JPH0264508A - Ferrule for fixing constant polarization optical fiber and method for fixing constant polarization optical fiber by using said ferrule - Google Patents

Ferrule for fixing constant polarization optical fiber and method for fixing constant polarization optical fiber by using said ferrule

Info

Publication number
JPH0264508A
JPH0264508A JP21525888A JP21525888A JPH0264508A JP H0264508 A JPH0264508 A JP H0264508A JP 21525888 A JP21525888 A JP 21525888A JP 21525888 A JP21525888 A JP 21525888A JP H0264508 A JPH0264508 A JP H0264508A
Authority
JP
Japan
Prior art keywords
optical fiber
ferrule
polarization
insertion hole
hole
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP21525888A
Other languages
Japanese (ja)
Inventor
Hideki Isono
秀樹 磯野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP21525888A priority Critical patent/JPH0264508A/en
Publication of JPH0264508A publication Critical patent/JPH0264508A/en
Pending legal-status Critical Current

Links

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
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/381Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
    • G02B6/3812Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres having polarisation-maintaining light guides

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

PURPOSE:To fix a constant polarization optical fiber to a ferrule without degrading the extinction ratio thereof by providing an optical fiber insertion hole and an adhesive agent relief part having a prescribed shape to the ferrule. CONSTITUTION:The ferrule for fixing the constant polarization optical fiber is formed with the fiber insertion hole 1 and the adhesive agent relief part 2 having the shape of partially retreating the part where the plane inclusive of the center line of the hole 1 intersects with the wall surface of the hole 1. The optical fiber 3 is inserted into the hole 1 and the adhesive agent 4 is packed into the hole. After the main axis direction of the double refraction of the optical fiber 3 is adjusted in parallel with the relief hole 2, the adhesive agent 4 is cured by heating. Since the coefft. of thermal expansion after curing is larger with the adhesive agent 4, shrinkage force is generated when the fiber is cooled. The tensile force which is larger in the relief part 2 and is small in the rest of the part is then generated. This stress has no bearing to the thickness of the adhesive agent and the mode coupling arises hardly. The degradation in the extinction ratio is thus prevented.

Description

【発明の詳細な説明】 概要 定偏波光ファイバ固定用フェルール及び該フェルールを
使用した定偏波光ファイバの固定方法に関し、 消光比の劣化を招くことなく完備波光ファイバをフエ、
ルールに固定することを目的とし、定偏波光ファイバが
挿入される円柱状の挿入孔と、この挿入孔の中心線を含
む平面が上記挿入孔の壁面と交わるところの近傍を部分
的に後退させた形状の接着剤逃げ部とを具備して構成さ
れるフェルールを使用し、定偏波光ファイバを上記挿入
孔に挿入する工程と、上記挿入孔内において上記定偏波
光ファイバの周囲を熱硬化性接着剤で充填する工程とを
備え、上記定偏波光ファイバの複屈折の主軸方向が上記
平面に平行又は垂直となるように調整した後、上記熱硬
化性接着剤を硬化させるようにして構成する。
[Detailed Description of the Invention] Summary: This invention relates to a ferrule for fixing a fixed polarization optical fiber and a method for fixing a fixed polarization optical fiber using the ferrule.
For the purpose of fixing to the rules, the cylindrical insertion hole into which the constant polarization optical fiber is inserted, and the vicinity of the point where the plane containing the center line of this insertion hole intersects with the wall surface of the insertion hole are partially set back. inserting a polarization-controlled optical fiber into the insertion hole using a ferrule configured with an adhesive relief part having a shape of a ferrule; filling with an adhesive, and after adjusting the main axis direction of birefringence of the polarization constant optical fiber to be parallel or perpendicular to the plane, the thermosetting adhesive is cured. .

産業上の利用分野 本発明は、定偏波光ファイバ固定用フェルール及び該フ
ェルールを使用した定偏波光ファイバの固定方法に関す
る。
INDUSTRIAL APPLICATION FIELD The present invention relates to a ferrule for fixing a polarization constant optical fiber and a method for fixing a polarization constant optical fiber using the ferrule.

