JPH03141132A - Production of matrix for optical fiber with eccentric core - Google Patents
Production of matrix for optical fiber with eccentric coreInfo
- Publication number
- JPH03141132A JPH03141132A JP1279453A JP27945389A JPH03141132A JP H03141132 A JPH03141132 A JP H03141132A JP 1279453 A JP1279453 A JP 1279453A JP 27945389 A JP27945389 A JP 27945389A JP H03141132 A JPH03141132 A JP H03141132A
- Authority
- JP
- Japan
- Prior art keywords
- matrix
- base material
- core
- center
- eccentric 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.)
- Pending
Links
- 239000013307 optical fiber Substances 0.000 title claims description 13
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000011159 matrix material Substances 0.000 title abstract 8
- 239000000463 material Substances 0.000 claims description 42
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 11
- 230000005484 gravity Effects 0.000 abstract description 4
- 239000000377 silicon dioxide Substances 0.000 abstract 5
- 230000010354 integration Effects 0.000 abstract 1
- 239000010453 quartz Substances 0.000 description 10
- 238000005253 cladding Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000000835 fiber Substances 0.000 description 5
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000007858 starting 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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
- C03B37/01222—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube for making preforms of multiple core optical fibres
-
- 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
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
- C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/32—Eccentric core or cladding
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2203/00—Fibre product details, e.g. structure, shape
- C03B2203/34—Plural core other than bundles, e.g. double core
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)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は各種液体の検知用として注目されている偏心コ
ア先ファイバを得るための偏心コア先ファイバ用母材を
効率よ（、生産性を高めて製造できる方法に関する。Detailed Description of the Invention "Field of Industrial Application" The present invention is aimed at improving the efficiency (and productivity) of a base material for eccentric core fibers, which are attracting attention for use in detecting various liquids. It relates to a method that can be manufactured with increased production.
「従来の技術」
従来、偏心コア光ファイバ用母材を！２遺す乙には、先
ず通常のＶＡＤ法等によって、第５図に示すように、中
心部のコア部ｌと、これを囲むクラッド部２からなる通
常の母材３をつくり、これから、図中破線で示した部分
の内部をくり抜いたり、或いはえ１線で示した部分４を
削り落すなどして第６図に示すようなコア部１が偏心し
た偏心コア光ファイバ用母材５を製造している。そして
、この偏心コア光ファイバ用母材５を線引きして、偏心
コア光ファイバが作製される。"Conventional technology" Conventional base material for eccentric core optical fiber! 2. First, as shown in Fig. 5, a normal base material 3 consisting of a core part 1 at the center and a cladding part 2 surrounding it is made by the usual VAD method etc., and from this, as shown in the figure. A base material 5 for an eccentric core optical fiber in which the core portion 1 is eccentric as shown in FIG. 6 is manufactured by hollowing out the inside of the portion shown by the broken line or by scraping off the portion 4 shown by the line 1. ing. Then, this eccentric core optical fiber preform 5 is drawn to produce an eccentric core optical fiber.
「発明が解決しようとする課題」
しかしながら、上記方法において斜線で示した部分４は
、偏心コア先ファイバ用母材５（以下１才材という）に
使用されない無駄な部分となり、通常の母材３のクラッ
ド部２の約７０％が製品に含まれない。``Problems to be Solved by the Invention'' However, in the above method, the shaded portion 4 becomes a wasted portion that is not used for the preform 5 for the eccentric core end fiber (hereinafter referred to as the preform 5), and is not used for the normal preform 3. Approximately 70% of the cladding portion 2 is not included in the product.
本発明者らはクラッド部の材料を有効に＋り川すべく鋭
意検討した結果、クラッド部に？ｕｖ！Ｉのコア部を間
隔をおいて設け、このコア部が（）；Ｊ心した位置とな
るように母材を（り抜けば、コア部数と同数のｆ１材が
得られると考えた。The inventors of the present invention have conducted intensive studies to effectively improve the material of the cladding. uv! It was thought that the same number of f1 materials as the number of core parts could be obtained by providing the core parts of I at intervals and cutting through the base material so that the core parts were located at the center of (); J.
本発明は、上記の考えに基づいてなされたしので、材料
の使用効率がよく、生産性の高い、１゛Ｉ材のｉ！ｉ２
１’；ａ方法を提供することを目的とする。The present invention has been made based on the above idea, and therefore, the i! i2
1';a method.
「課題を解決するための手段」
上記の目的を達成するため、本発明に係る母材の製造方
法においては、ｍ数のコア部が間隔をおいて設けられた
出発母材を作り、この出発母材から、それぞれコア部が
偏心して設けられた偏心コア光ファイバ用母材を採取す
る。"Means for Solving the Problem" In order to achieve the above object, in the method for manufacturing a base material according to the present invention, a starting base material in which m number of core parts are provided at intervals is produced, and the starting base material is Preforms for eccentric core optical fibers each having an eccentric core portion are collected from the preform.
１作用」
本発明は上記の構成となっているので、出発ＩＱ材のク
ラッド部を使用する割合が向上する。1. Since the present invention has the above-described structure, the ratio of use of the cladding portion of the starting IQ material is improved.
「実施例Ｊ
第１図および第２図は、本発明に係る母材の製造方法の
一実施例を示すもので、図中符号１１は、母材５の基と
なる出発母材である。Example J FIGS. 1 and 2 show an example of the method for manufacturing a base material according to the present invention, and reference numeral 11 in the figure is a starting base material that is the basis of the base material 5.
出発母材１１の中心を重心位置とする正三角形頂点位置
には、３個のコア部ｌがそれぞれ設けられている。した
がって、これらコア部ｌの一つを偏心コア部とする母材
５を採取することによって、３個の母材５がｉすられる
。この場合無駄となる出発母材１１のクラッド部２は、
図中斜線で示した部分４゛で示される約３５％となり、
格段に減少する。Three core portions l are provided at the apex positions of an equilateral triangle whose center of gravity is the center of the starting base material 11, respectively. Therefore, by collecting the base material 5 having one of these core portions l as an eccentric core portion, three base materials 5 are prepared. In this case, the cladding part 2 of the starting base material 11 that is wasted is
It is approximately 35%, which is indicated by the shaded area 4゛ in the figure.
significantly reduced.
上記出発母材１１は、例えば次のようにしてつくられる
。The starting base material 11 is produced, for example, as follows.
すなわち、第３図に示すように肉厚の石英管１２の内部
に所定の径のコア部ｌと任意の径のクラッド部６とを有
する、ＶＡＤ法等によってつくられる通常の母材７を３
本挿入し、さらにこれらの空部に上記コア部ｌが石英管
１２の中心に、重心が一致する正三角形の頂点に位置す
るように、細い径の石英棒１３・・・を満して固定する
。この際、石英管【２および石英棒１３の屈折率は、通
常の１０材７のクラッド部６の屈折率と等しくされる。That is, as shown in FIG. 3, a normal base material 7 made by the VAD method etc., which has a core portion l of a predetermined diameter and a cladding portion 6 of an arbitrary diameter inside a thick-walled quartz tube 12, is
Insert the quartz rods 13 with a small diameter into these hollow spaces, and fix them so that the core part l is located at the center of the quartz tube 12 and at the apex of an equilateral triangle whose center of gravity coincides. do. At this time, the refractive index of the quartz tube [2 and the quartz rod 13 is made equal to the refractive index of the cladding part 6 of the normal 10 material 7.
これを加熱溶融して一体化することによって第１図に示
す出発母材１１が得られる。The starting base material 11 shown in FIG. 1 is obtained by heating, melting, and integrating the materials.
なお、上記説明は、コア部の数を３本としたが、これに
制限されるものでなく、２本または４本等としてもよい
。その場合２本ではクラッド部２の無駄となる割合は、
約５０％、４本では約３０％となる。In the above description, the number of core portions is three, but the number is not limited to this, and may be two, four, or the like. In that case, the percentage of wasted cladding part 2 with two pieces is:
About 50%, and about 30% for 4 pieces.
また、上記説明では肉厚の石英管１２の内部に通常の母
材７を挿入したが、太い石英棒の周囲に通常の母材およ
び細い石英棒を配置して溶融し、第４図に示すようなコ
ア部ｌが外周に近接して配置された出発ｆす材１４をつ
くり、これから母材５を採取してもよい。In addition, in the above explanation, the normal base material 7 was inserted inside the thick-walled quartz tube 12, but the normal base material and the thin quartz rod were placed around the thick quartz rod and melted, as shown in FIG. A starting material 14 having such a core portion l disposed close to the outer periphery may be prepared, and the base material 5 may be collected from this material.
「発明の効果」
以上述べたように、本発明の偏心コア光ファイバ母材の
製造方法は、材料の無駄になる割合を大幅に減少し、生
産効率を高くすることが出来る優れた方法である。"Effects of the Invention" As described above, the method for manufacturing an eccentric core optical fiber preform of the present invention is an excellent method that can significantly reduce the proportion of wasted material and increase production efficiency. .
４、図面のｌｉｌ’ｉｆμな説明
第１図および第２図は本発明に係る偏心コア光ファイバ
母材の’Ｉｉ２遣方法の一実施例を示すもので、第１図
は出発母材の図、第２図は出発母材から偏心コア先ファ
イバ用母材を抜き取る位置的関係を示す図、第３図は基
母材の製造方法の一例を示す図、第４図は出発母材から
偏心コア光ファイバ母材を抜き取る池の位置的関係を示
す図、第５図は従来の通常のｔｙ材から偏心コア先ファ
イバｔｙ材を製造する説明図、第６図は偏心コア光ファ
イバ用母材の図である。4. A lil'ifμ explanation of the drawings FIGS. 1 and 2 show an example of the method for producing an eccentric core optical fiber preform according to the present invention, and FIG. 1 is a diagram of the starting preform. , Figure 2 is a diagram showing the positional relationship in which the eccentric core destination fiber base material is extracted from the starting base material, Figure 3 is a diagram showing an example of the method for manufacturing the base material, and Figure 4 is a diagram showing the positional relationship in which the eccentric core destination fiber base material is extracted from the starting base material. A diagram showing the positional relationship of the ponds from which the core optical fiber preform is extracted. Fig. 5 is an explanatory diagram of manufacturing an eccentric core end fiber TY material from a conventional normal TY material. Fig. 6 is a preform for eccentric core optical fiber. This is a diagram.
ｌ・・・・・・コア部、２・・・・・・クラッド部、３
・・・・・・通常の母材、４，４゛・・・・・・斜線部
分、５・・・・・・偏心コア光ファイバ母材（母材〉、
６・・・・・・任意の径のクラッド部、７・・・・・・
通常の母材、１１・・・・・・出発母材、１２・・・・
・・石英管、１３・・・・・・石英棒、１４・・・・・
・出発母材。l... Core part, 2... Clad part, 3
・・・・・・Normal base material, 4,4゛・・・Shaded area, 5・・・・・・Eccentric core optical fiber base material (base material),
6...Clad part of arbitrary diameter, 7...
Normal base material, 11... Starting base material, 12...
...Quartz tube, 13...Quartz rod, 14...
・Starting base material.
Claims (1)
、この出発母材から、それぞれコア部が偏心して設けら
れた偏心コア光ファイバ用母材を採取することを特徴と
する偏心コア光ファイバ用母材の製造方法。An eccentric core characterized in that a starting preform in which a plurality of core portions are provided at intervals is prepared, and a preform for an eccentric core optical fiber in which each core portion is provided eccentrically is extracted from this starting preform. A method of manufacturing a base material for optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1279453A JPH03141132A (en) | 1989-10-26 | 1989-10-26 | Production of matrix for optical fiber with eccentric core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1279453A JPH03141132A (en) | 1989-10-26 | 1989-10-26 | Production of matrix for optical fiber with eccentric core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03141132A true JPH03141132A (en) | 1991-06-17 |
Family
ID=17611278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1279453A Pending JPH03141132A (en) | 1989-10-26 | 1989-10-26 | Production of matrix for optical fiber with eccentric core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03141132A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003104155A1 (en) * | 2002-06-07 | 2003-12-18 | Cidra Corporation | Method for making a multicolor large diameter optical fiber waveguide |
| WO2004072991A1 (en) * | 2003-02-14 | 2004-08-26 | Ls Cable Ltd. | Loose tube optical cable having straight aggregation structure |
-
1989
- 1989-10-26 JP JP1279453A patent/JPH03141132A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003104155A1 (en) * | 2002-06-07 | 2003-12-18 | Cidra Corporation | Method for making a multicolor large diameter optical fiber waveguide |
| US8769995B2 (en) | 2002-06-07 | 2014-07-08 | Weatherford/Lamb, Inc. | Method for making large diameter multicore optical waveguide |
| WO2004072991A1 (en) * | 2003-02-14 | 2004-08-26 | Ls Cable Ltd. | Loose tube optical cable having straight aggregation structure |
| CN100347793C (en) * | 2003-02-14 | 2007-11-07 | Lg电线有限公司 | Loose tube optical cable having straight aggregation structure |
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