JPS6060609A - Formation of optical fiber junction with reinforcement - Google Patents
Formation of optical fiber junction with reinforcementInfo
- Publication number
- JPS6060609A JPS6060609A JP16980883A JP16980883A JPS6060609A JP S6060609 A JPS6060609 A JP S6060609A JP 16980883 A JP16980883 A JP 16980883A JP 16980883 A JP16980883 A JP 16980883A JP S6060609 A JPS6060609 A JP S6060609A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- polymer resin
- reinforcing member
- bubble
- mold
- 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
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
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2558—Reinforcement of splice joint
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は光フアイバ素線接続部が補強部材内で該補強部
材に高分子樹脂で固定されている補強付光ファイバ接続
部の形成方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a reinforced optical fiber connection portion in which an optical fiber connection portion is fixed to a reinforcing member using a polymer resin.
従来のこの種の補強付光ファイバ接続部は、第１図及び
第２図に示すように、接続すべき光フアイバ心線１．１
′の先端で被覆層２，２′が除去されて中から光フアイ
バ素線３，３′が露出され、これら光フアイバ素線３，
３′の先端を突合せた状態でアーク融着等によシ光ファ
イバ零線接続部４を形成し、これを基板５と蓋６とから
なる補強部材７の基板５に設けられた素線部収容溝８と
その両端に連続する被覆部収容溝９，９′とに、シリコ
ーン系やエポキシ系の高分子樹脂１０と共に収容し、蓋
６’ｆ−Ｌめて接着固定した構造であった。As shown in FIGS. 1 and 2, this type of conventional reinforced optical fiber connection section has optical fiber cores 1.1 to be connected.
The coating layers 2, 2' are removed at the tips of the optical fibers 3, 3', and the optical fibers 3, 3' are exposed from inside.
An optical fiber zero wire connection section 4 is formed by arc fusion or the like with the ends of the ends 3' abutted against each other, and this is connected to the bare wire section provided on the substrate 5 of the reinforcing member 7 consisting of the substrate 5 and the lid 6. It had a structure in which it was housed together with a silicone-based or epoxy-based polymer resin 10 in the housing groove 8 and covering part housing grooves 9, 9' continuous to both ends thereof, and the lids 6'f-L were bonded and fixed.
しかしながら、このように補強された光フアイバ接続部
では、温度変化が加わった場合、伝送損失の増加をまね
き、甚しいときには光ノアイノ４素線の破断が生ずる欠
点があった。このような伝送損失の増加や光フアイバ素
線の破断の原因は、第２図に示すように高分子樹脂１０
中に気泡１１が ′存在し、温度変化に伴う熱歪によっ
て気泡１１の界面に応力が集中し、これによシ光ファイ
バ素線３．３′に歪が加わるためである。気泡１１の発
生原因としては、次の３点がある。However, the optical fiber connection portion reinforced in this manner has the disadvantage that when temperature changes are applied, the transmission loss increases, and in severe cases, the optical fiber connection portion may break. The cause of this increase in transmission loss and breakage of the optical fiber is due to the polymer resin 10 as shown in Figure 2.
This is because air bubbles 11' are present in the optical fiber 3', and stress is concentrated at the interface of the air bubbles 11 due to thermal strain caused by temperature changes, thereby applying strain to the optical fiber 3.3'. There are three reasons why the bubbles 11 occur:
（Ａ） 高分子樹脂の中にも表もと存在する。(A) It is also commonly present in polymer resins.
（Ｂ） 高分子樹脂を光フアイバ素線の表面に塗るとき
に発生する。(B) Generated when applying polymer resin to the surface of optical fiber.
（Ｃ） 高分子樹脂が硬化する際に発生する。(C) Generated when the polymer resin is cured.
このうち、（５）の点については高分子樹脂の真空脱泡
処理によシ解決でき、（Ｂ）の点については光フアイバ
素線の表面を清浄に保つとともに高分子樹脂の塗布方法
を工夫することによシ解決できるが、（Ｃ）の点につい
ては未解決である。Of these, point (5) can be solved by vacuum degassing of the polymer resin, and point (B) can be solved by keeping the surface of the optical fiber clean and devising a method for applying the polymer resin. However, point (C) remains unresolved.
