WO2000026707A1 - Optical fiber array using resin lid substrate - Google Patents

Optical fiber array using resin lid substrate Download PDF

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Publication number
WO2000026707A1
WO2000026707A1 PCT/JP1999/006024 JP9906024W WO0026707A1 WO 2000026707 A1 WO2000026707 A1 WO 2000026707A1 JP 9906024 W JP9906024 W JP 9906024W WO 0026707 A1 WO0026707 A1 WO 0026707A1
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WO
WIPO (PCT)
Prior art keywords
optical fiber
substrate
groove
fiber array
lid substrate
Prior art date
Application number
PCT/JP1999/006024
Other languages
French (fr)
Japanese (ja)
Inventor
Takenori Ichigi
Jungo Kondo
Yoshizumi Nakasuji
Eiji Kitakami
Original Assignee
Ngk Insulators, Ltd.
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Application filed by Ngk Insulators, Ltd. filed Critical Ngk Insulators, Ltd.
Publication of WO2000026707A1 publication Critical patent/WO2000026707A1/en

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/3628Mechanical coupling means for mounting fibres to supporting carriers
    • G02B6/3632Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means
    • G02B6/3636Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means the mechanical coupling means being grooves
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3834Means for centering or aligning the light guide within the ferrule
    • G02B6/3838Means for centering or aligning the light guide within the ferrule using grooves for light guides
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3834Means for centering or aligning the light guide within the ferrule
    • G02B6/3838Means for centering or aligning the light guide within the ferrule using grooves for light guides
    • G02B6/3839Means for centering or aligning the light guide within the ferrule using grooves for light guides for a plurality of light guides
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3855Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
    • G02B6/3861Adhesive bonding

Definitions

  • the present invention relates to an optical frame formed by fixing a core portion of an optical fiber tip to a substrate.
  • an optical fiber array includes a V-groove substrate on which a V-groove is formed, and a lid substrate integrated with the V-groove substrate, and covers the tip of the optical fiber on the V-groove of the V-groove substrate. It has a structure in which the removed core wire part is placed and the core wire part is pressed into the V-groove from the upper surface of the V-groove substrate by the lid substrate and fixed.
  • a V-groove substrate and a lid substrate are formed of the same material and made of a hard material such as glass or silicon. This is because a material that is hard and hard to deform is required to align multiple fibers and perform precise positioning.
  • the core portion of the optical fiber is V-shaped by the lid substrate.
  • the edge of the lid substrate, the start of the zigzag (step) formed on the substrate to support the coating of the optical fiber, or the protrusion caused by the finished state of the substrate surface was injured.
  • the present invention has been made in view of such conventional circumstances, and an object thereof is to prevent an optical fiber from being damaged by a substrate at the time of assembling an optical fiber array, and to be caused by the damage.
  • An object of the present invention is to provide an optical fiber that does not cause a fiber disconnection. Disclosure of the invention
  • a V-groove substrate on which a V-groove is formed and a cover substrate integrated with the V-groove substrate, and the coating of the tip of the optical fiber is removed on the V-groove of the V-groove substrate
  • the optical fiber array having a structure in which the core part is placed and the core part is pressed into the V-groove from the upper surface of the V-groove substrate with the lid substrate, only the lid substrate is made of resin.
  • An optical fiber array is provided.
  • FIGS. 1 (a), 1 (b) and 1 (c) are explanatory views showing an example of an optical fiber array according to the present invention.
  • FIG. 1 (a) is a plan view
  • FIG. 1 (c) is a II-II sectional view of FIG. 1 (a).
  • FIG. 2 is an enlarged sectional view showing a fixed state of the core wire portion.
  • the optical fiber array of the present invention is characterized in that the lid substrate is made of resin.
  • the cover substrate which has the role of pressing the core of the optical fiber tip against the V-groove of the V-groove substrate and fixing it, to a resin that is softer than conventional glass-silicon ones, When pressed against the groove, the cover substrate is less likely to damage the core portion, and the occurrence of disconnection of the optical fiber due to such damage during assembly is reduced.
  • FIG. 1 (a), 1 (b) and 1 (c) are explanatory views showing an example of an embodiment of an optical fiber array according to the present invention.
  • FIG. 1 (a) is a plan view
  • FIG. 1 (b) is FIG. 1 (a).
  • Fig. 1c) is a cross-sectional view taken along line II-II of Fig. 1 (a).
  • an example of an optical fiber array in which only one optical fiber is fixed to a substrate is shown, but the optical fiber array of the present invention has a plurality of V-grooves. It is also possible to align and fix a plurality of optical fibers by using a V-groove substrate on which is formed.
  • the optical fiber array of the present invention includes a V-groove substrate 5 on which a V-groove 6 is formed and a lid substrate 4 as in the related art.
  • counterbores (step portions) 7 and 8 for supporting the coating portion 3 of the optical fiber 1 are formed on these substrates.
  • Optical fiber using these substrates In assembling the eyelay, the core portion 2 from which the coating at the tip of the optical fiber 1 has been removed is placed on the V-groove 6 of the V-groove substrate 5, and the core portion 2 is applied from the upper surface of the V-groove substrate 5 by the lid substrate 4. Press it into groove 6 and fix it.
  • FIG. 2 is an enlarged cross-sectional view showing a fixed state of the core wire portion 2. In this fixed state, an adhesive (not shown) is injected into the gap between the lid substrate 4, the V-groove substrate 5, and the core wire portion 2, and is cured to be integrated.
  • the lid substrate 4 is made of a soft resin as described above, the optical fiber is less likely to be damaged when the core wire portion 2 is pressed by the lid substrate 4.
  • the type of resin used for the lid substrate 4 is not particularly limited, but is required to have sufficient hardness not to damage the optical fiber and to hold the optical fiber in the V-groove 6.
  • a material of about Rockwell M70, specifically, an engineering plastic material such as polycarbonate is preferable.
  • the lid substrate 4 is made of a resin
  • the V-groove substrate 5 is made of a hard material such as glass or silicon as in the related art.
  • the core substrate 2 of the optical fiber 1 is pressed against a V-groove substrate 5 made of a hard material such as glass or silicon by using a lid substrate 4 made of a resin having an appropriate hardness such as polycarbonate. Fiber positioning accuracy equivalent to that of an ordinary optical fiber array made of a hard material such as glass or silicon can be maintained.
  • the joint may be peeled off by thermal cycling due to the difference in thermal expansion between the two.
  • the optical fiber is less likely to be damaged by the substrate at the time of assembly, and the optical fiber hardly breaks due to such damage.

