JP2014006281A - Optical connector - Google Patents

Optical connector Download PDF

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Publication number
JP2014006281A
JP2014006281A JP2012139749A JP2012139749A JP2014006281A JP 2014006281 A JP2014006281 A JP 2014006281A JP 2012139749 A JP2012139749 A JP 2012139749A JP 2012139749 A JP2012139749 A JP 2012139749A JP 2014006281 A JP2014006281 A JP 2014006281A
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Prior art keywords
optical fiber
ferrule
light
optical connector
optical
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JP2012139749A
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Japanese (ja)
Inventor
Yasunori Yuki
泰紀 由木
Koji Hirao
浩司 平尾
Shinko Hamada
眞弘 濱田
Koretaka Shiraishi
維孝 白石
Yuki Masuda
有希 増田
Airi OBATA
愛里 小幡
Sonomi INOUE
園美 井上
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Sumiden Opcom Ltd
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Sumiden Opcom Ltd
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Priority to JP2012139749A priority Critical patent/JP2014006281A/en
Priority to PCT/JP2013/067030 priority patent/WO2013191268A1/en
Publication of JP2014006281A publication Critical patent/JP2014006281A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
    • G01M11/3109—Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
    • G01M11/3154—Details of the opto-mechanical connection, e.g. connector or repeater
    • 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
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
    • G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
    • G02B6/29368—Light guide comprising the filter, e.g. filter deposited on a fibre end
    • 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
    • G02B6/3806—Semi-permanent connections, i.e. wherein the mechanical means keeping the fibres aligned allow for removal of the 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
    • G02B6/36—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
    • G02B6/3845—Details of mounting fibres in ferrules; Assembly methods; Manufacture ferrules comprising functional elements, e.g. filters
    • 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
    • G02B6/3846—Details of mounting fibres in ferrules; Assembly methods; Manufacture with fibre stubs

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an optical connector that can be assembled with good workability by using a normal optical connector and a ferrule, can block and/or reflect light at a predetermined wavelength by use of a dielectric multilayer film filter, and can facilitate fiber identification or a test of an optical fiber line.SOLUTION: In the optical connector, a front end of a short optical fiber 12 is inserted and fixed to a ferrule 11; and an end face at an end of a connecting optical fiber 13 is abutted and spliced by a mechanical splicer 16 to an end face at a rear end protruding from the rear side of the ferrule. A dielectric multilayer film filter 15 that blocks and/or reflects light at a predetermined wavelength and transmits light at other wavelengths is directly formed by vapor deposition on an end face 12a at a rear end of the short optical fiber 12. The light at a predetermined wavelength is, for example, visible light or a test light at a wavelength of 1650 nm.

Description

本発明は、誘電体多層膜フィルタを備えた光コネクタに関する。   The present invention relates to an optical connector provided with a dielectric multilayer filter.

光配線網を形成する光配線盤等では、光ファイバの新規布設や接続変更で、光ファイバを特定するために心線対照が行われる。例えば、特許文献１には、光接続部材の接続を外すことなく、また、光通信状態を維持した状態で、光ファイバの心線対照を行うことができ、しかも、光ファイバ心線に物理的な曲げや歪みを与えることなく心線対照を行うための光コネクタが開示されている。   In an optical wiring board or the like that forms an optical wiring network, core line contrast is performed in order to identify an optical fiber by laying a new optical fiber or changing a connection. For example, in Patent Document 1, optical fiber cores can be compared without disconnecting the optical connection member and maintaining the optical communication state, and the optical fiber core wire is physically connected. An optical connector for performing a core contrast without giving a bend or distortion is disclosed.

