular to the first main surface 21 a of the midplane 21, the electrical receptacle 15 is inserted into and fitted into the electrical plug 13 in the direction along the blade 23 (y direction). As a result, the electrical receptacle 15 and the electrical plug 13 are mechanically coupled, and the terminals inside the electrical receptacle 15 and the electrical plug 13 are electrically connected to each other. As a result, the midplane 21 and the blade 23 are positioned and electrically connected to each other.
  • the direction in which the blade 23 is inserted into the midplane 21 is not limited to a case where the blade 23 is perpendicular to the midplane 21 (90 °).
  • the blade 23 may be inserted at 60 ° or more and 130 ° or less, and is perpendicular to the midplane 21. Just plug it in from any direction.
  • the specific configuration of the electrical connector 11 may be the same as the configuration of a known board-to-board electrical connector. It is also possible to provide the electrical plug 13 on the blade 23 and the electrical receptacle 15 on the midplane 21.
  • the optical plug 17 is provided on the first main surface 21 a of the midplane 21.
  • the optical receptacle 19 is provided at the connection side end portion 25 f of the waveguide substrate 25.
  • the waveguide substrate 25 is constituted by a mezzanine (mezzanine floor) board.
  • the optical waveguide band 29 or the like is not directly disposed on the blade 23. Therefore, the waveguide substrate 25 is disposed away from the blade 23 in the x direction, or the waveguide substrate 25 is disposed away from the midplane 21 in the y direction in a state where the blade 23 is connected to the midplane 21. can do.
  • the waveguide substrate 25 can be separated from the midplane 21 by adjusting the position in the connection direction (y direction) of the optical connector 5 with respect to the blade 23. As a result, it is easy to secure a space for arranging the optical connector 5 between the connection-side end portion 25f of the waveguide substrate 25 and the first main surface 21a of the midplane 21.
  • FIG. 1 illustrates an arrangement in which the optical plug 17 is positioned at the center of the end portion (one side) of the blade 23 and the electrical connector 11 is positioned on both sides thereof. Moreover, the case where the arrangement
  • the optical plug 17 holds the ends of a plurality (four in this embodiment) of optical cables 27.
  • the waveguide substrate 25 is provided with a plurality of (four in this embodiment) optical waveguide bands 29.
  • the optical connector 5 can connect the plurality of optical cables 27 and the plurality of optical waveguide bands 29 simultaneously.
  • the plurality of optical cables 27 and the plurality of optical waveguide bands 29 are arranged in a direction in which the connection side end portion 25f (one side) of the waveguide substrate 25 extends at least in the connection portion.
  • the arrangement interval is uniform, for example.
  • the end portion of the optical cable 27 connected to the optical waveguide band 29 is held by the optical plug 17 so as to be orthogonal to the first main surface 21a of the midplane 21. Further, the portion of the optical cable 27 that extends from the optical plug 17 to the rear side (the side opposite to the connection side) is curved so as to draw an arc, and then extends along the first main surface 21a.
  • the curvature of the optical cable 27 is set to be larger than the minimum allowable bending radius of the optical cable.
  • connection-side end 25f of the waveguide substrate 25 is further away from the first main surface 21a of the midplane 21 in the y direction than the connection-side end 23f of the blade 23. Therefore, a sufficient distance between the tip of the optical cable 27 (tip of the optical plug 17) and the first main surface 21a is secured. As a result, the radius of the curved portion of the optical cable 27 is large, and the influence of the curvature on the light transmission is suppressed.
  • Each optical cable 27 has a plurality of optical fibers 31 (see FIG. 10).
  • the optical fiber 31 may have a core and a clad as is well known.
  • Each optical fiber 31 may have a coating as necessary.
  • the plurality of optical fibers 31 may be covered and bundled with a sheath, or may not be bundled.
  • the optical cable 27 includes a film-like one having a core and a clad.
  • the plurality of optical fibers 31 are arranged in a line in the width direction (z direction) of the optical plug 17 at least inside the optical plug 17.
  • the plurality of optical waveguide bands 29 are provided on the first main surface 25 a of the waveguide substrate 25.
  • the plurality of optical waveguide bands 29 extend, for example, linearly over the whole, and are arranged in parallel with each other and evenly. However, the plurality of optical waveguide bands 29 may be appropriately bent or unevenly arranged.
  • Each optical waveguide band 29 has a plurality of optical waveguides 33 (see FIG. 10).
  • each optical waveguide 33 has the same configuration as an optical fiber, and has a core and a clad (not shown).
  • the optical waveguide 33 may be an appropriate type such as a slab type, a buried type, or a semi-buried type.
  • Each optical waveguide 33 may be covered with a film or the like and not visible.
  • the plurality of optical waveguides 33 extend, for example, linearly over the whole and are arranged in parallel and evenly with each other. However, the plurality of optical waveguides 33 may be appropriately bent or unevenly arranged.
  • FIG. 3 is a perspective view showing the optical plug 17.
