JPS61185704A - Connecting method of optical fiber - Google Patents

Connecting method of optical fiber

Info

Publication number
JPS61185704A
JPS61185704A JP2750285A JP2750285A JPS61185704A JP S61185704 A JPS61185704 A JP S61185704A JP 2750285 A JP2750285 A JP 2750285A JP 2750285 A JP2750285 A JP 2750285A JP S61185704 A JPS61185704 A JP S61185704A
Authority
JP
Japan
Prior art keywords
optical fiber
optical fibers
fixing
fixing jig
connection
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.)
Granted
Application number
JP2750285A
Other languages
Japanese (ja)
Other versions
JPH0550723B2 (en
Inventor
Keiji Osaka
啓司 大阪
Yuichi Usui
臼井　裕一
Akira Yanagi
公 柳
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries 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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP2750285A priority Critical patent/JPS61185704A/en
Publication of JPS61185704A publication Critical patent/JPS61185704A/en
Publication of JPH0550723B2 publication Critical patent/JPH0550723B2/ja
Granted legal-status Critical Current

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Abstract

PURPOSE:To connect optical fibers without breaking conductors by fixing both end faces of terminal parts of conductors to be connected by a specific fixing jig and reinforcing the connection part with a reinforcing thermally contractible tube while fixing them as they are after connection and releasing them from fixing. CONSTITUTION:Fixing jigs 1 and 1' which hold terminal parts of optical fiber conductors 10a and 10b to be connected linearly throughout a certain length are set, and the gap between end faces of optical fibers 10a and 10b at the connection time is made uniform. One fixing jig 1' is provided with a conductor clamping upper cover 3 divided into plural pieces, and a reinforcing thermally contractible tube 12 pierced by the conductor 10a is stored in the fixing jig 1'; and when optical fibers 10a and 10b are connected completely, the reinforcing thermally contractible tube 12 is moved to a connection part 11 along the optical fiber 10a without opening one side for example, an upper cover 31 of the clamping upper cover of the fixing jig 1' at least, and the optical fiber connection part 11 is reinforced by this tube 12, and thereafter, all clamping upper covers 3 and 3 of fixing jigs 1 and 1' are opened. By this operation, an excess external force is not applied to weak optical fibers, and optical fibers are connected without breaks of them.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は光ファイバの永久融着接続に関するものであり
、特に光ファイバを複数本一体化した多心光ファイバ、
被覆に光ファイバの拘束力の小さい紫外線硬化型樹脂を
用いた光ファイバ、あるいは保護パイプ内に収納された
光ファイバの接続に好適な接続方法に関するものである
。Detailed Description of the Invention (Industrial Application Field) The present invention relates to permanent fusion splicing of optical fibers, and in particular to multi-core optical fibers in which a plurality of optical fibers are integrated.
The present invention relates to a connection method suitable for connecting optical fibers whose coating uses an ultraviolet curing resin that has a small binding force on the optical fibers, or optical fibers housed in protective pipes.

（従来技術及び解決しようとする問題）一般に多心光フ
ァイバ心線の融着接続は一括して行なうために、■各光
ファイバの端面が鏡面に切断されていること、■すべて
の光ファイバの端面位置が揃っていることが必要で、通
常１００μｍ以上の不揃い量があると融着接続が不可能
であるし、相対向する光ファイバの端面間隔にバラツキ
があると接続損失が一定にならず高精度の接続ができな
かった。(Prior art and problem to be solved) In general, since multi-core optical fibers are fusion spliced all at once, the end face of each optical fiber is cut into a mirror surface, and ■ all optical fibers are It is necessary that the end faces be aligned; if there is an amount of misalignment of 100 μm or more, fusion splicing is usually impossible, and if there is variation in the distance between the end faces of opposing optical fibers, the splice loss will not be constant. A high-precision connection was not possible.

しかし、従来複数本の光ファイバを一括して切り揃えよ
うとしても、各光ファイバに加わる外力等によりそれぞ
れの光ファイバが長手方向に勝手に移動するため相互間
にずれ現象が生じ正確に端面位置を揃えることができな
かった。これがため従来は融着接続直前に各光ファイバ
の端面を整列板に突き当てることにより各光ファイバの
突き出し量を揃え、しかる後に一括接続する方法が用い
られていた。しかしこの方法は各光ファイバの端面を整
列板に突き当てて揃えるため、各光ファイバにそれぞれ
異なった曲げ応力を強いることになり、光ファイバの破
断確立が高く、安全な接続方法とはいい難いものであっ
た。However, conventionally, even if you try to trim multiple optical fibers at once, each optical fiber moves freely in the longitudinal direction due to external force applied to each optical fiber, resulting in misalignment between them, making it difficult to accurately position the end face. I couldn't get it all together. For this reason, conventionally, a method has been used in which the end faces of each optical fiber are butted against an alignment plate immediately before fusion splicing to equalize the amount of protrusion of each optical fiber, and then the fibers are spliced all at once. However, since this method aligns the end faces of each optical fiber against the alignment plate, different bending stress is imposed on each optical fiber, and the probability of optical fiber breakage is high, making it difficult to call it a safe connection method. It was something.

