WO2009154160A1 - Connecteur optique - Google Patents

Connecteur optique Download PDF

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Publication number
WO2009154160A1
WO2009154160A1 PCT/JP2009/060829 JP2009060829W WO2009154160A1 WO 2009154160 A1 WO2009154160 A1 WO 2009154160A1 JP 2009060829 W JP2009060829 W JP 2009060829W WO 2009154160 A1 WO2009154160 A1 WO 2009154160A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
optical
sleeve
optical connector
light guide
Prior art date
Application number
PCT/JP2009/060829
Other languages
English (en)
Japanese (ja)
Inventor
崇 松井
Original Assignee
アルプス電気株式会社
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 アルプス電気株式会社 filed Critical アルプス電気株式会社
Publication of WO2009154160A1 publication Critical patent/WO2009154160A1/fr

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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
    • G02B6/4246—Bidirectionally operating package structures
    • 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
    • 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
    • G02B6/4219—Mechanical fixtures for holding or positioning the elements relative to each other in the couplings; Alignment methods for the elements, e.g. measuring or observing methods especially used therefor
    • G02B6/4228—Passive alignment, i.e. without a detection of the degree of coupling or the position of the elements
    • G02B6/423—Passive alignment, i.e. without a detection of the degree of coupling or the position of the elements using guiding surfaces for the alignment