  • the optical plug 17 has a plug main body portion 17m that holds the optical cable 27, and guide pins 17c provided in parallel to the plug main body portion 17m. These are all inserted into holes (described later) of the optical receptacle 19 and used for positioning (connection) between the optical cable 27 and the optical waveguide band 29.
  • the plug body 17m has a base 17a and a plurality of protrusions 17b protruding from the tip of the base 17a.
  • the tip of the optical cable 27 is held by the protrusion 17b and exposed from the tip of the protrusion 17b.
  • the base portion 17a is formed in a substantially rectangular parallelepiped shape, for example.
  • the corner of the tip of the base portion 17a is chamfered so that the insertion of the optical receptacle 19 into the hole is facilitated.
  • the plurality of protrusions 17b are arranged in the width direction (z direction) of the base portion 17a.
  • Each protrusion 17b is smaller than the base 17a not only in the width direction but also in the thickness direction (x direction), for example.
  • the tip of the protrusion 17b may be chamfered so as to facilitate the insertion of the optical receptacle 19 into the hole, similarly to the tip of the base 17a.
  • the guide pins 17c are provided, for example, as a pair on both sides in the width direction (z direction) of the base portion 17a, and protrude to the same position as the tip of the base portion 17a.
  • the tip of the guide pin 17c is tapered so that insertion into the hole of the optical receptacle 19 is facilitated.
  • the optical cable 27 extends from the middle of the height direction (y direction) to the outside of the optical plug 17 on the one side surface in the thickness direction (x direction) of the base portion 17 a, and the first main surface 21 a of the midplane 21. It extends toward.
  • a plurality of grooves 17e extending in the insertion direction of the base portion 17a are formed on the surface of the base portion 17a in the thickness direction.
  • the plurality of grooves 17e are also formed on the side opposite to the side from which the optical cable 27 extends (see FIG. 5).
  • the plurality of grooves 17 e function as a guide when the base portion 17 a is inserted into the optical receptacle 19 and contribute to positioning of the optical cable 27.
  • 4 (a) and 4 (b) are perspective views of the optical plug 17 with some members removed.
  • the optical plug 17 includes, for example, a positioned member 39 that constitutes the protrusion 17b, a holding member 34 that holds the positioned member 39, and an elastic member that is interposed therebetween. 43 (FIG. 4B).
  • the holding member 34 includes, for example, a root-side member 35 that constitutes a root-side portion of the base portion 17a, a tip-side member 37 (FIG. 3) that constitutes a tip-side portion of the base portion 17a, and a pin member 41 having a guide pin 17c. have.
  • the positioned member 39 holds the tip of the optical cable 27.
  • the positioned member 39 is configured by, for example, adhering two members that sandwich the tip of the optical cable 27 (the plurality of optical fibers 31), and sandwiches the optical cable 27 and is adhered to the optical cable 27.
  • the root side member 35 and the tip side member 37 are coupled to each other to hold the positioned member 39 therebetween.
  • the distal end side member 37 accommodates substantially the entire positioned member 39 in a space opened to the root side member 35 side, and the root side member 35 closes the space.
  • the distal end (projecting portion 17 b) of the positioned member 39 projects from the distal end opening of the distal end side member 37.
  • the base side member 35 and the tip side member 37 are coupled by, for example, engagement.
  • a claw portion 35f is formed in the root side member 35, and a hole portion 37f (FIG. 3) in which the claw portion 35f is engaged is formed in the distal end side member 37.
  • the root side member 35 and the tip side member 37 are allowed to move within a predetermined range in the connection direction (y direction) of the positioned member 39. Further, the root side member 35 and the tip side member 37 permit the movement of the positioned member 39 within a relatively small range of play even in the direction (z direction and x direction) orthogonal to the connection direction.
  • the root side member 35 and the tip side member 37 can hold any number of positioned members 39 within a predetermined number (four in the present embodiment).
  • the pin member 41 includes a guide pin 17c and a pedestal portion 41a that supports the guide pin 17c.
  • the pedestal portion 41 a is positioned on the root side member 35.
  • the root side member 35 has a bottom surface portion 35 a that is overlapped with the first main surface 21 a of the midplane 21.
  • the pedestal portion 41a is placed on a portion of the bottom surface portion 35a protruding in a flange shape.
  • the pedestal portion 41a and the bottom surface portion 35a are positioned in a direction (xy direction) along the first main surface 21a by forming protrusions and grooves on the contact surfaces.
  • the elastic member 43 urges the positioned member 39 toward the distal end side with respect to the root side member 35. As a result, the contact pressure between the positioned member 39 and the waveguide substrate 25 is adjusted. As a result, the optical cable 27 can be stably urged toward the optical waveguide band 29 with a predetermined force, and the optical connection loss can be reduced.
  • the biased force can be set to be 4N or more and 20N or less, for example. Furthermore, in the connection between the optical fiber and the optical waveguide, if the urging force is set to be, for example, 10N or more and 14N or less, the optical connection loss can be minimized.
  • the elastic member 43 is, for example, a compression coil spring, and is generally accommodated in the root side member 35.
  • FIG. 5 is a perspective view of the optical plug 17 as viewed from the second main surface 21b side of the midplane 21.
