WO2014038514A1 - Fibre multicœur, et instrument de liaison optique pour fibre monomode - Google Patents

Fibre multicœur, et instrument de liaison optique pour fibre monomode Download PDF

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Publication number
WO2014038514A1
WO2014038514A1 PCT/JP2013/073553 JP2013073553W WO2014038514A1 WO 2014038514 A1 WO2014038514 A1 WO 2014038514A1 JP 2013073553 W JP2013073553 W JP 2013073553W WO 2014038514 A1 WO2014038514 A1 WO 2014038514A1
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WO
WIPO (PCT)
Prior art keywords
fiber
lens
core
single mode
optical connector
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Application number
PCT/JP2013/073553
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English (en)
Japanese (ja)
Inventor
小林　哲也
裕作 鳥取
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株式会社オプトクエスト
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Publication date
Application filed by 株式会社オプトクエスト filed Critical 株式会社オプトクエスト
Priority to JP2014534347A priority Critical patent/JP6219288B2/ja
Publication of WO2014038514A1 publication Critical patent/WO2014038514A1/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
    • G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/32—Optical coupling means having lens focusing means positioned between opposed fibre ends
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02042—Multicore optical fibres

Definitions

  • the present invention relates to an optical connector of a multi-core fiber and a single mode fiber.
  • Patent Document 1 International Publication WO2010 / 038861 pamphlet
  • Patent Document 2 International Publication WO2010 / 038863 pamphlet
  • Non-Patent Document 1 discloses a technique in which a bundle fiber is stretched in a tapered shape and a 7-core multicore fiber and a single mode fiber are coupled. In this technology, multiple single-mode fibers are bundled and stretched, and fusion-bonded with multi-core fibers.
  • Non-Patent Document 1 it is necessary to match the cores of a multi-core fiber and a single mode fiber on the submicron order. For this reason, this method requires extremely high processing accuracy in order to optically connect the multi-core fiber and the single mode fiber.
  • Non-Patent Document 1 uses an adhesive to connect the multi-core fiber and the single mode fiber. For this reason, even if an optical optical connector is obtained by this method, it cannot be used for applications in which communication is performed using high-power light. It is also necessary to consider how to deal with deterioration of the adhesive over time. Furthermore, since this method bundles and extends a plurality of single mode fibers, there is a problem that the strength of the fibers is impaired.
  • an object of the present invention is to provide a multi-core fiber and a single mode fiber optical connector that can handle high-power input light without requiring high processing accuracy and that has sufficient strength.
  • the end face of a multi-core fiber is arranged near the focal point of one lens system, and further, a roof-type prism and a lens array are arranged so that the emitted light from each core of the multi-core fiber is collimated light. Based on the knowledge that light from each core can be guided to the corresponding single-mode fiber core.
  • the diameter of a multi-core fiber is smaller than the diameter of an assembly of a plurality of single mode fibers.
  • the optical connector of the present invention can be separated by widening the light flux interval from each multi-core fiber core and leading to a corresponding single mode fiber.
  • the present invention relates to an optical connector of a multi-core fiber and a single mode fiber.
  • This optical connector includes a first lens 15, a second lens 17, and a lens array 19.
  • the optical connector can guide the light from each core of the multi-core fiber to the corresponding single mode fiber.
  • the emitted light from the plurality of cores 13 a and 13 b included in the multicore fiber 11 enters the first lens 15. Then, light emitted from the first lens 15 enters the second lens 17. Light emitted from the second lens 17 enters the lens array 19. Light emitted from the constituent lenses 21a, 21b, and 21c included in the lens array 19 enters the corresponding single mode fibers 23a, 23b, and 23c.
  • the optical connector of the present invention can optically connect the multi-core fiber and the single mode fiber.
  • the optical connector of the present invention is composed of the optical elements as described above. For this reason, incident light in an arbitrary direction and outgoing light in an arbitrary direction can be handled. Moreover, since no adhesive or resin material is included in the optical path, high power light can be handled.
