JPH0583499B2 - - Google Patents
Info
- Publication number
- JPH0583499B2 JPH0583499B2 JP60026494A JP2649485A JPH0583499B2 JP H0583499 B2 JPH0583499 B2 JP H0583499B2 JP 60026494 A JP60026494 A JP 60026494A JP 2649485 A JP2649485 A JP 2649485A JP H0583499 B2 JPH0583499 B2 JP H0583499B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- burner
- starting material
- layer
- fine particle
- 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 - Lifetime
Links
- 239000011521 glass Substances 0.000 claims description 54
- 239000007858 starting material Substances 0.000 claims description 38
- 239000002245 particle Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 235000012239 silicon dioxide Nutrition 0.000 claims description 5
- 230000002194 synthesizing effect Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 3
- 239000010419 fine particle Substances 0.000 description 21
- 238000009826 distribution Methods 0.000 description 10
- 238000009434 installation Methods 0.000 description 10
- 238000000151 deposition Methods 0.000 description 8
- 230000008021 deposition Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 239000013307 optical fiber Substances 0.000 description 5
- 229910003923 SiC 4 Inorganic materials 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000005373 porous glass Substances 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005350 fused silica glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009987 spinning Methods 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
- C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
- C03B37/01413—Reactant delivery systems
- C03B37/0142—Reactant deposition burners
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/60—Relationship between burner and deposit, e.g. position
- C03B2207/62—Distance
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/60—Relationship between burner and deposit, e.g. position
- C03B2207/64—Angle
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/70—Control measures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General 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)
- Glass Melting And Manufacturing (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ガラス微粒子の集合体を円柱状出発
材の外周部に形成する方法に関し、特に高純度が
要求される光フアイバ用母材製造の際の中間製品
として好適に用いられる、出発材外周部に堆積せ
しめられたガラス微粒子集合体の形成方法に関す
る。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for forming an aggregate of glass particles on the outer periphery of a cylindrical starting material, and is particularly applicable to the production of an optical fiber base material that requires high purity. The present invention relates to a method for forming a glass particle aggregate deposited on the outer periphery of a starting material, which is suitably used as an intermediate product in the process.
従来、石英系ガラス管或いは光フアイバ用母材
の製造方法として、特開昭48−73522号公報に示
されたような謂る“外付法”がある。この方法
は、回転するカーボン或いは石英系ガラス、アル
ミナなどの耐火性出発材の外周部に、SiC4など
の原料の加水分解反応により生成せしめたSiO2
などの微粒子状ガラスを堆積させていき、所定量
堆積させたあと堆積をやめ、出発材を引き抜き、
パイプ状ガラス集合体を形成し、このパイプ状ガ
ラス集合体を高温電気炉中で焼結透明ガラス化し
パイプ状ガラスを得ている。或いは、同様の方法
で出発材として中実の光フアイバ用ガラス母材を
用い、出発材とその外周部に形成されたガラス微
粒子堆積体の複合体を形成したのち、出発材を引
き抜かず該複合体を高温炉中で加熱処理しガラス
微粒子堆積体の部分を焼結することにより出発材
である光フアイバ用ガラス母材の外周部にさらに
透明ガラス層を形成するという方法も考えられ
る。
Conventionally, as a method for manufacturing a base material for a quartz-based glass tube or an optical fiber, there is a so-called "external attachment method" as disclosed in Japanese Patent Application Laid-open No. 73522/1983. In this method, SiO 2 produced by the hydrolysis reaction of raw materials such as SiC 4 is placed around the outer periphery of a rotating refractory starting material such as carbon, quartz glass, or alumina.
After depositing a predetermined amount of glass, the deposition is stopped and the starting material is pulled out.
A pipe-shaped glass aggregate is formed, and the pipe-shaped glass aggregate is sintered into transparent glass in a high-temperature electric furnace to obtain pipe-shaped glass. Alternatively, by using a solid glass base material for optical fiber as a starting material in a similar manner, a composite of the starting material and the glass fine particle deposit formed on the outer periphery of the starting material is formed, and then the composite is removed without pulling out the starting material. It is also conceivable to further form a transparent glass layer on the outer periphery of the starting glass base material for optical fiber by heating the body in a high-temperature furnace and sintering the part of the glass particle deposit body.