（問題点を解決するための手段） 本発明は上述の問題点を解消した新規な光ファイバの接
続方法を提供するもので、その特徴は、接続しようとす
る光ファイバ心線のそれぞれの端末部に該端末部を一定
長にわたって直線状に保持する固定治具を装着して接続
時の光ファイバ端面間隔を揃え、上記固定治具の一方は
複数に分割された光ファイバ心線クランプ用上蓋を具え
内部に一方の光ファイバ心線を挿通した補強用熱収縮チ
ューブが収納されており、光ファイバの接続完了時に上
記固定用治具のクランプ用上蓋の少くとも一つを解放す
ることなく補強用熱収縮チューブを光ファイバに沿って
接続部上まで移動させて光ファイバ接続部を補強した後
、固定治具のすべてのクランプ用上蓋を解放することに
ある。(Means for Solving the Problems) The present invention provides a novel optical fiber connection method that solves the above-mentioned problems. A fixing jig that holds the end portion in a straight line over a certain length is attached to the end to align the distance between the optical fiber end faces during connection, and one of the fixing jig is equipped with a top cover for clamping the optical fiber core divided into a plurality of parts. A reinforcing heat-shrinkable tube with one optical fiber core inserted through it is housed inside the holder, and when the optical fiber connection is completed, the reinforcement can be used without releasing at least one of the clamping lids of the fixing jig. After reinforcing the optical fiber connection by moving the heat shrink tube along the optical fiber to the top of the connection, all clamping top covers of the fixing jig are released.

（実施例） 第１図は本発明の接続方法において光ファイバ心線端末
部に装着する固定治具の一例の説明図である。同図（イ
）は固定治具（１）の基本構成の斜視図で、長手方向に
光ファイバ心線の収納溝（Φを有する基板■と、該基板
■と蝶番（図示せず）等により開閉可能に設けたクラン
プ用上蓋（３）より成っている。(Example) FIG. 1 is an explanatory diagram of an example of a fixing jig to be attached to an optical fiber core end portion in the connection method of the present invention. Figure (A) is a perspective view of the basic structure of the fixing jig (1), in which there is a substrate (■) having a storage groove (Φ) for the optical fiber in the longitudinal direction, and a hinge (not shown) between the substrate (■) and the like. It consists of a clamping top cover (3) that can be opened and closed.

上記基板■及びクランプ用上蓋（３）はいずれも合成樹
脂あるいは金属材料で構成されており、合成樹脂の場合
は例えば基板■内に永久磁石を埋込み他方上Ｍ（３）に
は磁性金属板を取付けることにより光ファイバ心線を収
納溝（４）に収納したとき上記永久磁石により上蓋（３
）と基板■が閉じ合わされ、内部の光ファイバ心線をし
っかりと固定する。又金属材料で構成するときも非磁性
金属板を用いて合成樹脂の場合と同様に形成してもよい
が、例えば基板■は永久磁石を一体に取付けたアルミニ
ウムのような非磁性金属板とし、上蓋（３）は軟鋼のよ
うな磁性金属板を用い上述のように永久磁石の作用によ
り基板■と上蓋（３）を閉じ合わせ、内部の光ファイバ
心線をしっかりと固定するようにしてもよい。Both the substrate (■) and the clamping top cover (3) are made of synthetic resin or metal, and in the case of synthetic resin, for example, a permanent magnet is embedded in the substrate (■) and a magnetic metal plate is placed in the upper M (3). By attaching the optical fiber, when the optical fiber is stored in the storage groove (4), the permanent magnet will cause the upper cover (3) to close.
) and the board ■ are closed together, firmly fixing the internal optical fiber core. Also, when it is made of metal material, it may be formed using a non-magnetic metal plate in the same way as in the case of synthetic resin. The upper cover (3) may be made of a magnetic metal plate such as mild steel, and as described above, the substrate (■) and the upper cover (3) may be closed together by the action of a permanent magnet to firmly fix the optical fiber core inside. .