図２（Ａ）に示す光コネクタ１は、上記の特許文献１に開示の光コネクタの一例で、フェルール２内に、光ファイバ心線の被覆を除去した裸ファイバ３の端部を挿入して接着一体化され、フェルール２は、フェルール押え５により保持され、コネクタ筐体６に装着される。フェルール２には、フェルール内の裸ファイバ３を分断するようにスリット２ａが入れられ、スリット２ａ内に可視光を反射する反射フィルタ（誘電体多層膜フィルタ）４が挿着されている。光ファイバ心線内に光コネクタ１側に向って可視光を送出すると、反射フィルタ４により光ファイバの外に反射されて、コネクタ筺体６の窓部７を通して光コネクタ外部に放光させることができ、心線対照を行うことができる。なお、可視光の他に信号光を同時に送出しても、反射フィルタ４を透過して通信を行うことが可能とされている。   An optical connector 1 shown in FIG. 2A is an example of the optical connector disclosed in the above-mentioned Patent Document 1, and the end of the bare fiber 3 from which the coating of the optical fiber core wire is removed is inserted into the ferrule 2. Adhering and integrating, the ferrule 2 is held by a ferrule presser 5 and attached to the connector housing 6. In the ferrule 2, a slit 2a is inserted so as to divide the bare fiber 3 in the ferrule, and a reflection filter (dielectric multilayer filter) 4 that reflects visible light is inserted in the slit 2a. When visible light is sent into the optical fiber core toward the optical connector 1 side, it is reflected outside the optical fiber by the reflection filter 4 and can be emitted to the outside of the optical connector through the window 7 of the connector housing 6. Can perform a core contrast. It should be noted that even if signal light is simultaneously transmitted in addition to visible light, it is possible to communicate through the reflection filter 4.

図２（Ｂ）は、上記のコネクタ１において、フェルール２内に反射フィルタ４を挿着する例である。反射フィルタ４を挿着するスリット２ａは、フェルール２のファイバ孔に、裸ファイバ３を挿入して接着一体化した後、フェルールの軸に交叉するように、所定の角度θで切り込みを入れ、裸ファイバ３を分断するようにして形成される。なお、スリット２ａの傾斜角θは、光ファイバ内を直進してきた可視光が光ファイバ内に戻らないようにする程度の角度とされている。   FIG. 2B is an example in which the reflection filter 4 is inserted into the ferrule 2 in the connector 1 described above. The slit 2a into which the reflection filter 4 is inserted is formed by inserting a bare fiber 3 into the fiber hole of the ferrule 2 and bonding and integrating it, and then making a cut at a predetermined angle θ so as to cross the ferrule axis. The fiber 3 is formed so as to be divided. The inclination angle θ of the slit 2a is set to an angle that prevents visible light that has traveled straight through the optical fiber from returning into the optical fiber.

また、特許文献２には、フェルール内で光ファイバを突き合わせ接続させ、その突き合わせ面間に誘電体多層膜フィルタ膜を設け、波長選択性をもたせたフィルタ付き光コネクタが開示されている。
図２（Ｃ）は、上記特許文献２に開示の光コネクタを模式的に示した図で、フェルール２内に、２本の短尺光ファイバ３ａと３ｂを突き合わせ接続するようにして挿着し、その突き合わせ接続する一方または両方の端面に、予め誘電体多層膜からなるフィルタ膜４ａが蒸着により形成されている。 Patent Document 2 discloses an optical connector with a filter in which an optical fiber is butt-connected in a ferrule, a dielectric multilayer filter film is provided between the butt surfaces, and wavelength selectivity is provided.
FIG. 2 (C) is a diagram schematically showing the optical connector disclosed in the above-mentioned Patent Document 2, and the two short optical fibers 3a and 3b are inserted into the ferrule 2 so as to be butt-connected, A filter film 4a made of a dielectric multilayer film is formed in advance by vapor deposition on one or both end faces to be butt-connected.

