JPS6194010A - Production of optical connector - Google Patents

Production of optical connector

Info

Publication number
JPS6194010A
JPS6194010A JP21651684A JP21651684A JPS6194010A JP S6194010 A JPS6194010 A JP S6194010A JP 21651684 A JP21651684 A JP 21651684A JP 21651684 A JP21651684 A JP 21651684A JP S6194010 A JPS6194010 A JP S6194010A
Authority
JP
Japan
Prior art keywords
optical fiber
sleeve
mold
primary
covering
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
JP21651684A
Other languages
Japanese (ja)
Inventor
Takaaki Iso
磯　孝昭
Akihiro Otake
大竹　明博
Shigeru Tategami
舘上　滋
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.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co 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 Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP21651684A priority Critical patent/JPS6194010A/en
Publication of JPS6194010A publication Critical patent/JPS6194010A/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
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3865—Details of mounting fibres in ferrules; Assembly methods; Manufacture fabricated by using moulding techniques

Landscapes

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

Abstract

PURPOSE:To prevent the increase in the transmission loss of an optical fiber in a mold forming mold part by providing a sleeve having the inside diameter equal approximately and respectively to the outside diameters of a primary covering and secondary covering from an exposed bare optical fiber toward the secondary covering. CONSTITUTION:The secondary covering 2B at the end of the coated optical fiber 2 having the primary covering 2A and secondary covering 2B is removed for a prescribed length to expose the primary covering 2A. The top end part thereof is further removed by a prescribed length to expose the bare optical fiber 2C which is inserted into the sleeve 3. An adhesive agent is injected through an injecting hole 3C to fix the fiber 2 inserted into the sleeve 3 and the assembly is set in the mold forming mold 5 to mold simultaneously the sleeve and the fiber 2C by a molding resin, by which an optical connector is produced. The molded part is protected by the sleeve according to the above- mentioned method and therefore the bending of the optical fiber by the injection pressure in the stage of injecting the molding resin into the forming mold is prevented. The increase in the transmission loss of the optical fiber is thus obviated.

Description

【発明の詳細な説明】 （技術分野） 本発明は光通信に使用される光ファイバの端末に樹脂を
モールドして光コネクタを製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a method of manufacturing an optical connector by molding a resin onto the terminal of an optical fiber used for optical communication.

（従来技術とその問題点） 近年、モールド樹脂の改良、型製造技術の進歩により光
ファイバのような細径で、高精度な軸合せを必要とする
光ファイバのコネクタも精度よく樹脂モールドで製造で
きるように々った。例えば第５図はその一例で、被覆光
ファイバＡの端部の被覆Ｂを所定長除去して裸光ファイ
バＣを露出させ、これらを成形型にセットして樹脂モー
ルドを行い光コネクタＤを製造している。(Prior art and its problems) In recent years, improvements in molding resins and advancements in mold manufacturing technology have made it possible to manufacture connectors for optical fibers, which have small diameters like optical fibers and require highly accurate alignment, using resin molds with high precision. I tried to do it. For example, FIG. 5 shows an example of this, in which a predetermined length of the coating B at the end of the coated optical fiber A is removed to expose the bare optical fiber C, which is then set in a mold and resin molded to produce an optical connector D. are doing.

ところで、以上のような方法で作られた光コネクタは次
のような問題が生じる。By the way, the following problems arise with the optical connector made by the above method.

すなわち、モールド樹脂を成形型に注入する際の注入圧
による光ファイバの屈曲、あるいは樹脂注入後の温度降
下とともに生じる樹脂の収縮力の作用による光ファイバ
への側圧や、成形時の樹脂密度、粘度等の不均一に起因
する成形後の収縮の不均等による局部圧力によって生じ
るいわゆるマイクロベンデング等が生じ、これが光ファ
イバの伝送損失を増加させる原因と々ることかある。そ
のため第５図のように被覆Ｂを除去する際に一次被５ｖ
を出来るだけ残して裸光ファイバＣの部分を短い状態で
モールド成型しているがそれでも上記の問題点を解決で
きず充分な効果は得られない。In other words, bending of the optical fiber due to the injection pressure when molding resin is injected into the mold, lateral pressure on the optical fiber due to the shrinkage force of the resin that occurs as the temperature drops after resin injection, and resin density and viscosity during molding. So-called microbending occurs due to local pressure due to uneven shrinkage after molding due to non-uniformity such as micro bending, etc., and this can be a major cause of increasing transmission loss of the optical fiber. Therefore, when removing the coating B as shown in Figure 5, the primary coating
Although the bare optical fiber C is molded in a short state, leaving as much as possible, the above-mentioned problem cannot be solved and a sufficient effect cannot be obtained.

