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WO2014077069A1 - Dispositif multiplexeur optique - Google Patents

Dispositif multiplexeur optique Download PDF

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Publication number
WO2014077069A1
WO2014077069A1 PCT/JP2013/077821 JP2013077821W WO2014077069A1 WO 2014077069 A1 WO2014077069 A1 WO 2014077069A1 JP 2013077821 W JP2013077821 W JP 2013077821W WO 2014077069 A1 WO2014077069 A1 WO 2014077069A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical fiber
optical
lens member
fiber
light
Prior art date
Application number
PCT/JP2013/077821
Other languages
English (en)
Japanese (ja)
Inventor
大登　正敬
Original Assignee
富士電機株式会社
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 富士電機株式会社 filed Critical 富士電機株式会社
Publication of WO2014077069A1 publication Critical patent/WO2014077069A1/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
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2848—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers having refractive means, e.g. imaging elements between light guides as splitting, branching and/or combining devices, 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
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02042—Multicore optical 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
    • G02B6/04—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
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • 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

Definitions

  • the present invention relates to an optical multiplexing device that combines a plurality of lights.
  • Patent Documents 1 and 2 disclose techniques for multiplexing light.
  • the technique described in Patent Document 1 combines light by coupling one end of a plurality of waveguides.
  • the technique described in Patent Document 2 combines light by welding a plurality of optical fibers on the input side to one optical fiber on the output side.
  • Patent Document 3 describes the following optical switch device. First, the light incident surfaces of a plurality of optical fibers on which output light is incident are aligned with each other. Then, by sliding the parabolic mirror parallel to these incident surfaces, the optical fiber on which light is incident is switched.
  • Patent Document 4 describes that light emitted from a light source is collimated using a reflecting surface having a curved surface.
  • an object of the present invention is to provide a compact optical multiplexer.
  • the optical multiplexer includes a plurality of first optical fibers, second optical fibers, lens members, and third optical fibers.
  • the second optical fiber has a plurality of cores.
  • the plurality of first optical fibers are optically connected to different cores of the second optical fiber at one end of the second optical fiber.
  • the lens member is opposed to the other end of the second fiber.
  • One end of the third optical fiber is opposed to the other end of the second fiber via the lens member.
  • the optical multiplexing device can be miniaturized.
  • FIG. 1 is a cross-sectional view illustrating a configuration of an optical multiplexing device 10 according to the first embodiment.
  • the optical multiplexing device 10 according to the present embodiment includes a plurality of first optical fibers 110, a second optical fiber 120, a lens member 130, and a third optical fiber 140.
  • the second optical fiber 120 has a plurality of cores 122. At one end 124 of the second optical fiber 120, the plurality of first optical fibers 110 are optically connected to different cores 122.
  • the lens member 130 faces the other end 126 of the second optical fiber 120.
  • the third optical fiber 140 has one end 144 opposed to the other end 126 of the second optical fiber 120 via the lens member 130. Details will be described below.
  • the first optical fiber 110 is a single mode fiber, for example, and has one core 112. However, the first optical fiber 110 may be a multimode fiber. In the present embodiment, one end 114 of the first optical fiber 110 is joined to one end 124 of the second optical fiber 120. However, the one end 114 of the first optical fiber 110 and the one end 124 of the second optical fiber 120 may be optically connected via a connector.
