JPS6146414B2 - - Google Patents
Info
- Publication number
- JPS6146414B2 JPS6146414B2 JP53066523A JP6652378A JPS6146414B2 JP S6146414 B2 JPS6146414 B2 JP S6146414B2 JP 53066523 A JP53066523 A JP 53066523A JP 6652378 A JP6652378 A JP 6652378A JP S6146414 B2 JPS6146414 B2 JP S6146414B2
- Authority
- JP
- Japan
- Prior art keywords
- rod
- shaped member
- shaped members
- optical fiber
- contact surface
- 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.)
- Expired
Links
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 2
- 239000013307 optical fiber Substances 0.000 description 17
- 238000010438 heat treatment Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/028—Drawing fibre bundles, e.g. for making fibre bundles of multifibres, image fibres
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/02—External structure or shape details
- C03B2203/04—Polygonal outer cross-section, e.g. triangular, square
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Description
【発明の詳細な説明】
本発明は光通信部門などで用いられる光フアイ
バの製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing optical fibers used in the optical communications sector and the like.
一般に、この種の部門で用いられる光フアイバ
は、コア用の層を軸芯に有し、その外周にクラツ
ド用の層を有するガラス系の棒状部材（プリフオ
ームロツド）が加熱状態で延伸され、これにより
製造されていたが、このようにして得られる単芯
の光フアイバは光ケーブルを構成する際に多数本
の光フアイバを集束しなければならないので、当
該集束とその一体化に手数がかかりすぎていた。 Generally, optical fibers used in this type of sector are made by heating and drawing a glass-based rod-shaped member (preform rod) that has a core layer on the axis and a cladding layer on the outer periphery. However, since the single-core optical fiber obtained in this way requires convergence of a large number of optical fibers when constructing an optical cable, convergence and integration are time-consuming. It was too late.
そこで、上記の棒状部材を集束状態にして加熱
延伸する多芯型光フアイバの製造方法も提案され
てはいるが、この方法による場合では、つぎのよ
うな問題があつてその実施が満足に行えず、高品
質の光フアイバを得ることができなかつた。 Therefore, a method for manufacturing a multi-core optical fiber has been proposed in which the above-mentioned rod-shaped members are bundled and heated and stretched, but this method has the following problems and cannot be carried out satisfactorily. However, it was not possible to obtain high quality optical fiber.
つまり、上記の棒状部材は断面が円形となつて
いるので所定の状態に集束するのに難度が伴い、
集束状態の安定性も得られず、さらに該集束状態
を積俵型などとした場合には各棒状部材の対接部
間に空隙が生じ、該俸状部材の加熱延伸（紡糸）
時に上記空隙が膨脹して断線が生じたり、気泡が
残置されるなどの問題点を有していた。 In other words, since the rod-shaped member mentioned above has a circular cross section, it is difficult to focus it in a predetermined state.
The stability of the bundled state cannot be obtained, and furthermore, when the bundled state is made into a stacked bale type, a gap is created between the opposing parts of each rod-shaped member, and the heated drawing (spinning) of the bale-shaped member
At times, the above-mentioned voids expand, causing wire breakage and leaving bubbles behind.
本発明は上記の問題点に鑑み、多芯型の光フア
イバが高品質に、しかも技術的難度を伴うことな
く製造できるようにしたものであり、以下その方
法を図示と共に説明する。 In view of the above-mentioned problems, the present invention enables the production of multi-core optical fibers with high quality and without any technical difficulty.The method will be described below with reference to the drawings.
第１図イ，ロにおいて１は何れもガラス繊維用
棒状部材（プリフオームロツド）であり、これら
棒状部材１は、軸芯にコア用の層を有していると
共にその外周にはクラツド用の層を有していて既
知の外付CVD法、内付けCVD法などにより作製
される。 In Figures 1A and 1B, 1 is a rod-shaped member for glass fiber (preform rod), and these rod-shaped members 1 have a layer for the core on the axis and a layer for the cladding on the outer periphery. It has a layer of , and is manufactured by the known external CVD method, internal CVD method, etc.
さらに上記複数本の棒状部材１には、その周面
長手方向に扁平な対接面２がそれぞれ形成され、
この対接面２を介して各棒状部材１はそれぞれ図
示のように対接される。 Further, each of the plurality of rod-shaped members 1 is formed with a flat contact surface 2 in the longitudinal direction of the circumferential surface thereof,
Each rod-shaped member 1 is brought into contact with each other via this contact surface 2 as shown in the figure.
ついで上記の集束状態を固定すべく、各棒状部
材１は第２図イ，ロのように、長手方向の一端が
熱融着により止めつけられると共に他端には熱収
縮性の外被管３が嵌装されて該管３が加熱手段に
より各棒状部材１の外周に固着される。 Next, in order to fix the above-mentioned condensed state, each rod-shaped member 1 is fixed at one longitudinal end by heat fusion, and a heat-shrinkable jacket tube 3 is attached to the other end, as shown in FIG. is fitted and the tube 3 is fixed to the outer periphery of each rod-shaped member 1 by heating means.
このようにして集束固定された各棒状部材１
は、高温の加熱雰囲気内にその一端から内挿され
ることになるが、この際の加熱装置としては、１
例として両端開口状態の加熱用筒体を有する電気
炉等が採用され、そして該加熱用筒体内にその一
端から緩徐に内挿される上記集束状態の各棒状部
材１は、その溶融端が一定の高速で引きとられ、
これにより延伸されて所望外径の多芯型光フアイ
バーに製造されるのである。 Each rod-shaped member 1 focused and fixed in this way
will be inserted into a high-temperature heating atmosphere from one end, and the heating device at this time will be 1
As an example, an electric furnace or the like having a heating cylinder with both ends open is adopted, and each of the rod-like members 1 in the converged state is inserted slowly into the heating cylinder from one end so that its melting end is fixed. taken away at high speed,
In this way, it is drawn and manufactured into a multicore optical fiber having a desired outer diameter.