（問題点を解決するための手段と作用）本発明は上記の
問題点を解決するために一次および二次被覆を有する被
覆光ファイバの端部の二次被覆を所定長除去して一次被
覆を露出させ、更に一次被覆の端部を所定長除去して裸
光ファイバを露出させ１、露出した裸光ファイバから二
次被覆にかけて一次被覆および二次被覆の外径にそれぞ
れほぼ等しい内径を有するスリーブを設け、該スリーブ
を被覆光ファイバに固着したのち、被覆光ファイバ、ス
リーブおよび裸光ファイバをモールド成形型にセットし
、該成形型にモールド樹脂を注入して被覆光ファイバ、
スリーブおよび裸光ファイバを樹脂モールドで一体にし
て光コネクタ本体を成形することを特徴とする。(Means and operations for solving the problems) In order to solve the above-mentioned problems, the present invention removes a predetermined length of the secondary coating from the end of a coated optical fiber having a primary and secondary coating to remove the primary coating. The end portion of the primary coating is exposed, and a predetermined length of the end portion of the primary coating is removed to expose the bare optical fiber. 1. A sleeve having an inner diameter approximately equal to the outer diameter of the primary coating and the secondary coating, respectively, from the exposed bare optical fiber to the secondary coating. After fixing the sleeve to the coated optical fiber, the coated optical fiber, sleeve and bare optical fiber are set in a mold, and molding resin is injected into the mold to form the coated optical fiber,
The optical connector main body is formed by integrating the sleeve and the bare optical fiber with a resin mold.

このようにすると、モールド樹脂を成形型に注入する際
の注入圧による光ファイバの屈曲、樹脂注入後の温度降
下とともに生じる収縮力の作用による側圧、成形時の樹
脂密度、粘度等の不均一に起因する成形後の収縮の不均
等によるマイクロベンデング等がスリーブによって保護
されるものでモールド成型部で光ファイバの伝送損失を
増加させることがなくなる。This will prevent bending of the optical fiber due to the injection pressure when injecting the molding resin into the mold, lateral pressure due to the contraction force that occurs as the temperature drops after resin injection, and non-uniformity in resin density, viscosity, etc. during molding. Microbending and the like caused by uneven shrinkage after molding are protected by the sleeve, and the transmission loss of the optical fiber does not increase at the molded part.

（実施例） 以下、本発明の光コネクタの製造方法の一実施例を図面
を参照して詳細に説明する。(Example) Hereinafter, an example of the method for manufacturing an optical connector of the present invention will be described in detail with reference to the drawings.

第１図は本発明の方法によって製造された光コネクタの
断面図で、１はコネクタ本体、２は被覆光ファイバであ
る。被覆光ファイバ２は第２図（イ）、（ロ）に示すよ
うに一次被覆２Ａ、二次被覆２Ｂを有し、先端の二次被
覆２Ｂが所定長除去され、−次被覆２Ａが露出され、更
に、露出された一次被覆２人の先端の一次被覆が所定長
除去されて裸光ファイバ２Ｇが露出されている。そして
、裸光ファイバ２Ｃから二次被Ｈ２Ｂにかけてスリーブ
うが挿嵌されている。スリーブうけ例えば金属でできて
いて、その内径は、−次被覆２人の部分は一次被覆２Ａ
の外径にほぼ等しく、二次被覆２Ｂの部分は二次被覆２
Ｂの外径にほぼ等しい段差が設けられた状態に形成され
ている。このスリーブうけ接着剤３Ｄで一次被覆２人お
よび二次被覆２Ｂに固着されている。これら被覆光ファ
イバ２、スリーブう、裸光ファイバ２Ｇはモールド樹脂
４によって一体に形成されて光コネクタが構成されてい
る。FIG. 1 is a sectional view of an optical connector manufactured by the method of the present invention, where 1 is a connector body and 2 is a coated optical fiber. The coated optical fiber 2 has a primary coating 2A and a secondary coating 2B as shown in FIGS. Furthermore, a predetermined length of the primary coating at the tips of the two exposed primary coatings is removed to expose the bare optical fiber 2G. A sleeve is inserted from the bare optical fiber 2C to the secondary cover H2B. The sleeve holder is made of metal, for example, and its inner diameter is - The two parts of the secondary coating are the primary coating 2A
The outer diameter of the secondary coating 2B is approximately equal to the outer diameter of the secondary coating 2B.
It is formed with a step approximately equal to the outer diameter of B. The sleeve is fixed to the two primary coatings and the secondary coating 2B with adhesive 3D. These coated optical fiber 2, sleeve, and bare optical fiber 2G are integrally formed with molded resin 4 to constitute an optical connector.