高分子樹脂が硬化する過程で生ずる気泡のメカニズムと
しては、次の２つが考えられる。The following two mechanisms can be considered for the bubbles generated during the curing process of the polymer resin.
（イ）硬化反応時に生じる生成物が気泡として残留する
。(a) Products generated during the curing reaction remain as bubbles.
（ロ）硬化反応が一様に進まず、第３図（４）に示すよ
うに成る部分が先に殻状に硬化し、この殻状の硬化部分
１０Ａで未硬化部分１０Ｂが包囲され、第３図（Ｂ）に
示すように殻状の硬化部分１０Ａ内の未硬化部分１０Ｂ
が硬化するときの収縮によシ第３図（Ｃ）に示すように
気泡１１が発生して閉じ込められる。(b) The curing reaction does not proceed uniformly, and the portion shown in FIG. 3 (4) hardens into a shell shape first. As shown in FIG. 3(B), the uncured portion 10B within the shell-shaped hardened portion 10A
Due to shrinkage when the resin hardens, air bubbles 11 are generated and trapped as shown in FIG. 3(C).
例えば、現在光フアイバ補強用高分子樹脂として広く使
用されているシリコーン系樹脂では、空気中の水、分と
反応（縮合反応）してアルコールを生成するものがある
が、この場合（イ）のメカニズムにより気泡１１が発生
する恐れがある。しかし、（イ）の対策としては、副生
成分を生じない付加反応型の高分子樹脂を用いればよい
。For example, some silicone resins that are currently widely used as polymeric resins for reinforcing optical fibers react with water and moisture in the air (condensation reaction) to produce alcohol. There is a possibility that bubbles 11 may be generated due to the mechanism. However, as a countermeasure for (a), it is sufficient to use an addition reaction type polymer resin that does not produce by-products.
本発明の目的は、高分子樹脂の硬化時に発生する気泡の
問題を解決できる補強付光ファイ／？接続部の形成方法
を提供するにある。An object of the present invention is to solve the problem of bubbles generated when polymer resin is cured. The present invention provides a method for forming a connection.
本発明は、接続すべき双方の光フアイバ心線の接続端側
の被覆をそれぞれ除去して光ファイ／々素線をそれぞれ
露出させ、前記両光ファイバ素線を相互に突き合せ接続
して光フアイバ素線接続部を形成し、この光フアイバ素
線接続部及びその両側の光フアイバ素線の周囲を補強部
材内で高分子樹脂により該補強部材に固定して補強付光
ファイバ接続部を形成する補強付光ファイバ接続部の形
成方法において、前記光フアイバ緊線接続部及びその両
側の前記光フアイバ素線の表面に脱泡した高分子樹脂を
被覆して無気泡高分子樹脂層を形成し、しかる後この無
気泡高分子樹脂層の形成部分を前記補強部材内で高分子
樹脂によＱ該補強部材に固定することを特徴とするもの
である。In the present invention, the coatings on the connection ends of both optical fiber core wires to be connected are removed to expose the optical fibers, and the two optical fiber wires are butt-connected to each other to produce a light beam. A fiber connecting portion is formed, and the periphery of the optical fiber connecting portion and the optical fibers on both sides thereof are fixed to the reinforcing member with a polymer resin within a reinforcing member to form a reinforced optical fiber connecting portion. In the method for forming a reinforced optical fiber connection section, the surface of the optical fiber tension connection section and the optical fiber strands on both sides thereof are coated with defoamed polymer resin to form a bubble-free polymer resin layer. Then, the portion on which the non-cellular polymeric resin layer is formed is fixed to the reinforcing member with a polymeric resin within the reinforcing member.
以下本発明の実施例を図面を参照して詳細に説明する。Embodiments of the present invention will be described in detail below with reference to the drawings.
本実施例では、例えば第４図に示すようにビーカー１２
に入れた高分子樹脂１０を真空容器１３内に収容し、真
空容器１３内を真空引きすることによシ高分子樹脂１０
内の気泡１１を真空脱泡させる。得られた無気泡高分子
樹脂１０Ａを第５図に示すように注射器１３に入れる。In this embodiment, for example, as shown in FIG.