通常の軸対称形の単一モード光ファイバにおいては、互
いに直交する2つの独立な基本モード(HE 、+モー
ド)が伝搬可能である。これらのモードのうち、光ファ
イバの軸に垂直な面内のX方向に電界を有する直線偏波
成分をHE、モードとし、同じ面内でX方向と垂直なX
方向に電界を有する直線偏波成分をHE、モードとする
と、光ファイバが完全に軸対称であれば、HEつモード
とHE、モードとは互いに縮退している。しかし、実際
の光ファイバには多少なりとも不可避的な非軸対称性や
曲がりが存在するので、縮退が解けてモード間に結合が
生じる。これによって、(イ) 縮退が解けると偏波分
散が生じ、単一モード光ファイバ通信の情報伝送速度に
制約を与える、 (ロ) 偏波モード間に結合が生じると、光ファイバの
温度変化等の擾乱によって受信端で観察されるHE11
モードの偏波状態が著しく変動し、例えばヘテロダイン
受信方式における受信レベルに致命的な変動が生じる、 等の問題が生じる。このような問題に鑑み、応力複屈折
型の定偏波光ファイバ(本願明細書中単に定偏波光ファ
イバと称する。)が開発された。
In a typical axisymmetric single mode optical fiber, two mutually orthogonal independent fundamental modes (HE, + mode) can propagate. Among these modes, the linearly polarized wave component that has an electric field in the X direction in the plane perpendicular to the axis of the optical fiber is defined as the HE mode, and the
If the linearly polarized wave component having an electric field in the direction is HE mode, then if the optical fiber is completely axially symmetric, the HE mode and the HE mode are mutually degenerate. However, since actual optical fibers have some degree of unavoidable non-axial symmetry or bending, degeneracy is broken and coupling occurs between modes. As a result, (a) polarization dispersion occurs when the degeneracy is resolved, which limits the information transmission speed of single-mode optical fiber communications, and (b) when coupling occurs between polarization modes, temperature changes in the optical fiber, etc. HE11 observed at the receiving end due to the disturbance of
The polarization state of the mode changes significantly, causing problems such as, for example, fatal fluctuations in the reception level in the heterodyne reception system. In view of such problems, a stress birefringence type polarization constant optical fiber (hereinafter simply referred to as a polarization constant optical fiber) has been developed.

定偏波光ファイバは、第3rIAに断面を示すように、
コア3aの両側のクラッド3b中に、例えばクラッド3
bとは熱膨張率の異なる材質からなる応力付与部3Cを
埋設することによって、ファイバの断面上で互いに直交
する2つの方向、即ち、コア3a及び応力付与部3Cを
貫通する主軸方向Xと同断面上でこの方向に直交する方
向yとで異なる応力をコア3aに付与してその屈折率に
異方性をもたせて構成されており、この複屈折性により
、X方向に電界を有するモードとX方向に電界を有する
モード間に伝搬定数差が生じ、特定のモードを保持する
ことができるようになっている・この種の定偏波光ファ
イバを光コネクタ接続する場合、あるいは、定偏波光フ
ァイバを入出力光伝送路とするバルク型光デバイスを構
成するためにファイバコリメータを作成する場合、ファ
イバをフェルールに固定することが不可欠であり、この
固定に際してはファイバに外力が加わることを避けるこ
とができないから、外力により定偏波光ファイバの特性
が劣化しないような固定方法が要望されている。
As the cross section of the polarization-controlled optical fiber is shown in the third rIA,
In the cladding 3b on both sides of the core 3a, for example, the cladding 3
By embedding the stress-applying portion 3C made of materials with different coefficients of thermal expansion, b is the same as the main axis direction X that passes through the core 3a and the stress-applying portion 3C. It is constructed by applying different stresses to the core 3a in the direction y orthogonal to this direction on the cross section to give its refractive index anisotropy, and due to this birefringence, it is possible to create a mode with an electric field in the X direction. A propagation constant difference occurs between modes that have an electric field in the When creating a fiber collimator to construct a bulk optical device that uses a fiber as an input/output optical transmission path, it is essential to fix the fiber to a ferrule, and when fixing it, it is important to avoid applying external force to the fiber. Therefore, there is a need for a fixing method that prevents the characteristics of polarization-controlled optical fibers from deteriorating due to external forces.