第３図イ，ロは上記により得られた光フアイバ
４の断面形状を示したものであり、同図イのもの
は前記第１〜２図のイから、同図ロのものは第１
〜２図のロからそれぞれ得られるようになる。 Figures 3A and 3B show the cross-sectional shapes of the optical fibers 4 obtained in the above manner.
〜2 can be obtained from B in Figure 2.
この場合、光フアイバ４の外周面は第１図の状
態に比べて凹凸のない状態となつているが、これ
は加熱溶融時の表面張力により丸みをおびた結果
であり、この状態の光フアイバ外周には該光フア
イバ４を保護するための適当な被覆層５が施され
る。 In this case, the outer circumferential surface of the optical fiber 4 is in a state with no irregularities compared to the state shown in FIG. A suitable coating layer 5 for protecting the optical fiber 4 is applied to the outer periphery.
以上説明した通り、本発明の方法によるとき
は、複数本の棒状部材１を集束状態にして目的と
する多芯型光フアイバを得るものであるから、多
芯型光フアイバ４を用いてケーブル化する場合で
は、少数の光フアイバ４で加剰的に芯数を増して
いくことができ、従つて芯数の多いケーブル加工
までが楽に行えるようになる。 As explained above, when the method of the present invention is used, a plurality of rod-shaped members 1 are brought into a condensed state to obtain the desired multi-core optical fiber, so the multi-core optical fiber 4 is used to form a cable. In this case, the number of fibers can be increased additively with a small number of optical fibers 4, and therefore cables with a large number of fibers can be processed easily.
しかも各棒状部材１は、その周面長手方向に扁
平な対接面２が形成され、これら対接面２を合せ
ることにより集束化されるから、該集束時にずれ
動くことのない高い安定性が得られ、従つてこの
点で集束作業が容易に行えるようになり、また、
扁平な対接面２を合せることにより集束された各
棒状部材１の対接部間には空隙などが一切生ぜ
ず、従つてこのように集束された当該棒状部材１
の加熱延伸（紡糸）時において空隙膨脹による断
線や気泡残置などが生じることもなく、高品質の
多芯型光フアイバが失敗なく製造できるようにな
る。 In addition, each rod-shaped member 1 has a flat contact surface 2 formed in the longitudinal direction of its circumferential surface, and is focused by bringing these contact surfaces 2 together, so that it has high stability without shifting during the focusing. obtained, thus making it easier to perform focusing operations at this point, and
By aligning the flat contact surfaces 2, there is no gap between the contact portions of each rod-like member 1, and therefore the rod-like members 1 are bundled in this manner.
During heating drawing (spinning), there is no disconnection or air bubbles left behind due to void expansion, and high-quality multicore optical fibers can be manufactured without failure.
図面は本発明の実施例を示した説明図であり、
第１図イ，ロおよび第２図イ，ロは棒状部材の各
種集束状態を示した断面図と斜視図、第３図イ，
ロは該各集束状態の棒状部材から得られた光フア
イバの断面図である。
１……棒状部材、２……対接面、４……光フア
イバ。
The drawings are explanatory diagrams showing embodiments of the present invention,
Figures 1A and 2B and 2A and 2B are cross-sectional views and perspective views showing various convergence states of the rod-shaped member, and Figure 3A,
B is a sectional view of an optical fiber obtained from the rod-shaped member in each of the focused states. 1... Rod-shaped member, 2... Opposing surface, 4... Optical fiber.
Claims (1)
な対接面を形成し、複数本の該棒状部材を上記対
接面により対接させて当該対接部間に空隙のない
状態にすると共にこれら棒状部材を相互に止めつ
け、これにより集束状態となつた各棒状部材をそ
の一端から加熱雰囲気内に導入して順次加熱溶融
すると共に該溶融端を延伸するようにしたことを
特徴とする光フアイバの製造方法。1. Forming a flat contact surface in the longitudinal direction of the circumferential surface of a rod-shaped member for glass fiber, and making a plurality of rod-shaped members face each other by the said contact surface so that there is no gap between the contact portions, and The rod-shaped members are fixed together, and each of the rod-shaped members brought into a focused state is introduced from one end into a heated atmosphere and sequentially heated and melted, and the melted ends are stretched. Method of manufacturing fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6652378A JPS54158239A (en) | 1978-06-02 | 1978-06-02 | Production of optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6652378A JPS54158239A (en) | 1978-06-02 | 1978-06-02 | Production of optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54158239A JPS54158239A (en) | 1979-12-13 |
| JPS6146414B2 true JPS6146414B2 (en) | 1986-10-14 |
Family
ID=13318308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6652378A Granted JPS54158239A (en) | 1978-06-02 | 1978-06-02 | Production of optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54158239A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3016705A1 (en) * | 1980-04-30 | 1981-11-05 | Siemens AG, 1000 Berlin und 8000 München | GLASS FIBER FOR LIGHTWAVE GUIDE PURPOSES AND METHOD FOR THEIR PRODUCTION |
| JPS5821220A (en) * | 1981-07-30 | 1983-02-08 | Showa Electric Wire & Cable Co Ltd | End part of optical fiber and its manufacture |
| JPS60225104A (en) * | 1984-04-23 | 1985-11-09 | Sumitomo Electric Ind Ltd | Manufacture of multicore optical fiber |
| JP2007294371A (en) * | 2006-03-30 | 2007-11-08 | Anden | Sealing structure of hermetically-sealed relay, and its mounting method |
-
1978
- 1978-06-02 JP JP6652378A patent/JPS54158239A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54158239A (en) | 1979-12-13 |
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