The polymer resin 10 is placed in a vacuum container 13, and the interior of the vacuum container 13 is evacuated to remove the polymer resin 10.
The air bubbles 11 inside are defoamed under vacuum. The obtained bubble-free polymer resin 10A is placed in a syringe 13 as shown in FIG.
光フアイバ素線３，３′はその先端を突き合せた状態で
アーク融着等によシ接続して第１図に示すような光フア
イバ素線接続部４を形成する。この光ファイバ緊締接続
部４及びその両側の光フアイバ素線３゜３′の部分を第
５図に示すように金型１５内の図示しない管孔状型孔の
中心にセットし、金型１５の注入孔１６よシ前述した注
射器１４で型孔内に脱泡高分子樹脂１０Ａ’を注入し、
第６図に示すように光フアイバ素線接続部４及びその両
側の光フアイバ素線３，３′の外周に無気泡高分子樹脂
層１０Ａを形成する。このとき、金型１５に残留空気の
逃げ道を作っておくと、空気をまき込むことなく脱泡高
分子樹脂１０八′の注入充填を行うことができる。また
、金型１５内にヒータ１７を内蔵させておき、これにヒ
ータ用電源１８から通電して金型１５を加熱すると、無
気泡高分子樹脂層１０Ａの硬化時間を短縮することがで
きる。無気泡高分子樹脂層１０Ａが硬化したら金型１５
から取り出す。The optical fiber wires 3, 3' are connected by arc fusion or the like with their ends abutted against each other to form an optical fiber wire connection portion 4 as shown in FIG. The optical fiber clamping connection portion 4 and the optical fiber strands 3° 3' on both sides thereof are set at the center of a tubular hole (not shown) in the mold 15, as shown in FIG. Inject the defoamed polymer resin 10A' into the mold hole through the injection hole 16 with the syringe 14 described above,
As shown in FIG. 6, a cell-free polymer resin layer 10A is formed around the outer periphery of the optical fiber wire connection portion 4 and the optical fiber wires 3, 3' on both sides thereof. At this time, by creating an escape route for residual air in the mold 15, the defoamed polymer resin 108' can be injected and filled without introducing air. Further, by incorporating a heater 17 in the mold 15 and heating the mold 15 by supplying power to the heater 17 from the heater power source 18, the curing time of the bubble-free polymer resin layer 10A can be shortened. Once the bubble-free polymer resin layer 10A is cured, the mold 15
Take it out.
得られた第６図に示すような無気泡高分子樹脂層１０Ａ
の被覆部分を第１図に示すような補強部材７の素線部収
容溝８内に収容し、且つその両側の被覆層２，２′の部
分を被覆部収容溝９，９′内に収容する。このとき溝８
、９ 、９’内及び蓋６の内表面には予め高分子樹脂
を塗布しておく。かかる状態で蓋６をしめると、第７図
に示すように無気泡高分子樹脂層１０Ａの外周に高分子
樹脂層１０が形成される。この高分子樹脂層１０を基板
５及び蓋６に接着させ、硬化させる。The resultant cell-free polymer resin layer 10A as shown in FIG.
The coated portion of the reinforcing member 7 is housed in the strand housing groove 8 of the reinforcing member 7 as shown in FIG. do. At this time groove 8
, 9, 9' and the inner surface of the lid 6 are coated with a polymer resin in advance. When the lid 6 is closed in this state, a polymer resin layer 10 is formed around the outer periphery of the bubble-free polymer resin layer 10A, as shown in FIG. This polymer resin layer 10 is adhered to the substrate 5 and lid 6 and cured.
このようにして無気泡高分子樹脂層１０Ａ’（ｉ？影形
成ると、気泡工１が光フアイバ素線３，３′及びその接
続部４０表面に接触又は近接しなくなり、またこの無気
泡高分子樹脂層１０Ａが気泡１１による応力に対して緩
衝層として作用し、気泡１１に基因する伝送損失の増加
及び光フアイバ素線３゜３′の破断を防止できる。When the bubble-free polymer resin layer 10A' (i? shadow is formed in this way), the bubble layer 1 no longer comes into contact with or comes close to the surfaces of the optical fibers 3, 3' and their connection parts 40, and this bubble-free height The molecular resin layer 10A acts as a buffer layer against the stress caused by the bubbles 11, and can prevent an increase in transmission loss and breakage of the optical fiber 3.degree. 3' due to the bubbles 11.
