WO2011162173A1 - 光コネクタ - Google Patents
光コネクタ Download PDFInfo
- Publication number
- WO2011162173A1 WO2011162173A1 PCT/JP2011/063883 JP2011063883W WO2011162173A1 WO 2011162173 A1 WO2011162173 A1 WO 2011162173A1 JP 2011063883 W JP2011063883 W JP 2011063883W WO 2011162173 A1 WO2011162173 A1 WO 2011162173A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ferrule
- optical connector
- key
- housing
- connector
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3801—Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
-
- 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
- G02B6/3851—Ferrules having keying or coding means
-
- 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
- G02B6/3863—Details of mounting fibres in ferrules; Assembly methods; Manufacture fabricated by using polishing techniques
-
- 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
- G02B6/3869—Mounting ferrules to connector body, i.e. plugs
- G02B6/3871—Ferrule rotatable with respect to plug body, e.g. for setting rotational position ; Fixation of ferrules after rotation
Definitions
- the present invention relates to an optical connector including a ferrule whose front end portion is obliquely polished.
- FIG. 9A is a side view showing a conventional optical connector 500 with a part thereof cut away
- FIG. 9B is a perspective view of a ferrule 503 included in the optical connector 500
- FIG. 4 is a cross-sectional view of a plug frame (housing) 501 included in the connector 500.
- the ferrule 503 accommodated in the cylindrical plug frame 501 has a flange 505 on the outer periphery thereof.
- the plug frame 501 is slid in the axial direction by engagement between a keyway 507 ((b) region) formed in the flange 505 and a key 509 ((c) region) protruding inside the plug frame 501. It is allowed and rotation around the axis is restricted.
- ferrule 503 is urged toward the joining end surface 503a by a spring 511 built in the plug frame 501. Further, the flange 505 abuts against a stopper wall 515 protruding in the ferrule housing hole 513 inside the plug frame 501, so that further forward protrusion in the connecting direction is prevented.
- the ferrule 503 is adapted to butt-connect with a ferrule of another optical connector through a joining end surface 503a, whereby the optical fiber 517 terminated so as to be connector-connectable by the ferrule 503 is connected to the other side of the optical fiber 517. Connected to the optical line of the connector. Further, the ferrule 503 can be slightly pushed rearward in the connection direction within the elastic deformation range of the spring 511 at the time of abutting with the ferrule of the counterpart optical connector. As a result, damage to the joint end surface 503a due to extreme stress concentration is prevented, and the biasing force of the spring 511 acts as a butting force between the ferrules, so that the desired connection loss can be stably obtained. .
- An object of the present invention is to provide an optical connector capable of suppressing the disconnection when an external force is applied to the connector while preventing rotation of the ferrule in the oblique polishing type optical connector.
- the ferrule includes a ferrule whose tip end is obliquely polished, a housing that accommodates and holds the ferrule so as to be movable in the axial direction, and elastic means that biases the ferrule forward in the connection direction. And a key groove that fits so that both of them can move relative to each other in the axial direction, and a key groove that increases the clearance between the key groove and the key in the direction in which the ferrule moves backward.
- An optical connector comprising a key is provided. It is preferable that the permissible rotation amount in the circumferential direction around the axis determined by the keyway and the key is the same before and after the ferrule is retracted.
- optical connector of the present invention it is possible to prevent the connection from being disconnected when an external force is applied to the connector while preventing rotation of the ferrule in the oblique polishing type optical connector.
- FIG 1 is an external perspective view of an embodiment of an optical connector according to the present invention.
- FIG. 1 It is a perspective view of the mechanical splice which the optical connector shown in FIG. 1 contains.
- FIG. 1 It is a perspective view of the housing which the optical connector shown in FIG. 1 contains.
- a region is a perspective view showing the housing shown in FIG. 4 in a state where the housing is cut out along a plane including an axis, and (b) region is a partially enlarged view of (a) region.