これらの方法において、ガラス微粒子を出発材
上に堆積させる方法としては、第２図に示すごと
く、ガラス微粒子合成用バーナー２，１を出発材
２，２に対し相対的に出発材軸と平行に幾度も往
復させることにより、出発材上２，２にガラス微
粒子堆積層２，３を幾層も形成していく方法があ
る。 In these methods, the glass particles are deposited on the starting material by placing the glass particle synthesis burners 2, 1 parallel to the starting material axis relative to the starting materials 2, 2, as shown in FIG. There is a method in which many layers of glass fine particle deposits 2 and 3 are formed on the starting materials 2 and 2 by reciprocating them many times.
しかしこの方法では堆積体初期には、ガラス微
粒子が堆積する堆積面積が小さいため、ガラス微
粒子堆積効率が悪いという欠点がある。 However, this method has a drawback in that the glass particle deposition efficiency is low because the deposition area on which the glass particles are deposited is small at the initial stage of the deposit.
また別の方法として第３図に示すごとく出発材
３，１の片端部付近からガラス微粒子を堆積させ
始め、ガラス微粒子合成用バーナー３，２を出発
材３，１に対し相対的に出発材軸と平行に徐々に
移動していくことによりガラス微粒子堆積体３，
４を出発材軸方向に形成していく方法は考えられ
ている。 Another method is to start depositing glass particles from near one end of the starting materials 3, 1, as shown in FIG. By gradually moving parallel to the glass fine particle deposit 3,
A method of forming 4 in the axial direction of the starting material has been considered.
本発明の目的は前記第２の方法において、ガラ
ス微粒子堆積体をより効率的にかつ安定にガラス
微粒子堆積層を形成する手段を提供するところに
ある。 An object of the present invention is to provide a means for more efficiently and stably forming a glass particle deposit layer using a glass particle deposit body in the second method.
本発明は、上記目的を達成するために、ガラス
微粒子合成用バーナーと出発材との相対的な位置
関係、特にガラス微粒子合成用バーナーの中心軸
と出発材の軸のなす角度が重要である点を指摘
し、その最適な角度範囲を提供するものである。
In order to achieve the above object, the present invention is characterized in that the relative positional relationship between the burner for synthesizing glass fine particles and the starting material, particularly the angle formed between the central axis of the burner for synthesizing glass fine particles and the axis of the starting material, is important. It points out and provides its optimal angle range.
すなわち本発明は自らの軸を回転軸として回転
している実質的に円柱状或いは円筒状の出発材の
片端近傍から、該出発材の外周部上に１本のガラ
ス微粒子合成用バーナーを用い、ガラス微粒子合
成用バーナーの火炎内にガラス原料を供給するこ
とにより発生させたガラス微粒子を堆積させ始
め、該バーナーを出発材の軸と平行に相対的に移
動させていくことにより、純シリカのガラス微粒
子の堆積体を出発材の外周部に軸方向に形成して
いく方法に於いて、該バーナーの中心軸と出発材
の軸のなす角度が20〜70°の範囲であることを特
徴とするガラス微粒子堆積体の製造方法である。 That is, the present invention uses one burner for synthesizing glass fine particles on the outer periphery of a substantially cylindrical or cylindrical starting material that is rotating around its own axis from near one end of the starting material, Glass particles generated by supplying glass raw materials into the flame of a burner for glass particle synthesis begin to accumulate, and by moving the burner relatively parallel to the axis of the starting material, pure silica glass is produced. A method of forming a deposit of fine particles in the axial direction on the outer periphery of the starting material, characterized in that the angle between the central axis of the burner and the axis of the starting material is in the range of 20 to 70°. This is a method for manufacturing a glass fine particle deposit.
