JPS63194208A - Batch welding and connecting method for optical fiber - Google Patents
Batch welding and connecting method for optical fiberInfo
- Publication number
- JPS63194208A JPS63194208A JP62026778A JP2677887A JPS63194208A JP S63194208 A JPS63194208 A JP S63194208A JP 62026778 A JP62026778 A JP 62026778A JP 2677887 A JP2677887 A JP 2677887A JP S63194208 A JPS63194208 A JP S63194208A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- optical fibers
- terminal
- group
- fiber core
- 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
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims description 17
- 238000003466 welding Methods 0.000 title abstract 3
- 238000012545 processing Methods 0.000 claims abstract description 3
- 238000007526 fusion splicing Methods 0.000 claims description 17
- 230000004927 fusion Effects 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000012805 post-processing Methods 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 230000002787 reinforcement Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 239000004831 Hot glue Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 235000002020 sage Nutrition 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 補強する方法に関するものである。[Detailed description of the invention] (Industrial application field) It concerns a method of reinforcement.
（従来技術及び解決しようとする問題点）従来、光ファ
イバの永久接続には気中放電の熱で溶融接続する融着接
続法が広く適用されている。(Prior Art and Problems to Be Solved) Conventionally, the fusion splicing method, which involves melting and splicing using the heat of air discharge, has been widely used to permanently connect optical fibers.
又最近では複数心の光ファイバを平面状に配列しこれら
に共通の被覆層を設けて一体化した多心光ファイバテー
プ心線が実用化されつつあり、このため、上記多心光フ
ァイバテープ心線同志の一括接続技術も開発されつつあ
る。In addition, recently, multi-core optical fiber tape cores in which a plurality of optical fibers are arranged in a planar manner and integrated by providing a common coating layer have been put into practical use. Techniques for connecting wires together at once are also being developed.
一方、光ファイバケーブルとしては、以上のような単心
光ファイバ心線の多数心をケーブル化したものと、多心
光ファイバテープ心線の所要心をまとめてケーブル化し
たものが存在する。On the other hand, as optical fiber cables, there are two types: one in which multiple cores of a single optical fiber as described above are made into a cable, and one in which the required cores of a multi-core optical fiber tape are made into a cable.
このような状況のもとで、■前記単心光ファイバ心線の
集団同志を一括融着接続する技術、■単心光ファイバ心
線の集団と多心光ファイバテープ心線を一括融着接続す
る技術については、これまで検討されていなかった。Under these circumstances, we developed (1) a technology for collectively fusion splicing a group of single-core optical fibers, and (2) a technology for collectively fusion-splicing a group of single-core optical fibers and a multi-core optical fiber ribbon. The technology to do this has not been considered so far.
第８図は、従来の里心光ファイバ心線の多数心をケーブ
ル化した光ファイバケーブルの接続技術の一例の説明図
で、同図（イ）は接続伏態図、同図（ロ）は光ファイバ
接続部の横断面図である。Fig. 8 is an explanatory diagram of an example of the connection technology of an optical fiber cable in which many cores of conventional Satishin optical fiber cores are made into a cable. FIG. 3 is a cross-sectional view of an optical fiber connection section.
部付近において個々の光ファイバ心線（Ｂ）に分けられ
、それぞれの光ファイバ心線（Ｂ）の光ファイバ（Ｃ）
は各別に融着接続（２）され、それぞれの接続部（２）
は、各別に例えば内部に補強部（３りを収納し、内面に
ホットメルト接着剤（３２）をもった熱収縮チューブ（
３０）等の補強材によって補強される。The optical fibers (C) of each optical fiber core (B) are divided into individual optical fiber cores (B) near the section.
are fusion spliced (2) separately, and each joint (2)
For example, a heat shrink tube (32) containing a reinforcing part (32) inside and a hot melt adhesive (32) on the inner surface is used.
30) and other reinforcing materials.
しかし、上述のような接続方法によれば、多数の光ファ
イバを各別に接続するために、多大の手間と時間を必要
とすると共に、接続部寸法が大きくなるという問題点が
存在する。However, according to the above-mentioned connection method, there are problems in that it requires a great deal of effort and time to individually connect a large number of optical fibers, and the size of the connection portion becomes large.
