JP2006169049A - Method for drawing optical fiber preform, and quartz dummy rod used therefor - Google Patents

Method for drawing optical fiber preform, and quartz dummy rod used therefor Download PDF

Info

Publication number
JP2006169049A
JP2006169049A JP2004364662A JP2004364662A JP2006169049A JP 2006169049 A JP2006169049 A JP 2006169049A JP 2004364662 A JP2004364662 A JP 2004364662A JP 2004364662 A JP2004364662 A JP 2004364662A JP 2006169049 A JP2006169049 A JP 2006169049A
Authority
JP
Japan
Prior art keywords
optical fiber
fiber preform
quartz
quartz dummy
dummy rod
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
Application number
JP2004364662A
Other languages
Japanese (ja)
Other versions
JP4395061B2 (en
Inventor
Shoji Hoshino
昇次 星野
Takashi Koshitani
隆 越谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shin Etsu Chemical Co Ltd
Original Assignee
Shin Etsu Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shin Etsu Chemical Co Ltd filed Critical Shin Etsu Chemical Co Ltd
Priority to JP2004364662A priority Critical patent/JP4395061B2/en
Priority to PCT/JP2005/019230 priority patent/WO2006064608A1/en
Priority to TW094137435A priority patent/TW200624398A/en
Publication of JP2006169049A publication Critical patent/JP2006169049A/en
Application granted granted Critical
Publication of JP4395061B2 publication Critical patent/JP4395061B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • C03B37/0126—Means for supporting, rotating, translating the rod, tube or preform

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for drawing an optical fiber preform, by which the preform can be drawn with a uniform diameter in a longitudinal direction without causing sliding at a grasping part of a chuck mechanism when the optical fiber preform is drawn by using a glass lathe, and to provide a quartz dummy rod used therefor. <P>SOLUTION: In the method for drawing the preform into a prescribed diameter while heating and melting it by attaching the optical fiber preform to the glass lathe, quartz dummy rods each having a coarse surface part formed by grinding respective surfaces are connected to both ends of the optical fiber preform, and drawing processing is performed while grasping the coarse surface parts with chuck mechanisms. It is preferable that the average surface roughness of the coarse surface part of each quartz dummy rod is ≤50 μm. As the quartz dummy rod, a rod obtained by grinding the end part of a quartz glass rod changing in diameter in the longitudinal direction to form a straight body part can be also used. It is preferable that the coarse surface part is formed in this straight body part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、大型の光ファイバ母材を延伸してより細径のガラスロッドに縮径する光ファイバ母材の延伸方法及びこれに用いる石英ダミー棒に係り、特には、光ファイバ母材の延伸に最適な把持方法に関する。   The present invention relates to an optical fiber preform stretching method for stretching a large optical fiber preform to reduce the diameter of the optical fiber preform to a smaller glass rod, and a quartz dummy rod used therefor, and in particular, stretching of an optical fiber preform. It is related with the most suitable gripping method.

光ファイバ母材は、ＯＶＤ法等で合成されたガラス微粒子（スート）を堆積して得た多孔質ガラス母材を脱水、焼結することで製造される。このようにして製造される光ファイバ母材の直径は通常１１０〜２００ｍｍであるが、これは熱源として電気炉を備えた延伸装置で一次延伸される。一次延伸された光ファイバ母材は、さらに、酸水素火炎で二次延伸して、光ファイバの線引きに適した直径３０〜８０ｍｍに縮径されプリフォームとされる。   The optical fiber preform is manufactured by dehydrating and sintering a porous glass preform obtained by depositing glass fine particles (soot) synthesized by the OVD method or the like. The diameter of the optical fiber preform manufactured in this way is usually 110 to 200 mm, and this is primarily stretched by a stretching apparatus equipped with an electric furnace as a heat source. The optical fiber preform subjected to primary stretching is further subjected to secondary stretching with an oxyhydrogen flame, and the diameter is reduced to a diameter of 30 to 80 mm suitable for drawing an optical fiber to be a preform.