Abstract

An optical fiber array having a structure where a V-groove substrate (5) in which a V-groove (6) is formed and a lid substrate (4) integral with the V-groove substrate (5) are provided, and a core section (2) of the end (1) of the optical fiber from which its cover is removed is placed on the V-groove (6) and pressed from above the V-groove substrate (5) against the V-groove (6) by means of the lid substrate (4) to secure the core section (2). Only the lid substrate (4) is made of resin. During the assembly of the optical fiber array, the optical fiber is not damaged by the substrates and hardly breaks because of damage.

Description

明 細 書 樹脂製蓋基板を用いた光 技術分野  Description Optical technology using resin lid substrate
本発明は、 光ファイバ先端の芯線部を基板に固定して形成される光フ レイに関するものである。 背景技術  The present invention relates to an optical frame formed by fixing a core portion of an optical fiber tip to a substrate. Background art
一般に、 光ファイバアレイは、 V溝が形成された V溝基板と、 その V溝基板に 対して一体化される蓋基板とを備え、 V溝基板の V溝上に、 光ファイバ先端の被 覆を除去した芯線部を載置し、 蓋基板にて V溝基板の上面より芯線部を V溝に押 しっけて固定する構造を有する。 このような構造の光ファイバアレイにおいて、 従来、 V溝基板と蓋基板とは同材質で形成され、 ガラス、 シリコン等の硬い材質 からなるものが使用されてきた。 これは複数のファイバを整列させて精密に位置 決めを行うためには、 硬く変形しにくい材質が必要であるためである。  Generally, an optical fiber array includes a V-groove substrate on which a V-groove is formed, and a lid substrate integrated with the V-groove substrate, and covers the tip of the optical fiber on the V-groove of the V-groove substrate. It has a structure in which the removed core wire part is placed and the core wire part is pressed into the V-groove from the upper surface of the V-groove substrate by the lid substrate and fixed. Conventionally, in an optical fiber array having such a structure, a V-groove substrate and a lid substrate are formed of the same material and made of a hard material such as glass or silicon. This is because a material that is hard and hard to deform is required to align multiple fibers and perform precise positioning.
しかしながら、 上記のように V溝基板と蓋基板とをガラス、 シリコン等の硬い 材質で形成した従来の光ファイバアレイでは、 その組立時において、 光ファイバ の芯線部を蓋基板により V溝基板の V溝に押しつける際に、 蓋基板のエツジゃ、 光ファイバの被覆部を支持するために基板に形成されたザダリ (段差部) の開始 部分、 あるいは基板表面の仕上げ状態に起因する突起により、 光ファイバを傷つ けてしまうことがあった。  However, in the conventional optical fiber array in which the V-groove substrate and the lid substrate are formed of a hard material such as glass or silicon as described above, at the time of assembling, the core portion of the optical fiber is V-shaped by the lid substrate. When pressed into the groove, the edge of the lid substrate, the start of the zigzag (step) formed on the substrate to support the coating of the optical fiber, or the protrusion caused by the finished state of the substrate surface Was injured.
そして、 このようにフアイバが傷つけられた状態で光フアイバアレイが組み立 てられた場合には、 ファイバの引っ張りや熱サイクルによって、 傷から容易にク ラックが伸展し、 フアイバが断線してしまうという問題があつた。  When an optical fiber array is assembled with the fiber damaged in this way, the fiber is easily stretched from the damage due to fiber pulling or thermal cycling, and the fiber is broken. There was.
本発明は、 このような従来の事情に鑑みてなされたものであり、 その目的とす るところは、 光ファイバアレイの組立時において基板により光ファイバを傷つけ ることがなく、 当該傷に起因するファィバの断線のおそれのない光ファィバァレ ィを提供することにある。 発明の開示 The present invention has been made in view of such conventional circumstances, and an object thereof is to prevent an optical fiber from being damaged by a substrate at the time of assembling an optical fiber array, and to be caused by the damage. An object of the present invention is to provide an optical fiber that does not cause a fiber disconnection. Disclosure of the invention