フェルール２の後方側に配される短尺光ファイバ３ｂの他端面には、光ファイバコード等の被覆が除去された裸ファイバ３が突き合わせ接続され、光コネクタの後部に配されるコード固定部（ブーツとも言う）により保持固定される。また、短尺光ファイバ３ａと３ｂとの突き合わせ端面は、図２（Ｂ）の場合と同様に傾斜面とすることも開示されている。なお、フィルタ膜４ａを蒸着により形成しているので、図２（Ｂ）のようにスリットを加工する必要がなく、低コスト化が図れるとされている。   The other end face of the short optical fiber 3b disposed on the rear side of the ferrule 2 is connected to the bare fiber 3 from which the coating of the optical fiber cord or the like is removed, and a cord fixing portion (boots) disposed on the rear portion of the optical connector. (Also called). It is also disclosed that the abutting end surface of the short optical fibers 3a and 3b is an inclined surface as in the case of FIG. In addition, since the filter film 4a is formed by vapor deposition, it is not necessary to process a slit as shown in FIG.

また、光コネクタは、フェルール内の裸光ファイバを光ファイバコードに接続するのに、例えば、特許文献３に開示されるように、現地での接続作業が容易なメカニカルスプライスを用いることがある。このメカニカルスプライスは、互いに接続する光ファイバを裸にして、ベース部材上のＶ溝で位置決めして突き合わせ、Ｖ溝の上方からカバー部材をバネ部材で押さえる構造が一般的である。   In addition, an optical connector may use a mechanical splice that is easy to connect on site, for example, as disclosed in Patent Document 3, to connect a bare optical fiber in a ferrule to an optical fiber cord. This mechanical splice generally has a structure in which optical fibers connected to each other are bare, positioned and butted by a V groove on a base member, and a cover member is pressed by a spring member from above the V groove.

特開２００８−８３６２２号公報JP 2008-83622 A 特開平１１−２３１１３９号公報JP-A-11-231139 特開平１１−１６０５６３号公報JP-A-11-160563

図２（Ａ）（Ｂ）の構成においては、フェルール（通常、ジルコニア等のセラミックで形成）にスリットを形成するために切削加工しなければならず、また、フィルタ部材を微小なスリットに１枚ずつ手作業で挿入し接着固定するため、作業時間がかかるという問題がある。一方、図２（Ｃ）の構成を用いることにより、上記の作業については改善することができるが、他方、フェルール内に２つの短尺光ファイバを挿着することと、２箇所の突き合わせ接続を必要とし、光接続損失を増大させ、また、接続の調心も２回行う必要がある。
また、図２（Ｂ）、（Ｃ）のいずれの形態においても、フェルール内にフィルタ部材を配する構成であるため、通常の光コネクタとは、寸法、形状等が異なる部材とフェルールを使用する必要があり、コスト増となる。 2A and 2B, the ferrule (usually formed of ceramic such as zirconia) must be cut to form a slit, and one filter member is formed in a minute slit. There is a problem that it takes a long time to manually insert and fix them one by one. On the other hand, by using the configuration of FIG. 2C, the above work can be improved, but on the other hand, it is necessary to insert two short optical fibers into the ferrule and two butt connections. Therefore, it is necessary to increase the optical connection loss and to perform connection alignment twice.
2B and 2C, since the filter member is arranged in the ferrule, the ferrule is used with a member having a different size, shape, etc. from a normal optical connector. This is necessary and increases costs.

本発明は、上述した実状に鑑みてなされたもので、通常の光コネクタとフェルールを用いて作業性よく組み立てることができ、誘電体多層膜フィルタによる所定波長の光を遮断・反射させ、光ファイバ線路の心線対照や試験を容易に行うことが可能な光コネクタの提供を目的とする。   The present invention has been made in view of the above-described circumstances, and can be assembled with good workability using a normal optical connector and a ferrule, and can block and reflect light of a predetermined wavelength by a dielectric multilayer film filter, thereby providing an optical fiber. An object of the present invention is to provide an optical connector that can easily perform the control of the cores of the track and the test.