一次延伸された光ファイバ母材及びプリフォームは、その長手方向に径変動が少ないことが要求される。
しかしながら、従来の方法では長手方向に径変動を生じることがあり、その原因を調べたところ、光ファイバ母材の延伸中にチャックの把持部で滑りを生じているものがあった。 The optical fiber preform and preform that have been primarily stretched are required to have little diameter variation in the longitudinal direction.
However, in the conventional method, the diameter may be varied in the longitudinal direction, and the cause of the variation was investigated. As a result, there was a case where slipping occurred at the grip portion of the chuck during the drawing of the optical fiber preform.

図１に、ガラス旋盤を用いて光ファイバ母材を延伸する様子を示した。光ファイバ母材１の両端には、石英ダミー棒が溶着等で接続されており、この石英ダミー棒の部分でガラス旋盤のチャック２，３に取り付けられている。なお、符号４は加熱源としてのバーナーであり、符号５は外径測定器である。   FIG. 1 shows how an optical fiber preform is drawn using a glass lathe. A quartz dummy rod is connected to both ends of the optical fiber preform 1 by welding or the like, and the quartz dummy rod is attached to the chucks 2 and 3 of the glass lathe. In addition, the code | symbol 4 is a burner as a heating source, and the code | symbol 5 is an outer diameter measuring device.

ガラス旋盤を用いる一次延伸では、重く太径のものを水平に保持して延伸するため、加熱溶融は曲りや変形を生じない程度とし、最低限の加熱溶融で延伸する必要がある。そのため、延伸には極めて大きな力が必要とされる。   In primary stretching using a glass lathe, a heavy and large-diameter material is stretched while being held in a horizontal position. Therefore, heating and melting should be performed to such an extent that bending and deformation do not occur, and stretching must be performed with a minimum of heating and melting. Therefore, extremely large force is required for stretching.

従来、光ファイバ母材１に接続された石英ダミー棒の表面は、滑らかで滑りやすかったり凸凹していたため、石英ダミー棒を把持する旋盤のチャック２，３に十分な把持力がないと、図２に示すように、把持しているチャックに滑りが生じ、延伸速度が制御できなくなり、プリフォームの外径を一定に保つことができなくなることが分かった。
このような滑りを防ぐため、必要以上に大きな力で把持すると、光ファイバ母材１の表面にクラックが発生することがあり、得られるプリフォームの品質及び生産性に悪影響を与える。 Conventionally, the surface of the quartz dummy rod connected to the optical fiber preform 1 has been smooth, slippery, or uneven, and therefore the lathe chucks 2 and 3 that hold the quartz dummy rod have no sufficient gripping force. As shown in FIG. 2, it was found that the gripping chuck slipped, the stretching speed could not be controlled, and the outer diameter of the preform could not be kept constant.
In order to prevent such slipping, if it is gripped with a force larger than necessary, the surface of the optical fiber preform 1 may be cracked, which adversely affects the quality and productivity of the resulting preform.

本発明は、上記課題に鑑み、ガラス旋盤を用いて光ファイバ母材を延伸する際、チャック機構の把持部で滑りが生じることなく、長手方向に均一な径で延伸することができる光ファイバ母材の延伸方法及びこれに用いる石英ダミー棒を提供することを目的としている。   In view of the above problems, the present invention provides an optical fiber preform that can be stretched with a uniform diameter in the longitudinal direction without causing slippage in the gripping portion of the chuck mechanism when the optical fiber preform is stretched using a glass lathe. It aims at providing the extending | stretching method of a material, and the quartz dummy rod used for this.