- Each of (a) and (b) is a schematic diagram of a main part before and after the ferrule is retracted in the optical connector shown in FIG. 1, and (c) is a schematic diagram of a main part when the ferrule is swung in the optical connector shown in FIG. FIG.
- (A) is a side view showing a conventional optical connector with a part cut away
- (b) is a perspective view of a ferrule included in the conventional optical connector
- (c) is a conventional optical connector. It is sectional drawing of the plug frame containing.
- FIG. 1 is an external perspective view of an optical connector 17 according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the main part of the optical connector 17.
- FIG. 3 is a perspective view of the mechanical splice 33 included in the optical connector 17.
- the optical connector 17 is roughly divided into a mechanical splice 33, a housing 19 that houses and holds the mechanical splice 33, and a knob 35 that is attached to the outside of the housing 19 and serves as a gripping portion when the connector is connected.
- the mechanical splice 33 includes a ferrule 15, a base member 37, a fixing portion 39, and a clamper 41 that fixes an optical fiber (not shown) by pressing a lid (not shown) against the base member 37.
- the ferrule 15 has a fine hole 43 into which an optical fiber is inserted, and is accommodated with the ferrule accommodation hole 45 on the inner side of the housing 19 so that their center axes substantially coincide with each other.
- the ferrule 15 is formed using zirconia or glass.
- the front end portion 11 where the fine holes 43 of the ferrule 15 are opened is obliquely polished.
- the ferrule 15 is housed and held in the housing 19 along the axis 31 in a state in which a biasing force is applied in the direction of the distal end portion 11 by an unillustrated elastic means (for example, a spring) built in the housing 19. It can move in the direction.
- a flange 47 is formed at a substantially central portion in the axial direction of the ferrule 15. The ferrule 15 is prevented from further protruding forward in the connecting direction by the flange 47 coming into contact with the stopper wall 51 (FIG. 5) protruding in the ferrule housing hole 45.
- the ferrule 15 When the ferrule 15 is abutted with the ferrule of another optical connector with the tip portion 11, the optical fiber terminated by the ferrule 15 is connected to the optical line of the other optical connector. Further, the ferrule 15 is pushed rearward in the connection direction within the deformation range of the elastic means at the time of abutting with the ferrule of the counterpart optical connector. As a result, damage to the joint end face due to extreme stress concentration is prevented, and the biasing force of the elastic means acts as a butting force between the ferrules, so that the desired connection loss can be stably obtained.
- FIG. 4 is a perspective view of the housing 19 included in the optical connector 17.
- 5A is a perspective view showing the housing 19 in a state in which the housing 19 is cut out along the plane including the axis
- FIG. 5B is a partially enlarged view of the region (a).
- the optical connector 17 includes a key groove 21 and a key 23 that are fitted between the housing 19 and the ferrule 15 so that the two can be relatively moved in the moving direction.
- the key groove 21 and the key 23 may be provided on either side of the housing 19 and the ferrule 15. However, in the optical connector 17, the key 23 is provided in the housing 19 and the key groove 21 is provided in the ferrule 15. .
- two pairs of the key groove 21 and the key 23 are provided on both sides in the diameter direction. However, one pair or a plurality of pairs may be provided in the circumferential direction.
- the optical connector 17 is an oblique APC connector that realizes a low connection loss with extremely little reflected return light. That is, in the optical connector 17, the connection end face is provided with an angle and has a convex spherical surface so that the reflected return light can escape to the outside of the fiber.
- the cause of the generation of reflected return light is the discontinuity of the refractive index in the optical path, which is caused by the presence of an air layer at the connection point or a work-affected layer generated by processing the end face of the optical fiber.
- the APC optical connector 17 is selected so that the oblique angle is sufficiently large and the insertion loss is not increased to reduce the reflected return light.
- the problem inherent to APC is the rotation around the axis 31 of the ferrule 15. When the rotational angle shifts, the center of curvature moves. In order to stably connect the APC surface to the PC, it is important to suppress the rotation angle of the ferrule 15 to 2 degrees or less. In order to stabilize the characteristics, the rotation may be zero.