（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、接続の迅速化と接続部
寸法の小型化を可能とし、さらには多心光ファイバテー
プ心線との接続をも可能とした光ファイバの一括融着接
続方法を提供するもので、その特徴は、個々に独立した
光ファイバ心線の複数本を平面状に配列し端末固定具で
クランプして光ファイバ心線群となした後、一括して上
記光ファイバ心線群の被覆除去及び露出した光ファイバ
の端部切断を行ない、しかる後一括して上記光ファイバ
の融着接続及び接続部の補強を行なうことにある。(Means for Solving the Problems) The present invention solves the above-mentioned problems, makes it possible to speed up the connection, reduce the size of the connection part, and further enables connection with multi-core optical fiber tape. This method provides a method for batch fusion splicing of optical fibers that enables batch fusion splicing of optical fibers.The feature is that a plurality of individual optical fiber cores are arranged in a plane and clamped with terminal fixtures to form a group of optical fiber cores. After that, the coating of the optical fiber core group is removed and the ends of the exposed optical fibers are cut, and then the optical fibers are fusion spliced and the joints are reinforced. be.
られた多数心の光ファイバ接続部の説明図、第２図（イ
）〜（ハ）は多数心の光ファイバ心線を端末固定具でク
ランプした状態の横断面図、第３図は端末固定具にクラ
ンプした光ファイバ心線群の被覆を一括除去する説明図
、第４図は被覆を除去して露出した光ファイバ詳の端末
部を一括切断する説明図、第５図は融着接続機にセット
した状態の説明図、第６図（イ）及び第７図（イ）はい
ずれも接続部補強の説明図、それぞれ（ロ）は補強部の
横断面図である。Figures 2 (a) to (c) are cross-sectional views of the multi-core optical fibers clamped with the terminal fixing device, and Figure 3 is the terminal fixing. Fig. 4 is an explanatory diagram showing how to remove the coating from a group of optical fibers clamped to a tool, Fig. 4 is an explanatory diagram showing how to remove the coating and cut the exposed end portions of the optical fibers in a batch, and Fig. 5 is a fusion splicer. 6(A) and 7(A) are both explanatory views of the reinforcement of the connecting portion, and (B) are cross-sectional views of the reinforcing portion.
次に本発明の一括融着接続方法の作業手順を順を追って
説明する。Next, the working procedure of the batch fusion splicing method of the present invention will be explained step by step.
■個々に独立した光ファイバ心線（Ｂ）の複数本を平面
状に配列し、その端末部付近を端末固定具（１）でクラ
ンプする。(2) A plurality of individually independent optical fiber cores (B) are arranged in a planar manner, and the vicinity of their terminal parts are clamped with terminal fixtures (1).
内面に接着剤ｆｆｉ （＋４１を設けた上蓋（Ｉ３）を
重ね合せたもの（第２図イ）や、上面に平面状に配列さ
れた複数本の光ファイバ心ｔ！ａ （Ｂ）を一括収容す
る溝（１５）を仔する基台（１））上に、内面に接佇剤
層（１４）を設けた上蓋（１３）を重ね合せたもの（第
２図口）、あるいは、上面に平面状に配列された複数本
の光ファイバ心線（Ｂ）を一括収容する溝（！５）を何
する基台（ＩＩ）と上蓋（１３）がヒンジ（１Ｂ）によ
り開閉可能に設けられており、開閉側において基台（１
））と上蓋（１３）の対向する面に磁石（１７）が埋込
まれている構造のもの（第２図ハ）等が用いられる。The upper cover (I3) with adhesive ffi (+41) placed on the inner surface (Fig. 2 A) and multiple optical fiber cores t!a (B) arranged in a plane on the upper surface are collectively accommodated. A top cover (13) with a glue layer (14) on its inner surface is superimposed on a base (1) having a groove (15) for opening (Fig. 2), or a flat top surface. A base (II) and a top cover (13) are provided that can be opened and closed by a hinge (1B), which serves as a groove (!5) for collectively accommodating a plurality of optical fiber cores (B) arranged in a shape. , the base (1
)) and a top cover (13) with a magnet (17) embedded in their opposing surfaces (FIG. 2C), etc. are used.