従来の技術 第7図は、従来の一般的なフェルール及びこのフェルー
ルを使用した定偏波光ファイバの固定方法を説明するた
めの図である。例えば円柱外形を有するフェルール20
には、その中心部に小径の挿入孔21及び大径の挿入孔
22が形成されて右り、被覆30が部分的に除去された
定偏波光ファイバ3を挿入孔21に挿入し、その周囲を
接着剤23で充填することによって、定偏波光ファイバ
の固定がなされている。
BACKGROUND ART FIG. 7 is a diagram for explaining a conventional general ferrule and a method of fixing a polarization-controlled optical fiber using this ferrule. For example, a ferrule 20 having a cylindrical outer shape
A small-diameter insertion hole 21 and a large-diameter insertion hole 22 are formed in the center, and the polarization-controlled optical fiber 3 from which the coating 30 has been partially removed is inserted into the insertion hole 21, and the surrounding area is The fixed polarization optical fiber is fixed by filling with adhesive 23.

発明が解決しようとする課題 しかし、上述した構成のフェルール、及び定偏波光ファ
イバの固定方法であると、第8図に示すように、実際上
、定偏波光ファイバ3と挿入孔21間に充填された接着
剤23の厚みがファイバの周方向で不均一になり、接着
剤23に残留した収縮力の差等に応じて、ファイバ内に
は応力付与部による所定の複屈折率とは異なる屈折率特
性が生じることになる。このように複屈折率特性が変化
すると、ときとしてモード結合が増加し、即ち消光比が
劣化し、定偏波光ファイバの所要の特性を維持すること
ができなくなるという問題が生じる。
Problems to be Solved by the Invention However, with the ferrule having the above-described configuration and the fixing method of the polarization-controlled optical fiber, as shown in FIG. The thickness of the adhesive 23 becomes uneven in the circumferential direction of the fiber, and depending on the difference in shrinkage force remaining in the adhesive 23, the fiber has a refractive index different from the predetermined birefringence due to the stress applying part. rate characteristics will occur. When the birefringence characteristics change in this way, a problem arises in that mode coupling sometimes increases, that is, the extinction ratio deteriorates, making it impossible to maintain the required characteristics of the polarization-controlled optical fiber.

本発明はこのような事情に鑑みて創作されたもので、消
光比の劣化を招くことなく定偏波光ファイバをフェルー
ルに固定する固定方法の提供を目的としている。又、本
発明は、上記方法を実現するために使用することのでき
るフェルールの提供を目的としている。
The present invention was created in view of these circumstances, and aims to provide a fixing method for fixing a polarization-controlled optical fiber to a ferrule without causing deterioration of the extinction ratio. The present invention also aims to provide a ferrule that can be used to implement the above method.

課題を解決するための手段 第1図は本発明の原理図である。Means to solve problems FIG. 1 is a diagram showing the principle of the present invention.

本発明の定偏波光ファイバ固定用フェルールは、同図(
a)に示すように、定偏波光ファイバが挿入される円柱
状の挿入孔1と、この挿入孔1の中心線を含む平面が上
記挿入孔1の壁面と交わるところの近傍を部分的に後退
させた形状の接着剤逃げ部2とを具備して構成されてい
る。
The ferrule for fixing a constant polarization optical fiber of the present invention is shown in the same figure (
As shown in a), the cylindrical insertion hole 1 into which the constant polarization optical fiber is inserted, and the vicinity of the point where the plane including the center line of the insertion hole 1 intersects with the wall surface of the insertion hole 1 are partially retreated. The adhesive escaping portion 2 has a curved shape.