本発明の光ファイバ母材の延伸方法は、ガラス旋盤に光ファイバ母材を取り付け、加熱溶融して所定の径に延伸加工する方法において、該光ファイバ母材の両端に、表面を研削して粗面部を設けた石英ダミー棒を接続し、該粗面部をチャック機構で把持して延伸加工することを特徴としている。なお、石英ダミー棒の粗面部の平均表面粗さは、５０μｍ以下とするのが好ましい。また、石英ダミー棒として、長手方向に径が変化している石英ガラスロッドの端部を研削して直胴部を設けたものも使用することができ、この直胴部に前記粗面部を設けるのが好ましい。   The optical fiber preform stretching method of the present invention is a method in which an optical fiber preform is attached to a glass lathe, heated and melted and stretched to a predetermined diameter, and surfaces of both ends of the optical fiber preform are ground. A quartz dummy rod provided with a rough surface portion is connected, and the rough surface portion is gripped by a chuck mechanism and stretched. The average surface roughness of the rough surface portion of the quartz dummy rod is preferably 50 μm or less. Further, as a quartz dummy rod, a quartz glass rod whose diameter is changed in the longitudinal direction and whose end portion is ground by providing a straight body portion can be used, and the rough surface portion is provided on the straight body portion. Is preferred.

本発明の延伸方法で用いる石英ダミー棒は、ガラス旋盤に光ファイバ母材を取り付け、加熱溶融して光ファイバ母材を所定の径に延伸加工するに際し、該光ファイバ母材の両端に接続される石英ダミー棒が、チャック機構で把持するための粗面部が研削により設けられていることを特徴としており、石英ダミー棒の粗面部の平均表面粗さは、５０μｍ以下とするのが好ましい。また、石英ダミー棒として、長手方向に径が変化している石英ガラスロッドの端部を研削して直胴部を設けたものも使用することができ、この直胴部に前記粗面部を設けるのが好ましい。   The quartz dummy rod used in the drawing method of the present invention is connected to both ends of an optical fiber preform when an optical fiber preform is attached to a glass lathe and heated and melted to draw the optical fiber preform to a predetermined diameter. The quartz dummy rod is characterized in that a rough surface portion for gripping with a chuck mechanism is provided by grinding, and the average surface roughness of the rough surface portion of the quartz dummy rod is preferably 50 μm or less. Further, as a quartz dummy rod, a quartz glass rod whose diameter is changed in the longitudinal direction and whose end portion is ground by providing a straight body portion can be used, and the rough surface portion is provided on the straight body portion. Is preferred.

本発明によれば、光ファイバ母材の延伸時において、把持部での滑りが防止され、延伸速度を精密に制御することができ、長手方向に均一な径を有する光ファイバ母材乃至プリフォームが得られる。また、石英ダミー棒として、長手方向に径が変化している石英ガラスロッドを使用することもでき、製造コストの低減に寄与する。   According to the present invention, when the optical fiber preform is stretched, slipping at the grip portion is prevented, the stretching speed can be precisely controlled, and the optical fiber preform or preform having a uniform diameter in the longitudinal direction. Is obtained. Further, a quartz glass rod having a diameter changing in the longitudinal direction can be used as the quartz dummy rod, which contributes to a reduction in manufacturing cost.

以下、本発明の実施の形態について添付した図面に基づき具体的に説明するが、本発明はこれに限定されるものではない。
図３（ａ）〜（ｃ）は、本発明の把持方法を説明する概略図であり、（ａ）は、長手方向に径変動のない石英ダミー棒に粗面部を形成した例であり、（ｂ）は、長手方向に径が変化している石英ダミー棒に粗面部を形成した例を示している。（ｃ）は、形成した粗面部をチャック機構のチャックで把持した状態を示している。 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited thereto.
FIGS. 3A to 3C are schematic diagrams for explaining the gripping method of the present invention, and FIG. 3A is an example in which a rough surface portion is formed on a quartz dummy rod having no diameter variation in the longitudinal direction. b) shows an example in which a rough surface portion is formed on a quartz dummy rod whose diameter changes in the longitudinal direction. (C) has shown the state which gripped the formed rough surface part with the chuck | zipper of the chuck mechanism.