  • FIG. 5 is a perspective view of the optical plug 17 as viewed from the second main surface 21b side of the midplane 21.
  • the optical plug 17 is held on the midplane 21 by a washer 47 superimposed on the second main surface 21b and a screw 45 inserted through the washer 47 and the midplane 21.
  • FIG. 6 (a) and 6 (b) are cross-sectional views taken along the line VIa-VIa in FIG. 5, and show different states.
  • FIG. 6C is a cross-sectional view taken along the line VIc-VIc in FIG.
  • the optical plug 17 is attached to the midplane 21 so as to be movable in the direction along the first main surface 21a with respect to the midplane 21. That is, the optical plug 17 is attached using a so-called floating structure. Specifically, it is as follows.
  • the root side member 35 has a boss 35 b that protrudes from the bottom surface portion 35 a to the midplane 21 side and is inserted into a hole portion 21 h formed in the midplane 21.
  • a nut 49 is accommodated in the pedestal portion 41 a of the pin member 41.
  • the nut 49 is inserted into the pedestal portion 41a from a slit (not shown) formed on the side surface of the pedestal portion 41a, for example.
  • the screw 45 is inserted into a hole formed in the boss 35 b and is screwed into the nut 49.
  • the pedestal 41a itself may be internally threaded.
  • the protruding amount of the boss 35b from the bottom surface portion 35a is larger than the thickness of the midplane 21. Accordingly, when the screws 45 are screwed together, the washer 47 comes into contact with the boss 35b and is clamped between the boss 35b and the screw head of the screw 45 before the midplane 21 is clamped with the bottom surface portion 35a. Therefore, the optical plug 17 is not fixed to the midplane 21 by the screw 45 and the washer 47.
  • the vertical movement (y direction) of the optical plug 17 with respect to the midplane 21 causes the bottom surface portion 35 a and the washer 47 to move.
  • the clearance is regulated within the range of the difference between the clearance and the thickness of the midplane 21.
  • the optical plug 17 can be moved in the y direction.
  • looseness in fitting in the y direction can be reduced. Therefore, for example, the optical plug 17 may be movable only in the y direction.
  • a cushioning material may be arranged between the bottom surface portion 35a and the midplane 21 or between the washer 47 and the midplane 21 to further enhance the effect of alleviating the looseness of fitting in the y direction.
  • the buffer material for example, a urethane resin or a coil spring can be used. By disposing such a buffer material, if movement in the xz direction is possible, movement in the xz direction can be suppressed, and unnecessary rattling of the optical plug 17 can be suppressed. it can.
  • the diameter of the boss 35b is set smaller than the diameter of the hole 21h of the midplane 21. Accordingly, the optical plug 17 is movable with respect to the midplane 21 in the direction along the first main surface 21a of the midplane 21 within a range of the difference between the diameter of the boss 35b and the diameter of the hole 21h.
  • hub 35b and the hole 21h may be set suitably.
  • FIG. 6C illustrates a circular case.
  • FIG. 7A is a perspective view showing the optical receptacle 19.
  • FIG. 7B is a perspective view showing the optical receptacle 19 with some members removed.
  • the optical plug 17 has the plug main body portion 17m and the guide pin 17c.
  • the optical receptacle 19 includes a body hole 19m (FIG. 7A) into which the plug body 17m is fitted, and a pin hole 19c (FIG. 7A) into which the guide pin 17c is fitted. )have.
  • the main body hole 19m includes a base hole 19a (FIG. 7A) corresponding to the base 17a and a plurality of protrusion holes 19b (FIG. 7) located on the back side and corresponding to the plurality of protrusions 17b. (B)). An end portion of the optical waveguide band 29 connected to the optical cable 27 is exposed to the outside of the optical receptacle 19 through the projection hole 19b and the base hole 19a.
  • the optical receptacle 19 includes a fixing member 51 (FIG. 7A) having a base hole 19a and a pin hole 19c, and a plurality of positioning members 53 (FIG. 7) each having a protrusion hole 19b. 7 (b)).
  • the shape of the base hole 19 a corresponds to the shape of the base portion 17 a of the optical plug 17. That is, the base hole 19a has a substantially rectangular parallelepiped shape, and a plurality of rails 19e guided by the plurality of grooves 17e of the base portion 17a are formed on the inner peripheral surface thereof.
  • the opening end (end on the negative side in the y direction) of the base hole 19a is enlarged toward the edge side (the negative side in the y direction) so that the base 17a can be easily inserted (the inclined surface 19aa is formed).
  • the cross-sectional shape of the pin hole 19c corresponds to the cross-sectional shape of the guide pin 17c, and is circular in this embodiment.
  • the opening end of the pin hole 19c (the end on the negative side in the y direction) is enlarged toward the edge (the negative side in the y direction) so that the guide pin 17c can be easily inserted (the inclined surface 19ca is formed). ing.).
  • the pin hole 19c is formed in a portion of the optical receptacle 19 (fixing member 51) that is configured to protrude to the optical plug 17 side (y direction negative side), and an opening end on the optical plug 17 side. Is located closer to the optical plug 17 than the opening end of the base hole 19a on the optical plug 17 side.
