JPH01271712A - Optical connector plug - Google Patents

Optical connector plug

Info

Publication number
JPH01271712A
JPH01271712A JP10206888A JP10206888A JPH01271712A JP H01271712 A JPH01271712 A JP H01271712A JP 10206888 A JP10206888 A JP 10206888A JP 10206888 A JP10206888 A JP 10206888A JP H01271712 A JPH01271712 A JP H01271712A
Authority
JP
Japan
Prior art keywords
ferrule
optical
cylindrical member
optical connector
connector plug
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
JP10206888A
Other languages
Japanese (ja)
Inventor
Yasuchika Komatsu
耕哉 小松
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP10206888A priority Critical patent/JPH01271712A/en
Publication of JPH01271712A publication Critical patent/JPH01271712A/en
Pending legal-status Critical Current

Links

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
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
    • G02B6/3812—Dismountable 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
    • 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
    • G02B6/3869—Mounting ferrules to connector body, i.e. plugs

Abstract

PURPOSE:To secure high positioning accuracy and to realize low-loss connection by pressing a wedge in between a cylindrical member and a ferrule and fixing the both. CONSTITUTION:The wedge 3 is pressed in between the ferrule 1 and cylindrical member 2 and both fixed. The front surface part of the inner periphery of the cylindrical member 2 is chamferred so as to facilitate the pressing of the wedge 3. When the optical connector plug is assembled, the end surface of the ferrule 1 is observed by using a microscope to confirm the polarizing direction of a polarization plane maintaining fiber held by it, and the ferrule 1 is marked. Then the ferrule 1 and cylindrical member 2 are combined coaxially so that the marked position meets the projection part 2a of the cylindrical member 2, and the wedge 3 is pressed in between both in this state. Consequently, continuous positioning is enabled, the high positioning accuracy is secured, and the connection loss is reduced.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、光通信システムなどで光ファイバの接続に利
用される光コネクタプラグに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an optical connector plug used for connecting optical fibers in optical communication systems and the like.

（従来の技術） 光通信システムなどでは、光ファイバを接続するために
光コネクタが使用される。(Prior Art) In optical communication systems, optical connectors are used to connect optical fibers.

この光コネクタの典型的なものは、光アダプタの両端か
ら２個の光コネクタプラグを嵌合させ、この光アダプタ
の中央部分において各光コネクタプラグ内のフェルール
に保持された光ファイバの先端を突き合わせることによ
り光ファイバの光学的接続を完成させる構造となってい
る。また、この光コネクタでは、光アダプタ側に切り欠
きを設けると共にこの切り欠きに嵌合せしめられる突出
部を光コネクタプラグに設け、両者が共通の軸線の回り
に回転することを防止する構造となっている。In a typical optical connector, two optical connector plugs are fitted from both ends of an optical adapter, and the tips of the optical fibers held in the ferrules in each optical connector plug are butted together in the center of the optical adapter. This structure allows the optical connection of optical fibers to be completed. In addition, this optical connector has a structure in which a notch is provided on the optical adapter side and a protrusion that fits into the notch is provided on the optical connector plug to prevent both from rotating around a common axis. ing.

更に、接続損失を低減するために、上記光コネクタプラ
グの突出部の位置は、フェルール内の光ファイバコアの
偏心方向を基準に所定の位置に位置決めされる構造とな
っている。このような回転止めと位置決めの機構を備え
た光コネクタは、特願昭６２−１６９７３３号などに開
示されている。Further, in order to reduce connection loss, the protrusion of the optical connector plug is positioned at a predetermined position with respect to the eccentric direction of the optical fiber core within the ferrule. An optical connector equipped with such a rotation stopper and positioning mechanism is disclosed in Japanese Patent Application No. 169733/1984.

上述の光コネクタプラグは、第３図の要部断面図に示す
ように、外周部に複数個の溝１１を有するフェルール１
０と、先端部分に突出部２２を有すると共に内周部に突
起部２１を有する筒状部材２０とから構成される。筒状
部材２０の突出部２２がフェルールＩＯ内に保持された
光フアイバコアの偏心方向に最も近くなるように、フェ
ルール１０に形成された複数の溝１１の一つが選択され
これに突起部２１が嵌合される。この後、筒状部材２０
は心線４２を保持する光フアイバケーブル４０の耐張力
部材４１と共にフェルール１０に圧着固定される。The above-mentioned optical connector plug has a ferrule 1 having a plurality of grooves 11 on the outer periphery, as shown in the cross-sectional view of the main part in FIG.
0, and a cylindrical member 20 having a protrusion 22 at its tip and a protrusion 21 at its inner circumference. One of the plurality of grooves 11 formed in the ferrule 10 is selected and the protrusion 21 is fitted into it so that the protrusion 22 of the cylindrical member 20 is closest to the eccentric direction of the optical fiber core held in the ferrule IO. will be combined. After this, the cylindrical member 20
is crimped and fixed to the ferrule 10 together with the tensile strength member 41 of the optical fiber cable 40 that holds the core wire 42 .