Definitions

  • the present invention relates to an optical connector for optical communication, and more particularly to an optical connector having an improved light transmission efficiency between an optical element such as a photodiode and an optical fiber.
  • Patent Document 1 As an optical connector in which the light transmission efficiency between an optical element such as a photodiode and an optical fiber is improved, there is a prior art described in, for example, Patent Document 1 below.
  • an optical element for light reception or light emission is disposed opposite to the end face on the smaller diameter side of the conical light guide, and the diameter dimension facing the end face of the optical fiber is A lens is integrally formed on the large side.
  • the diameter of the end face (light emitting surface side) of the light guide is formed smaller than the light receiving surface of the light receiving optical element (FIG. 7 of Patent Document 1).
  • the diameter of the end face (light receiving surface side) on the light guide side is formed to be larger than the light emitting surface of the light emitting optical element (FIG. 8 of Patent Document 1).
  • the optical connector shown in Patent Document 1 has the following problems.
  • the end surface of the light guide on which the light propagated while totally reflecting in the light guide is Out of the air into the outside air, and then enter the light receiving optical element.
  • the refractive index is generally larger in the light guide than in air in such a configuration.
  • the present invention is intended to solve the above-mentioned conventional problems, and it is an object of the present invention to provide an optical connector which can reduce the loss more than the conventional one and can improve the light transmission efficiency.
  • the present invention relates to an optical connector provided with an optical fiber for propagating light, an optical element for emitting or receiving light, and a sleeve for performing optical connection between the optical fiber and the optical element.
  • the sleeve is provided with a substantially frusto-conical light guide gradually expanding toward the optical element from one small diameter end, and the side of the light guide has a laterally projecting flange portion, and A convex lens is integrally formed on an end face of the sleeve facing the optical element;
  • the opening angle between the axial center line and the straight line connecting the base of the flange and the maximum outer diameter of the lens is 30 degrees. The above is characterized by being less than 90 degrees.
  • light leakage can be prevented particularly when a sleeve is adopted on the light receiving module side, so that an optical connector with high light transmission efficiency can be obtained.
  • the inclination angle of the side surface of the light guide path be 0.5 degrees or more and 1 degree or less.
  • the loss in the entire optical connector can be reduced, and the sleeve can be formed with high precision.
  • a substantially annular guide continuous with the flange portion be integrally formed. In the above means, it is not necessary to provide a special mounting structure in the housing for the light guide.
  • a convex lens be integrally formed on the end face of the sleeve facing the optical fiber.
  • the light transmission efficiency between the sleeve and the optical fiber can be enhanced, and it is particularly effective when applied to the light emitting module side.
  • a convex lens is provided on the light emitting surface or the light receiving surface of the optical element. In the above means, the light transmission efficiency between the optical element and the optical fiber can be enhanced.
  • light transmission efficiency can be enhanced in an optical connector provided with an optical fiber for propagating light and a sleeve for performing optical connection between an optical element for emitting or receiving light.
  • FIG. 1 is a cross-sectional view of an optical connector showing a first embodiment of the present invention
  • FIG. 2 is an enlarged cross-sectional view showing the relationship between an optical module, a sleeve and an optical fiber provided in the optical connector of FIG.
  • FIG. 3A is a cross-sectional view showing the sleeve on the light receiving module side
  • FIG. 3B is a graph showing the range of the optimum inclination angle of the light guide path of the light receiving module side sleeve.
  • the optical connector according to the present invention is employed, for example, in an automobile employing the Media Oriented Systems Transport (MOST), which is an in-vehicle network of an information system.
  • MOST Media Oriented Systems Transport
  • POF plastic optical fibers
  • the optical connector 1 for MOST has a pair of optical modules (a light emitting module 10 and a light receiving module 20) for light reception (for reception) and light emission (for transmission), These are comprised in the state accommodated in one housing 40.
  • FIG. 1 the optical connector 1 for MOST has a pair of optical modules (a light emitting module 10 and a light receiving module 20) for light reception (for reception) and light emission (for transmission), These are comprised in the state accommodated in one housing 40.
  • an open end 40A to which a plug (not shown) provided at an end of an optical fiber is attached is formed at an end of the housing 40 on the X2 side.
  • the light emitting module 10 fixing regions 41 and 42 for attaching the light receiving module 20, positioning recesses 43 and 44 for fixing the sleeve, and individual optical fibers in the plug Insertion recesses 45 and 46 and the like are provided for inserting ferrules (not shown) provided on the periphery of the connector.
  • the light emitting module 10 has a light emitting element (optical element) 11 and a sleeve 12
  • the light receiving module 20 has a light receiving element (optical element) 21 and a sleeve 22.