  • the fixing member 51 includes, for example, a hollow portion 51a in which a base hole 19a is formed, and an extending portion 51b extending from the upper surface side (x direction positive side) portion of the hollow portion 51a to the root side (y direction positive side).
  • a hollow portion 51a in which a base hole 19a is formed
  • an extending portion 51b extending from the upper surface side (x direction positive side) portion of the hollow portion 51a to the root side (y direction positive side).
  • the hollow portion 51a is formed, for example, in a generally cylindrical shape with a rectangular cross section.
  • the extending portion 51b is a portion that contributes to fixing the fixing member 51 and is formed in a plate shape that is generally overlapped with the waveguide substrate 25, for example.
  • channel and the recessed part are provided in the outer surface of the fixing member 51 suitably.
  • the fixing member 51 causes the rear end surface (surface facing the y-direction positive side) of the hollow portion 51a to abut on the end surface 25fa (surface facing the y-direction negative side) of the waveguide substrate 25 and the extending portion 51b. Is positioned so as to overlap the first main surface 25a of the waveguide substrate 25.
  • the screw 55 (FIG. 1) is inserted into the insertion hole 51h formed in the extending portion 51b and the insertion hole (not shown) formed in the optical waveguide substrate 25, and the second main surface of the waveguide substrate 25.
  • the fixing member 51 is fixed to the waveguide substrate 25 by screwing with a nut (not shown) arranged on the 25b side.
  • the positioning member 53 is disposed on the first main surface 25 a of the waveguide substrate 25 and is fixed to the waveguide substrate 25 by being pressed by the fixing member 51. Therefore, the positioning member 53 does not need to be directly fixed to the waveguide substrate 25 with a screw or an adhesive.
  • the fixing members 51 can fix the positioning members 53 to the waveguide substrate 25 by an arbitrary number within a predetermined number (four in the present embodiment).
  • the elastic member 57 is interposed between the positioning member 53 and the fixing member 51.
  • the elastic member 57 is a leaf spring, for example. Therefore, the force for pressing the positioning member 53 by the fixing member 51 is kept substantially constant regardless of the processing accuracy of the fixing member 51 and the tightening strength of the screw 55.
  • FIG. 8A is a perspective view showing the waveguide substrate 25 in a state where the positioning member 53 is placed
  • FIG. 8B is a waveguide substrate 25 in which the positioning member 53 is not placed.
  • the positioning member 53 includes a hollow portion 53a in which the protrusion hole 19b is formed, and an extending portion 53b extending from the upper surface side (x direction positive side) portion of the hollow portion 53a to the root side (y direction positive side). is doing.
  • the hollow portion 53a is formed in a generally rectangular frame shape, for example.
  • the end of the optical waveguide band 29 is exposed inside (in the protrusion hole 19b).
  • the extending part 51b is a part that contributes to the positioning of the positioning member 53, and is formed, for example, in a plate shape that is generally overlapped with the waveguide substrate 25.
  • the cross-sectional shape of the protrusion hole 19 b corresponds to the cross-sectional shape of the protrusion 17 b of the optical plug 17. That is, the projection hole 19b has a substantially rectangular parallelepiped shape. However, the opening end portion (end portion on the negative side in the y direction) of the protrusion hole 19b is increased in diameter toward the edge side (negative direction side in the y direction) so that the protrusion portion 17b can be easily inserted (the inclined surface 19ba). Is formed.)
  • a plurality of protrusions 53c are formed on the inner peripheral surface of the protrusion hole 19b.
  • the protrusion 17b of the optical plug 17 is positioned by a plurality of protrusions 53c coming into contact with the outer periphery thereof.
  • the positioning member 53 does not need to be formed with high accuracy over the entire circumference of the projection hole 19b, and may be formed with high accuracy only at the projection 53c. Further, the thermal deformation in the portion between the projections 53c of the positioning member 53 does not directly affect the positioning accuracy. Further, the sliding area between the projecting portion 17b of the optical plug 17 and the projecting portion hole 19b is reduced, and as a result, the sliding resistance is reduced.
  • a relief groove 53e (see also FIG. 10) is formed at a corner between a surface that is superimposed on the first main surface 25a of the waveguide substrate 25 and a surface that is in contact with the end surface 25fa of the waveguide substrate 25. Yes.
  • the corners of the first main surface 25a and the end surface 25fa of the waveguide substrate 25 are less likely to affect the positioning of the positioning member 53.
  • the positioning accuracy is maintained even if uncut portions are left at the corners of the first main surface 25a and the end surface 25fa due to dicing.
  • the positioning member 53 is positioned in the connection direction (y direction) by bringing the rear end surface (surface facing the y direction positive side) of the hollow portion 53 a into contact with the end surface 25 fa of the waveguide substrate 25.
  • the positioning member 53 is positioned in the thickness direction (z direction) by overlapping the extending portion 53 b on the first main surface 25 a of the waveguide substrate 25.