（発明が解決しようとする課題） 上記従来の光コネクタプラグでは、フェルール１０に形
成可能な溝１１の数は寸法上の制約から４本〜８本程度
である。従って、フェルール１０の周方向における筒状
部材２０の突出部２２の位置決めは、４５°〜９０°程
度の粗い間隔でしか行うことができない。(Problems to be Solved by the Invention) In the conventional optical connector plug described above, the number of grooves 11 that can be formed in the ferrule 10 is about 4 to 8 due to dimensional constraints. Therefore, positioning of the protruding portion 22 of the cylindrical member 20 in the circumferential direction of the ferrule 10 can only be performed at rough intervals of about 45° to 90°.

従来の光ファイバを用いてコア偏心方向と筒状部材２０
の突出部２２を合わせるには、４５°〜９０°程度の精
度で十分であった。しかしながら、偏波面保存光ファイ
バでは光フアイバ内の偏波方向を一致させて接続する必
要があり、５°程度の回転位置精度が必要になる。すな
わち、従来構造の光コネクタプラグの位置決め精度より
も１桁以上高い位置決め精度が必要になる。Core eccentricity direction and cylindrical member 20 using conventional optical fiber
An accuracy of about 45° to 90° was sufficient for aligning the protruding portions 22 of. However, polarization-maintaining optical fibers need to be connected with the polarization directions within the optical fibers matching, and rotational position accuracy of about 5° is required. That is, positioning accuracy that is one or more orders of magnitude higher than that of an optical connector plug with a conventional structure is required.

また、フェルール１０の外周部の溝１１と筒状部材２０
の突起部２１とを形成せず、光フアイバケーブル４０の
耐張力部材４１を圧着固定する際に、筒状部材２０の突
出部２２を直接位置決めしながら圧着固定する構造も考
えられる。しかしながらこの構造では、圧着時に筒状部
材２０の回転を十分に防止することが困難なため、高精
度の位置決めは望めない。In addition, the groove 11 on the outer circumference of the ferrule 10 and the cylindrical member 20
It is also possible to consider a structure in which the protrusion 22 of the cylindrical member 20 is directly positioned while being crimped and fixed when the tensile strength member 41 of the optical fiber cable 40 is crimped and fixed without forming the protrusion 21 . However, with this structure, it is difficult to sufficiently prevent rotation of the cylindrical member 20 during crimping, so highly accurate positioning cannot be expected.

本発明の光コネクタプラグは、中心において軸線方向に
延在される光ファイバを保持するフェルールと、このフ
ェルールの外側にこれと同軸状に配置されると共に光ア
ダプタに形成される切り欠き部に嵌合される突出部を先
端部に有する筒状部材と、この筒状部材とフェルールと
の間に圧入され双方を固着する（さびとを備え、連続的
な位置決めを可能とするように構成されている。The optical connector plug of the present invention includes a ferrule that holds an optical fiber extending in the axial direction at the center, and a notch that is arranged coaxially with the ferrule on the outside and that fits into a notch formed in an optical adapter. A cylindrical member having a protrusion at its tip to be mated, and a ferrule that is press-fitted between the cylindrical member and the ferrule to fix them together (with a ferrule and configured to enable continuous positioning). There is.

以下、本発明の作用を実施例と共に詳細に説明する。Hereinafter, the operation of the present invention will be explained in detail together with examples.

（実施例） 第１図と第２図は、それぞれ本発明の一実施例の光コネ
クタプラグの要部断面図と斜視図であり、１はフェルー
ル、２は筒状部材、３はくさび、４は光フアイバケーブ
ル、５はツマミ、６はスナップリングである。(Embodiment) FIGS. 1 and 2 are a sectional view and a perspective view of essential parts of an optical connector plug according to an embodiment of the present invention, respectively, in which 1 is a ferrule, 2 is a cylindrical member, 3 is a wedge, and 4 is a perspective view of a main part of an optical connector plug according to an embodiment of the present invention. is an optical fiber cable, 5 is a knob, and 6 is a snap ring.

フェルール１は、中心において軸線方向に延在される光
ファイバを保持している。筒状部材２は、フェルールｌ
の外側にこれと同軸状に配置されると共に光アダプタに
形成される切り欠き部に嵌合される突出部１ａを先端部
に有している。くさび３は、フェルール１と筒状部材２
との間に圧入され双方を固着する。筒状部材２の内周の
前面部分には、くさび３の圧入を容易にするため面取り
２ｂが設けられている。The ferrule 1 holds an axially extending optical fiber at its center. The cylindrical member 2 has a ferrule l
The optical adapter has a protrusion 1a at its tip, which is disposed coaxially with the outer side of the optical adapter and is fitted into a notch formed in the optical adapter. The wedge 3 connects the ferrule 1 and the cylindrical member 2.
It is press-fitted between the two and fixes both. A chamfer 2b is provided on the front surface of the inner periphery of the cylindrical member 2 to facilitate press-fitting of the wedge 3.