Ａ剤（ペースポリマー、触媒）及びＢ剤（り昌橋剤、反
応抑制剤）よシなるシリコーンを混合し、第４図のよう
にして真空脱泡する。この場合の混合液の粘度は約２．
ＯＯＯＣＰでおシ、１０＋ｍｎＨｇ程度の真空にする
ことにより１０分程度で完全に脱泡できる。粘度が１０
，０ＯＯＣＰｅ越えると真空脱泡が困難となるので、粘
度としては２，０ＯＯＣＰのものを選択した。光フアイ
バ素線３，３′及びその接続部４を第５図に示すような
金型１５内にセットし、注射器１４により脱泡シリコー
ンを金型１５内に注入孔１６よシ注入する。このとき、
金型１５に残留空気の逃げ道を作っておくと、脱泡シリ
コーンは低粘度であるので空気をまき込むことなく光フ
アイバ素線３，３′及びその接続部４の外周に無気泡シ
リコーン層１０Ａｋ形成できる。金型１５内にはヒータ
１７を内蔵させ、無気泡クリコーン層１０Ａを１７０℃
で数十秒加熱したところ硬化した。ヒータ１７の加熱温
度を更に上げると、硬化時間をよシ短縮できるが、１８
０℃以上に表ると光フアイバ素線３，３′の両端に２次
波覆層として存在する保護用のナイロンが溶融するので
、ナイロン被覆の光フアイバ素線３，３′の場合には１
８０℃以上の加熱は望ましくない。硬化後の無気泡シリ
コーン層１０Ａのヤング率は約０．１ｋｇ／ｍ２であシ
、充分な緩衝作用が得られる。以上のような操作の結果
、第６図のような形状のものが得られる。次に、従来よ
シ広く使用されてきた空気中の水分と縮合反応するタイ
プの一液性シリコーン（粘度４０，０００ ＣＰ、粘度
がｉｏ、ｏｏｏよシ小さいと小さな衝撃でも流れてしま
って扱いにくいので、粘度はｔ ｏ、 ｏ ｏ ｏ ｃ
ｐ以上が望ましい。）を第１図に示すような補強部材７
の谷溝８，９゜９′及び蓋６の内表面等に塗布した後、
これらの溝８ ｇ ９ ＃ ９’内に第６図に示す無気
泡シリコーン層１０Ａの形成部分をセットし、蓋６を被
せて固定し、−液性シリコーン層１０ｇ硬化させる。補
強部材７を高強度で低線膨張係数をもつ繊維強化プラス
チック（ＦＲＰ ）で形成すると、シリコーンの引張強
度が増し、安定した温度特性を得ることができる。Silicones such as Part A (pace polymer, catalyst) and Part B (linking agent, reaction inhibitor) are mixed and defoamed under vacuum as shown in FIG. The viscosity of the mixed liquid in this case is approximately 2.
By using OOOCP and creating a vacuum of about 10+mnHg, complete defoaming can be achieved in about 10 minutes. Viscosity is 10
If the viscosity exceeds .0OOCPe, vacuum degassing becomes difficult, so a viscosity of 2.0OOCPe was selected. The optical fiber wires 3, 3' and their connecting portions 4 are set in a mold 15 as shown in FIG. 5, and defoamed silicone is injected into the mold 15 through the injection hole 16 using a syringe 14. At this time,
By creating an escape route for the residual air in the mold 15, the bubble-free silicone layer 10Ak is formed around the outer periphery of the optical fibers 3, 3' and their connecting portions 4 without entraining air since the defoamed silicone has a low viscosity. Can be formed. A heater 17 is built into the mold 15, and the bubble-free crecone layer 10A is heated to 170°C.
When heated for several tens of seconds, it hardened. If the heating temperature of the heater 17 is further increased, the curing time can be further shortened.