  • the one end 114 of the first optical fiber 110 is thinner than the other part of the first optical fiber 110 because it is melted and stretched when it is joined to the one end 124 of the second optical fiber 120. Further, the core 112 of the first optical fiber 110 is joined to the core 122 of the second optical fiber 120.
  • the number of first optical fibers 110 is the same as the number of cores 122 of the second optical fiber 120, but may be smaller than the number of cores 122.
  • the second optical fiber 120 is a multi-core fiber having a plurality of cores 122.
  • a multi-core fiber used for communication can be used.
  • the plurality of cores 122 are parallel to each other.
  • the lens member 130 condenses the light emitted from the plurality of cores 122 on one end 144 of the third optical fiber 140.
  • the lens member 130 is made of a translucent material, one end 132 is joined to the other end 126 of the second optical fiber 120, and the other end 134 is a curved surface. In this way, the coupling loss of light can be reduced.
  • the curved surface of the other end 134 is a paraboloid, for example.
  • the lens member 130 is formed using, for example, a graded index fiber. In this case, one end 132 of the lens member 130 and the other end 126 of the second optical fiber 120 are welded.
  • the other end 134 of the lens member 130 is formed into a curved surface by polishing, for example. However, the other end 134 may be processed into a curved surface by, for example, arc discharge.
  • the lens member 130 is formed using a graded index fiber, the one end 132 of the lens member 130 can be easily joined to the other end 126 of the second optical fiber 120.
  • the third optical fiber 140 is, for example, a single mode fiber and has one core 142. However, the third optical fiber 140 may be a multimode fiber. The third optical fiber 140 is preferably arranged so that a portion of the core 142 positioned at the one end 144 overlaps the focal point of the lens member 130.
  • the optical multiplexing device 10 includes a holding member 150.
  • the holding member 150 holds the other end 126 of the second optical fiber 120, the third optical fiber 140, and one end 144 of the third optical fiber 140.
  • the second optical fiber 120, the lens member 130, and the third optical fiber 140 are fixed so that the central axes overlap each other.
  • the holding member 150 is, for example, a cylindrical member, and the inner wall holds the other end 126 of the second optical fiber 120, the third optical fiber 140, and one end 144 of the third optical fiber 140.
  • the holding member 150 is cylindrical and the inner diameter thereof is equal to the diameter of the second optical fiber 120. Or slightly smaller.
  • FIG. 2 is a cross-sectional view of the second optical fiber 120.
  • the second optical fiber 120 has a plurality of cores 122.
  • one core 122 is disposed on the central axis of the second optical fiber 120, and the remaining cores 122 are disposed on a circumference centered on the central axis of the second optical fiber 120. ing.
  • the same number of first optical fibers 110 as the number of cores 122 is provided. However, the number of first optical fibers 110 may be smaller than the number of cores 122.
  • the first optical fiber 110 is connected to the core 122 positioned on the central axis of the second optical fiber 120, and the first optical fiber 110 is connected to any one of 122 positioned other than the central axis of the second optical fiber 120.
  • the plurality of cores 122 are disposed in the clad 127.
  • the clad 127 is covered with a protective film 128.
  • a method for joining the plurality of first optical fibers 110 and the second optical fibers 120 will be described.
  • a plurality of first optical fibers 110 are bundled.
  • the bundle of the plurality of first optical fibers 110 is partially heated and stretched. Thereby, the bundle
  • the bundle of the plurality of first optical fibers 110 is cut at the thinned portion. This cut surface becomes one end 114 of the first optical fiber 110.
  • one end 114 of the first optical fiber 110 and one end 124 of the second optical fiber 120 are melt-bonded.
  • the diameter of the mode field of the core 112 is increased by heating the core 112 positioned at the one end 114 of the first optical fiber 110. For this reason, the coupling loss between the first optical fiber 110 and the second optical fiber 120 is low.
  • FIG. 3 is a diagram for explaining an example of use of the optical multiplexing device 10.
  • Light enters the plurality of first optical fibers 110 from the light source 200.