  • a protrusion 59 is provided on the first main surface 25a, and the positioning member 53 is fitted by fitting the protrusion 59 into a hole (not shown) formed in the extending portion 53b of the positioning member 53. Positioning in the width direction (z direction) is performed.
  • the protrusion 59 may be formed of an appropriate material such as resin, metal, or ceramic, and is fixed to the waveguide substrate 25 by an appropriate method such as being fixed by an adhesive or being welded to the waveguide substrate 25. May be fixed.
  • a hole (not shown) of the positioning member 53 into which the protrusion 59 is fitted may be fitted not only in the z direction but also in the y direction, and is formed in a long hole shape in the y direction. The position adjustment of 53 in the y direction may be allowed.
  • the base side member 35, the distal end side member 37, the positioned member 39 and the pin member 41 constituting the optical plug 17, and the positioning member 53 and the fixing member 51 constituting the optical receptacle 19 are made of resin, ceramics, metal or the like. You may comprise with an appropriate material.
  • the strength is higher than the material of the positioned member 39 and the positioning member 53.
  • the former is composed of PBT and the latter is composed of PPS.
  • the pin member 41 is easily applied with a large force, and since the secondary moment of the cross section of the guide pin 17c is small, the pin member 41 is made of a material having higher strength than the materials of the root side member 35 and the tip side member 37. It is preferable.
  • the root side member 35 and the tip side member 37 are made of resin, and the pin member 41 is made of resin or metal having higher strength than the resin.
  • the material of the positioned member 39 and the positioning member 53 may be a material having a lower coefficient of thermal expansion than other materials. As will be described later, since it is the positioned member 39 and the positioning member 53 that contribute to the final positioning of the optical fiber 31 and the optical waveguide 33, by configuring these members with a material having a low thermal expansion coefficient, The optical connector 5 as a whole can be made inexpensive while reducing the influence of heat on positioning.
  • each member may be set appropriately.
  • one side of the outer shape of the positioned member 39 and the positioning member 53 is about several millimeters.
  • FIGS. 9A to 9D are views showing how the optical plug 17 is inserted into the optical receptacle 19. These drawings are plan views of the optical plug 17 and the optical receptacle 19 as viewed from the second main surface 23b side of the waveguide substrate 25, and the waveguide substrate 25 and the midplane 21 are not shown.
  • FIG. 9A shows a state immediately before the optical plug 17 is inserted into the optical receptacle 19.
  • the optical plug 17 is in a direction perpendicular to the insertion direction with respect to the optical receptacle 19 (x direction and In the z direction), parallel displacement and rotational displacement may occur.
  • the guide pin 17c extends to the same position as the tip of the base portion 17a.
  • the open end of the pin hole 19c (FIG. 7A) is It is located closer to the optical plug 17 than the opening end of the base hole 19a (main body hole 19m, FIG. 7A).
  • the tip of the guide pin 17c is tapered, and the opening end of the pin hole 19c is enlarged toward the edge (inclined surface 19ca).
  • This clearance may be equal to or greater than the moving width of the floating structure (clearance between the boss 35b and the hole 21h).
  • the optical receptacle 19 is inserted and inserted into the optical plug 17 with a large clearance in relation to the optical plug 17, so that insertion workability is improved and defects such as buckling and breakage are reduced. it can.
  • the base 17a slides in the base hole 19a, and the movement of the base 17a in the xz direction is restricted.
  • the guide pin 17c and the pin hole 19c may also contribute to the secondary positioning following the primary positioning.
  • the play (rattle) between the base portion 17a and the base portion hole 19a is based on the clearance (initial value) at the start of insertion of the guide pin 17c and the pin hole 19c. Is also small.
  • the plug main body 17m is inserted into the main body hole 19m as far as it will go.
  • FIG. 10 is a perspective view showing the positioned member 39 and the positioning member 53 in the state of FIG.
  • FIG. 12A is a cross-sectional view taken along line XIIa-XIIa in FIG.
  • FIG. 12B is a cross-sectional view taken along line XIIb-XIIb in FIG.
  • the protrusion 17b is fitted into the protrusion hole 19b (tertiary positioning).
  • the optical fiber 31 and the optical waveguide 33 are finally positioned with high accuracy in the xz direction.
  • the movement of the optical plug 17 in the insertion direction of the holding member 34 is regulated by the holding member 34 coming into contact with the fixing member 51 of the optical receptacle 19. Specifically, for example, as shown in FIGS. 9D and 12B, the pedestal portion 41 a of the holding member 34 comes into contact with a portion where the pin hole 19 c of the fixing member 51 is formed. Regulations are made.
  • the movement of the optical plug 17 in the insertion direction of the positioned member 39 is restricted, for example, when the positioned member 39 comes into contact with the end face 25fa (FIG. 10) of the waveguide substrate 25.
  • the contact pressure is defined by the elastic member 43.
  • the optical transmission module 3 includes the waveguide substrate 25 in which the optical waveguide 33 is provided on the first main surface 25a, the midplane 21 positioned on the waveguide substrate 25, and the optical waveguide 33. And an optical receptacle 19 fixed to the waveguide substrate 25.