If the temperature exceeds 0°C, the protective nylon present as a secondary wave covering layer at both ends of the optical fiber strands 3, 3' will melt, so in the case of nylon-coated optical fiber strands 3, 3', 1
Heating above 80°C is undesirable. The Young's modulus of the bubble-free silicone layer 10A after curing is about 0.1 kg/m 2 , and a sufficient cushioning effect can be obtained. As a result of the above operations, a shape as shown in FIG. 6 is obtained. Next, we used a type of one-component silicone that condenses with moisture in the air, which has been widely used in the past (viscosity 40,000 CP, io, ooo). Therefore, the viscosity is to, o o o c
p or more is desirable. ) as shown in FIG.
After applying it to the valley grooves 8, 9° 9' and the inner surface of the lid 6,
The part where the bubble-free silicone layer 10A shown in FIG. 6 is to be formed is set in these grooves 8g9#9', and the lid 6 is placed and fixed, and the liquid silicone layer 10g is cured. When the reinforcing member 7 is made of fiber-reinforced plastic (FRP) having high strength and a low coefficient of linear expansion, the tensile strength of silicone increases and stable temperature characteristics can be obtained.
なお、補強部材７に塗布する高分子樹脂は、脱泡高分子
樹脂でもよいことは勿論である。It goes without saying that the polymer resin applied to the reinforcing member 7 may be a defoamed polymer resin.
以上説明したように本発明に係る補強付光ファイバ接続
部の形成方法においては、光フアイバ素線及びその接続
部の表面に脱泡した高分子樹脂を被覆して無気泡高分子
樹脂層を形成した後、この無気泡高分子樹脂層の形成部
分を補強部材内で高外子樹脂によシ該補強部材に固定す
るので、高分子樹脂の硬化時に光フアイバ素線及びその
接続部の表面に気泡が閉じ込められることがなく、無気
泡高分子樹脂層を形成することができる。従って、本発
明の方法によシ形成された補強付光ファイバ接続部によ
れば、気泡が光フアイバ素線及びその接続部の表面に接
触又は近接しなくなり、また無気泡高分子樹脂層が気泡
による応力に対して緩衝層として作用し、気泡に基因す
る伝送損失の増加及び光フアイバ素線の破断を防止する
ことができる。As explained above, in the method for forming a reinforced optical fiber connection part according to the present invention, the surface of the optical fiber and its connection part is coated with defoamed polymer resin to form a bubble-free polymer resin layer. After that, the formed portion of the non-cell polymer resin layer is fixed to the reinforcing member using a high-density resin within the reinforcing member, so that when the polymer resin is cured, the surface of the optical fiber and its connection portion is A bubble-free polymer resin layer can be formed without trapping air bubbles. Therefore, according to the reinforced optical fiber connection portion formed by the method of the present invention, air bubbles do not come into contact with or come close to the surface of the optical fiber wire and its connection portion, and the air bubble-free polymer resin layer does not contain air bubbles. It acts as a buffer layer against the stress caused by bubbles, and can prevent an increase in transmission loss and breakage of the optical fiber due to bubbles.