本発明によれば、 V溝が形成された V溝基板と、 当該 V溝基板に対して一体化 される蓋基板とを備え、 前記 V溝基板の V溝上に、 光ファイバ先端の被覆を除去 した芯線部を載置し、 前記蓋基板にて V溝基板の上面より前記芯線部を V溝に押 しっけて固定する構造を有する光ファイバァレイにおいて、 前記蓋基板のみを樹 脂製としたことを特徴とする光ファイバアレイ、 が提供される。 図面の簡単な説明  According to the present invention, there is provided a V-groove substrate on which a V-groove is formed, and a cover substrate integrated with the V-groove substrate, and the coating of the tip of the optical fiber is removed on the V-groove of the V-groove substrate In the optical fiber array having a structure in which the core part is placed and the core part is pressed into the V-groove from the upper surface of the V-groove substrate with the lid substrate, only the lid substrate is made of resin. An optical fiber array is provided. BRIEF DESCRIPTION OF THE FIGURES
図 1 (a) (b) ( c) は、 本発明に係る光ファイバアレイの一例を示す説明 図で、 図 1 (a)が平面図、 図 1 (b)が図 1 (a)の I— I断面図、 図 1 (c)が図 1 (a)の II一 II断面図である。 図 2は、 芯線部の固定状態を示す拡大断面図である。 発明を実施するための最良の形態  FIGS. 1 (a), 1 (b) and 1 (c) are explanatory views showing an example of an optical fiber array according to the present invention. FIG. 1 (a) is a plan view, and FIG. — I sectional view, and FIG. 1 (c) is a II-II sectional view of FIG. 1 (a). FIG. 2 is an enlarged sectional view showing a fixed state of the core wire portion. BEST MODE FOR CARRYING OUT THE INVENTION
本発明の光ファイバアレイは、 蓋基板を樹脂製としたことをその特徴とするも のである。 光ファイバ先端の芯線部を V溝基板の V溝に押しつけて固定する役割 を有する蓋基板を、 従来のガラス製ゃシリコン製のものより柔らかい樹脂製のも のとすることにより、 芯線部を V溝に押しつける際に、 蓋基板が芯線部を傷つけ ることが少なくなり、 このような組立時の傷に起因する光ファイバの断線の発生 が減少する。  The optical fiber array of the present invention is characterized in that the lid substrate is made of resin. By making the cover substrate, which has the role of pressing the core of the optical fiber tip against the V-groove of the V-groove substrate and fixing it, to a resin that is softer than conventional glass-silicon ones, When pressed against the groove, the cover substrate is less likely to damage the core portion, and the occurrence of disconnection of the optical fiber due to such damage during assembly is reduced.
図 1 (a) (b) ( c) は本発明に係る光ファイバアレイの実施形態の一例を 示す説明図で、 図 1 (a)が平面図、 図 1 (b)が図 1 (a)の I— I断面図、 図 1 c)が図 1 (a )の II— II断面図である。 なお、 これらの図においては、 説明を簡 潔にするため光ファイバが 1本のみ基板に固定された光ファイバアレイの例を示 しているが、 本発明の光ファイバアレイは、 複数の V溝が形成された V溝基板を 使用して、 光ファイバを複数本整列固定して用いることも可能である。  1 (a), 1 (b) and 1 (c) are explanatory views showing an example of an embodiment of an optical fiber array according to the present invention. FIG. 1 (a) is a plan view, and FIG. 1 (b) is FIG. 1 (a). Fig. 1c) is a cross-sectional view taken along line II-II of Fig. 1 (a). In these figures, for simplicity of explanation, an example of an optical fiber array in which only one optical fiber is fixed to a substrate is shown, but the optical fiber array of the present invention has a plurality of V-grooves. It is also possible to align and fix a plurality of optical fibers by using a V-groove substrate on which is formed.