本発明による光コネクタは、フェルールに短尺光ファイバの前端部が挿着固定され、フェルールの後方から突き出る後端部の端面に、接続用光ファイバの端部の端面がメカニカルスプライサにより突き合わせ接続される光コネクタであって、短尺光ファイバの後端部の端面に、所定波長の光を遮断・反射させ、他の波長の光を透過させる誘電体多層膜フィルタが蒸着により直接形成されていることを特徴とする。   In the optical connector according to the present invention, the front end portion of the short optical fiber is inserted and fixed to the ferrule, and the end surface of the end portion of the connecting optical fiber is abutted and connected by the mechanical splicer to the end surface of the rear end portion protruding from the rear of the ferrule. A dielectric multilayer filter that blocks and reflects light of a predetermined wavelength and transmits light of other wavelengths is directly formed by vapor deposition on the end face of the rear end of the short optical fiber. It is characterized by.

上記の所定波長に可視光を用い、メカニカルスプライサの光ファイバ突き合わせ接続部の周辺の部材が、可視光を外部に漏光させる部材で形成して、心線対照を行うようにしてもよい。この場合、短尺光ファイバの後端部の端面が、斜め研磨されていることが好ましい。また、上記の所定波長の光に、波長１６２５ｎｍもしくは１６５０ｎｍの試験光を用い、光ファイバ線路の試験を行うようにしてもよい。   Visible light may be used for the predetermined wavelength, and a member around the optical fiber butt connection portion of the mechanical splicer may be formed of a member that leaks visible light to the outside to perform the contrast control. In this case, it is preferable that the end surface of the rear end portion of the short optical fiber is obliquely polished. Further, a test of an optical fiber line may be performed using test light having a wavelength of 1625 nm or 1650 nm as the light having the predetermined wavelength.

本発明によれば、フェルール内に誘電体多層膜フィルタを有しないので、通常の寸法・形状のフェルールを用いることができる。また、誘電体多層膜フィルタは、フェルールから突き出る後端部の端面に形成され、この端面に光ファイバコード等の光ファイバを突き合わせ接続すればよいので、メカニカルスプライスによる接続が可能で、しかも、通常の光コネクタを用いて、作業性よく組み立てることができる。   According to the present invention, since there is no dielectric multilayer filter in the ferrule, a ferrule having a normal size and shape can be used. In addition, the dielectric multilayer filter is formed on the end face of the rear end protruding from the ferrule, and an optical fiber such as an optical fiber cord may be butt-connected to the end face. Can be assembled with good workability.

本発明による光コネクタの概略を説明する図である。It is a figure explaining the outline of the optical connector by this invention. 従来技術を説明する図である。It is a figure explaining a prior art.

図１により本発明の実施の形態を説明する。図において、１０は光コネクタ、１１はフェルール、１２は短尺光ファイバ、１２ａは端面、１３はコード光ファイバ、１４は光ファイバコード、１５は誘電体多層膜フィルタ、１６はメカニカルスプライス、１７はベース部材、１７ａはフェルール保持部、１７ｂはＶ溝、１８はカバー部材、１９ａ，１９ｂはクランプ部材、２０はコイルスプリング、２１は前部筐体、２２は後部筐体、２３はブーツ、２４は凹部、２５は楔部材を示す。   An embodiment of the present invention will be described with reference to FIG. In the figure, 10 is an optical connector, 11 is a ferrule, 12 is a short optical fiber, 12a is an end face, 13 is a cord optical fiber, 14 is an optical fiber cord, 15 is a dielectric multilayer filter, 16 is a mechanical splice, and 17 is a base. Member, 17a is a ferrule holding portion, 17b is a V groove, 18 is a cover member, 19a and 19b are clamp members, 20 is a coil spring, 21 is a front case, 22 is a rear case, 23 is a boot, and 24 is a recess. , 25 indicate wedge members.