この光コネクタプラグを組み立てるには、まずフェルー
ル１の端面を顕微鏡を用いて観察し、これに保持されて
いる偏波面保存ファイバの偏波方向を確認し、フェルー
ル１にマーキングを行う。To assemble this optical connector plug, first, the end face of the ferrule 1 is observed using a microscope, the polarization direction of the polarization maintaining fiber held therein is confirmed, and the ferrule 1 is marked.

次に、フェルール１のマーキングされた位置が筒状部材
２の突出部２ａと一致する様に、フェルール１と筒状部
材２を同軸状に組合せ、この状態で双方の間にくさび３
を圧入する。Next, the ferrule 1 and the cylindrical member 2 are coaxially assembled so that the marked position of the ferrule 1 matches the protrusion 2a of the cylindrical member 2, and in this state, a wedge 3 is inserted between the two.
Press in.

また、この後に従来の光コネクタプラグ構造と同様に、
筒状部材２とフェルール１の中間部に光フアイバケーブ
ル４の耐張力部材４ｂを事前に挟み、別途圧着すること
も可能である。Also, after this, similar to the conventional optical connector plug structure,
It is also possible to sandwich the tension-resistant member 4b of the optical fiber cable 4 between the cylindrical member 2 and the ferrule 1 in advance and press-bond them separately.

（発明の効果） 以上詳細に説明したように、本発明の光コネクタプラグ
は、筒状部材とフェルールとの間にくさびを圧入して双
方を固着する構成であるから、筒状部材の突出部をフェ
ルールの外周上の任意の位置に位置決めできる。(Effects of the Invention) As explained in detail above, the optical connector plug of the present invention has a structure in which a wedge is press-fitted between the cylindrical member and the ferrule to fix both, so that the protrusion of the cylindrical member can be positioned at any position on the outer circumference of the ferrule.

この結果、偏波面保存光ファイバの接続の際に要求され
る高い位置決め精度を満足し、低損失の接続が実現でき
る。As a result, it is possible to satisfy the high positioning accuracy required when connecting polarization-maintaining optical fibers and realize a connection with low loss.

また、くさびの圧入後に光フアイバケーブルの耐張力部
材を圧着固定する場合でも、筒状部材とフェルールとの
位置ずれが生ずるおそれがない。Furthermore, even when the tension-resistant member of the optical fiber cable is crimped and fixed after the wedge is press-fitted, there is no risk of misalignment between the cylindrical member and the ferrule.

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

第１図と第２図は本発明の一実施例の光コネクタプラグ
の要部断面図と斜視図、第３図は従来の光コネクタプラ
グの要部断面図である。 １・・・フェルール、２・・・筒状部材、２ａ・・・突
出部、２ｂ・・・面取り部、３・・・くさび、４・・・
光フアイバケーブル、４ａ・・・心線、４ｂ・・・耐張
力部材。1 and 2 are a sectional view and a perspective view of a main part of an optical connector plug according to an embodiment of the present invention, and FIG. 3 is a sectional view of a main part of a conventional optical connector plug. DESCRIPTION OF SYMBOLS 1... Ferrule, 2... Cylindrical member, 2a... Protrusion part, 2b... Chamfered part, 3... Wedge, 4...
Optical fiber cable, 4a... core wire, 4b... tensile strength member.

Claims (1)

【特許請求の範囲】 光アダプタの両端から２個の光コネクタプラグを嵌合さ
せ、この光アダプタの中央部分において各光コネクタプ
ラグ内のフェルールに保持された光ファイバの先端を突
き合わせることにより光ファイバの光学的接続を完成さ
せる構造の光コネクタの光コネクタプラグであって、 中心において軸線方向に延在される光ファイバを保持す
るフェルールと、 このフェルールの外側にこれと同軸状に配置されると共
に光アダプタに形成される切り欠き部に嵌合される突出
部を先端部に有する筒状部材と、この筒状部材と前記フ
ェルールとの間に圧入され双方を固着するくさびとを備
えたことを特徴とする光コネクタプラグ。[Claims] By fitting two optical connector plugs from both ends of an optical adapter, and abutting the tips of the optical fibers held by the ferrules in each optical connector plug at the center of the optical adapter, the optical An optical connector plug of an optical connector structured to complete an optical connection of fibers, comprising: a ferrule that holds an optical fiber extending in the axial direction at the center; and a ferrule arranged coaxially with the ferrule on the outside of the ferrule. The optical adapter also includes a cylindrical member having a protrusion at its tip that fits into a notch formed in the optical adapter, and a wedge that is press-fitted between the cylindrical member and the ferrule and fixes both. An optical connector plug featuring:
JP10206888A 1988-04-25 1988-04-25 Optical connector plug Pending JPH01271712A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10206888A JPH01271712A (en) 1988-04-25 1988-04-25 Optical connector plug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10206888A JPH01271712A (en) 1988-04-25 1988-04-25 Optical connector plug

Publications (1)

Publication Number Publication Date
JPH01271712A true JPH01271712A (en) 1989-10-30

Family

ID=14317448

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10206888A Pending JPH01271712A (en) 1988-04-25 1988-04-25 Optical connector plug

Country Status (1)

Country Link
JP (1) JPH01271712A (en)

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