本発明の光ファイバアレイは、 従来と同様に V溝 6が形成された V溝基板 5と、 蓋基板 4とを備える。 また、 これらの基板には、 光ファイバ 1の被覆部 3を支持 するためのザグリ (段差部) 7、 8が形成されている。 これら基板を用いた光フ アイバァレイの組立では、 V溝基板 5の V溝 6上に、 光ファイバ 1先端の被覆を 除去した芯線部 2を載置し、 蓋基板 4にて V溝基板 5の上面より芯線部 2を V溝 6に押しつけて固定する。 図 2はこの芯線部 2の固定状態を示す拡大断面図であ る。 このように固定した状態で、 蓋基板 4、 V溝基板 5及び芯線部 2の間隙に接 着剤 (図示せず) を注入し、 硬化させて一体化する。 The optical fiber array of the present invention includes a V-groove substrate 5 on which a V-groove 6 is formed and a lid substrate 4 as in the related art. In addition, counterbores (step portions) 7 and 8 for supporting the coating portion 3 of the optical fiber 1 are formed on these substrates. Optical fiber using these substrates In assembling the eyelay, the core portion 2 from which the coating at the tip of the optical fiber 1 has been removed is placed on the V-groove 6 of the V-groove substrate 5, and the core portion 2 is applied from the upper surface of the V-groove substrate 5 by the lid substrate 4. Press it into groove 6 and fix it. FIG. 2 is an enlarged cross-sectional view showing a fixed state of the core wire portion 2. In this fixed state, an adhesive (not shown) is injected into the gap between the lid substrate 4, the V-groove substrate 5, and the core wire portion 2, and is cured to be integrated.
そして、 本発明では、 前記のように蓋基板 4に柔らかい樹脂を使用しているの で、 この蓋基板 4による芯線部 2の押しつけの際に、 光ファイバを傷つけること が少なくなる。 蓋基板 4に用いられる樹脂の種類は特に限定されないが、 光ファ ィバを傷つけず、 かつ光ファイバを V溝 6中に保持するに十分な硬度を持つこと が要求されることから、 硬度がロックウェル M 7 0程度の材料、 具体的には、 ポ リカ一ボネート等のエンジニアリングプラスチック材料が好ましい。  In the present invention, since the lid substrate 4 is made of a soft resin as described above, the optical fiber is less likely to be damaged when the core wire portion 2 is pressed by the lid substrate 4. The type of resin used for the lid substrate 4 is not particularly limited, but is required to have sufficient hardness not to damage the optical fiber and to hold the optical fiber in the V-groove 6. A material of about Rockwell M70, specifically, an engineering plastic material such as polycarbonate is preferable.
本発明において樹脂を使用するのは蓋基板 4のみであり、 V溝基板 5について は、 従来と同様に、 ガラス、 シリコン等の硬い材質からなるものを使用する。 ポ リカーボネート等の適切な硬度の樹脂からなる蓋基板 4を使用して、 ガラス、 シ リコン等の硬い材質からなる V溝基板 5に光ファイバ 1の芯線部 2を押し付ける ことにより、 蓋基板 4をガラス、 シリコン等の硬い材質とする通常の光ファイバ アレイと同等のフアイバ位置決め精度を維持できる。  In the present invention, only the lid substrate 4 is made of a resin, and the V-groove substrate 5 is made of a hard material such as glass or silicon as in the related art. The core substrate 2 of the optical fiber 1 is pressed against a V-groove substrate 5 made of a hard material such as glass or silicon by using a lid substrate 4 made of a resin having an appropriate hardness such as polycarbonate. Fiber positioning accuracy equivalent to that of an ordinary optical fiber array made of a hard material such as glass or silicon can be maintained.
なお、 このように蓋基板と V溝基板とを別材質で形成した場合には、 両者の熱 膨張差から、 熱サイクルにて接合部の剥離が生じる可能性があるが  If the lid substrate and the V-groove substrate are made of different materials in this way, the joint may be peeled off by thermal cycling due to the difference in thermal expansion between the two.
、 この問題は、 弾性接着剤等の柔らかい接着剤を使用したり、 接着剤厚を適切に したりすることにより回避することができる。 産業上の利用可能性 However, this problem can be avoided by using a soft adhesive such as an elastic adhesive or by appropriately setting the thickness of the adhesive. Industrial applicability
以上説明したように、 本発明の光ファイバアレイは、 その組立時において、 光 フアイバが基板により傷つけられることが少なく、 そのような傷に起因する光フ アイバの断線が生じ難い。  As described above, in the optical fiber array of the present invention, the optical fiber is less likely to be damaged by the substrate at the time of assembly, and the optical fiber hardly breaks due to such damage.