■上記端末固定具（１）にクランプされた光ファイバ心
線（Ｂ）群の端末部の被覆を光ファイバ被覆除去器（４
）を用いて一括除去する（第３図）。■ Remove the coating from the end of the optical fiber core (B) group clamped to the terminal fixture (1) using the optical fiber coating remover (4).
) to remove them all at once (Figure 3).
■端末部の被覆を一括除去することにより露出した光フ
ァイバ（Ｃ）群の端部を加傷刃（５）を用いて一括切断
する（第４図）。(2) The end portions of the optical fiber group (C) exposed by removing the coating on the terminal portions are cut at once using a scratching blade (5) (FIG. 4).
■■〜■の処理を施した相手方の光ファイバ群を準備し
、第５図のように光ファイバ（Ｃ）の端面を対向させて
多心一括融着接続機にセットし、気中載置した微動台、
（７）は接続ステージ、（８）は光ファイバ（Ｃ）のク
ランプ、（９）は放電電極棒である。Prepare a group of optical fibers that have undergone the treatments described in ■■ to ■, set them in a multi-fiber batch fusion splicer with the end faces of the optical fibers (C) facing each other as shown in Figure 5, and place them in the air. fine movement table,
(7) is a connection stage, (8) is a clamp for the optical fiber (C), and (9) is a discharge electrode rod.
■上記を融着接続機より取り出し、光ファイバ補強器に
セットし、接続部（２）を補強する。この際次のような
取扱いが可能である。(2) Take out the above from the fusion splicer, set it in the optical fiber reinforcing device, and reinforce the spliced part (2). At this time, the following handling is possible.
■−１，端末固定具（＋）と共に一体に補強する。■-1, Reinforce together with the terminal fixture (+).
（第１図参照）
■−２，接続部のみ補強し、端末固定具（りはそのまま
としておく。(See Figure 1) ■-2. Reinforce only the connection part and leave the terminal fixing device as it is.
■−３，接続部のみ補強し、端末固定具（＋）は取外し
、余長処理等の後処理を行なう。■-3. Reinforce only the connection part, remove the terminal fixture (+), and perform post-processing such as processing the excess length.
第６図は接続部補強の一例の説明図で、光ファイバの接
続部（２）を内面にホットメルト接着剤層（２２）を具
えた平板（２１）より成る補強板（２Ｇ）で上下よりサ
ンドイッチ杖に挟み、加熱ヒータ（２３）で加熱して上
記接着剤層（２２）を溶融し、一体化する。Figure 6 is an explanatory diagram of an example of reinforcing the connection part, in which the connection part (2) of the optical fiber is reinforced from above and below with a reinforcing plate (2G) consisting of a flat plate (21) with a hot melt adhesive layer (22) on the inner surface. It is sandwiched between sandwich sticks and heated with a heater (23) to melt and integrate the adhesive layer (22).
ユーブ（２４）をあらかじめ一方の光ファイバ心線（Ｂ
）群の上に挿通しておき、光ファイバ（Ｃ）の一括融若
接続後、光ファイバ接続部（２）上に上記熱収縮チュー
ブ（２４）を位置せしめ、加熱ヒータ（２３）で加熱し
て上記接着剤層（２６）を溶融し一体化する。図におい
て、（２５）は捕強心である。One of the optical fiber cores (B
) group, and after collectively splicing the optical fibers (C), the heat shrink tube (24) is positioned on the optical fiber connection part (2) and heated with the heater (23). The adhesive layer (26) is melted and integrated. In the figure, (25) is a strong center.
なお、本方式での多心一括融菅接続機は、外径調心によ
り２本の光ファイバを突合せるものであり、光ファイバ
の種類（シングルモード、多モード等）は問わない。Note that the multi-fiber batch fusion splicer of this system butts two optical fibers together by aligning the outer diameter, and the type of optical fiber (single mode, multimode, etc.) does not matter.