延伸は、光ファイバ母材を回転させながら行われるため、光ファイバ母材と石英ダミー棒とはそれぞれの中心軸線が一致して接続されている必要がある。中心軸線がずれていると、光ファイバ母材の回転に振れ回りを生じ、延伸外径が変動することになる。そのため、チャックの把持部となる粗面部を形成する際には、石英ダミー棒の中心軸に粗面部の中心軸が一致するように研削加工するのが望ましい。   Since the drawing is performed while rotating the optical fiber preform, it is necessary that the optical fiber preform and the quartz dummy rod are connected so that their respective central axes coincide with each other. If the center axis is deviated, the rotation of the optical fiber preform will sway, and the stretched outer diameter will fluctuate. Therefore, when forming the rough surface portion to be the grip portion of the chuck, it is desirable to perform grinding so that the central axis of the rough surface portion coincides with the central axis of the quartz dummy rod.

研削加工は、例えば、＃６０〜＃１４０のダイヤモンドホイールを用いて円筒研削することにより、石英ダミー棒の表面に、平均表面粗さ５０μｍ以下の粗面部を形成することができる。粗面部の平均表面粗さがこの範囲から外れると、所望の効果が得られず、チャックで滑りを生じる。
なお、光ファイバ母材を把持するチャックの把持面は、光ファイバ母材の周面とほぼ同曲率面とするのが望ましい。これによって光ファイバ母材との接触面積を増すことができ、より確実に把持することができる。 In the grinding process, for example, a rough surface portion having an average surface roughness of 50 μm or less can be formed on the surface of the quartz dummy bar by cylindrical grinding using a diamond wheel of # 60 to # 140. If the average surface roughness of the rough surface portion is out of this range, the desired effect cannot be obtained, and the chuck slips.
It is desirable that the gripping surface of the chuck that grips the optical fiber preform has a substantially same curvature surface as the peripheral surface of the optical fiber preform. As a result, the contact area with the optical fiber preform can be increased and gripping can be performed more reliably.

また、石英ダミー棒として、長手方向に径が変化している石英ガラスロッドを使用することもでき、この石英ガラスロッドの端部を研削して直胴部を設け、この直胴部に粗面部を設けることで石英ダミー棒として活用することができ、製造コストを低減することができる。   In addition, a quartz glass rod whose diameter changes in the longitudinal direction can be used as a quartz dummy rod, and the end portion of this quartz glass rod is ground to provide a straight body portion, and a rough surface portion is provided on the straight body portion. By providing this, it can be used as a quartz dummy rod, and the manufacturing cost can be reduced.

（実施例１）
ＶＡＤ法でスートを堆積して得た多孔質ガラス母材を脱水、焼結して、外径１１０ｍｍ、直胴部の長さが１,０００ｍｍの光ファイバ母材を製作した。この光ファイバ母材の両端に、直径６０ｍｍφ、長さ４００ｍｍの石英ダミー棒を溶着し、ガラス旋盤に取付け、酸水素バーナ火炎で加熱溶融し、平均延伸速度１３ｍｍ／ｍｉｎで延伸して直径８５ｍｍφに縮径した。なお、石英ダミー棒には、＃１００のダイヤモンドホイールを用いた円筒研削で平均表面粗さ２５μｍの粗面部が設けられている。
縮径された光ファイバ母材の長手方向への径変動を調べたところ、不良品の発生率が低減され、品質的にも安定していた。 Example 1
A porous glass preform obtained by depositing soot by the VAD method was dehydrated and sintered to produce an optical fiber preform having an outer diameter of 110 mm and a length of the straight barrel of 1,000 mm. A quartz dummy rod having a diameter of 60 mmφ and a length of 400 mm is welded to both ends of this optical fiber preform, attached to a glass lathe, heated and melted with an oxyhydrogen burner flame, and drawn at an average drawing speed of 13 mm / min to a diameter of 85 mmφ. The diameter was reduced. The quartz dummy bar is provided with a rough surface portion having an average surface roughness of 25 μm by cylindrical grinding using a # 100 diamond wheel.
When the diameter variation in the longitudinal direction of the reduced optical fiber preform was examined, the occurrence rate of defective products was reduced and the quality was stable.