Claims

請 求 の 範 囲 The scope of the claims
1 . V溝が形成された V溝基板と、 当該 V溝基板に対して一体化される蓋基板 とを備え、 前記 V溝基板の V溝上に、 光ファイバ先端の被覆を除去した芯線部を 載置し、 前記蓋基板にて V溝基板の上面より前記芯線部を V溝に押しつけて固定 する構造を有する光ファイバァレイにおいて、 1. A V-groove substrate on which a V-groove is formed, and a lid substrate integrated with the V-groove substrate. An optical fiber array having a structure in which the core wire is pressed against the V-groove from the upper surface of the V-groove substrate and fixed by the lid substrate.
前記蓋基板のみを榭脂製としたことを特徴とする光ファイバアレイ。  An optical fiber array, wherein only the lid substrate is made of resin.
2 . 前記蓋基板を構成する樹脂が、 前記光ファイバを傷つけず、 かつ前記光フ アイバを前記 V溝中に保持するに十分な硬度を持つ請求の範囲第 1項記載の光フ アイバァレイ。  2. The optical fiber array according to claim 1, wherein the resin constituting the lid substrate has sufficient hardness not to damage the optical fiber and to hold the optical fiber in the V-groove.
3 . 前記蓋基板を構成する樹脂が、 ポリカーボネートである請求の範囲第 1項 記載の光ファイバアレイ。  3. The optical fiber array according to claim 1, wherein the resin constituting the lid substrate is polycarbonate.
PCT/JP1999/006024 1998-11-02 1999-10-29 Optical fiber array using resin lid substrate WO2000026707A1 (en)

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JP10/312224 1998-11-02
JP10312224A JP2000137131A (en) 1998-11-02 1998-11-02 Optical fiber array using resin cover substrate

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