  • the optical transmission module 3 holds the optical fiber 31 and is fitted to the optical receptacle 19, whereby the optical waveguide 33 and the optical fiber 31 can be aligned in a direction (xz direction) orthogonal to the connection direction.
  • the optical plug 17 is held by the midplane 21 so as to be movable in the xz direction. In the present embodiment, the optical plug 17 is held so as to be movable in the y direction.
  • the optical plug 17 can move with respect to the midplane 21 even after the optical receptacle 19 is inserted, it is possible to prevent the optical connector 5 from being loaded. Therefore, the optical plug 17 has excellent long-term reliability and a highly accurate connection state. Can be maintained. Specifically, when physical vibration, impact, or thermal change is applied to the optical / electrical composite transmission module 1, or when maintenance work such as replacement of the blade 23 is performed, the blade with respect to the midplane 21 is used. However, since the movement of the blade 23 is absorbed by the movement of the optical plug 17 with respect to the midplane 21, no load is applied to the optical connector 5 and a stable fitting state can be maintained.
  • the optical waveguide 33 is fixed to the waveguide substrate 25, if the positional deviation between the substrates occurs, the connection between the optical waveguide 33 and the optical fiber 31 is not preferably made or unnecessary for the waveguide substrate 25 or the like. There is a risk of stress. However, in the present embodiment, such a fear is reduced by the floating structure. As a result, for example, the influence of the connection of the electrical connector 11 with relatively low positioning accuracy on the connection of the optical connector 5 is reduced.
  • the optical receptacle 19 has a pin hole 19c
  • the optical plug 17 has a guide pin 17c
  • one of the pin hole 19c and the guide pin 17c is connected to the other in the connecting direction (y
  • the clearance in the direction (xz direction) perpendicular to the connection direction between the two becomes smaller as the insertion proceeds.
  • the floating structure is preferably used. That is, as already described, even if the initial displacement between the optical plug 17 and the optical receptacle 19 is relatively large, the guide pin 17c can be inserted into the pin hole 19c, and the position thereof can be reduced by the guiding action. Deviation can be reduced. As a result, for example, connection workability is improved.
  • the optical receptacle 19 focuses only on the main body hole 19m (the protrusion hole 19b or the base hole 19a that exposes the optical waveguide 33 and is provided in parallel to the pin hole 19c. You may have).
  • the optical plug 17 has a plug body portion 17m that is provided in parallel to the guide pin 17c and holds the optical fiber 31 and fits into the body portion hole 19m. After the insertion of the pin hole 19c and the guide pin 17c has progressed and the clearance between the two has decreased to a predetermined size, the plug body portion 17m is fitted into the body portion hole 19m.
  • the optical receptacle 19 does not invite the plug main body portion 17m that holds the optical fiber 31, but does not hold the optical fiber 31 before the plug main body portion 17m is inserted into the main body hole 19m ( Guide pin 17c) is guided. Accordingly, it is possible to prevent the tip of the plug main body portion 17m (the tip of the optical fiber 31) from coming into contact with the peripheral portion of the main body hole 19m of the optical receptacle 19, and the optical fiber 31 is protected.
  • the optical receptacle 19 is a separate member from the member (fixing member 51) constituting the pin hole 19c, and is used for a protrusion that constitutes at least a part on the back side of the body portion hole 19m. It has a positioning member 53 in which a hole 19b is formed.
  • the optical plug 17 is a separate member from the member (pin member 41) constituting the guide pin 17c, and has a positioned member 39 that fits into the projection hole 19b.
  • the members (positioning member 53 and positioned member 39) that contribute to the final positioning are reduced in size.
  • high-precision processing is facilitated.
  • the optical fiber 31 and the optical waveguide 33 are aligned with high accuracy.
  • such high-accuracy positioning can be realized with a single action simply and by protecting the tip of the optical fiber 31 by the above-described guiding action of the guide pin 17c.
  • the optical receptacle 19 has a base hole 19a that constitutes an inlet side of the protrusion hole 19b in the main body hole 19m.
  • the optical plug 17 has a holding member 34 that holds the positioned member 39 so as to be movable within a predetermined play range in a direction orthogonal to the connection direction (xz direction) and fits into the base hole 19a. ing.
  • the positioning member 39 (projecting part 17b) is not suddenly fitted into the projecting hole 19b (tertiary positioning) but held.
  • the fitting of the member to be positioned 39 is started after the fitting (secondary positioning) of the member 34 (base 17a) to the base hole 19a is started.
  • the positioned member 39 is held by the holding member 34 so as to be movable within a predetermined play range, and therefore, the positioning member 39 and the positioned member 39 are projected to the positioning accuracy of the holding hole 34a. It is suppressed that the positioning accuracy with the part hole 19b is affected.
  • the optical receptacle 19 has the fixing member 51 that is fixed to the waveguide substrate 25 by the screw 55 and fixes the positioning member 53 to the waveguide substrate 25.
  • the processing accuracy can be improved, and the positioning accuracy between the optical fiber 31 and the optical waveguide 33 can be improved.