（実施例２）
ＶＡＤ法でスートを堆積して得た多孔質ガラス母材を脱水、焼結して、外径１１０ｍｍ、直胴部の長さが１,０００ｍｍの光ファイバ母材を製作した。次に、直胴部の長さ１００ｍｍで、直径が６０ｍｍφから５５ｍｍφへと次第に径が小さくなっているテーパー形状を有する石英ガラスロッドを用意して石英ダミー棒とし、この直胴部に、＃１００のダイヤモンドホイールを用いた円筒研削で平均表面粗さ２５μｍの粗面部を設けた。この石英ダミー棒をその細径側で光ファイバ母材の両端にそれぞれ溶着してガラス旋盤に取付け、酸水素バーナ火炎で加熱溶融し、平均延伸速度１３ｍｍ／ｍｉｎで延伸して直径８５ｍｍφに縮径した。
縮径された光ファイバ母材の長手方向への径変動を調べたところ、不良品の発生率が低減され、品質的にも安定していた。 (Example 2)
A porous glass preform obtained by depositing soot by the VAD method was dehydrated and sintered to produce an optical fiber preform having an outer diameter of 110 mm and a length of the straight barrel of 1,000 mm. Next, a quartz glass rod having a taper shape with a straight body portion length of 100 mm and a diameter gradually decreasing from 60 mmφ to 55 mmφ is prepared as a quartz dummy rod. A rough surface portion having an average surface roughness of 25 μm was provided by cylindrical grinding using a diamond wheel. The quartz dummy rods are welded to both ends of the optical fiber preform on the small diameter side, attached to a glass lathe, heated and melted with an oxyhydrogen burner flame, drawn at an average drawing speed of 13 mm / min, and reduced in diameter to 85 mmφ. did.
When the diameter variation in the longitudinal direction of the reduced optical fiber preform was examined, the occurrence rate of defective products was reduced and the quality was stable.

本発明によれば、長手方向に均一な径を有する光ファイバ母材乃至プリフォームが得られ、かつ製造コストの低減に寄与する。   According to the present invention, an optical fiber preform or preform having a uniform diameter in the longitudinal direction can be obtained, and the manufacturing cost can be reduced.

本発明のチャック機構を備えた光ファイバ母材の延伸装置の一例を示す概略構成図である。It is a schematic block diagram which shows an example of the drawing apparatus of the optical fiber preform provided with the chuck mechanism of the present invention. 従来の把持方法を説明する概略図である。It is the schematic explaining the conventional holding | grip method. （ａ）〜（ｃ）は、本発明の把持方法を説明する概略図であり、（ａ），（ｂ）は、石英ダミー棒に粗面部を形成する例を示し、（ｃ）は、形成した粗面部をチャック機構のチャックで把持した状態を示している。(A)-(c) is the schematic explaining the holding | grip method of this invention, (a), (b) shows the example which forms a rough surface part in a quartz dummy rod, (c) is formation A state where the rough surface portion is gripped by the chuck of the chuck mechanism is shown.

符号の説明Explanation of symbols

１…………光ファイバ母材、
２…………固定チャック、
３…………移動チャック、
４…………バーナー、
５…………外径測定器。 1 ………… Optical fiber preform,
2 ………… Fixed chuck,
3 ………… Movement chuck,
4 ... Burner,
5 ………… Outer diameter measuring instrument.