又上蓋（３）は図示では１枚ものであるが、複数に分割
してもよく、さらに又第３図に示すように中央部に間隔
（８）をおいた２枚の上蓋（３１）（３２）で構成し、
中央部の間隔Ｂ）を接続装置ステージへのクランプ部と
してもよい。In addition, although the upper cover (3) is shown as one piece, it may be divided into a plurality of parts, and as shown in FIG. 32),
The central spacing B) may be used as a clamping portion to the connecting device stage.

なお、同図（ロ）に示すように収納溝（４の内周面に摩
擦力の大きいライニング材■を設けるか、同図（ハ）に
収納溝（４）の部分縦断面を示すように収納溝■の底面
に凹凸（６）を設ける等して光ファイバの拘束力を増大
するようにしてもよい。In addition, as shown in the same figure (b), a lining material (■) with a large frictional force is provided on the inner peripheral surface of the storage groove (4), or as shown in the partial longitudinal section of the storage groove (4) in the same figure (c). The binding force of the optical fiber may be increased by providing unevenness (6) on the bottom surface of the storage groove (2).

第２図は本発明の接続方法に用いる固定治具（Ｉ′）の
今一つの例を示すもので、基板■は第１図に示すような
光ファイバ心線の収納溝（Φの他に、あらかじめ光ファ
イバ心線に挿通されており、光ファイバの接続後この接
続部を補強するための補強用熱収縮チューブの収納溝■
が設けられている。又クランプ用の上蓋（３）は例えば
２枚の板（３１）（３２）に分割されていて、光ファイ
バの接続後に左側の板（３１）は閉じて光ファイバ心線
をクランプした状態で右側の板（３２）を開放して補強
用熱収縮チューブを接続部上に移動可能になっている。Figure 2 shows another example of the fixing jig (I') used in the connection method of the present invention. Storage groove for reinforcing heat shrink tube that is inserted into the optical fiber core in advance and used to reinforce this connection after connecting the optical fiber.■
is provided. The upper lid (3) for clamping is divided into, for example, two plates (31) and (32), and after connecting the optical fiber, the left plate (31) is closed and the right side plate is closed with the optical fiber cored wire clamped. The reinforcing heat shrink tube can be moved onto the connecting part by opening the plate (32).

この場合上蓋（３）の２枚の板（３１）（３２）は間隔
をおかず単に分割しただけでもよいが、図に示すように
間隔■をおいてこの部分を固定治具（１′）を接続装置
ステージへ取付ける際のクランプ代にしてもよい。In this case, the two plates (31) and (32) of the top cover (3) may be simply separated without a gap between them, but as shown in the figure, the two plates (31) and (32) may be separated with a gap (■) and the fixing jig (1') is used to separate these parts. It may also be used as a clamping fee when attaching the connecting device to the stage.

第３図は光ファイバ接続後の状態を示す上面図（同図イ
）及び側面図（同図口）である。図面において、■は接
続装置ステージ、（＋０６Ｌ）及び（＋０６）は接続す
べき光ファイバ心線で、それぞれの端末部には固定治具
（＋）（１’）が装着されている。一方の光ファイバ心
線（１（１６）には第１図に示す固定治具（１）が、他
方の光ファイバ心線（＋０４）には内部に補強用熱収縮
チューブＧＤを収納した固定治具（１′）が装着されて
いる。ＯＤは光ファイバの接続部を示し、この接続部Ｏ
Ｄ上には固定治具（１′）の上蓋（３）の右側の板（３
２）を解放して取出した補強用熱収縮チューブ（１２’
）が位置している。FIG. 3 is a top view (FIG. 3) and a side view (FIG. 3) showing the state after the optical fibers are connected. In the drawing, ■ is a splicing device stage, (+06L) and (+06) are optical fiber cores to be spliced, and fixing jigs (+) (1') are attached to their respective terminal parts. One optical fiber core (1 (16)) is equipped with a fixing jig (1) shown in Figure 1, and the other optical fiber core (+04) is equipped with a fixing jig containing a reinforcing heat shrink tube GD inside. The fitting (1') is attached. OD indicates the connection part of the optical fiber, and this connection part O
On D is the plate (3) on the right side of the top cover (3) of the fixing jig (1').
2) and removed the reinforcing heat shrink tube (12'
) is located.

次に本発明の接続方法の作業手順を第４図に従って説明
する。まず同図（イ）に示すように接続すべき光ファイ
バ心線の一方（１０＾）に補強用熱収縮チューブ０７Ｊ
を収納した固定治具（＋’）　（第２図参照）を、他方
の光ファイバ心線（１０６）に第１図の如き固定治具（
１）を装着した後、接続装置ステージ（９）にセットし
光ファイバの接続ＧＤを行なう。次いで同図（ロ）のよ
うに固定治具（！′）の接続部ＧＯ側の上蓋（３２）を
解放し内部に収納されている補強用熱収縮チューブＯｂ
を移動させて接続部ＧＤに位置させ、加熱装置ｑ）によ
り上記補強用熱収縮チューブＱ’ｌ）を加熱し収縮させ
る。この際固定治具（１′）の一方の上蓋（３１）は解
放されることなく、シっかりと光ファイバ心線（１０＾
）を固定している。しかる後同図（ハ）のようにすべて
の固定装置（１）（１’）の上蓋（３）を解放し接続さ
れ補強された光ファイバ心線を取り出す。Next, the working procedure of the connection method of the present invention will be explained with reference to FIG. First, as shown in the same figure (a), a reinforcing heat shrink tube 07J is attached to one side (10^) of the optical fiber core wire to be connected.
Attach the fixing jig (+') (see Figure 2) containing the
1), set it on the connecting device stage (9) and perform the optical fiber connection GD. Next, as shown in the same figure (b), open the upper cover (32) on the connection part GO side of the fixing jig (!') and remove the reinforcing heat shrink tube Ob stored inside.
is moved and positioned at the connection part GD, and the reinforcing heat shrink tube Q'l) is heated and shrunk by the heating device q). At this time, the upper cover (31) on one side of the fixing jig (1') is not released and the optical fiber core (10^) is firmly attached.
) is fixed. Thereafter, as shown in FIG. 3(C), the upper covers (3) of all the fixing devices (1) (1') are released and the connected and reinforced optical fiber cores are taken out.

なお、光ファイバ心線（＋ｏ６Ｌ）（＋ｏＡ　）がルー
スチューブ０４１内に収納されている場合は、第５図に
示すように上蓋（３）が複数個に分割された固定治具（
１）（１’）を用い、少くとも上蓋（３）の一つの板（
３２）が上記チューブ０４１をクランプする必要がある
。In addition, when the optical fiber core wire (+o6L) (+oA) is stored in the loose tube 041, the upper cover (3) is divided into a plurality of fixing jigs (
1) (1'), at least one plate (3) of the upper lid (3)
32) is required to clamp the tube 041.

（検討例１） 基板に永久磁石を埋込んだアルミニウム板を用い、上蓋
は２枚分割形式の軟鋼板を用い両者を永久磁石で閉じ合
せた固定治具を端末部に装着した光ファイバ外径１２５
μｍの被覆にナイロンを用いた５心入りテープファイバ
ユニット（幅Ｉ　Ｊｗ■×厚さ０．４５ｍ５）を融着接
続し、一方の固定治具に収納されていた熱収縮チューブ
を補強したところ、光ファイバの移動による端面の不揃
い合は１０μｍ以下と小さく、各光ファイバの接続損失
はいずれも０００１ｄＢ以下と良好であった。(Study example 1) An aluminum plate with a permanent magnet embedded in the substrate, a two-piece mild steel plate for the upper cover, and a fixing jig that closes both parts with a permanent magnet is attached to the terminal part of an optical fiber outer diameter. 125
When a 5-fiber tape fiber unit (width I Jw x thickness 0.45 m5) using nylon for μm coating was fusion spliced and the heat shrink tube housed in one of the fixing jigs was reinforced, The misalignment of the end faces due to the movement of the optical fibers was as small as 10 μm or less, and the connection loss of each optical fiber was good as 0001 dB or less.

（検討例２） 基板、上蓋とも高分子樹脂製のものを用い、紫外線硬化
型樹脂の被覆層を具えアルミニウムチューブに収納した
単心光ファイバ心線を接続し熱収縮チューブで補強した
ところ、接続損失は０．０ＩｄＢ以下と良好であった。(Study example 2) Both the substrate and the top cover were made of polymer resin, and when a single optical fiber coated with an ultraviolet curable resin coating layer and housed in an aluminum tube was connected and reinforced with a heat shrink tube, the connection was successful. The loss was good at 0.0 IdB or less.

（発明の効果） 本発明の光ファイバ接続方法によれば、固定治具を装着
した状態で光ファイバの端面処理、融着接続を行なうの
で、端面間隔の揃った接続ができ、極めて低損失かつ均
質な接続特性が得られる。又光ファイバの融着接続後に
固定治具の複数のクランプ用上蓋のうち少くともその１
枚を解放することなく、固定治具内に収納されている補
強用部材を用いて補強するので、余分な外力が強度の弱
い光ファイバに加わることがなく、光ファイバの破損を
防止することができる。(Effects of the Invention) According to the optical fiber splicing method of the present invention, the end face treatment and fusion splicing of the optical fiber are performed with the fixing jig attached, so splicing with uniform end face spacing can be achieved with extremely low loss and Homogeneous connection characteristics can be obtained. Also, after fusion splicing the optical fiber, at least one of the plurality of clamping top covers of the fixing jig is
Since the reinforcing member stored in the fixing jig is used to reinforce the fiber without releasing the fiber, extra external force is not applied to the weak optical fiber, and damage to the optical fiber can be prevented. can.

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

第１図及び第２図は本発明の接続方法に用いる固定治具
の説明図、第３図は光ファイバの接続状態を示す上面図
（同図イ）及び側面図（同図口）、第４図は本発明の接
続方法の作業手順の説明図を示す。 １．１′・・・固定治具、２・・・基板、３・・・上蓋
、４・・・光ファイバ心線収納溝、７・・・補強部材収
納溝、９・・・接続装置ステージ、＋ｏ６Ｌ、＋ｏＡ・
・・光ファイバ６腺、１１・・・光ファイバ接続部、＋
２・・・補強用熱収縮チューブ。1 and 2 are explanatory diagrams of a fixing jig used in the connection method of the present invention, and FIG. 3 is a top view (A) and a side view (A) and a side view (A) and FIG. 4 shows an explanatory diagram of the working procedure of the connection method of the present invention. 1.1'... Fixing jig, 2... Board, 3... Top cover, 4... Optical fiber core storage groove, 7... Reinforcement member storage groove, 9... Connection device stage , +o6L, +oA・
...Optical fiber 6 glands, 11...Optical fiber connection part, +
2...Heat shrink tube for reinforcement.

Claims (3)

【特許請求の範囲】[Claims] （１）接続しようとする光ファイバ心線のそれぞれの端
末部に該端末部を一定長にわたって直線状に保持する固
定治具を装着して接続時の光ファイバ端面間隔を揃え、
上記固定治具の一方は複数に分割された光ファイバ心線
クランプ用上蓋を具え内部に一方の光ファイバ心線を挿
通した補強用熱収縮チューブが収納されており、光ファ
イバの接続完了時に上記固定治具のクランプ用上蓋の少
くとも一つを解放することなく補強用熱収縮チューブを
光ファイバに沿って接続部上まで移動させて光ファイバ
接続部を補強した後、固定治具のすべてのクランプ用上
蓋を解放することを特徴とする光ファイバの接続方法。(1) Attach a fixing jig to each end of the optical fiber core wire to be connected to hold the end in a straight line over a certain length, and align the distance between the optical fiber end faces at the time of connection;
One side of the fixing jig is equipped with a top cover for clamping the optical fibers divided into multiple parts, and a reinforcing heat-shrinkable tube through which one of the optical fibers is inserted is housed inside. After reinforcing the optical fiber connection by moving the reinforcing heat shrink tube along the optical fiber to the top of the connection without releasing at least one of the clamping tops of the fixture, remove all of the An optical fiber connection method characterized by releasing a clamping top cover. （２）光ファイバ心線の被覆部が紫外線硬化型樹脂で形
成されていることを特徴とする特許請求の範囲第１項記
載の光ファイバの接続方法。(2) The method for connecting optical fibers according to claim 1, wherein the coating portion of the optical fiber core wire is formed of an ultraviolet curable resin. （３）光ファイバ心線が保護パイプに収納されており、
該保護パイプと光ファイバ心線のいずれをも固定治具に
クランプすることを特徴とする特許請求の範囲第１項記
載の光ファイバの接続方法。(3) The optical fiber core is housed in a protective pipe,
2. The method for connecting optical fibers according to claim 1, wherein both the protection pipe and the optical fiber core are clamped to a fixing jig.
JP2750285A 1985-02-13 1985-02-13 Connecting method of optical fiber Granted JPS61185704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2750285A JPS61185704A (en) 1985-02-13 1985-02-13 Connecting method of optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2750285A JPS61185704A (en) 1985-02-13 1985-02-13 Connecting method of optical fiber

Publications (2)

Publication Number Publication Date
JPS61185704A true JPS61185704A (en) 1986-08-19
JPH0550723B2 JPH0550723B2 (en) 1993-07-29

Family

ID=12222916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2750285A Granted JPS61185704A (en) 1985-02-13 1985-02-13 Connecting method of optical fiber

Country Status (1)

Country Link
JP (1) JPS61185704A (en)

Also Published As

Publication number Publication date
JPH0550723B2 (en) 1993-07-29

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