  • the light emitting element 11 in the present embodiment is formed of an LED
  • the light receiving element 21 is formed of a photodiode.
  • the light emitting element 11 and the light receiving element 21 are fixed in a state in which a transparent resin is coated on a semiconductor bare chip (not shown) on the upper surfaces (surfaces on the X2 side of FIG. 1) of the bases 11A and 21A formed of resin. It is done.
  • the convex lenses 13 and 23 may be fixed to face the sleeves 12 and 22 on the front surface of the semiconductor bare chip, respectively.
  • the outer shapes of the light emitting element 11 and the light receiving element 21 are formed in substantially the same shape, and only the types of semiconductor bare chips provided inside the bases 11A and 21A are different.
  • Frame-shaped ribs 11a and 21a for positioning are provided around the outer edge portions of the bases 11A and 21A, respectively.
  • a reflective film is laminated on the upper surfaces of the bases 11A and 21A, and the light emitting element 11 reflects light emitted from the semiconductor bare chip for light emission to the outside in the X2 direction in the figure, and the light receiving element 21 enters the base 21A. Can be focused on a semiconductor bare chip for light reception.
  • the sleeve 12 is integrally formed of, for example, a synthetic resin material of, for example, a polyolefin type which is excellent in transparency or light transmittance. It is preferable that the side surfaces of the sleeve 12 excluding the both end surfaces be covered with a cladding layer having a lower refractive index. However, when used in contact with air having a refractive index lower than that of a synthetic resin material, air is used as a clad layer (air clad) without being covered with a clad layer made of another material. Good.
  • the sleeve 12 has a light guide 12A whose longitudinal direction is the X direction shown in the drawing.
  • the light guide 12A is formed in a substantially frusto-conical shape in which the diameter dimension thereof becomes smaller toward the X2 side and expands toward the X1 side.
  • a convex lens 12B is integrally formed on one end face 12a on the side of the large diameter X1 in the drawing.
  • the other end face 12b on the side of the small diameter X2 in the drawing forms a plane perpendicular to the axial center line OO.
  • the end face 51 a of the optical fiber 51 is disposed opposite to the other end face 12 b of the light guide 12 A of the sleeve 12.
  • the end face 52a of the optical fiber 52 is disposed opposite to the other end face 22b of the light guide 22A of the sleeve 22.
  • a flange portion 12c that protrudes toward the side (Y direction) which is a direction orthogonal to the axial center line OO is formed.
  • a substantially annular guide portion 12C having a concentric axis with the axial center line OO is integrally formed.
  • the substantially annular guide portion 12C is formed as an annular or cylindrical portion, a positioning convex portion 12C1 is provided circumferentially at one end on the X1 side, and the other end 12C2 is extended in the X2 direction.
  • the substantially annular guide portion 12C is formed to have a constant diameter with respect to the axial center line OO. Furthermore, as shown in FIG.
  • a plurality of positioning ribs 12D having a convex shape extending in the longitudinal direction are integrally formed on the outer circumferential surface of the substantially annular guide portion 12C at predetermined intervals in the circumferential direction (FIG. 2) Omitted).
  • the sleeve 12 is generally formed with high dimensional accuracy by using an injection molding method.
  • FIG. 3B is a graph showing the optimum range of the inclination angle ⁇ of the side surface of the light guide 22A formed in a substantially frusto-conical shape when the sleeve 22 is adopted on the light receiving module 20 side.
  • the optical connector 1 for L2 L1 Change [dB] of the loss of the light guide 22A is shown for each inclination angle .delta.
  • L1 Change [dB] of the loss of the light guide 22A is shown for each inclination angle .delta.
  • the inclination angle ⁇ of the side surface of the light guide path 22A is better at 1 degree than 1.5 degrees, and further 1 degree It can be seen that 0.5 degrees is better than that.
  • a preferable range of the inclination angle ⁇ of the side surface of the light guide path 22A is 0.5 degrees or more and 1 degree or less.
  • the root portion P1 on the X2 side of the flange portion 22c protruding sideward from the side surface of the light guide 22A and the maximum outer diameter portion P2 of the lens 22B
  • the opening angle between the connecting straight line P and the axial center line OO is assumed to be ⁇ .
  • the opening angle ⁇ is preferably 30 degrees or more. Further, since the opening angle ⁇ does not exceed 90 degrees, the opening angle ⁇ is preferably less than 90 degrees.
  • the opening angle ⁇ is 30 degrees or more and less than 90 degrees
  • light emitted from the lens 22B is less leaked in the light receiving element 21 even in the vicinity of the maximum outer shape of the lens 22B separated from the axial center line OO. It becomes possible to detect in the state. For this reason, the fall of the transmission efficiency as the optical connector 1 whole can be prevented.
  • the sleeves 12 and 22 are attached to the inside of the housing 40 from the side of the illustration X1.
  • the sleeves 12 and 22 are mounted through the fixing regions 41 and 42 with the other end face 12b or 22b of the light guide path 12A or 22A facing in the X2 direction.
  • the other end face 12b, 22b side of the light guide path 12A, 22A is inserted into the through hole 47, 48 through the positioning recess 43, 44.
  • the substantially annular guide portion 12C is also inserted into the positioning recesses 43 and 44 simultaneously.
  • the other end 12C2 of the substantially annular guide portion 12C abuts on the bottom surface of the positioning recess 43, 44, the insertion of the sleeves 12, 22 is completed.
  • the plurality of positioning ribs 12D abut the inner surfaces of the positioning recesses 43 and 44 in each direction, it is possible to position the sleeves 12 and 22 with high accuracy in the X direction and the Z direction orthogonal thereto.
  • the other ends 12C2 and 22C2 of the substantially annular guide portions 12C and 22C abut on the bottom surfaces of the positioning recesses 43 and 44, whereby the sleeves 12 and 22 can be positioned with high accuracy in the Y direction. Therefore, the other end faces 12b and 22b of the light guide paths 12A and 22A can be set at a fixed position in the housing 40, and the other end faces 12b and 22b and the end faces of the optical fibers 51 and 52 on the plug side can be constantly used. It can be attached so as to provide the opposite spacing as designed between 51a and 52a. Therefore, an optical connector with high light transmission efficiency can be obtained.
  • the light emitting module 10 and the light receiving module 20 fix the fixing regions 41 and 42 in the housing 40.
  • the light emitting module 10 and the light receiving module 20 are attached with the frame shaped ribs 11a and 21a for positioning directed in the Y1 direction in the drawing. That is, as shown in FIG. 1, when the light emitting module 10 and the light receiving module 20 are attached, they are formed inside the frame shaped ribs 11a and 21a and on the surface of the bases 11A and 21A at one end of the sleeves 12 and 22 on the Y2 side.
  • the positioning convex portions 12C1 and 22C1 abut.
  • the light emitting module 10 and the light receiving module 20 are fixed in the fixing regions 41 and 42 in such a state of being in contact with each other.
  • the facing distance between the light emitting element 11 and the light receiving element 21 provided in the light emitting module 10 and the light receiving module 20 and the lenses 12B and 22B on the sleeve 12 and 22 side, or the case where the convex lenses 13 and 23 are provided. Can be mounted so that the facing distance between the convex lenses 13 and 23 and the lenses 12B and 22B on the sleeve 12 and 22 side is always constant. Therefore, an optical connector with high light transmission efficiency can be obtained.
  • the attachment accuracy of the sleeves 12 and 22, the light emitting module 10, the light receiving module 20 and the optical fibers 51 and 52 can be enhanced in the X axis direction, an optical connector with high light transmission efficiency is provided. be able to.
  • the said sleeves 12 and 22 can be shared to the light emission module 10 and the light reception module 20 with the same shape, it is also possible to reduce the manufacturing cost of an optical connector.
  • FIG. 8 of Patent Document 1 an aspect shown in FIG. 8 of Patent Document 1, that is, an optical connector for optically connecting a light emitting optical element and a fiber, and a diameter of the conical light guide path facing the end face of the optical fiber
  • the lens is integrally formed on the large size side
  • light is efficiently transmitted from the lens to the end face of the fiber in the vicinity of the central optical axis (central axis of the light guide), but larger than the core diameter of the optical fiber
  • the maximum diameter of the lens that is, the light emitted from the lens does not enter the end face of the fiber and becomes leaked light, which tends to reduce the transmission efficiency as a whole.
  • Means for solving the above problems are shown in the following second embodiment.
  • FIG. 4 shows a second embodiment of the present invention, and is an enlarged sectional view showing the relationship between an optical module, a sleeve and an optical fiber provided in an optical connector.
  • the configuration in the optical connector shown in FIG. 4 is the same as that of the first embodiment except for a part, and the diameter dimension of the light guide paths 12A and 22A forming the sleeves 12 and 22 is opposite to the end face of the optical fiber
  • the only difference is that convex lenses 12E and 22E are provided on the small end faces 12b and 22b. Further, the diameters of the convex lenses 12E and 22E are formed substantially the same as the core diameter of the optical fiber.
  • the convex lenses 12E and 22E are provided on the end faces of the light guide paths 12A and 22A facing the end faces 51a and 51a of the optical fibers 51 and 52, in the case of the light emitting module 10, in particular, the convex lenses 12E. Since it becomes easy to condense the light radiate
  • the configuration in which both the light emitting module 10 and the light receiving module 20 are included in one housing 40 has been described.
  • the present invention is not limited thereto. Alternatively, only one light emitting module 10 or only the other light receiving module 20 may be provided.
  • FIG. 2 is an enlarged sectional view showing the relationship between an optical module, a sleeve and an optical fiber provided in the optical connector of FIG. 1.
  • A is a cross-sectional view showing a sleeve on the light receiving module side
  • B is a graph showing the range of the optimum inclination angle of the light guide of the light receiving module side sleeve.
  • the expanded sectional view which shows the 2nd Embodiment of this invention, and shows the relationship of the optical module provided in an optical connector, a sleeve, and an optical fiber.
  • Optical connector 10 Light emitting module (optical module) 11 Light emitting element (optical element) 12 sleeve 12A light guide path 12B lens 12C guide portion 12D positioning rib 12E convex lens 12c flange portion 13 convex lens 20 light receiving module (optical module) 21 light receiving element (optical element) Reference Signs List 22 sleeve 22A light guide 22B lens 22C guide 22D guide rib 22E convex lens 22c flange 23 convex lens 40 housing 41, 42 fixed area 43, 44 positioning recess 45, 46 insertion recess 47, 48 through hole 51, 52 light Fiber 51a, 52a Optical fiber end face

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

Abstract

L'invention porte sur un connecteur optique avec lequel une perte est réduite et un rendement de transmission de lumière est augmenté. Si l'on définit par (θ) un angle de divergence entre une ligne centrale axiale (O-O) et une ligne droite (P) reliant une partie de base (P1) d'une partie rebord (22c) qui fait saillie latéralement à partir d'un côté d'une ligne de conduction de lumière (22A) se présentant sous la forme d'un manchon (22) et une partie de dimension externe maximale (P2) d'une lentille (22B), alors, lorsque l'angle de divergence (θ) est réglé à pas moins de 30° et à moins de 90°, la lumière émise à partir de la lentille (22B) peut être détectée par un photorécepteur (21) sans fuite à partir de celui-ci, même à proximité de la dimension externe maximale de la lentille (22B) loin de la ligne centrale axiale (O-O). En conséquence, la perte du connecteur optique dans son ensemble peut être réduite et son rendement de transmission peut être augmenté.
PCT/JP2009/060829 2008-06-20 2009-06-15 Connecteur optique WO2009154160A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008-161733 2008-06-20
JP2008161733 2008-06-20

Publications (1)

Publication Number Publication Date
WO2009154160A1 true WO2009154160A1 (fr) 2009-12-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2009/060829 WO2009154160A1 (fr) 2008-06-20 2009-06-15 Connecteur optique

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WO (1) WO2009154160A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3093934A1 (fr) * 2015-05-13 2016-11-16 Ricoh Company Ltd. Dispositif optique et appareil d'irradiation de lumière

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003014987A (ja) * 2001-06-28 2003-01-15 Kyocera Corp 光路変換体及びその実装構造並びに光モジュール
JP2003177286A (ja) * 2001-12-11 2003-06-27 Hosiden Corp 双方向光通信用光学部品
WO2007013563A1 (fr) * 2005-07-29 2007-02-01 Ccs Inc. Appareil optique et dispositif de rayonnement lumineux
JP2007155973A (ja) * 2005-12-02 2007-06-21 Seiko Epson Corp 光モジュールの調芯方法、光モジュールの製造方法
JP3958891B2 (ja) * 1999-04-23 2007-08-15 矢崎総業株式会社 光コネクタ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3958891B2 (ja) * 1999-04-23 2007-08-15 矢崎総業株式会社 光コネクタ
JP2003014987A (ja) * 2001-06-28 2003-01-15 Kyocera Corp 光路変換体及びその実装構造並びに光モジュール
JP2003177286A (ja) * 2001-12-11 2003-06-27 Hosiden Corp 双方向光通信用光学部品
WO2007013563A1 (fr) * 2005-07-29 2007-02-01 Ccs Inc. Appareil optique et dispositif de rayonnement lumineux
JP2007155973A (ja) * 2005-12-02 2007-06-21 Seiko Epson Corp 光モジュールの調芯方法、光モジュールの製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3093934A1 (fr) * 2015-05-13 2016-11-16 Ricoh Company Ltd. Dispositif optique et appareil d'irradiation de lumière
US9859681B2 (en) 2015-05-13 2018-01-02 Ricoh Company, Ltd. Optical device and light irradiation apparatus

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