こめような光コネクタは以下のような方法で製造される
。This type of optical connector is manufactured by the following method.

先ず、第２図（イ）に示すように一次被覆２Ａに７次被
覆２Ｂを有する被覆光ファイバ２−の端部の二次被覆２
Ｂを所定長除去し、−次被覆２人を露出する。次いで露
出した一次被覆２人の先端部分を所定長除去して裸光フ
ァイバ２Ｃを露出する。裸光ファイバ２Ｃおよび一次被
覆２人が露出した被覆光ファイバ２の端末を第う図に示
すスリーブうに挿入する。スリーブ５の内孔は一方が太
径孔うＡ１他方が小径孔３Ｂとカっでいて、太径孔３Ａ
は二次被覆２Ｂの外径にほぼ等しく、小径孔３Ｂは一次
被覆２人の外径にほぼ等しい孔径となっている。そして
太径孔３Ａの中間部には接着剤注入孔３Ｇが設けられて
いて、この注入孔３Ｃから接着剤３Ｄを注入してスリー
ブう内に挿入された被覆光ファイバ２を接着剤３Ｄで固
着する。First, as shown in FIG. 2(a), the secondary coating 2 is applied to the end of the coated optical fiber 2-, which has the primary coating 2A and the seventh coating 2B.
A predetermined length of B is removed to expose the next two layers. Next, a predetermined length of the exposed end portions of the two primary coatings is removed to expose the bare optical fiber 2C. The ends of the bare optical fiber 2C and the coated optical fiber 2 with the two primary coatings exposed are inserted into the sleeve shown in FIG. The inner hole of the sleeve 5 has a large diameter hole A on one side, a small diameter hole 3B on the other side, and a large diameter hole 3A on the other side.
is approximately equal to the outer diameter of the secondary covering 2B, and the small diameter hole 3B has a hole diameter approximately equal to the outer diameter of the two primary coverings. An adhesive injection hole 3G is provided in the middle of the large diameter hole 3A, and an adhesive 3D is injected from this injection hole 3C to fix the coated optical fiber 2 inserted into the sleeve with the adhesive 3D. do.

スリーブ５を固着したこの被覆光ファイバ２の端末を第
４図に示すようにモールド成形型５にセントして二次被
覆２Ｂ１スリーブうおよびスリーブうから露出している
裸光ファイバ２Ｃをモールド樹脂で一括してモールド成
形して光コネクタを製造する。第４図において、５Ａは
型〈ぼ５Ｂはモールド樹脂注入孔である。As shown in FIG. 4, the end of the coated optical fiber 2 with the sleeve 5 fixed thereto is inserted into the molding die 5, and the secondary coating 2B1 and the bare optical fiber 2C exposed from the sleeve are wrapped with molding resin. Then, the optical connector is manufactured by molding. In FIG. 4, 5A is a mold and 5B is a mold resin injection hole.

（発明の効果） このようにして製造された光コネクタはモールドされる
部分がスリーブによって保護されているので、モールド
樹脂を成形型に注入する際の注入圧による光ファイバの
屈曲、樹脂注入後の温度降下とともに生じる収縮力の作
用による側圧、成形時の樹脂密度、粘度等の不均一に起
因する成形後の収縮の不均等によるマイクロベンデング
等が防止されるので、光ファイバの伝送損失を増加させ
ることか々くなる。(Effects of the invention) In the optical connector manufactured in this way, the molded part is protected by a sleeve, so the bending of the optical fiber due to the injection pressure when injecting the molding resin into the mold, and the bending of the optical fiber after resin injection. This prevents lateral pressure due to the effect of shrinkage force that occurs as the temperature drops, and microbending due to uneven shrinkage after molding due to uneven resin density, viscosity, etc. during molding, increasing optical fiber transmission loss. It becomes difficult to do so.