又本発明の一括融着接続方法は、相手方の光ファイバ心
線が複数の光ファイバを一体化した多心光ファイバテー
プ心線にも適用できることは明白であり、これにより多
心光ファイバテープ心線の単心光ファイバへの分岐部が
小型で、かつ迅速に形成できる。It is clear that the batch fusion splicing method of the present invention can also be applied to a multi-core optical fiber tape core in which a plurality of optical fibers are integrated. The branching section of the wire into a single optical fiber can be formed compactly and quickly.
（発明の効果）
上述したように本発明の一括融着接続方法によれば、従
来の単心光ファイバを１心ずつ融着接続する方法に比し
、作業時間が著しく短縮されると共に、得られた接続部
の寸法の小型化が可能となる。(Effects of the Invention) As described above, according to the batch fusion splicing method of the present invention, compared to the conventional method of fusion splicing single-core optical fibers one by one, the working time is significantly shortened and benefits are obtained. This makes it possible to reduce the size of the connected portion.
又多心光ファイバテープ心線と単心光ファイバ心線群と
の融着接続が可能となり、小型で、かつ接続損失の小さ
い分岐接続の形成が可能となる。Furthermore, it becomes possible to perform fusion splicing between a multi-core optical fiber ribbon and a group of single-core optical fibers, thereby making it possible to form a branch connection that is compact and has low splice loss.
第１図は本発明の一括融着接続方法により得られた多数
心の里心光ファイバ接続部の具体例の説明図である。
第２図（イ）〜（ハ）は多数心の単心光ファイバ心線を
端末固定具でクランプした状態の横断面図、第３図は端
末固定具にクランプした光ファイバ心線群の一括被覆除
去の説明図、第４図は光ファイバ群の一括切断の説明図
、第５図は融着接続機にセットした状態の説明図、第６
図９）及び第７図（イ）はいずれも補強の説明図、それ
ぞれ（ロ）は補強部の横断面図である。
Ａ・・・光ファイバケーブル、Ｂ・・・里心光ファイバ
心線、Ｃ・・・光ファイバ、１・・・端末固定具、２・
・・光ファイバ接続部、３・・・補強材、４・・・被覆
除去器、５・・・加傷刃、６・・・微動台、７・・・接
続ステージ、８・・・クランプ、９・・・放電電極棒、
２０・・・補強板、２４・・・熱収縮チューブ。
’４１ 目
壽２防
賽 ７ 目
俸 ８ 目
手 続 補 正 書
昭和１２年１２月２．／−日
事件の表示
昭和６２年特許願第２６７７８号
発明の名称
光ファイバの一括融着接続方法
補正をする者
事件との関係 特許出願人
住 所 大阪市東区北浜５丁目１５番地名
称（２１３） 住友電気工業株式会社代表者 用上
舌部FIG. 1 is an explanatory diagram of a specific example of a multi-fiber optical fiber splicing section obtained by the batch fusion splicing method of the present invention. Figures 2 (a) to (c) are cross-sectional views of multiple single-core optical fibers clamped with terminal fixtures, and Figure 3 shows a group of optical fibers clamped to terminal fixtures. An explanatory diagram of coating removal, Fig. 4 is an explanatory diagram of batch cutting of a group of optical fibers, Fig. 5 is an explanatory diagram of the state set in a fusion splicer, and Fig. 6 is an explanatory diagram of the state set in a fusion splicer.
FIG. 9) and FIG. 7(a) are both explanatory diagrams of reinforcement, and FIG. 7(b) is a cross-sectional view of the reinforcing portion. A...Optical fiber cable, B...Rishin optical fiber core wire, C...Optical fiber, 1...Terminal fixture, 2.