光コネクタ１０は、例えば、特許文献３に開示のように、短尺光ファイバ１２を挿着固定したフェルール１１を用い、メカニカルスプライス１６で光ファイバコード１４を接続する形態のもので構成される。短尺光ファイバ１２の一方の端部である前端部は、フェルール１１内の前端に位置するように挿着固定され、短尺光ファイバ１２の他方の端部である後端部は、フェルール１１の後方から突き出て、接続用の光ファイバコード１４の光ファイバ（以下、コード光ファイバという）１３と突き合せ接続される。   For example, as disclosed in Patent Document 3, the optical connector 10 includes a ferrule 11 in which a short optical fiber 12 is inserted and fixed, and an optical fiber cord 14 is connected by a mechanical splice 16. The front end portion, which is one end portion of the short optical fiber 12, is inserted and fixed so as to be positioned at the front end in the ferrule 11, and the rear end portion, which is the other end portion of the short optical fiber 12, is located behind the ferrule 11. The optical fiber cord 14 for connection (hereinafter referred to as a cord optical fiber) 13 is butt-connected.

フェルール１１は、短尺光ファイバ１２とコード光ファイバ１３とを突き合わせ接続するメカニカルスプライス１６のベース部材１７に一体に形成されているフェルール保持部１７ａにより保持される。メカニカルスプライス１６は、ベース部材１７、カバー部材１８およびクランプ部材１９ａ，１９ｂからなり、ベース部材１７には、ａ−ａ断面で示すようにＶ溝１７ｂが形成されている。このＶ溝１７ｂには、互いに突き合わせ接続される短尺光ファイバ１２の後端部とコード光ファイバ１３の端部の端面が突き合わすようにして入れられ、カバー部材１８で押えられる。   The ferrule 11 is held by a ferrule holding portion 17 a formed integrally with a base member 17 of a mechanical splice 16 that butt-connects the short optical fiber 12 and the cord optical fiber 13. The mechanical splice 16 includes a base member 17, a cover member 18, and clamp members 19a and 19b. A V-groove 17b is formed in the base member 17 as shown in the section aa. In this V groove 17 b, the rear end portion of the short optical fiber 12 and the end surface of the end portion of the cord optical fiber 13 that are butt-connected to each other are put into contact with each other and are pressed by the cover member 18.

ベース部材１７とカバー部材１８は、例えば、バネ性のある金属材で形成された断面Ｕ字状のクランプ部材１９ａ，１９ｂにより、接合面が閉じられている。光ファイバを突き合わせ接続するときは、ベース部材１７とカバー部材１８の間に形成された凹部２４に楔部材２５を差し込んで接合面を押し開き、Ｖ溝１７ｂに短尺光ファイバ１２とコード光ファイバ１３の端部を挿入し、その端面同士を突き合わせ調心する。この後、楔部材２５を凹部２４から抜き去ることにより、クランプ部材１９ａ，１９ｂによりベース部材１７とカバー部材１８の接合面が閉じられ、短尺光ファイバ１２とコード光ファイバ１３の突き合わせ接続状態が固定される。   The joint surfaces of the base member 17 and the cover member 18 are closed by clamp members 19a and 19b having a U-shaped cross section formed of, for example, a spring metal material. When the optical fibers are butt-connected, the wedge member 25 is inserted into the recess 24 formed between the base member 17 and the cover member 18 to push the joint surface open, and the short optical fiber 12 and the cord optical fiber 13 are inserted into the V groove 17b. Are inserted, and the end faces are butted and aligned. Thereafter, by removing the wedge member 25 from the recess 24, the joint surfaces of the base member 17 and the cover member 18 are closed by the clamp members 19a and 19b, and the butt connection state of the short optical fiber 12 and the cord optical fiber 13 is fixed. Is done.