  • the light source 200 has a laser light source, for example.
  • At least one light source 200 may further include a wavelength conversion element. That is, the plurality of light sources 200 may emit light having the same wavelength, or at least one light source 200 may emit light having a wavelength different from that of the other light sources 200.
  • the light incident on the first optical fiber 110 from the light source 200 enters the core 122 of the second optical fiber 120 from one end 114 of the first optical fiber 110.
  • the light incident on the core 122 enters the lens member 130 from the other end 126 of the second optical fiber 120.
  • the light incident on the lens member 130 enters the core 142 located at one end 144 of the third optical fiber 140 via the lens member 130.
  • the core 142 located at the one end 144 of the third optical fiber 140 coincides with the focal point of the lens member 130, the light emitted from the other end 126 of the second optical fiber 120 is highly efficient and the third light.
  • the light enters the core 142 of the fiber 140.
  • the lens member 130 is formed using a graded index fiber, the light propagating through the center of the lens member 130 spreads in the mode field but converges near the exit end face due to the influence of the refractive index distribution. To come. For this reason, the light emitted from the core 122 located on the central axis of the second optical fiber 120 is collected without being deviated from the central axis of the third optical fiber 140.
  • the light emitted from the core 122 located in the peripheral portion of the second optical fiber 120 propagates in the peripheral portion of the lens member 130. Since the graded index fiber has a high refractive index at the central portion and a low refractive index at the peripheral portion, the light propagating through the peripheral portion of the lens member 130 is gradually bent toward the central portion. Further, the light is refracted in the direction of entering the core 142 of the third optical fiber 140 when emitted from the other end 134 of the lens member 130.
  • the coupling efficiency in the optical multiplexing device 10 is about 60%, for example.
  • the apparatus including the light source 200 and the optical multiplexing device 10 includes, for example, an optical signal transmission device, a light source for a spectroscopic measurement device and a spectroscopic analysis device, a light source for a laser processing device, a light source for a laser microscope, a light source for a DNA analysis device, and an endoscope It is used as a light source for an eye fundus or a fundus examination apparatus.
  • the optical multiplexer 10 can be made small.
  • the light incident surface of the first optical fiber 110 and the light output surface of the third optical fiber 140 can be positioned to face each other, the light incident direction with respect to the optical multiplexing device 10 and the optical multiplexing The emission direction of light from the device 10 can be matched.
  • FIG. 4 is a cross-sectional view illustrating a configuration of the optical multiplexing device 10 according to the second embodiment.
  • the optical multiplexing device 10 according to the present embodiment has the same configuration as that of the optical multiplexing device 10 according to the first embodiment, except that the other end 134 of the lens member 130 has a shape along a spherical surface. is there. Also according to this embodiment, the same effect as that of the first embodiment can be obtained.
  • FIG. 5 is a cross-sectional view illustrating the configuration of the optical multiplexing device 10 according to the third embodiment.
  • the optical multiplexing apparatus 10 according to the present embodiment has the same configuration as that of the optical multiplexing apparatus 10 according to the first or second embodiment, except that an antireflection film 136 is provided.
  • the antireflection film 136 is provided on the other end 134 of the lens member 130.
  • the antireflection film 136 is a dielectric film, for example, and is formed using a vapor deposition method or the like.
  • the same effect as that of the first embodiment can be obtained. Further, since the antireflection film 136 is formed on the other end 134 of the lens member 130, it is possible to multiplex light with higher efficiency.