- FIG. 6 (a) region and (b) region are schematic diagrams of main parts before and after the ferrule retreats in the conventional optical connector 500.
- the ferrule 503 is positioned inside the housing 501 so that the ferrule 503 does not rotate. If the clearance C between the key 509 and the key groove 507 is reduced, rotation can be more strictly suppressed.
- the relative angle change between them is also controlled according to the clearance C between the positioning portion and the ferrule 503, so that an external force is applied to the housing 501. The force is directly applied to the PC connection surface of the connector, making the PC connection state unstable and increasing loss.
- FIG. 7A and 7B are schematic diagrams of main parts of the optical connector 17 before and after the retraction of the ferrule
- FIG. 7C is a schematic diagram of main parts of the optical connector 17 when the ferrule is swung.
- the keyway 21 is formed in the flange 47 (FIG. 3) of the ferrule 15 and is parallel to the axis 31.
- the key 23 projects from the stopper wall 51 (FIG. 5) toward the rear side of the housing 19 in the direction along the axis 31, and the key width gradually decreases toward the projecting tip.
- a base end portion 23a having a width d1 substantially equal to the groove width W of the key groove 21 and a base end portion 23a connected to the base end portion 23a via a tapered portion T and having a width d2 narrower than the base end portion 23a. It consists of a portion 23b and a tip chamfered portion 53 (FIG. 5).
- the base end portion 23a of the key 23 is engaged with the key groove 21 until the ferrule 15 and another connector to be opposed are connected to the PC, thereby suppressing rotation and swinging with high accuracy.
- the elastic means is compressed, and the ferrule 15 is retracted by a predetermined distance B (region (b)), the rotation is restricted by the clearance between the base end portion 23a of the key 23 and the key groove 21.
- the clearance between the key groove 21 and the key 23 increases in the direction in which the ferrule moves backward. The allowable amount of change in relative angle with the groove is increased. That is, the ferrule can be swung (region (c)), and even if an external force is applied to the housing 19, an effect of hardly affecting the PC connection is brought about.
- the key groove 21 and the key 23 are configured to have the same rotation allowance in the circumferential direction around the axis 31 before and after the ferrule 15 is retracted. That is, the base end portion 23a is kept engaged with the key groove 21 (FIG. 7B). If the ferrule is retracted and the distance between the key 23 and the key groove 21 is increased, the effect of suppressing the rotation is reduced. Therefore, even if the overlap length in the longitudinal direction is shortened, the clearance is kept small, so that the allowable amount for the change in the relative angle between the key and the keyway is increased while maintaining the rotation suppression. It is easy to swing, and a structure that reduces the influence of external force applied to the housing 19 is realized.
- FIG. 8 is a schematic diagram of a main part of a modification of the optical connector according to the present invention.
- the key groove 21 is a parallel groove and the key 23 is gradually narrowed toward the tip.