  • the end face 12 of the multi-core fiber 11 is disposed at the focal position of the first lens 15.
  • the second lens 17 is installed at a position where the emitted light emitted radially from the first lens 15 can be incident.
  • the second lens 17 emits a plurality of lights from the plurality of cores 13 a and 13 b included in the multicore fiber 11 as collimated light.
  • the optical connector of this aspect allows the light from the outer core of the multi-core fiber to pass through the off-axis portion of the second lens 17, thereby increasing the distance between the light from the multi-core fiber and the single pitch having a wide pitch interval. Light can be propagated to the mode fiber.
  • the second lens 17 is a roof prism.
  • the constituent lenses 21a, 21b, and 21c receive light from any of the plurality of cores 13a and 13b.
  • the second aspect of the present invention relates to an optical communication system including any one of the optical connectors described above.
  • This optical communication system includes one of the optical connectors described above, a multi-core fiber 11 and single mode fibers 23a, 23b, and 23c.
  • optical connector of the present invention can be composed of optical elements, it does not require high processing accuracy, can handle high-power input light, and has sufficient strength for multi-core fibers and single-mode fibers.
  • a connector can be provided.
  • FIG. 1 is a conceptual diagram for explaining the elements of the present invention.
  • FIG. 2A is a diagram illustrating a cross-sectional example of a seven-core multicore fiber.
  • FIG. 2B is a diagram showing a cross-sectional example of a 19-core multi-core fiber.
  • FIG. 3 is a conceptual diagram showing elements of the optical connector in the embodiment.
  • FIG. 1 is a conceptual diagram for explaining elements of the present invention.
  • the multi-core fiber and single mode fiber optical connector of the present invention includes a first lens 15, a second lens 17, a lens array 19, Have
  • the emitted light from the plurality of cores 13 a and 13 b included in the multicore fiber 11 enters the first lens 15. Then, light emitted from the first lens 15 enters the second lens 17. Light emitted from the second lens 17 enters the lens array 19. Light emitted from the constituent lenses 21a, 21b, and 21c included in the lens array 19 enters the corresponding single mode fibers 23a, 23b, and 23c.
  • the optical connector of the present invention can optically connect the multi-core fiber and the single mode fiber.
  • Multi-core fiber and single-mode fiber optical connectors mean optical connectors that can transmit output light from multi-core fibers having a plurality of cores to single-mode fibers corresponding to each core.
  • the number of cores of a multi-core fiber is n
  • light from the multi-core fiber is transmitted to n single mode fiber groups.
  • the single mode fiber group may be constituted by a plurality of cores and clads existing inside one coating, or may be a bundle of a plurality of single mode fibers.
  • the multi-core fiber 11 is an optical fiber including a plurality of cores in one fiber as disclosed in the patent documents and non-patent documents described above.
  • An example of the multi-core fiber 11 is a fiber having a central core and one or more cores existing around the central core.
  • the multi-core fiber 11 does not necessarily have a core at the center.
  • the multi-core fiber of the present invention may be a multi-core fiber having a core in which 2 to 4 (or more) cores are arranged symmetrically.
  • FIG. 2 (a) is a diagram showing a cross-sectional example of a seven-core multicore fiber.
  • FIG. 2B is a diagram showing a cross-sectional example of a 19-core multi-core fiber.
  • 13a represents the central core
  • 13b represents the surrounding core.
  • the central core means a core existing at the center position of the multi-core fiber.
  • the distance between the cores is, for example, 20 ⁇ m or more and 60 ⁇ m or less.
  • the distance between cores means the distance from the center of a core to the center of an adjacent core.
  • the first lens 15 is a convex lens. If the first lens is a convex lens, the interval between the light beams emitted from the multi-core fiber can be diffused (the diameter of the light beam can be increased).
  • the end face 12 of the multi-core fiber 11 is disposed at the focal position of the first lens 15.
  • the central core 13 a of the multi-core fiber is disposed at the focal position of the first lens 15.