このフェルールを使用して定偏波光ファイバを固定する
場合には、同図(−b〉に示すように、定偏波光ファイ
バ3を挿入孔lに挿入する工程と、挿入孔1内において
定偏波光ファイバ3の周囲を熱硬化性接着剤4で充填す
る工程とを経て、同図(C)に示すように、定偏波光フ
ァイバ3の複屈折の主軸方向が上記平面に平行となるよ
うに調整するか、あるいは、同図(d)に示すように、
垂直となるように調整した後、熱硬化性接着剤4を硬化
させるようにする。
When fixing a constant polarization optical fiber using this ferrule, as shown in the same figure (-b), the process of inserting the constant polarization optical fiber 3 into the insertion hole l, and the process of inserting the constant polarization optical fiber into the insertion hole 1. After the process of filling the periphery of the wave optical fiber 3 with a thermosetting adhesive 4, the main axis direction of the birefringence of the polarization-controlled optical fiber 3 is parallel to the above-mentioned plane, as shown in the same figure (C). Or, as shown in Figure (d),
After adjusting it so that it is vertical, the thermosetting adhesive 4 is cured.

作   用 定偏波光ファイバにそのコアに向かって側圧を加えた場
合に生じるモード結合量を、第3図に示すように、その
側圧の作用方向のファイバ主軸からの角度θを変化させ
て測定したところ、モード結合は、主軸方向若しくは主
軸方向に直角な方向又はこれらの方向に近い方向からの
応力に対してはほとんど生じず、これらの方向以外の方
向からの応力に対してモード結合が生じていることが明
らかになった。この事実に着目しつつ本発明の詳細な説
明する。
The amount of mode coupling that occurs when a lateral pressure is applied toward the core of an action-constant polarization optical fiber was measured by varying the angle θ of the direction of action of the lateral pressure from the main axis of the fiber, as shown in Figure 3. However, mode coupling hardly occurs in response to stress from the principal axis direction, a direction perpendicular to the principal axis direction, or a direction close to these directions, and mode coupling does not occur in response to stress from directions other than these directions. It became clear that there was. The present invention will be explained in detail while paying attention to this fact.

第2図は、例えば第1図(c)の状態で熱硬化性接着剤
を固化させたときの定偏波光ファイバに作用する応力分
布を説明するための図である。熱硬化性接着剤は、一般
に、定偏波光ファイバを使用する温度よりも高い温度(
例えば60℃)で硬化し、又、硬化後の線熱膨張係数は
、定偏波光ファイバやフェルールの材質と比較して大き
い。このため、熱硬化性接着剤を硬化させた後常温まで
冷却すると、固化部分には収縮力が生じ、その結果、定
偏波光ファイバには半径方向に引張力が作用し、その応
力分布は第2図に示すようになる。
FIG. 2 is a diagram for explaining the stress distribution acting on the polarization constant optical fiber when the thermosetting adhesive is solidified in the state shown in FIG. 1(c), for example. Thermosetting adhesives are typically used at temperatures higher than those used with polarization-controlled optical fibers (
For example, it is cured at a temperature of 60° C.), and its linear thermal expansion coefficient after curing is larger than that of the polarization-constant optical fiber or the material of the ferrule. Therefore, when the thermosetting adhesive is cured and then cooled to room temperature, a contraction force is generated in the solidified part, and as a result, a tensile force acts on the polarization constant optical fiber in the radial direction, and the stress distribution is The result will be as shown in Figure 2.

即ち、接着剤逃げ部2に対応する部分については比較的
大きな力が作用し、それ以外の部分については比較的小
さな力が作用する。そして、この応力の大小関係は、接
着剤逃げ部2に対応しない部分における接着剤の厚みが
不均一であっても大きく変化することはないから、モー
ド結合が生じにくくなり、消光比の劣化が防止される。
That is, a relatively large force acts on the portion corresponding to the adhesive escape portion 2, and a relatively small force acts on the other portions. Since the magnitude relationship of this stress does not change significantly even if the thickness of the adhesive is uneven in the part that does not correspond to the adhesive escape part 2, mode coupling is less likely to occur, and the extinction ratio is less likely to deteriorate. Prevented.