第１図は補強付光ファイバ接続部の組立途中の状態の斜
視図、第２図は従来の補強付光７アイパ接続部における
高分子樹脂の被覆状態を示す縦断面図、第３図（Ａ）
（Ｂ） （Ｃ）は高分子樹脂中に気泡が閉じ込められる
過程を示す説明図、第４図は真空脱泡手段の一例を示す
縦断面図、第５図は本発明の方法による無気泡高分子樹
脂層の形成工程の斜視図、第６図は本発明の方法によシ
形成された無気泡高分子樹脂層の形成状態の一例を示す
縦断面図、第７図は本発明の方法で形成された補強付光
７アイパ接続部妃おける光フアイバ素線及びその接続部
に対する高分子樹脂の被覆状態の一例を示す縦断面図で
ある。
１．１′・・・光フアイバ心線、２，２′・・・被覆層
、３゜３′・・・光７アイパ素線、４・・・光フアイバ
素線接続部、５・・・基板、６・・・蓋、７・・・補強
部材、８・・・素線部収容溝、９・・・被覆部収容溝、
１０・・・高分子樹脂、ＩＯＡ・・・無気泡高分子樹脂
層、１０Ａ′・・・脱泡高分子樹脂、１１・・・気泡。
＄２母
＄３図Fig. 1 is a perspective view of a reinforcing optical fiber connection part in the middle of assembly, Fig. 2 is a vertical cross-sectional view showing a state of polymer resin coating in a conventional reinforced optical fiber connection part, and Fig. 3 (A )
(B) and (C) are explanatory diagrams showing the process in which air bubbles are trapped in a polymer resin, Fig. 4 is a longitudinal cross-sectional view showing an example of a vacuum defoaming means, and Fig. 5 is a bubble-free height according to the method of the present invention. FIG. 6 is a perspective view of the process of forming a molecular resin layer, FIG. 6 is a vertical cross-sectional view showing an example of the state of formation of a non-cellular polymer resin layer formed by the method of the present invention, and FIG. 7 is a perspective view of the process of forming a molecular resin layer. FIG. 7 is a longitudinal cross-sectional view showing an example of a state in which the optical fiber wire and its connection portion are coated with a polymer resin in the formed reinforced optical fiber connection portion. 1.1'... Optical fiber core wire, 2,2'... Covering layer, 3゜3'... Optical 7-iper wire, 4... Optical fiber wire connection portion, 5... Substrate, 6... Lid, 7... Reinforcement member, 8... Element wire part accommodation groove, 9... Covering part accommodation groove,
10... Polymer resin, IOA... Cell-free polymer resin layer, 10A'... Defoamed polymer resin, 11... Bubbles. $2 Mother $3 Figure
Claims (1)
れぞれ除去して光フアイバ素線をそれぞれ露出させ、前
記両光ファイバ素線を相互に突き合せ接続して光フアイ
バ素線接続部を形成し、この光フアイバ素線接続部及び
その両側の光７アイパ素線の周囲を補強部材内で高分子
樹脂によシ該補強部材に固定して補強付光ファイバ接続
部を形成する補強付光ファイバ接続部の形成方法におい
て、前記光フアイバ素線接続部及びその両側の前記光フ
アイバ素線の表面に脱泡した高分子樹脂を被覆して無気
泡高分子樹脂層を形成し、しかる後この無気泡高分子樹
脂層の形成部分を前記補強部材内で高分子樹脂によシ該
補強部材に固定することを特徴とする補強付光ファイバ
接続部の形成方法。The coatings on the connection end sides of both optical fibers to be connected are removed to expose the respective optical fibers, and the optical fibers are butt-connected to each other to form an optical fiber connection section. This optical fiber connecting portion and the periphery of the optical fiber wire on both sides thereof are covered with a polymer resin within a reinforcing member and fixed to the reinforcing member to form a reinforced optical fiber connecting portion. In the method for forming an optical fiber connection part, the surface of the optical fiber connection part and the optical fiber on both sides thereof is coated with defoamed polymer resin to form a bubble-free polymer resin layer, and then a bubble-free polymer resin layer is formed. A method for forming a reinforced optical fiber connection section, comprising: fixing the formed portion of the bubble-free polymer resin layer to the reinforcing member using a polymer resin within the reinforcing member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16980883A JPS6060609A (en) | 1983-09-14 | 1983-09-14 | Formation of optical fiber junction with reinforcement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16980883A JPS6060609A (en) | 1983-09-14 | 1983-09-14 | Formation of optical fiber junction with reinforcement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6060609A true JPS6060609A (en) | 1985-04-08 |
Family
ID=15893277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16980883A Pending JPS6060609A (en) | 1983-09-14 | 1983-09-14 | Formation of optical fiber junction with reinforcement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6060609A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5518238B2 (en) * | 1976-02-16 | 1980-05-17 | ||
| JPS5569113A (en) * | 1978-11-21 | 1980-05-24 | Nippon Telegr & Teleph Corp <Ntt> | Reinforcing method of optical fiber fusion-connected part |
-
1983
- 1983-09-14 JP JP16980883A patent/JPS6060609A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5518238B2 (en) * | 1976-02-16 | 1980-05-17 | ||
| JPS5569113A (en) * | 1978-11-21 | 1980-05-24 | Nippon Telegr & Teleph Corp <Ntt> | Reinforcing method of optical fiber fusion-connected part |
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