- the key 23 is a parallel key 23A
- the key groove 21A is It is good also as a taper groove
- the key groove 21A is moved in the direction in which the ferrule is retracted. Since the clearance between the groove width and the key 23A is increased, the restriction is relaxed (swinging is possible while restricting rotation), and even if an external force is applied to the housing 19, the PC connection is affected. Can be difficult.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
Claims (2)
- 先端部が斜め研磨されたフェルールと、
前記フェルールを軸線方向に移動可能なように収容保持するハウジングと、
前記フェルールを接続方向前方に付勢する弾性手段と
を備え、前記ハウジングと前記フェルールとの間に、両者が前記軸線方向に相対移動可能となるように嵌合するキー溝とキーであって、前記フェルールが後退する方向に向かって前記キー溝と前記キーとの間のクリアランスが増大するキー溝とキーとを備える光コネクタ。 - 請求項1記載の光コネクタであって、
前記キー溝と前記キーとで決まる前記軸線を中心とした円周方向の回転許容量が、前記フェルールの後退前と後退後とで等しい光コネクタ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/805,208 US20130266279A1 (en) | 2010-06-22 | 2011-06-17 | Optical connector |
BR112012033051A BR112012033051A2 (pt) | 2010-06-22 | 2011-06-17 | conector óptico |
JP2012521448A JPWO2011162173A1 (ja) | 2010-06-22 | 2011-06-17 | 光コネクタ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010142001 | 2010-06-22 | ||
JP2010-142001 | 2010-06-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011162173A1 true WO2011162173A1 (ja) | 2011-12-29 |
Family
ID=45371361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/063883 WO2011162173A1 (ja) | 2010-06-22 | 2011-06-17 | 光コネクタ |
Country Status (4)
Country | Link |
---|---|
US (1) | US20130266279A1 (ja) |
JP (1) | JPWO2011162173A1 (ja) |
BR (1) | BR112012033051A2 (ja) |
WO (1) | WO2011162173A1 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8737782B2 (en) * | 2012-09-21 | 2014-05-27 | Browave Corporation | Dynamic optical circulator device |
US9470847B2 (en) * | 2014-06-04 | 2016-10-18 | Tyco Electronics Corporation | Polarization maintaining connectors |
US9880361B2 (en) | 2015-12-19 | 2018-01-30 | Us Conec Ltd. | Field changeable fiber optic connector polarity keying with color coding |
US10712507B2 (en) | 2015-12-19 | 2020-07-14 | US Conec, Ltd | Field changeable fiber optic connector polarity keying |
US9964710B2 (en) | 2016-03-17 | 2018-05-08 | Corning Optical Communications LLC | Tunable optical fiber connector and tuning methods for optical fiber cable assemblies |
US10067299B2 (en) | 2016-06-29 | 2018-09-04 | Corning Optical Communications LLC | Tunable optical fiber connectors and connector and cable sub-assemblies and assemblies |
JP2018081204A (ja) * | 2016-11-16 | 2018-05-24 | 株式会社フジクラ | 偏波保持光ファイバおよび双方向光伝送装置 |
JP7027781B2 (ja) * | 2017-10-04 | 2022-03-02 | 住友電気工業株式会社 | 光コネクタおよび光接続構造 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0233006U (ja) * | 1988-08-26 | 1990-03-01 | ||
JP2003329882A (ja) * | 2002-05-09 | 2003-11-19 | Seiko Instruments Inc | 斜めpcコネクタ |
JP2004151670A (ja) * | 2002-09-06 | 2004-05-27 | Seiko Instruments Inc | 光コネクタプラグ及び光コネクタアダプタ並びに光コネクタ |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6550979B1 (en) * | 2001-10-19 | 2003-04-22 | Corning Cable Systems Llc | Floating connector subassembly and connector including same |
US8337093B2 (en) * | 2009-09-30 | 2012-12-25 | Corning Cable Systems Llc | Fiber optic connectors and methods for making the same |
-
2011
- 2011-06-17 JP JP2012521448A patent/JPWO2011162173A1/ja not_active Withdrawn
- 2011-06-17 WO PCT/JP2011/063883 patent/WO2011162173A1/ja active Application Filing
- 2011-06-17 BR BR112012033051A patent/BR112012033051A2/pt not_active IP Right Cessation
- 2011-06-17 US US13/805,208 patent/US20130266279A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0233006U (ja) * | 1988-08-26 | 1990-03-01 | ||
JP2003329882A (ja) * | 2002-05-09 | 2003-11-19 | Seiko Instruments Inc | 斜めpcコネクタ |
JP2004151670A (ja) * | 2002-09-06 | 2004-05-27 | Seiko Instruments Inc | 光コネクタプラグ及び光コネクタアダプタ並びに光コネクタ |
Also Published As
Publication number | Publication date |
---|---|
JPWO2011162173A1 (ja) | 2013-08-22 |
US20130266279A1 (en) | 2013-10-10 |
BR112012033051A2 (pt) | 2016-12-20 |
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