本発明者等は、以下に述べる実験を行うことに
より本発明に到達した。実験は、第３図に模式的
に示す装置構成において、効率的かつ安定に出発
材３，１外周部に純シリカのガラス微粒子堆積層
３，４を形成しうるバーナー３，２の取付角度を
見い出すために、第１図にθとして表される出発
材３，１に対するバーナー取付角度を変えて、実
際にガラス微粒子堆積層３，４を形成し、その際
の純シリカのガラス微粒子の堆積効率及びガラス
微粒子のカサ密度分布を測定したものである。第
１図においてＬと示したものは、バーナー３，２
先端部からバーナー３，２軸方向に測定した出発
材３，１までの距離である。尚ガラス微粒子堆積
層のカサ密度分布は、ガラス微粒子堆積層が安定
に形成されるか否かを示す指標となるものであ
り、一般にカサ密度分布が半径方向に均一に近く
かつ平均的なカサ密度が高い程ガラス微粒子堆積
層が、その堆積途中や堆積後などに割れや変形な
どを起こさず、安定に形成できるものである。実
験においては出発材３，１として溶融石英ガラス
棒（15mmφ）を使用した。またバーナー３，２は
最外層の内径が20mmφの同心円状４重管バーナー
を用い、バーナー３，２には中心層にSiC4を
300cc／分、第２層にH2を6.0／分、第３層に
Arを1.5／分、最外層にO2を6.0／分供給し、
第１図にＬと示されるバーナー３，２先端と出発
材３，１とのきよりは60mmとした。また出発材
３，１は40rpmで回転させつつ、ガラス微粒子堆
積層の外径が50〜70mmφとなるように20〜50mm／
hrの速度で上昇させ引上げていつた。 The present inventors achieved the present invention by conducting the experiments described below. The experiment was carried out using the apparatus configuration schematically shown in FIG. 3, to determine the mounting angle of the burners 3 and 2 that would enable efficient and stable formation of pure silica glass particle deposit layers 3 and 4 on the outer periphery of the starting materials 3 and 1. In order to find out, the burner installation angle with respect to the starting materials 3 and 1, represented as θ in FIG. and the bulk density distribution of glass particles was measured. What is shown as L in FIG. 1 is the burner 3, 2.
This is the distance from the tip of the burner 3 to the starting materials 3 and 1 measured in the 2-axis direction. The bulk density distribution of the glass fine particle deposit layer is an indicator of whether the glass fine particle deposit layer is stably formed or not.In general, the bulk density distribution is close to uniform in the radial direction and has an average bulk density. The higher the value, the more stable the glass particle deposit layer can be formed without cracking or deforming during or after the deposition. In the experiment, a fused silica glass rod (15 mmφ) was used as the starting material 3,1. In addition, burners 3 and 2 are concentric quadruple pipe burners with an inner diameter of 20 mm in the outermost layer, and burners 3 and 2 have SiC 4 in the center layer.
300cc/min, 6.0/min of H2 in the 2nd layer, 3rd layer
Ar is supplied at 1.5/min, O 2 is supplied at 6.0/min to the outermost layer,
The distance between the tips of the burners 3, 2, indicated as L in FIG. 1, and the starting materials 3, 1 was 60 mm. In addition, while rotating the starting materials 3 and 1 at 40 rpm, the outer diameter of the glass fine particle deposited layer is 20 to 50 mmφ.
It was raised and pulled up at a speed of hr.
このようにして得られたバーナー取付角度θと
ガラス微粒子堆積速度の関係を第４図ａに、また
取付角度θを20°，30°，60°，70°とを変えた時の
カサ密度分布の変化を第４図ｂに示す。第１図ａ
より効率的にガラス微粒子層を堆積せしめるには
バーナーの取付角度に好適な範囲が存在し、その
範囲は20°〜70°であることがわかる。さらに第４
図ｂでは30°〜60°の取付角度において比較的カサ
密度分布が半径方向に均一になることがわかる。
したがつて本発明方法におけるバーナーの取付角
度は20°〜70°、好ましくは30°〜60°である。 The relationship between the burner installation angle θ and the glass particle deposition rate obtained in this way is shown in Figure 4a, and the bulk density distribution when the installation angle θ is changed to 20°, 30°, 60°, and 70°. The change in is shown in Fig. 4b. Figure 1a
It can be seen that there is a suitable range for the burner installation angle in order to deposit the glass fine particle layer more efficiently, and that range is 20° to 70°. Furthermore, the fourth
In Fig. b, it can be seen that the bulk density distribution is relatively uniform in the radial direction at the mounting angle of 30° to 60°.
Therefore, the installation angle of the burner in the method of the invention is between 20° and 70°, preferably between 30° and 60°.