  • the second lens 17 is a lens into which the light emitted from the first lens 15 enters. Therefore, the second lens 17 is installed at a position where the emitted light emitted radially from the first lens 15 can enter.
  • the second lens 17 is a lens for preventing the diameter of the light beam whose diameter is expanded by the first lens 15 from expanding beyond the diameter of the bundle of single mode fibers.
  • the optical connector of this aspect allows the light from the outer core of the multi-core fiber to pass through the off-axis portion of the second lens 17 to increase the distance between the light from the multi-core fiber and to increase the single pitch with a wide pitch interval. Light can be propagated to the mode fiber.
  • the second lens 17 is a roof-type prism (trapezoid prism).
  • the roof prism is known as disclosed in, for example, Japanese Patent Application Laid-Open No. 2010-256929.
  • light from the central core 13a of the multi-core fiber enters the position 18a corresponding to the roof portion (vertex portion) of the roof-type prism.
  • light from the surrounding core 13b of the multi-core fiber enters the oblique portion 18b of the roof of the roof-type prism.
  • the second lens 17 can emit a plurality of collimated lights from the plurality of cores 13a and 13b included in the multi-core fiber 11 as light arranged in parallel.
  • the lens array 19 condenses the emitted light from the second lens 17 such as a roof prism onto the corresponding single mode fibers 23a, 23b, and 23c.
  • Each of the constituent lenses 21a, 21b, and 21c constituting the lens array 19 may be a convex lens.
  • light from any of the plurality of cores 13a and 13b is incident on the constituent lenses 21a, 21b, and 21c.
  • single-mode fibers (cores) corresponding to the constituent lenses 21a, 21b, and 21c are arranged at the focal positions of the constituent lenses 21a, 21b, and 21c.
  • the constituent lenses 21a, 21b, and 21c can reduce the diameters of the light beams derived from the cores 13a and 13b.
  • the second aspect of the present invention relates to an optical communication system including any one of the optical connectors described above.
  • This optical communication system includes one of the optical connectors described above, a multi-core fiber 11 and single mode fibers 23a, 23b, and 23c.
  • This optical communication system only needs to have elements that a normal optical communication system has. Then, as in a normal optical communication system, information transmitted from the transmitting station can be transmitted to the receiving station via the multicore fiber and the single mode fiber.
  • FIG. 3 is a diagram showing an embodiment of the present invention, in which 31 is a multi-core fiber, 311 is a center core, 312 is an outer core, 32 is a single lens system, 33 is a roof prism, 34 is a lens array, 35 is A single mode fiber array 351 indicates a single mode fiber.
  • Light emitted from the center core 311 of the multicore fiber 31 placed parallel to the optical axis of the lens system 32 and at the front focal position thereof is collimated by the lens system 32 and travels coaxially with the optical axis of the lens system 32.
  • the collimated light passes through the center of the prism 33, enters the lens at the center of the lens array 34, and is input to the single mode fiber 351 at the center of the single mode fiber array 35.
  • the light emitted from the outer core 312 is emitted as collimated light passing through the rear focal point by the lens system 32 and enters the wedge portion of the prism 33.
  • the wedge angle is polished to an angle that is parallel to the optical axis of the lens array after the incident collimated light is transmitted.
  • the collimated light is incident on the lens on the outer periphery of the lens array 34, and the outer periphery of the single mode fiber array. To the single mode fiber 352.
  • the multi-core fiber 31 has a core-to-core spacing of 45 ⁇ m, seven cores, and a mode field diameter (MFD) of 10 ⁇ m (@ 1550 nm).
  • the lens 32 has a small off-axis aberration, a focal length of 1 A 12 mm aspheric lens was used.
  • the wedge angle of the prism 33 for making the emission angle parallel to the optical axis of the lens array 34 by the prism 33 can be calculated by Snell's law, and is 4.47 °.
  • the material of the prism was BK7, which has almost no absorption in the wavelength 1550 nm band.
  • the array interval between the lens array 34 and the fiber array 35 was 500 ⁇ m.
  • the focal length of the lens array 34 is 1.12 mm because the MDF of the single mode fiber is equivalent to the MDF of the multicore fiber.
  • the present invention can be used in the fields of optical equipment and optical information communication.