短尺光ファイバ１２とコード光ファイバ１３とが上記の如く突き合わせ接続され、フェルール１１がメカニカルスプライス１６のベース部材１７に一体に形成されているフェルール保持部１７ａにより保持された状態で、前部筺体２１と後部筺体２２に収容され、光コネクタ１０としての組み立てが完了する。
なお、フェルール１１とメカニカルスプライス１６とは、コイルスプリング２０により筺体の前部側に付勢されていて、フェルール１１は筺体内に移動可能とされている。また、光コネクタ１０の後部には、弾性を有するブーツ２３が被せられ、光ファイバコード１４の引き出し端部を保護固定している。 In the state where the short optical fiber 12 and the cord optical fiber 13 are butt-connected as described above, and the ferrule 11 is held by the ferrule holding portion 17a formed integrally with the base member 17 of the mechanical splice 16, the front housing 21 And the rear housing 22, and the assembly as the optical connector 10 is completed.
The ferrule 11 and the mechanical splice 16 are urged toward the front side of the housing by the coil spring 20 so that the ferrule 11 can move into the housing. Further, an elastic boot 23 is placed on the rear portion of the optical connector 10 to protect and fix the lead-out end portion of the optical fiber cord 14.

本発明は、上記のように構成される光コネクタ１０で、図の部分拡大図で示すように、コード光ファイバ１３と突き合わせ接続する短尺光ファイバ１２の後端部の端面１２ａに、誘電体多層膜フィルタ１５が蒸着により形成されていることを特徴とする。誘電体多層膜フィルタ１５は、所定波長の光は遮断もしくは反射させ、他の波長の光は透過させるフィルタである。この誘電体多層膜フィルタ１５は、予め短尺光ファイバ１２の一方の端部の端面１２ａに蒸着で直接形成しておき、この後、フェルール１１に挿着固定するのが好ましい。   The present invention is an optical connector 10 configured as described above. As shown in the partially enlarged view of the figure, a dielectric multilayer is formed on an end face 12a of a rear end portion of a short optical fiber 12 that is butt-connected to a cord optical fiber 13. The membrane filter 15 is formed by vapor deposition. The dielectric multilayer filter 15 is a filter that blocks or reflects light of a predetermined wavelength and transmits light of other wavelengths. The dielectric multilayer filter 15 is preferably formed in advance on the end surface 12a of one end of the short optical fiber 12 by vapor deposition, and then inserted and fixed to the ferrule 11.

光通信の信号光には、一般に１３１０ｎｍおよび１５５０ｎｍの波長帯の光が用いられる。誘電体多層膜フィルタ１５として、例えば、前記の波長帯の光は透過させるが、可視光（波長４００ｎｍ〜７５０ｎｍ）を、遮断もしくは反射させるようにしたフィルタを用いる。そして、誘電体多層膜フィルタ１５が配された短尺光ファイバ１２とコード光ファイバ１３との突き合わせ接続部の周辺の部材を、可視光が透過可能な材料で形成し、また、可視光を外部に放光する窓部を有する部材で形成する。この場合、誘電体多層膜フィルタ１５で反射した可視光が送出側に戻らないようにすると共に、外部への放光量が多くなるように、短尺光ファイバ１２の端面１２ａを斜め研磨して傾斜角を有する形態とすることが好ましい。   In general, light having a wavelength band of 1310 nm and 1550 nm is used as signal light for optical communication. As the dielectric multilayer filter 15, for example, a filter that transmits light in the above-described wavelength band but blocks or reflects visible light (wavelength 400 nm to 750 nm) is used. Then, the members around the butt connection portion between the short optical fiber 12 and the cord optical fiber 13 in which the dielectric multilayer filter 15 is arranged are formed of a material that can transmit visible light, and the visible light is transmitted to the outside. It forms with the member which has the window part which emits light. In this case, the end face 12a of the short optical fiber 12 is obliquely polished to prevent the visible light reflected by the dielectric multilayer filter 15 from returning to the transmission side and to increase the amount of emitted light to the outside. It is preferable to have a form having