実施例 １
第５図に示す屈折率分布を有し、コア径６mm
φ、クラツド外径40mmφのVAD法により作成し
たシングルモードフアイバ用透明ガラス母材を
12.5mmφに延伸したものを出発材とし、第１図及
び第３図に示した装置により多孔質ガラス微粒子
層を外径90mmφになるよう形成した。この際バー
ナーの取付角度は50°とした。多孔質ガラス微粒
子形成に際してはバーナーにH26.0／分、O26.0
／分、SiC4300cc／分を供給した。また、出
発材は40rpmで回転させつつ、40mm／hrの速度で
引上ていつた。その後該母材を電気炉中で加熱し
多孔質ガラス層を透明ガラス化した結果、第６図
に示す屈折率分布をもち、Ａが2.25mmφ，Ｂが
15.0mmφ，Ｃが36mmφのシングルモードフアイバ
用母材を得た。なお透明化の際、多孔質ガラス層
の収縮力により12.5mmφに延伸していた出発材は
軸方向にいくぶん縮み15.0mmφまでに太くなつて
いる。得られた母材を外径125μmに紡糸した結
果、カツトオフ波長1.2μm，1.3μmでの伝送損失
が0.5dB／Kmという良好な特性を有するシングル
モードフアイバを得た。
Example 1 It has the refractive index distribution shown in Fig. 5, and the core diameter is 6 mm.
φ, cladding outer diameter 40mmφ, transparent glass base material for single mode fiber made by VAD method.
Using the material stretched to 12.5 mmφ as a starting material, a porous glass fine particle layer was formed to have an outer diameter of 90 mmφ using the apparatus shown in FIGS. 1 and 3. At this time, the burner installation angle was 50°. When forming porous glass particles, the burner was heated with H 2 6.0/min and O 2 6.0
/min, and 300cc/min of SiC 4 was supplied. Further, the starting material was pulled up at a speed of 40 mm/hr while rotating at 40 rpm. Thereafter, the base material was heated in an electric furnace to turn the porous glass layer into transparent glass. As a result, it had the refractive index distribution shown in Figure 6, with A being 2.25 mmφ and B being
A base material for a single mode fiber with a diameter of 15.0 mm and a diameter of 36 mm was obtained. During the transparentization, the starting material, which had been stretched to 12.5 mmφ due to the shrinkage force of the porous glass layer, shrunk somewhat in the axial direction and became thicker to 15.0 mmφ. As a result of spinning the obtained base material to an outer diameter of 125 μm, a single-mode fiber with good characteristics such as a transmission loss of 0.5 dB/Km at cutoff wavelengths of 1.2 μm and 1.3 μm was obtained.
実施例 ２
出発材として、外径20mmφのジルコニア管を用
い、第１図及び第３図に示した装置によりガラス
微粒子層を外径100mmφになるように形成した。
この際バーナー取付角度は35°としバーナーにH2
15／分、O215／分、SiC4600cc／分を供給
した。また出発材は40rpmで回転しつつ、55mm／
hrの速度で引上げていつた。ガラス微粒子層形成
後、出発材を引抜き円筒状のガラス微粒子体を作
製し、該ガラス微粒子体と電気炉を用いSF63mol
％，He97mol％の雰囲気中で1600℃まで加熱し
透明ガラス化した。その結果外径45mmφ、内径10
mmφ，Ｆを１重量％含有する石英ガラス管を得
た。本ガラス管は純砕石英棒をコア材として挿入
一体化することにより光フアイバ用母材として用
いることができるものである。Example 2 Using a zirconia tube with an outer diameter of 20 mmφ as a starting material, a glass fine particle layer was formed to have an outer diameter of 100 mmφ using the apparatus shown in FIGS. 1 and 3.
At this time, the burner installation angle should be 35°, and the burner should be mounted at an H 2
15/min, O 2 15/min, and SiC 4 600 cc/min. In addition, the starting material was rotated at 40 rpm and 55 mm/
It was pulled up at a speed of hr. After forming the glass fine particle layer, the starting material was pulled out to produce a cylindrical glass fine particle body, and 3 mol of SF 6 was added using the glass fine particle body and an electric furnace.
%, He was heated to 1600℃ in an atmosphere of 97 mol% He to make it transparent vitrified. As a result, the outer diameter is 45mmφ, and the inner diameter is 10.
A quartz glass tube containing 1% by weight of mmφ,F was obtained. This glass tube can be used as a base material for optical fiber by inserting and integrating a pure crushed quartz rod as a core material.
比較例
実施例１において、バーナー取付角度を75°と
したところ、ガラス微粒子層形成時に外周部に亀
裂が生じ所望のガラス微粒子体は得られなかつ
た。またバーナー取付角度を70°とした場合もガ
ラス微粒子層形成後冷却中にクラツクが生じ使用
することができなかつた。Comparative Example In Example 1, when the burner installation angle was set to 75°, cracks occurred at the outer periphery during formation of the glass fine particle layer, and the desired glass fine particle body could not be obtained. Further, even when the burner installation angle was set to 70°, a crack occurred during cooling after forming the glass fine particle layer, making it impossible to use.