実  施  例 以下本発明の実施例を図面に基づいて説明する。Example Embodiments of the present invention will be described below based on the drawings.

第4図は本発明の実施例を示す定偏波光ファイバ固定用
フェルールの縦断面図(a)及び横断面図(b)である
。11は例えばセラミックスからなる円柱外形を有する
フェルールブロックであり、このフェルールブロック1
1には、その中心部に、定偏波光ファイバを直接挿入す
るための小径の挿入孔12とファイバの被覆部分を挿入
するための大径の挿入孔13とが同軸上に形成されてい
る。
FIG. 4 is a vertical cross-sectional view (a) and a cross-sectional view (b) of a ferrule for fixing a constant polarization optical fiber, showing an embodiment of the present invention. Reference numeral 11 denotes a ferrule block made of ceramics and having a cylindrical outer shape, and this ferrule block 1
1 has a small-diameter insertion hole 12 for directly inserting a polarization-constant optical fiber and a large-diameter insertion hole 13 for inserting a coated portion of the fiber coaxially.

14は挿入孔12からフェルールブロック11の側面に
貫通する接着剤逃げ孔であり、この実施例では6つの接
着剤逃げ孔14が3つづつ互いに対向するように設けら
れている。挿入孔12.13及び接着剤逃げ孔14は、
セラミックスからなるフェルールブロック11を例えば
焼結により形成するに際して中子を使用する等の通常の
方法により容易に形成することができる。
Reference numeral 14 denotes an adhesive escape hole passing through the side surface of the ferrule block 11 from the insertion hole 12, and in this embodiment, six adhesive escape holes 14 are provided, three each facing each other. The insertion hole 12.13 and the adhesive escape hole 14 are
The ferrule block 11 made of ceramic can be easily formed by a conventional method such as using a core when forming the ferrule block 11 by sintering, for example.

第5図は、第4図に示されるフェルールの挿入孔に定偏
波光ファイバを挿入しその周囲を熱硬化性接着剤で充填
する方法を説明するための図である。先ず、同図(a)
に示すように、大径の挿入孔13に熱硬化性接着剤4を
充填しておく。そして、同図(b)に示すように、部分
的に被覆30が除去された定偏波光ファイバ3を、大径
の挿入孔13の側から小径の挿入孔12に挿入する。こ
のとき、熱硬化性接着剤4は適度な粘性を有しているか
ら、定偏波光ファイバ3の移動に伴って、小径の挿入孔
12及び接着剤逃げ孔14に熱硬化性接着剤4が導かれ
る。このように、本実施例では、定偏波光ファイバ3を
挿入することによって熱硬化性接着剤4の充填を行って
いるので作業が容易である。熱硬化性接着剤の粘性等の
問題によってこの方法を使用し得ない場合には、予め挿
入孔12.13及び接着剤逃げ孔14に熱硬化性接着剤
を充填しておいた後に定偏波光ファイバ3を挿入するよ
うにしても良いし、定偏波光ファイバ3を挿入孔12に
挿入した後に熱硬化性接着剤を充填するようにしても良
い。
FIG. 5 is a diagram for explaining a method of inserting a polarization-constant optical fiber into the insertion hole of the ferrule shown in FIG. 4 and filling the surrounding area with a thermosetting adhesive. First, the same figure (a)
As shown in FIG. 2, the large-diameter insertion hole 13 is filled with thermosetting adhesive 4. Then, as shown in FIG. 2B, the polarization-constant optical fiber 3 from which the coating 30 has been partially removed is inserted into the small-diameter insertion hole 12 from the large-diameter insertion hole 13 side. At this time, since the thermosetting adhesive 4 has an appropriate viscosity, as the polarization-controlled optical fiber 3 moves, the thermosetting adhesive 4 is applied to the small diameter insertion hole 12 and the adhesive escape hole 14. be guided. In this way, in this embodiment, the thermosetting adhesive 4 is filled by inserting the constant polarization optical fiber 3, so that the work is easy. If this method cannot be used due to problems such as the viscosity of the thermosetting adhesive, fill the insertion holes 12 and 13 and the adhesive escape hole 14 with thermosetting adhesive in advance, and then apply polarized light. The fiber 3 may be inserted, or the polarization-constant optical fiber 3 may be inserted into the insertion hole 12 and then filled with a thermosetting adhesive.