Claims (6)

ガラス旋盤に光ファイバ母材を取り付け、加熱溶融して所定の径に延伸加工する方法において、該光ファイバ母材の両端に、表面を研削して粗面部を設けた石英ダミー棒を接続し、該粗面部をチャック機構で把持して延伸加工することを特徴とする光ファイバ母材の延伸方法。 In a method of attaching an optical fiber base material to a glass lathe, heating and melting and stretching to a predetermined diameter, a quartz dummy rod provided with a rough surface portion by grinding the surface is connected to both ends of the optical fiber base material, An optical fiber preform stretching method, wherein the rough surface portion is gripped by a chuck mechanism and stretched. 前記粗面部の平均表面粗さが、５０μｍ以下である請求項１に記載の光ファイバ母材の延伸方法。 The method for stretching an optical fiber preform according to claim 1, wherein an average surface roughness of the rough surface portion is 50 μm or less. 前記石英ダミー棒が、長手方向に径が変化している石英ガラスロッドの端部を研削して直胴部を設けてなる請求項１又は２に記載の光ファイバ母材の延伸方法。 The method of drawing an optical fiber preform according to claim 1 or 2, wherein the quartz dummy rod is provided with a straight barrel portion by grinding an end portion of a quartz glass rod whose diameter changes in the longitudinal direction. ガラス旋盤に光ファイバ母材を取り付け、加熱溶融して光ファイバ母材を所定の径に延伸加工するに際し、該光ファイバ母材の両端に接続される石英ダミー棒が、チャック機構で把持するための粗面部が研削により設けられていることを特徴とする石英ダミー棒。 A quartz dummy rod connected to both ends of the optical fiber preform is gripped by the chuck mechanism when the optical fiber preform is attached to a glass lathe and heated and melted to draw the optical fiber preform to a predetermined diameter. A quartz dummy bar, wherein the rough surface portion is provided by grinding. 前記粗面部の平均表面粗さが、５０μｍ以下である請求項４に記載の石英ダミー棒。 The quartz dummy bar according to claim 4, wherein an average surface roughness of the rough surface portion is 50 μm or less. 前記石英ダミー棒が、長手方向に径が変化している石英ガラスロッドの端部を研削して直胴部を設けてなる請求項４又は５に記載の石英ダミー棒。

The quartz dummy rod according to claim 4 or 5, wherein the quartz dummy rod is provided with a straight body portion by grinding an end portion of a quartz glass rod whose diameter changes in the longitudinal direction.

JP2004364662A 2004-12-16 2004-12-16 Optical fiber preform stretching method and quartz dummy rod used therefor Active JP4395061B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2004364662A JP4395061B2 (en) 2004-12-16 2004-12-16 Optical fiber preform stretching method and quartz dummy rod used therefor
PCT/JP2005/019230 WO2006064608A1 (en) 2004-12-16 2005-10-19 Method for drawing parent material of optical fiber and quartz dummy rod
TW094137435A TW200624398A (en) 2004-12-16 2005-10-26 Optical fiber base material extension method and quratz dummy stick thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004364662A JP4395061B2 (en) 2004-12-16 2004-12-16 Optical fiber preform stretching method and quartz dummy rod used therefor

Publications (2)

Publication Number Publication Date
JP2006169049A true JP2006169049A (en) 2006-06-29
JP4395061B2 JP4395061B2 (en) 2010-01-06

Family

ID=36587672

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004364662A Active JP4395061B2 (en) 2004-12-16 2004-12-16 Optical fiber preform stretching method and quartz dummy rod used therefor

Country Status (3)

Country Link
JP (1) JP4395061B2 (en)
TW (1) TW200624398A (en)
WO (1) WO2006064608A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013159549A (en) * 2012-02-09 2013-08-19 Shin-Etsu Chemical Co Ltd Method of drawing optical fiber perform
JP2016222495A (en) * 2015-05-29 2016-12-28 株式会社フジクラ Dummy rod for optical fiber preform, drawing method of optical fiber preform using the dummy rod, and production method of optical fiber wire
CN114212989A (en) * 2021-11-30 2022-03-22 浙江富通光纤技术有限公司 Processing technology of prefabricated rod and optical fiber