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

第１図は本発明の方法により製造された光コネクタの一
実施例を示す縦断面図、第２図（イ）、（ロ）は同実施
例に使用される光ファイバの縦断面図と横断面図、第５
図は同実施例に使用されるスリーブの縦断面図、第４図
は本発明の方法を実施するために端末をモールド成形型
にセットした状態を示す断面図、第５図は従来の方法に
よって製造された光コネクタの縦断面図である。 １・・・・・・コネクタ本体、２・・・・・・彼覆光フ
ァイバ、２人・・・・−次被覆、２Ｂ・・・・・・二次
被覆、２Ｃ・・・・・・裸光ファイバ、ろ・・・・・・
スリーブ、３Ｄ・・・・・・接着剤、４・・・・・・モ
ールド樹脂、５・・・・・・モールド成形型 第１図 第２図（イ） 第２図（０） 第３図 ３４　　　　　　　　３ｔｊFIG. 1 is a vertical cross-sectional view showing an embodiment of an optical connector manufactured by the method of the present invention, and FIGS. Front view, No. 5
The figure is a longitudinal sectional view of the sleeve used in the same embodiment, FIG. 4 is a sectional view showing the terminal set in a mold for carrying out the method of the present invention, and FIG. 5 is a sectional view of the sleeve used in the conventional method. FIG. 3 is a longitudinal cross-sectional view of the manufactured optical connector. 1...Connector body, 2...Head-covered optical fiber, 2 people...-Secondary coating, 2B...Secondary coating, 2C... Bare optical fiber...
Sleeve, 3D... Adhesive, 4... Mold resin, 5... Mold Figure 1 Figure 2 (A) Figure 2 (0) Figure 3 34 3tj

Claims (1)

【特許請求の範囲】[Claims] 一次および二次被覆を有する被覆光ファイバの端部の二
次被覆を所定長除去して一次被覆を露出させ、更に一次
被覆の端部を所定長除去して裸光ファイバを露出させ、
露出した裸光ファイバから二次被覆にかけて一次被覆お
よび二次被覆の外径にそれぞれほぼ等しい内径を有する
スリーブを設け、該スリーブを被覆光ファイバに固着し
たのち、被覆光ファイバ、スリーブおよび裸光ファイバ
をモールド成形型にセットし、該成形型にモールド樹脂
を注入して被覆光ファイバ、スリーブおよび裸光ファイ
バを樹脂モールドで一体にして光コネクタ本体を成形す
ることを特徴とする光コネクタの製造方法。removing a predetermined length of the secondary coating from the end of a coated optical fiber having primary and secondary coatings to expose the primary coating; further removing a predetermined length of the end of the primary coating to expose the bare optical fiber;
A sleeve having an inner diameter approximately equal to the outer diameter of the primary coating and the secondary coating is provided from the exposed bare optical fiber to the secondary coating, and the sleeve is fixed to the coated optical fiber, and then the coated optical fiber, the sleeve and the bare optical fiber are bonded. A method for manufacturing an optical connector, comprising: setting the optical fiber in a mold, injecting mold resin into the mold, and integrating the coated optical fiber, the sleeve, and the bare optical fiber with a resin mold to form an optical connector main body. .
JP21651684A 1984-10-16 1984-10-16 Production of optical connector Pending JPS6194010A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21651684A JPS6194010A (en) 1984-10-16 1984-10-16 Production of optical connector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21651684A JPS6194010A (en) 1984-10-16 1984-10-16 Production of optical connector

Publications (1)

Publication Number Publication Date
JPS6194010A true JPS6194010A (en) 1986-05-12

Family

ID=16689657

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21651684A Pending JPS6194010A (en) 1984-10-16 1984-10-16 Production of optical connector

Country Status (1)

Country Link
JP (1) JPS6194010A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0329908A (en) * 1989-06-28 1991-02-07 Hitachi Cable Ltd Optical fiber with optical connector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0329908A (en) * 1989-06-28 1991-02-07 Hitachi Cable Ltd Optical fiber with optical connector

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