定偏波光ファイバを挿入して接着剤が充填されたフェル
ールは、ファイバの主軸方向を接着剤逃げ孔14の貫通
方向と平行又は垂直となるように位置調整を行った後に
、熱硬化性接着剤4の硬化温度よりも高い温度に加熱さ
れ、これにより定偏波光ファイバのフェルールへの固定
が完了する。
After inserting the constant polarization optical fiber and filling the ferrule with adhesive, adjust the position so that the main axis direction of the fiber is parallel or perpendicular to the penetration direction of the adhesive escape hole 14, and then insert the thermosetting adhesive into the ferrule. It is heated to a temperature higher than the curing temperature of step 4, thereby completing fixing of the polarization-constant optical fiber to the ferrule.

このようにして固定された定偏波光ファイバには、前述
したようにモード結合がほとんど生じていないので、例
えばこのフェルールを用いて光コネクタを構成したとき
に、高い消光比を得ることが可能になる。
As mentioned above, almost no mode coupling occurs in the fixed polarization optical fiber fixed in this way, so when an optical connector is constructed using this ferrule, for example, it is possible to obtain a high extinction ratio. Become.

第6図は本°発明の他の実施例を示す定偏波光ファイバ
固定用フェルールの横断面図であり、この実施例では、
接着剤逃げ孔14に直交する方向に、挿入孔12からフ
ェルールブロック11の側面に貫通する別の接着剤逃げ
孔14°、14′を設けている。このような構成によっ
ても、接着剤逃げ孔に対応しない部分における接着剤の
厚みが不均一であったとしても、前実施例と同様にモー
ド結合量を減少させて消光比の劣化を防止することがで
きる。
FIG. 6 is a cross-sectional view of a ferrule for fixing a polarization-controlled optical fiber showing another embodiment of the present invention, and in this embodiment,
Other adhesive escape holes 14° and 14' are provided in a direction perpendicular to the adhesive escape hole 14, passing through the side surface of the ferrule block 11 from the insertion hole 12. With such a configuration, even if the thickness of the adhesive is uneven in the portion that does not correspond to the adhesive escape hole, the amount of mode coupling can be reduced and deterioration of the extinction ratio can be prevented as in the previous embodiment. Can be done.