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

Abstract

Selon la présente invention, une deuxième fibre optique (120) comprend une pluralité de cœurs (122). A une extrémité de la deuxième fibre optique (120), une pluralité de premières fibres optiques (110) sont chacune connectées optiquement à des cœurs (122) différents. Un élément lentille (130) se trouve en regard de l'autre extrémité (126) de la deuxième fibre optique (120). Une extrémité (144) d'une troisième fibre optique (140) se trouve en regard de l'autre extrémité (126) de la deuxième fibre optique (120), l'élément lentille (130) se situant entre ces deux extrémités. L'extrémité (144) de la troisième fibre optique (140) est disposée de préférence à l'emplacement du foyer de l'élément lentille (130).
PCT/JP2013/077821 2012-11-19 2013-10-11 Dispositif multiplexeur optique WO2014077069A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012252934A JP2014102305A (ja) 2012-11-19 2012-11-19 光合波装置
JP2012-252934 2012-11-19

Publications (1)

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WO2014077069A1 true WO2014077069A1 (fr) 2014-05-22

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JP (1) JP2014102305A (fr)
TW (1) TW201421091A (fr)
WO (1) WO2014077069A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018199339A1 (fr) * 2017-04-28 2018-11-01 株式会社フジクラ Combineur et dispositif laser
JP2019061277A (ja) * 2018-12-18 2019-04-18 株式会社フジクラ コンバイナ、及び、レーザ装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6348861B2 (ja) * 2015-03-17 2018-06-27 日本電信電話株式会社 光伝送装置及び光伝送方法
CN112533726B (zh) * 2018-09-04 2022-11-18 古河电气工业株式会社 焊接方法及焊接装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6247604A (ja) * 1985-08-27 1987-03-02 Furukawa Electric Co Ltd:The マルチコアフアイバの端末部
JPH02216111A (ja) * 1989-02-17 1990-08-29 Nec Corp 半導体レーザモジュール
JPH0727950A (ja) * 1993-05-10 1995-01-31 Sumitomo Electric Ind Ltd レーザ光の照射装置
JP2001068766A (ja) * 1999-08-25 2001-03-16 Nec Corp 光ファイバ増幅装置
JP2003255552A (ja) * 2002-03-06 2003-09-10 Nec Corp レーザ照射装置並びに走査レーザ光を用いた露光方法及び走査レーザ光を用いたカラーフィルタの製造方法
JP2006195097A (ja) * 2005-01-12 2006-07-27 Moritex Corp レンズ付きファイバ及びレンズ付きファイバにおける非球面レンズ形成方法
JP2008216506A (ja) * 2007-03-01 2008-09-18 National Institute Of Advanced Industrial & Technology 光源装置
JP2010286661A (ja) * 2009-06-11 2010-12-24 Sumitomo Electric Ind Ltd ファイバアレイ及びそれを含む光コネクタ
WO2012121320A1 (fr) * 2011-03-09 2012-09-13 古河電気工業株式会社 Procédé de fabrication d'une structure de faisceau, procédé de connexion de fibres, structure terminale de faisceau et structure de connexion de fibres

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6247604A (ja) * 1985-08-27 1987-03-02 Furukawa Electric Co Ltd:The マルチコアフアイバの端末部
JPH02216111A (ja) * 1989-02-17 1990-08-29 Nec Corp 半導体レーザモジュール
JPH0727950A (ja) * 1993-05-10 1995-01-31 Sumitomo Electric Ind Ltd レーザ光の照射装置
JP2001068766A (ja) * 1999-08-25 2001-03-16 Nec Corp 光ファイバ増幅装置
JP2003255552A (ja) * 2002-03-06 2003-09-10 Nec Corp レーザ照射装置並びに走査レーザ光を用いた露光方法及び走査レーザ光を用いたカラーフィルタの製造方法
JP2006195097A (ja) * 2005-01-12 2006-07-27 Moritex Corp レンズ付きファイバ及びレンズ付きファイバにおける非球面レンズ形成方法
JP2008216506A (ja) * 2007-03-01 2008-09-18 National Institute Of Advanced Industrial & Technology 光源装置
JP2010286661A (ja) * 2009-06-11 2010-12-24 Sumitomo Electric Ind Ltd ファイバアレイ及びそれを含む光コネクタ
WO2012121320A1 (fr) * 2011-03-09 2012-09-13 古河電気工業株式会社 Procédé de fabrication d'une structure de faisceau, procédé de connexion de fibres, structure terminale de faisceau et structure de connexion de fibres

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018199339A1 (fr) * 2017-04-28 2018-11-01 株式会社フジクラ Combineur et dispositif laser
JP2018189696A (ja) * 2017-04-28 2018-11-29 株式会社フジクラ コンバイナ、及び、レーザ装置
JP2019061277A (ja) * 2018-12-18 2019-04-18 株式会社フジクラ コンバイナ、及び、レーザ装置

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TW201421091A (zh) 2014-06-01
JP2014102305A (ja) 2014-06-05

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