... Optical fiber connection part, 3 ... Reinforcement material, 4 ... Coating remover, 5 ... Damaging blade, 6 ... Fine movement table, 7 ... Connection stage, 8 ... Clamp, 9...discharge electrode rod,
20... Reinforcement plate, 24... Heat shrink tube. '41 Mokushu 2 Bosai 7th Sage 8th Sequence Amendment Book December 2, 1939. Display of the /-day case Patent application No. 26778 filed in 1985 Name of the invention Person who corrects the method for bulk fusion splicing of optical fibers Relationship to the case Patent applicant Address 5-15 Kitahama, Higashi-ku, Osaka City Name of the invention
Name (213) Sumitomo Electric Industries Co., Ltd. Representative Upper Tongue
Claims (4)
に配列し端末固定具でクランプして光ファイバ心線群と
なした後、一括して上記光ファイバ心線群の被覆除去及
び露出した光ファイバの端部切断を行ない、しかる後一
括して上記光ファイバの融着接続及び接続部の補強を行
なうことを特徴とする光ファイバーの一括融着接続方法
。(1) After arranging a plurality of individual optical fibers in a planar manner and clamping them with terminal fixtures to form an optical fiber group, remove the coating from the optical fiber group at once. 1. A method for collectively fusion splicing optical fibers, characterized in that the exposed ends of the optical fibers are cut, and then the optical fibers are fusion spliced and the spliced portions are reinforced.
固定具と共に一体補強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一括融着接続方法。(2) The method of bulk fusion splicing of optical fibers according to claim 1, characterized in that after the bulk fusion splicing of optical fibers, the joint portion is integrally reinforced together with the terminal fixture.
を取外して余長処理等の後処理を行なうことを特徴とす
る特許請求の範囲第１項記載の光ファイバの一括融着接
続方法。(3) The method for batch fusion splicing of optical fibers according to claim 1, characterized in that after only the connecting portion of the optical fiber is reinforced, the terminal fixing device is removed and post-processing such as surplus length processing is performed. .
ファイバを一体化したテープ状の多心光ファイバ心線で
あることを特徴とする特許請求の範囲第１項ないし第３
項記載の光ファイバの一括融着接続方法。(4) Claims 1 to 3, characterized in that the optical fiber to be fusion spliced is a tape-shaped multi-core optical fiber that integrates a plurality of optical fibers.
The method for batch fusion splicing of optical fibers described in Section 1.
Priority Applications (12)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62026778A JPH0660967B2 (en) | 1987-02-06 | 1987-02-06 | Optical fiber all-in-one fusion splicing method |
| US07/151,643 US4812010A (en) | 1987-02-06 | 1988-02-02 | Apparatus for arranging a plurality of coated optical fibers and collective fusion splicing method using the apparatus |
| KR1019880000937A KR910004713B1 (en) | 1987-02-06 | 1988-02-02 | Apparatus for arranging a plurality of coated optical fiber |
| CA000558195A CA1303340C (en) | 1987-02-06 | 1988-02-04 | Apparatus for arranging a plurality of coated optical fibers and collective fusion splicing method using the apparatus |
| NO880521A NO176077C (en) | 1987-02-06 | 1988-02-05 | A method of melt cutting a plurality of coated optical fibers and apparatus for use in carrying out the method |
| EP88101690A EP0278423B2 (en) | 1987-02-06 | 1988-02-05 | Apparatus for arranging a plurality of coated optical fibers and collective fusion splicing method using the apparatus |
| ZA880816A ZA88816B (en) | 1987-02-06 | 1988-02-05 | Apparatus for arranging a plurality of coated optical fibers and collective fusion splicing method using the apparatus |
| DE3881410T DE3881410T3 (en) | 1987-02-06 | 1988-02-05 | Device for arranging a plurality of optical fibers and method for their common arc splicing using this device. |
| CN88101187A CN1024221C (en) | 1987-02-06 | 1988-02-06 | Apparatus for arranging pluraliey of coated optical fibers and collective fusion splicing method using the apparatus |
| CA000616168A CA1334477C (en) | 1987-02-06 | 1991-09-23 | Apparatus for arranging a plurality of coated optical fibers |
| CA000616169A CA1334478C (en) | 1987-02-06 | 1991-09-23 | Apparatus for arranging a plurality of coated optical fibers |