  • the optical plug 17 is held by the midplane 21 so as to be movable in a direction (xz direction) orthogonal to the connection direction, and has a holding member 34 that holds the positioned member 39. .
  • the member to be positioned 39 that contributes to the final positioning of the optical fiber 31 can be reduced in size while securing the volume of the member necessary for realizing the floating structure in the holding member 34.
  • the processing accuracy is improved, and the positioning accuracy between the optical fiber 31 and the optical waveguide 33 is improved.
  • the optical receptacle 19 can have an arbitrary number of positioning members 53 within a predetermined number (predetermined number> 1, four in this embodiment). It is possible to have any number of positioning members 39 within the predetermined number.
  • optical connector 5 can connect any number of optical transmission lines, it is highly versatile and is expected to reduce costs by mass production.
  • the waveguide substrate 25 is connected to the first main surface 21a of the midplane 21 with the first main surface 25a orthogonal to the first main surface 21a of the midplane 21.
  • the optical plug 17 is provided on the first main surface 21 a of the midplane 21, holds the tip of the optical fiber 31 so as to extend in a direction perpendicular to the first main surface 21 a of the midplane 21, and the midplane 21. It is possible to move in the direction along the first main surface 21a.
  • the optical fiber 31 on the midplane 21 and the optical waveguide 33 on the blade 23 Can be connected.
  • the degree of freedom of the optical wiring of the optical transmission module 3 is improved.
  • the optical plug 17 should just be movable in the direction along the 1st main surface 21a, the movement range can be restrict
  • the floating structure of this embodiment has a moving range defined as compared with a floating structure that needs to be movable in one direction along the blade and in a direction perpendicular to the blade (see Patent Document 1). Easy.
  • the waveguide substrate 25 is an example of the waveguide substrate of the present invention.
  • the midplane 21 is an example of the connection base of the present invention.
  • the pin hole 19c is an example of the guide portion of the present invention.
  • the guide pin 17c is an example of the guided portion of the present invention.
  • the protrusion hole 19b is an example of the first hole of the present invention.
  • the base hole 19a is an example of the second hole of the present invention.
  • the blade 23 is an example of the wiring substrate of the present invention.
  • the electrical receptacle 15 is an example of the second electrical connector component of the present invention.
  • the electrical plug 13 is an example of the first electrical connector component of the present invention.
  • the present invention is not limited to the above embodiments and modifications, and may be implemented in various modes.
  • the light transmission module may not have an electrical connector.
  • the positioning of the waveguide base and the connection base may be performed by, for example, a housing that accommodates the substrate assembly.
  • connection base may be a backplane.
  • connection between the connection base and the waveguide base is not limited to the connection in which the waveguide base is orthogonal to the main surface of the connection base.
  • connection base and the waveguide base may be arranged along the main surface and the ends may be connected to each other.
  • a mirror is provided at the end of the optical waveguide, it is possible to connect the optical fiber in a direction orthogonal to the optical waveguide, and thus connect the connecting base to the main surface of the waveguide substrate. It is also possible to make them orthogonal.
  • optical receptacle and the optical plug are not limited to those performing the three-stage positioning (first to third positioning) described with reference to FIGS.
  • the guide portion and the guided portion are not provided, only the secondary positioning by the base portion 17a and the base hole 19a and the tertiary positioning by the protrusion 17b and the protrusion hole 19b. It may be done. Even in this case, the floating structure can be used by manually adjusting the position of the optical plug with respect to the connection base.
  • the plug body portion 17m is integrally formed, and therefore, after the primary positioning by the pin hole 19c and the guide pin 17c, it is fitted once (corresponding to the secondary positioning or the tertiary positioning). May be performed. Even in this case, effects such as improvement in workability by fitting after the guiding action are exhibited.
  • the guided portion (side provided on the optical receptacle) is inserted into the guide portion (side provided on the optical plug), but the guide portion may be inserted into the guided portion.
  • the plug main body portion and the guided portion are separate parts in parallel, and the main body hole and the guide part are separate parallel holes.
  • the plug body portion and the body portion hole may function as the guided portion and the guide portion.
  • the optical receptacle and the optical plug may be configured by an appropriate number of members.
  • the root side member 35 and the pin member 41 are separate members, but they may be integrally formed.
  • the guided portion and the plug body portion that are parallel to each other may be integrally formed, and the guide portion and the body portion hole that are parallel to each other may be integrally formed.
  • the optical connector may connect one optical cable and an optical waveguide band.
  • the fixing member may fix only one positioning member
  • the holding member may hold only one positioned member.
  • the optical connector may connect one optical fiber and one optical waveguide.
  • one optical cable may have only one optical fiber
  • one optical waveguide band may have only one optical waveguide.
  • the optical cable extending from the optical plug may be routed in any direction.
  • the optical cable 27 may be routed as in the modification shown in FIG. In this modification, the optical cable 27 extending from the optical plug 217 extends linearly and penetrates the midplane 21.
  • the arrangement thereof may be changed as appropriate.
  • the optical plug 17 may be arranged as in the modification shown in FIG.