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016118144A1 (en) 2015-01-22 2016-07-28 Heraeus Tenevo Llc Formation of elongated glass components with low bow using a gripper device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3198290B2 (en) * 1998-07-01 2001-08-13 信越化学工業株式会社 Processing method and processing apparatus for optical fiber preform
JP2001138112A (en) * 1999-11-17 2001-05-22 Kayaba Ind Co Ltd Method of treating surface of chuck member and surface structure therewith
JP2002037640A (en) * 2000-07-24 2002-02-06 Shin Etsu Chem Co Ltd Drawing machine of optical fiber base material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013159549A (en) * 2012-02-09 2013-08-19 Shin-Etsu Chemical Co Ltd Method of drawing optical fiber perform
JP2016222495A (en) * 2015-05-29 2016-12-28 株式会社フジクラ Dummy rod for optical fiber preform, drawing method of optical fiber preform using the dummy rod, and production method of optical fiber wire
CN114212989A (en) * 2021-11-30 2022-03-22 浙江富通光纤技术有限公司 Processing technology of prefabricated rod and optical fiber
CN114212989B (en) * 2021-11-30 2023-07-28 浙江富通光纤技术有限公司 Processing technology of preform and optical fiber

Also Published As

Publication number Publication date
JP4395061B2 (en) 2010-01-06
TW200624398A (en) 2006-07-16
WO2006064608A1 (en) 2006-06-22

Similar Documents

Publication Publication Date Title
JP5352231B2 (en) Method for producing a quartz glass tube by stretching a hollow cylinder of quartz glass
US20060174659A1 (en) method for production of an optical component made from quartz glass and hollow cylinder made from quartz glass for carrying out said method
EP1924431A2 (en) Fused silica body and thermal reflow of glass
KR20040077449A (en) Method and device for manufacturing glass tube
JP4395061B2 (en) Optical fiber preform stretching method and quartz dummy rod used therefor
JP4164655B2 (en) Glass rod cutting method and cutting device used therefor
JP2005272234A (en) Working method of glass preform for optical fiber and working device
JP2001122635A (en) Method for manufacturing optical fiber, method for manufacturing preform and apparatus for manufacturing the preform
JP2005263577A (en) Apparatus for manufacturing glass preform for optical fiber
JP3141546B2 (en) Drawing method and drawing apparatus for preform for optical fiber
JP6979000B2 (en) Manufacturing method of glass base material for optical fiber
JP2005263527A (en) Method and apparatus for manufacturing glass pipe
WO2004016556A1 (en) Method of producing higher-purity glass element, high-purity glass element, and production method and device for glass tube
JP3066962B2 (en) Method and apparatus for stretching glass base material
US20030046956A1 (en) Method and apparatus for crucible forming
JP2003146687A (en) Method for manufacturing optical fiber preform
JP4340584B2 (en) Glass tube manufacturing method and glass tube manufacturing apparatus
JP2006160561A (en) Method for manufacturing optical fiber preform and optical fiber preform
JP3418679B2 (en) Apparatus and method for processing optical fiber preform
JP4464321B2 (en) Method and apparatus for producing quartz glass rod
JP3912528B2 (en) Glass tube manufacturing method and manufacturing apparatus
JP4032226B2 (en) Manufacturing method of optical fiber preform
JP4289239B2 (en) Glass tube manufacturing method and glass tube manufacturing apparatus
JP2000302469A (en) Method and apparatus for drawing glass preform
JP2000128558A (en) Production of quartz glass preform for optical fiber

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20061120

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20091013

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20091016

R150 Certificate of patent or registration of utility model

Ref document number: 4395061

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121023

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20151023

Year of fee payment: 6