| NO924644A NO309166B1 (en) | 1987-02-06 | 1992-12-02 | Device for arranging a plurality of coated optical fibers in a plane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62026778A JPH0660967B2 (en) | 1987-02-06 | 1987-02-06 | Optical fiber all-in-one fusion splicing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63194208A true JPS63194208A (en) | 1988-08-11 |
| JPH0660967B2 JPH0660967B2 (en) | 1994-08-10 |
Family
ID=12202757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62026778A Expired - Lifetime JPH0660967B2 (en) | 1987-02-06 | 1987-02-06 | Optical fiber all-in-one fusion splicing method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0660967B2 (en) |
| ZA (1) | ZA88816B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5546491A (en) * | 1994-06-27 | 1996-08-13 | Siemens Aktiengesellschaft | Method for producing a spliced connection between two groups of light waveguides |
| US5548672A (en) * | 1993-02-02 | 1996-08-20 | Sumitomo Electric Industries, Ltd. | Reinforced multicore optical fiber coupler |
| JP2007171824A (en) * | 2005-12-26 | 2007-07-05 | Sumitomo Electric Ind Ltd | Optical fiber holder |
| JP2007171825A (en) * | 2005-12-26 | 2007-07-05 | Sumitomo Electric Ind Ltd | Optical fiber holder and single-batch fusion connection method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56142506A (en) * | 1980-04-09 | 1981-11-06 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber connecting part |
| JPS5974518A (en) * | 1982-10-21 | 1984-04-27 | Sumitomo Electric Ind Ltd | Connecting method of multiple cores of optical fiber core by blanket arc welding |
| JPS6023813U (en) * | 1983-07-27 | 1985-02-18 | 古河電気工業株式会社 | Heater for reinforcing material for optical fiber connections |
| JPS60217314A (en) * | 1984-04-13 | 1985-10-30 | Sumitomo Electric Ind Ltd | Optical fiber branching part |
| JPS6150107A (en) * | 1984-08-20 | 1986-03-12 | Sumitomo Electric Ind Ltd | Optical fiber coupling part |
| JPS61252508A (en) * | 1985-05-02 | 1986-11-10 | Nippon Telegr & Teleph Corp <Ntt> | Formation of multicore optical fiber core terminal and forming part of multicore optical fiber core terminal |
-
1987
- 1987-02-06 JP JP62026778A patent/JPH0660967B2/en not_active Expired - Lifetime
-
1988
- 1988-02-05 ZA ZA880816A patent/ZA88816B/en unknown
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56142506A (en) * | 1980-04-09 | 1981-11-06 | Nippon Telegr & Teleph Corp <Ntt> | Optical fiber connecting part |
| JPS5974518A (en) * | 1982-10-21 | 1984-04-27 | Sumitomo Electric Ind Ltd | Connecting method of multiple cores of optical fiber core by blanket arc welding |
| JPS6023813U (en) * | 1983-07-27 | 1985-02-18 | 古河電気工業株式会社 | Heater for reinforcing material for optical fiber connections |
| JPS60217314A (en) * | 1984-04-13 | 1985-10-30 | Sumitomo Electric Ind Ltd | Optical fiber branching part |
| JPS6150107A (en) * | 1984-08-20 | 1986-03-12 | Sumitomo Electric Ind Ltd | Optical fiber coupling part |
| JPS61252508A (en) * | 1985-05-02 | 1986-11-10 | Nippon Telegr & Teleph Corp <Ntt> | Formation of multicore optical fiber core terminal and forming part of multicore optical fiber core terminal |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5548672A (en) * | 1993-02-02 | 1996-08-20 | Sumitomo Electric Industries, Ltd. | Reinforced multicore optical fiber coupler |
| US5546491A (en) * | 1994-06-27 | 1996-08-13 | Siemens Aktiengesellschaft | Method for producing a spliced connection between two groups of light waveguides |
| JP2007171824A (en) * | 2005-12-26 | 2007-07-05 | Sumitomo Electric Ind Ltd | Optical fiber holder |
| JP2007171825A (en) * | 2005-12-26 | 2007-07-05 | Sumitomo Electric Ind Ltd | Optical fiber holder and single-batch fusion connection method |
Also Published As
| Publication number | Publication date |
|---|---|
| ZA88816B (en) | 1988-08-08 |
| JPH0660967B2 (en) | 1994-08-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |