JP2000128560A - Burner for processing optical fiber preform - Google Patents
Burner for processing optical fiber preformInfo
- Publication number
- JP2000128560A JP2000128560A JP10301975A JP30197598A JP2000128560A JP 2000128560 A JP2000128560 A JP 2000128560A JP 10301975 A JP10301975 A JP 10301975A JP 30197598 A JP30197598 A JP 30197598A JP 2000128560 A JP2000128560 A JP 2000128560A
- Authority
- JP
- Japan
- Prior art keywords
- burner
- preform
- top end
- gold
- optical fiber
- 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
-
- 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
- C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
- C03B37/0124—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光ファイバプリフ
ォームを加工する際に使用される光ファイバプリフォー
ム加工用バーナに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber preform processing burner used for processing an optical fiber preform.
【０００２】[0002]
【従来の技術】光ファイバプリフォーム（以下、単にプ
リフォームという）は、スートプリフォームを塩素系ガ
ス雰囲気中で脱水し、さらに透明なガラスになるまで、
不活性ガス雰囲気中で焼結して製造される。その際、プ
リフォームは、通常、ガラス旋盤を用いて、バーナで加
熱しながら延伸することにより、線引きに都合のよい直
径、形状に加工される。そして、このプリフォームの加
工においては、通常、ステンレス製等からなる金属バー
ナが使用されている。2. Description of the Related Art An optical fiber preform (hereinafter, simply referred to as a preform) is a soot preform that is dehydrated in a chlorine-based gas atmosphere until it becomes transparent glass.
It is manufactured by sintering in an inert gas atmosphere. At this time, the preform is usually processed into a diameter and a shape convenient for drawing by stretching while heating with a burner using a glass lathe. In processing the preform, a metal burner made of stainless steel or the like is usually used.
【０００３】[0003]
【発明が解決しようとする課題】上記のようにプリフォ
ームを加工する場合、使用されるバーナの先端部温度は
４００〜７００℃の高温になる。そのため、バーナの材
質として、ステンレス等を使用していても、バーナの先
端部が酸化し、この酸化により生じた酸化物が、プリフ
ォームに付着するという弊害が生じた。そこで、この酸
化物を除去するため、プリフォームの表層部をヤスリ等
で削り取る必要があった。しかしながら、酸化物を除去
することは作業的に困難であり、また、プリフォームの
表層部を削り取ると、その部分でクラッド部とコア部の
比率が変わるため光伝送特性の不良を招くこととなっ
た。そこで、本発明は、プリフォームに金属バーナの酸
化物が付着しないように改良した光ファイバプリフォー
ム加工用バーナの提供を課題とする。When the preform is processed as described above, the temperature at the tip of the burner used is as high as 400 to 700 ° C. For this reason, even if stainless steel or the like is used as the material of the burner, the tip of the burner is oxidized, and the oxide generated by this oxidation adheres to the preform. Therefore, in order to remove this oxide, it was necessary to scrape the surface layer of the preform with a file or the like. However, it is difficult to remove the oxides in terms of work, and if the surface layer of the preform is shaved, the ratio of the clad portion to the core portion changes at that portion, resulting in poor optical transmission characteristics. Was. Therefore, an object of the present invention is to provide a burner for processing an optical fiber preform, which is improved so that an oxide of a metal burner does not adhere to the preform.
【０００４】[0004]
【課題を解決するための手段】本発明者は、上記課題を
解決するために鋭意検討した結果、バーナの表面をメッ
キすればよいことを見出し、好適なメッキ原料等につい
て各種研究することにより、本発明を完成するに至っ
た。すなわち、本発明は、光ファイバプリフォーム加工
用バーナにおいて、少なくともその先端部に金メッキを
施してなることを特徴とする光ファイバプリフォーム加
工用バーナである。Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventor found that the surface of the burner should be plated, and by conducting various studies on suitable plating raw materials and the like, The present invention has been completed. That is, the present invention is a burner for processing an optical fiber preform, characterized in that at least the end portion of the burner for processing an optical fiber preform is plated with gold.
【０００５】[0005]
【発明の実施の形態】本発明の特徴は、上記したよう
に、プリフォームを加工する場合において、使用する光
ファイバプリフォーム加工用バーナの少なくとも先端部
に金メッキを施した点にある。このように、ステンレス
等からなるバーナを金メッキして被覆することによりバ
ーナの先端部温度が４００〜７００℃と高温になって
も、バーナの先端部には加熱による酸化物が生じなくな
る。バーナへの金メッキは、電気メッキ法、蒸着メッキ
法等の方法を利用して、少なくともバーナの先端部に施
せばよい。また、金メッキの厚さは、バーナの先端部温
度等を考慮して適宜、決定すればよい。DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, the feature of the present invention resides in that, at the time of processing a preform, at least the tip of the burner for processing an optical fiber preform used is gold-plated. As described above, even if the temperature of the tip of the burner becomes as high as 400 to 700 ° C. by coating the burner made of stainless steel or the like by gold plating, no oxide is generated at the tip of the burner by heating. Gold plating on the burner may be performed at least on the tip of the burner by using a method such as an electroplating method or a vapor deposition plating method. Further, the thickness of the gold plating may be appropriately determined in consideration of the temperature at the tip of the burner and the like.
【０００６】[0006]
【実施例】次に、実施例によって本発明をさらに詳細に
説明するが、本発明はこれに限定されるものではない。Next, the present invention will be described in more detail by way of examples, but the present invention is not limited to these examples.
【０００７】（実施例、比較例）外径６０ｍｍのプリフ
ォームをガラス旋盤の両チャック間にセットし、燃焼ガ
スに水素、助燃ガスに酸素を用い、バーナで絞り形状加
工を行った。このバーナには、水素ガス吹き出し口の内
径３０ｍｍφで、この水素ガス吹き出し口の中に、内径
１ｍｍφ、外径３ｍｍφの酸素配給管６３本が同心状に
設けられ、先端部に金メッキを施したステンレス製のバ
ーナを使用し、比較例として、先端部に金メッキを施し
ていないバーナを使用した。本発明のバーナを使用して
加工したプリフォームと金メッキを施していない従来の
バーナを使用して加工したプリフォームの異物付着率を
それぞれ求めたところ、本発明の場合は０．２％で、金
属酸化物以外のゴミの付着だけが認められたのに対し、
従来のバーナの場合は１５％で、金属酸化物の付着が多
いという結果が得られた。すなわち、本発明によれば異
物の付着が著しく少なくなることが確認された。(Example, Comparative Example) A preform having an outer diameter of 60 mm was set between both chucks of a glass lathe, and hydrogen was used as a combustion gas, oxygen was used as a combustion supporting gas, and drawing was performed by a burner. This burner has a hydrogen gas outlet with an inner diameter of 30 mmφ, and in the hydrogen gas outlet, 63 oxygen supply pipes having an inner diameter of 1 mmφ and an outer diameter of 3 mmφ are provided concentrically, and a gold-plated stainless steel tip is provided. As a comparative example, a burner having no gold-plated tip was used. The foreign matter adhesion rate of the preform processed by using the burner of the present invention and the preform processed by using the conventional burner not subjected to gold plating were respectively obtained. In the case of the present invention, 0.2% was obtained. While only dust other than metal oxides was observed,
In the case of the conventional burner, the result was 15%, indicating that a large amount of metal oxide was attached. That is, according to the present invention, it was confirmed that adhesion of foreign matter was significantly reduced.
【０００８】[0008]
【発明の効果】本発明によれば、バーナの加熱で生じる
金属酸化物の発生を抑制することができ、光ファイバプ
リフォームに付着する金属酸化物の量を著しく低減させ
ることができる。According to the present invention, the generation of metal oxides caused by heating the burner can be suppressed, and the amount of metal oxides adhering to the optical fiber preform can be significantly reduced.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 島田 忠克 群馬県安中市磯部２丁目13番１号 信越化 学工業株式会社精密機能材料研究所内 (72)発明者 平沢 秀夫 群馬県安中市磯部２丁目13番１号 信越化 学工業株式会社精密機能材料研究所内 Ｆターム(参考） 3K017 CA09 CB02 CG01 CH02 4G021 BA00 MA02 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tadakatsu Shimada 2-3-1-1, Isobe, Annaka-shi, Gunma Shin-Etsu Kagaku Kogyo Co., Ltd. Precision Functional Materials Research Laboratories (72) Inventor Hideo Hirasawa Isobe, Annaka-shi, Gunma 2-13-1 Shin-Etsu Kagaku Kogyo Co., Ltd. Precision Functional Materials Laboratory F-term (reference) 3K017 CA09 CB02 CG01 CH02 4G021 BA00 MA02
Claims (1)
おいて、少なくともその先端部に金メッキを施してなる
ことを特徴とする光ファイバプリフォーム加工用バー
ナ。1. A burner for processing an optical fiber preform, wherein at least a tip portion of the burner is processed with gold plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10301975A JP2000128560A (en) | 1998-10-23 | 1998-10-23 | Burner for processing optical fiber preform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10301975A JP2000128560A (en) | 1998-10-23 | 1998-10-23 | Burner for processing optical fiber preform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000128560A true JP2000128560A (en) | 2000-05-09 |
Family
ID=17903390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10301975A Pending JP2000128560A (en) | 1998-10-23 | 1998-10-23 | Burner for processing optical fiber preform |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000128560A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170059154A1 (en) * | 2015-08-27 | 2017-03-02 | Johns Manville | Burner panels including dry-tip burners, submerged combustion melters, and methods |
-
1998
- 1998-10-23 JP JP10301975A patent/JP2000128560A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170059154A1 (en) * | 2015-08-27 | 2017-03-02 | Johns Manville | Burner panels including dry-tip burners, submerged combustion melters, and methods |
| US10041666B2 (en) * | 2015-08-27 | 2018-08-07 | Johns Manville | Burner panels including dry-tip burners, submerged combustion melters, and methods |
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