発明の効果 以上詳述したように、本発明によれば、消光比の劣化を
招くことなく定偏波光ファイバをフェルールに固定する
ことが可能になるという効果を奏する。
Effects of the Invention As detailed above, according to the present invention, it is possible to fix a polarization constant optical fiber to a ferrule without causing deterioration of the extinction ratio.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の原理図、 第2図は本発明の作用説明図、 第3図は本発明の原理説明補助図、 第4図は本発明の実施例を示す定偏波光ファイバ固定用
フェルールの縦断面図(a)及び横断面図(b)、 第5図は本発明の実施例図であって、定偏波光ファイバ
を挿入孔に挿入し熱硬化性接着剤を充填する工程を説明
するための図、 第6図は本発明の他の実施例を示す定偏波光ファイバ固
定用フェルールの横断面図、 第7図は従来技術を説明するた砧の図、第8図は従来技
術における問題点を説明するための図である。 15調5 日月 0 イ¥用 説 日月 図第2図 1.12・・・挿入孔、  2・・・接着剤逃げ部、3
・・・定偏波光ファイバ、4・・・熱硬化性接着剤、1
4.14°・・・接着剤逃げ孔。 a 参で明へ」環す尤咽ネ市フ方図 第3図 (b) V 命弐ら イ列 ニオ°! 冴n 第5図 イ8 /l 貨 )海ちイダリ 前面 画策6図 開ス頁、杖?危日月 囮 第8図
Fig. 1 is a diagram of the principle of the present invention, Fig. 2 is an explanatory diagram of the operation of the present invention, Fig. 3 is a supplementary diagram for explaining the principle of the present invention, and Fig. 4 is a diagram showing an embodiment of the present invention for fixing polarization optical fiber. A vertical cross-sectional view (a) and a cross-sectional view (b) of the ferrule, and FIG. Figure 6 is a cross-sectional view of a ferrule for fixing a polarized optical fiber showing another embodiment of the present invention, Figure 7 is a diagram explaining the prior art, and Figure 8 is a diagram illustrating the prior art. FIG. 2 is a diagram for explaining problems in the technology. 15th scale 5 Sun/Moon 0 I\'s theory Sun/Moon Figure 2 1.12...Insertion hole, 2...Adhesive escape part, 3
... Constant polarization optical fiber, 4 ... Thermosetting adhesive, 1
4.14°...Adhesive escape hole. a. ``Go to the light'', a map of the city of Yakuhin, Figure 3 (b). Sae n Fig. 5 I8 /l Coin) Umichi Idari Front Plane 6 open page, cane? Kikitsuki Decoy Figure 8

Claims (2)

【特許請求の範囲】[Claims] (1)定偏波光ファイバが挿入される円柱状の挿入孔(
1)と、 この挿入孔(1)の中心線を含む平面が上記挿入孔(1
)の壁面と交わるところの近傍を部分的に後退させた形
状の接着剤逃げ部(2)とを具備して構成されることを
特徴とする定偏波光ファイバ固定用フェルール。
(1) A cylindrical insertion hole into which a constant polarization optical fiber is inserted (
1), and the plane including the center line of this insertion hole (1) is the insertion hole (1).
2. A ferrule for fixing a polarization-controlled optical fiber, characterized in that the adhesive escape part (2) has an adhesive relief part (2) partially set back in the vicinity of the part where it intersects with the wall surface of the ferrule.
(2)請求項1記載のフェルールを使用した定偏波光フ
ァイバの固定方法であって、 定偏波光ファイバ(3)を上記挿入孔(1)に挿入する
工程と、上記挿入孔(1)内において上記定偏波光ファ
イバ(3)の周囲を熱硬化性接着剤(4)で充填する工
程とを備え、 上記定偏波光ファイバ(3)の複屈折の主軸方向が上記
平面に平行又は垂直となるように調整した後、上記熱硬
化性接着剤(4)を硬化させるようにしたことを特徴と
する定偏波光ファイバの固定方法。
(2) A method for fixing a polarization-controlled optical fiber using the ferrule according to claim 1, comprising the steps of: inserting the polarization-controlled optical fiber (3) into the insertion hole (1); filling the periphery of the constant polarization optical fiber (3) with a thermosetting adhesive (4), and the main axis direction of birefringence of the constant polarization optical fiber (3) is parallel or perpendicular to the plane. A method for fixing a polarization-constant optical fiber, characterized in that the thermosetting adhesive (4) is cured after adjusting the polarization-constant optical fiber.
JP21525888A 1988-08-31 1988-08-31 Ferrule for fixing constant polarization optical fiber and method for fixing constant polarization optical fiber by using said ferrule Pending JPH0264508A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21525888A JPH0264508A (en) 1988-08-31 1988-08-31 Ferrule for fixing constant polarization optical fiber and method for fixing constant polarization optical fiber by using said ferrule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21525888A JPH0264508A (en) 1988-08-31 1988-08-31 Ferrule for fixing constant polarization optical fiber and method for fixing constant polarization optical fiber by using said ferrule

Publications (1)