  • the optical cable 27 extends along the first main surface 21a of the midplane 21 after extending from the optical plug 17 as in the embodiment.
  • the optical plugs 17 are arranged so as to be displaced from each other in the direction orthogonal to the direction in which the optical cable 27 extends. By being arranged in this manner, the optical cable 27 extending from the adjacent optical plug 17 can be arranged in a state where it is difficult to bend.
  • connection base may be a backplane for connecting the midplane
  • waveguide base may be a midplane. That is, the connection base and the waveguide base can be appropriately selected from backplanes, midplanes and blades in equipment such as servers.
  • SYMBOLS 1 Photoelectric composite transmission module, 3 ... Optical transmission module, 17 ... Optical plug, 19 ... Optical receptacle, 21 ... Mid plane (connection base

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

Abstract

L'invention concerne un module de transmission optique (3) doté d'un substrat de guide d'onde (25) ayant un guide d'onde optique (33) agencé au niveau d'une première surface principale (25a), un plan médian (21) disposé en face du substrat de guide d'onde (25), une fibre optique (31) connectée optiquement au guide d'onde (33), et un réceptacle de lumière (19) fixé au substrat de guide d'onde (25). Le module de transmission optique (3) comprend également un connecteur optique (17) destiné à maintenir la fibre optique (31) et à s'ajuster dans le réceptacle de lumière (19), le connecteur optique (17) étant fixé au plan médian (21) avec du jeu dans les directions x, y et z par rapport au plan médian (21).
PCT/JP2014/058588 2013-03-27 2014-03-26 Module de transmission optique, module de transmission composite photoélectrique, et connecteur optique WO2014157363A1 (fr)

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JP2013-066626 2013-03-27
JP2013066626 2013-03-27

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016121059A1 (fr) * 2015-01-29 2016-08-04 株式会社日立製作所 Dispositif optique d'interconnexion
WO2017212861A1 (fr) * 2016-06-07 2017-12-14 京セラ株式会社 Connecteur optique
JP2018054870A (ja) * 2016-09-29 2018-04-05 日本電気株式会社 光伝送装置
CN108896276A (zh) * 2017-05-11 2018-11-27 纳卢克斯株式会社 位置测定方法以及部件
JP2018189627A (ja) * 2017-05-11 2018-11-29 ナルックス株式会社 位置測定方法及び部品
JP2019032582A (ja) * 2017-08-04 2019-02-28 富士通株式会社 情報処理装置
WO2021177463A1 (fr) * 2020-03-05 2021-09-10 住友電気工業株式会社 Appareil optique, appareil électroluminescent, câble optique et procédé de connexion d'appareil optique

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Publication number Priority date Publication date Assignee Title
JP2001141964A (ja) * 1999-10-15 2001-05-25 Tyco Electronics Corp 光部品
JP2011075688A (ja) * 2009-09-29 2011-04-14 Toppan Printing Co Ltd 光配線コネクタ及び光配線の接続方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001141964A (ja) * 1999-10-15 2001-05-25 Tyco Electronics Corp 光部品
JP2011075688A (ja) * 2009-09-29 2011-04-14 Toppan Printing Co Ltd 光配線コネクタ及び光配線の接続方法

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016121059A1 (fr) * 2015-01-29 2016-08-04 株式会社日立製作所 Dispositif optique d'interconnexion
CN109313314A (zh) * 2016-06-07 2019-02-05 京瓷株式会社 光连接器
WO2017212861A1 (fr) * 2016-06-07 2017-12-14 京セラ株式会社 Connecteur optique
CN109313314B (zh) * 2016-06-07 2020-09-29 京瓷株式会社 光连接器
JP2018054870A (ja) * 2016-09-29 2018-04-05 日本電気株式会社 光伝送装置
JP6989950B2 (ja) 2017-05-11 2022-01-12 ナルックス株式会社 位置測定方法及び部品
JP2018189627A (ja) * 2017-05-11 2018-11-29 ナルックス株式会社 位置測定方法及び部品
CN108896276A (zh) * 2017-05-11 2018-11-27 纳卢克斯株式会社 位置测定方法以及部件
CN113933030A (zh) * 2017-05-11 2022-01-14 纳卢克斯株式会社 位置测定部件
JP2022016614A (ja) * 2017-05-11 2022-01-21 ナルックス株式会社 位置測定方法及び部品
CN108896276B (zh) * 2017-05-11 2022-02-25 纳卢克斯株式会社 位置测定方法以及部件
JP7244954B2 (ja) 2017-05-11 2023-03-23 ナルックス株式会社 位置測定方法及び部品
JP2019032582A (ja) * 2017-08-04 2019-02-28 富士通株式会社 情報処理装置
WO2021177463A1 (fr) * 2020-03-05 2021-09-10 住友電気工業株式会社 Appareil optique, appareil électroluminescent, câble optique et procédé de connexion d'appareil optique
CN115210621A (zh) * 2020-03-05 2022-10-18 住友电气工业株式会社 光装置、发光装置、光缆以及光装置的连接方法

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