上記のように構成された光コネクタは、光コネクタを光配線盤や光機器に接続したまま、さらには、上記の波長１３１０ｎｍおよび１５５０ｎｍによる光通信状態を維持したままで、光コネクタに向けて可視光を送出することにより、心線対照を行うことができる。心線対照は、メカニカルスプライサ１６により突き合わせ接続されている部分の誘電体多層膜フィルタ１５により、遮断・反射された可視光が外部に漏れ出て、この漏れ光を視認することで、従来と同様に心線対照を行うことができる。   The optical connector configured as described above is visible toward the optical connector while the optical connector is connected to an optical wiring board or an optical device, and further, while maintaining the optical communication state with the wavelengths of 1310 nm and 1550 nm. By sending out the light, it is possible to perform a cord contrast. The cord control is performed by visually observing the leaked light that has been cut off and reflected by the dielectric multilayer filter 15 at the portion that is butt-connected by the mechanical splicer 16. Similarly, cord contrast can be performed.

また、光配線網の保守管理で、インサービス試験が実施されている。このインサービス試験とは、光通信している状態で通信に影響を与えないように光ファイバ線路に試験光を送出し、ＯＤＴＲ（光パルス試験）等により遠隔で光ファイバ線路の光損失測定や故障個所の検出する試験である。このインサービス試験における試験光としては、通常、波長１３１０ｎｍおよび１５５０ｎｍの波長帯と離れた１６２５ｎｍもしくは１６５０ｎｍの波長が用いられている。しかし、この試験光は、加入者端末装置（ＯＮＵ）では受信されないように、遮断・反射させる必要がある。   Also, in-service tests are being conducted in the maintenance management of the optical wiring network. This in-service test refers to sending test light to an optical fiber line so as not to affect communication in the state of optical communication, and measuring optical loss of the optical fiber line remotely by ODTR (optical pulse test) or the like. This is a test to detect the fault location. As test light in this in-service test, a wavelength of 1625 nm or 1650 nm that is separated from the wavelength bands of 1310 nm and 1550 nm is usually used. However, it is necessary to block and reflect the test light so that it is not received by the subscriber terminal unit (ONU).

そこで、上述した光コネクタの誘電体多層膜フィルタ１５に、１６２５ｎｍもしくは１６５０ｎｍの波長の試験光は、遮断もしくは反射させ、波長１３１０ｎｍおよび１５５０ｎｍの波長帯の信号光は透過させるフィルタを用いることにより、インサービス試験を容易に行うことができる。なお、誘電体多層膜フィルタ１５により反射されて戻ってくる試験光を、送出側でＯＤＴＲ等で検出することで、光損失測定や故障個所を検出することができる。   Therefore, the dielectric multilayer filter 15 of the optical connector described above uses a filter that blocks or reflects test light having a wavelength of 1625 nm or 1650 nm and transmits signal light having wavelengths of 1310 nm and 1550 nm. Service tests can be easily performed. Note that the test light reflected and returned by the dielectric multilayer filter 15 is detected by ODTR or the like on the transmission side, thereby making it possible to measure the optical loss and detect the failure location.

上述のように構成された誘電体多層膜フィルタを備えた光コネクタは、フェルールにスリットを形成する切削加工、スリットに誘電体多層膜フィルタをそれぞれ挿着する作業が必要が不要となり、製造コストを低減することができる。なお、短尺光ファイバの端面に誘電体多層膜フィルタを蒸着形成することは、多数本を一括して行うことが可能であり、コスト的は安価である。   An optical connector having a dielectric multilayer filter configured as described above eliminates the need for a cutting process for forming a slit in the ferrule and a work for inserting the dielectric multilayer filter in the slit, thereby reducing the manufacturing cost. Can be reduced. It should be noted that the deposition of the dielectric multilayer filter on the end face of the short optical fiber can be performed in a lump, and the cost is low.