Abstract

L'invention fournit une fibre multicœur et un instrument de liaison optique pour fibre monomode. Cet instrument de liaison optique possède une première lentille (15), une seconde lentille (17) et un réseau de lentilles (19). La lumière émise en sortie provenant d'une pluralité de cœurs (13a, 13b) contenus dans la fibre multicœur (11), est incidente sur la première lentille (15). En outre, la lumière émise en sortie provenant de la première lentille (15), est incidente sur la seconde lentille (17). La lumière émise en sortie provenant de la seconde lentille (17), est incidente sur le réseau de lentilles (19). La lumière émise en sortie provenant de lentilles constitutives (21a, 21b, 21c) contenues dans le réseau de lentilles (19), est incidente sur des fibres monomodes (23a, 23b, 23c) correspondantes. Ainsi, l'instrument de liaison optique de l'invention permet de connecter optiquement la fibre multicœur et les fibres monomodes.
PCT/JP2013/073553 2012-09-06 2013-09-02 Fibre multicœur, et instrument de liaison optique pour fibre monomode WO2014038514A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014534347A JP6219288B2 (ja) 2012-09-06 2013-09-02 マルチコアファイバとシングルモードファイバの光接続器

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JP2012-196391 2012-09-06
JP2012196391 2012-09-06

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016133516A (ja) * 2015-01-15 2016-07-25 株式会社日立製作所 マルチコアファイバ接続装置およびシステム
US9664859B2 (en) 2014-07-28 2017-05-30 Citizen Watch Co., Ltd. Optical fiber connector, optical module, and fabricating method thereof
US20220091346A1 (en) * 2019-01-25 2022-03-24 Sony Group Corporation Optical connector, optical cable, and electronic apparatus
US11402585B2 (en) 2019-03-05 2022-08-02 Sumitomo Electric Industries, Ltd. Optical connection structure
DE102022107005A1 (de) 2022-03-24 2023-09-28 Huber+Suhner Cube Optics Ag Optischer Multikoppler mit Korrekturelement und Herstellungsverfahren hierfür

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6864666B2 (ja) 2018-12-25 2021-04-28 株式会社フジクラ コネクタシステム、光接続方法及び光接続部材

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Publication number Priority date Publication date Assignee Title
JPH0821927A (ja) * 1994-07-08 1996-01-23 Ricoh Opt Ind Co Ltd 光情報合成光学装置
JP2012042819A (ja) * 2010-08-20 2012-03-01 Fujikura Ltd レーザダイオードモジュール及びレーザ光源
WO2012172968A1 (fr) * 2011-06-17 2012-12-20 住友電気工業株式会社 Dispositif optique
WO2013031836A1 (fr) * 2011-09-01 2013-03-07 コニカミノルタアドバンストレイヤー株式会社 Système de couplage optique et procédé de couplage

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0821927A (ja) * 1994-07-08 1996-01-23 Ricoh Opt Ind Co Ltd 光情報合成光学装置
JP2012042819A (ja) * 2010-08-20 2012-03-01 Fujikura Ltd レーザダイオードモジュール及びレーザ光源
WO2012172968A1 (fr) * 2011-06-17 2012-12-20 住友電気工業株式会社 Dispositif optique
WO2013031836A1 (fr) * 2011-09-01 2013-03-07 コニカミノルタアドバンストレイヤー株式会社 Système de couplage optique et procédé de couplage

Non-Patent Citations (2)

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Title
SAKAGUCHI JUN ET AL.: "Propagation characteristics of seven-core fiber for spatial and wavelength division multiplexed 10-Gbit/s channels", OPTICAL FIBER COMMUNICATION CONFERENCE AND EXPOSITION (OFC/NFOEC), 2011 AND THE NATIONAL FIBER OPTIC ENGINEERS CONFERENCE, March 2011 (2011-03-01) *
SAKAGUCHI JUN ET AL.: "Space Division Multiplexed Transmission of 109-Tb/s Data Signals Using Homogeneous Seven-Core Fiber", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 30, no. 4, 15 February 2012 (2012-02-15), pages 658 - 665 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9664859B2 (en) 2014-07-28 2017-05-30 Citizen Watch Co., Ltd. Optical fiber connector, optical module, and fabricating method thereof
JP2016133516A (ja) * 2015-01-15 2016-07-25 株式会社日立製作所 マルチコアファイバ接続装置およびシステム
US20220091346A1 (en) * 2019-01-25 2022-03-24 Sony Group Corporation Optical connector, optical cable, and electronic apparatus
US11402585B2 (en) 2019-03-05 2022-08-02 Sumitomo Electric Industries, Ltd. Optical connection structure
DE102022107005A1 (de) 2022-03-24 2023-09-28 Huber+Suhner Cube Optics Ag Optischer Multikoppler mit Korrekturelement und Herstellungsverfahren hierfür

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JPWO2014038514A1 (ja) 2016-08-08

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