Publication Number Publication Date
JPH0264508A true JPH0264508A (en) 1990-03-05

Family

ID=16669333

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21525888A Pending JPH0264508A (en) 1988-08-31 1988-08-31 Ferrule for fixing constant polarization optical fiber and method for fixing constant polarization optical fiber by using said ferrule

Country Status (1)

Country Link
JP (1) JPH0264508A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0609841A3 (en) * 1993-02-02 1994-12-28 Sumitomo Electric Industries Optical connector with adhesive.
JP2000028853A (en) * 1998-07-07 2000-01-28 Fujikura Ltd Optical connector
WO2001029509A1 (en) * 1999-10-18 2001-04-26 Matsushita Electric Industrial Co., Ltd. Angular speed sensor
US6322884B1 (en) * 1999-02-09 2001-11-27 Elop Electrio-Optics Industries Ltd. Method bonding an optical element within an enclosure
JP2002055253A (en) * 2000-08-10 2002-02-20 Fujikura Ltd Optical multiplexer / demultiplexer
US7194160B2 (en) 2002-02-14 2007-03-20 Nippon Sheet Glass Co., Ltd. Filter module
US7195400B2 (en) 2000-01-06 2007-03-27 Fujikura Ltd. Optical connector and assembling method for the same
JP2008090004A (en) * 2006-10-02 2008-04-17 Matsushita Electric Works Ltd Photoelectric conversion connector and manufacturing method
JP2012083634A (en) * 2010-10-14 2012-04-26 Yazaki Corp Ferrule, and adhesion fixing structure of ferrule and optical fiber
WO2016129505A1 (en) * 2015-02-13 2016-08-18 古河電気工業株式会社 Optical-fiber affixing structure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63118107A (en) * 1986-11-06 1988-05-23 Nec Corp Ferrule for optical fiber connection

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63118107A (en) * 1986-11-06 1988-05-23 Nec Corp Ferrule for optical fiber connection

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5422971A (en) * 1993-02-02 1995-06-06 Sumitomo Electric Industries, Ltd. Optical fiber connector using adhesive
EP0609841A3 (en) * 1993-02-02 1994-12-28 Sumitomo Electric Industries Optical connector with adhesive.
JP2000028853A (en) * 1998-07-07 2000-01-28 Fujikura Ltd Optical connector
US6322884B1 (en) * 1999-02-09 2001-11-27 Elop Electrio-Optics Industries Ltd. Method bonding an optical element within an enclosure
US6619122B1 (en) 1999-10-18 2003-09-16 Matsushita Electric Industrial Co., Ltd. Angular speed sensor
WO2001029509A1 (en) * 1999-10-18 2001-04-26 Matsushita Electric Industrial Co., Ltd. Angular speed sensor
US7195400B2 (en) 2000-01-06 2007-03-27 Fujikura Ltd. Optical connector and assembling method for the same
JP2002055253A (en) * 2000-08-10 2002-02-20 Fujikura Ltd Optical multiplexer / demultiplexer
US7194160B2 (en) 2002-02-14 2007-03-20 Nippon Sheet Glass Co., Ltd. Filter module
JP2008090004A (en) * 2006-10-02 2008-04-17 Matsushita Electric Works Ltd Photoelectric conversion connector and manufacturing method
US7510336B2 (en) 2006-10-02 2009-03-31 Matsushita Electric Works, Ltd. Plug-socket connector apparatus for optical fiber termination
JP2012083634A (en) * 2010-10-14 2012-04-26 Yazaki Corp Ferrule, and adhesion fixing structure of ferrule and optical fiber
WO2016129505A1 (en) * 2015-02-13 2016-08-18 古河電気工業株式会社 Optical-fiber affixing structure
JPWO2016129505A1 (en) * 2015-02-13 2017-11-24 古河電気工業株式会社 Optical fiber fixing structure
US10551576B2 (en) 2015-02-13 2020-02-04 Furukawa Electric Co., Ltd. Optical fiber fixing structure

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