また、短尺光ファイバ自体は、従来の短尺光ファイバと同じものを使い、また、一方の端部の端面に誘電体多層膜フィルタを形成した後、他方の端部をフェルールに挿入して接着固定するので、従来品と同じ寸法・形状のものを用いることができ、組み付けも同じように行うことができる。
また、メカニカルスプライスのベース部材およびカバー部材等の寸法・形状も従来品と同じものを用いることができる。また、ベース部材およびカバー部材は、通常、樹脂製であるので、これらの部材を透光性の樹脂で形成する場合も、同じ金型を用いることができコスト増とはならず、部材費を削減することができる。 Also, the short optical fiber itself is the same as the conventional short optical fiber, and after forming a dielectric multilayer filter on the end face of one end, the other end is inserted into a ferrule and bonded and fixed. Therefore, the same size and shape as the conventional product can be used, and the assembly can be performed in the same manner.
Further, the same dimensions and shapes of the base member and cover member of the mechanical splice can be used as in the conventional product. Further, since the base member and the cover member are usually made of resin, even when these members are formed of a light-transmitting resin, the same mold can be used without increasing the cost, and the member cost is increased. Can be reduced.

１０…光コネクタ、１１…フェルール、１２…短尺光ファイバ、１２ａ…端面、１３…コード光ファイバ、１４…光ファイバコード、１５…誘電体多層膜フィルタ、１６…メカニカルスプライス、１７…ベース部材、１７ａ…フェルール保持部、１７ｂ…Ｖ溝、１８…カバー部材、１９ａ，１９ｂ…クランプ部材、２０…コイルスプリング、２１…前部筐体、２２…後部筐体、２３…ブーツ、２４…凹部、２５…楔部材。 DESCRIPTION OF SYMBOLS 10 ... Optical connector, 11 ... Ferrule, 12 ... Short optical fiber, 12a ... End face, 13 ... Cord optical fiber, 14 ... Optical fiber cord, 15 ... Dielectric multilayer filter, 16 ... Mechanical splice, 17 ... Base member, 17a ... Ferrule holding part, 17b ... V groove, 18 ... Cover member, 19a, 19b ... Clamp member, 20 ... Coil spring, 21 ... Front housing, 22 ... Rear housing, 23 ... Boot, 24 ... Recess, 25 ... Wedge member.

Claims (4)

フェルールに短尺光ファイバの前端部が挿着固定され、前記フェルールの後方から突き出る後端部の端面に、接続用光ファイバの端部の端面がメカニカルスプライサにより突き合わせ接続される光コネクタであって、
前記短尺光ファイバの後端部の端面に、所定波長の光を遮断もしくは反射させ、他の波長の光を透過させる誘電体多層膜フィルタが蒸着により直接形成されていることを特徴とする光コネクタ。 An optical connector in which a front end portion of a short optical fiber is inserted and fixed to a ferrule, and an end surface of a connecting optical fiber is abutted and connected to an end surface of a rear end portion protruding from the rear of the ferrule by a mechanical splicer. ,
An optical connector characterized in that a dielectric multilayer filter that blocks or reflects light of a predetermined wavelength and transmits light of another wavelength is directly formed on the end face of the rear end portion of the short optical fiber by vapor deposition. . 前記所定波長は可視光であり、前記メカニカルスプライサの光ファイバ突き合わせ接続部の周辺の部材が、前記可視光を外部に漏光させる部材で形成されていることを特徴とする請求項１に記載の光コネクタ。   The said predetermined wavelength is visible light, The member of the periphery of the optical fiber butt | matching connection part of the said mechanical splicer is formed with the member which leaks the said visible light outside, The Claim 1 characterized by the above-mentioned. Optical connector. 前記短尺光ファイバの後端部の端面が、斜め研磨されていることを特徴とする請求項１または２に記載の光コネクタ。   The optical connector according to claim 1, wherein an end surface of a rear end portion of the short optical fiber is obliquely polished. 前記所定波長の光が、波長１６２５ｎｍもしくは１６５０ｎｍの試験光であることを特徴とする請求項１に記載の光コネクタ。   The optical connector according to claim 1, wherein the light having the predetermined wavelength is test light having a wavelength of 1625 nm or 1650 nm.
JP2012139749A 2012-06-21 2012-06-21 Optical connector Pending JP2014006281A (en)

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