以上の説明及び実施例の結果から明らかなよう
に、本発明はガラス微粒子堆積体をより効率的か
つ安定に製造できる方法である。
As is clear from the above description and the results of the Examples, the present invention is a method that can produce glass fine particle deposits more efficiently and stably.
第１図は本発明を説明する図であつて、出発材
に対するバーナーの取付角度（θ）を示す図、第
２図は従来法の説明図、第３図は従来法及び本発
明に用いる装置の説明図、第４図ａはバーナー取
付角度（θ）とガラス微粒子の堆積速度（ｇ／
分）の関係を示すグラフであり、第４図ｂはバー
ナー取付角度（θ）を変えた場合の半径方向にお
けるカサ密度分布の関係を示すグラフである。第
５図は本発明の実施例１にて用いた出発材作製用
のシングルモードフアイバ用透明ガラス母材の屈
折率分布を示す図、第６図は上記実施例１から得
たシングルモードフアイバ用母材の屈折率分布を
示す図である。
Fig. 1 is a diagram for explaining the present invention, showing the mounting angle (θ) of the burner with respect to the starting material, Fig. 2 is a diagram for explaining the conventional method, and Fig. 3 is a diagram for explaining the conventional method and the apparatus used in the present invention. Figure 4a is an explanatory diagram showing the relationship between the burner installation angle (θ) and the deposition rate of glass particles (g/
FIG. 4B is a graph showing the relationship between the bulk density distribution in the radial direction when the burner mounting angle (θ) is changed. Figure 5 is a diagram showing the refractive index distribution of the transparent glass base material for single mode fiber used in Example 1 of the present invention for producing the starting material, and Figure 6 is for the single mode fiber obtained from Example 1 above. FIG. 3 is a diagram showing a refractive index distribution of a base material.
Claims (1)
に円柱状或いは円筒状の出発材の片端近傍から、
該出発材の外周部上に１本のガラス微粒子合成用
バーナーを用い、該ガラス微粒子合成用バーナー
の火炎内にガラス原料を供給することにより発生
させたガラス微粒子を堆積させ始め、該バーナー
を出発材の軸と平行に相対的に移動させていくこ
とにより、純シリカのガラス微粒子の堆積体を出
発材の外周部に軸方向に形成していく方法に於い
て、該バーナーの中心軸と出発材の軸のなす角度
が20〜70°の範囲であることを特徴とするガラス
微粒子堆積体の製造方法。1 From near one end of a substantially cylindrical or cylindrical starting material that is rotating around its own axis,
Using one burner for synthesizing glass particles on the outer periphery of the starting material, the glass particles generated by supplying the glass raw material into the flame of the burner for synthesizing glass particles begin to be deposited, and then the burner is started. In this method, a deposit of pure silica glass particles is formed in the axial direction on the outer periphery of the starting material by moving the material relatively parallel to the axis of the burner. 1. A method for producing a glass particle deposit, characterized in that the angle formed by the axis of the material is in the range of 20 to 70°.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2649485A JPS61186240A (en) | 1985-02-15 | 1985-02-15 | Production of piled material of glass fine particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2649485A JPS61186240A (en) | 1985-02-15 | 1985-02-15 | Production of piled material of glass fine particles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61186240A JPS61186240A (en) | 1986-08-19 |
| JPH0583499B2 true JPH0583499B2 (en) | 1993-11-26 |
Family
ID=12195047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2649485A Granted JPS61186240A (en) | 1985-02-15 | 1985-02-15 | Production of piled material of glass fine particles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61186240A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2125508C (en) * | 1993-06-16 | 2004-06-08 | Shinji Ishikawa | Process for producing glass preform for optical fiber |
| JP6581637B2 (en) * | 2017-10-13 | 2019-09-25 | 信越化学工業株式会社 | Porous glass base material manufacturing apparatus and manufacturing method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5547237A (en) * | 1978-09-29 | 1980-04-03 | Fujitsu Ltd | Production of glass base material for optical fiber |
| JPS55116638A (en) * | 1979-02-22 | 1980-09-08 | Corning Glass Works | Manufacture of optical fiber material |
| JPS56160335A (en) * | 1980-05-08 | 1981-12-10 | Nec Corp | Manufacture of base material for optical fiber |
| JPS5795838A (en) * | 1980-12-03 | 1982-06-14 | Nippon Telegr & Teleph Corp <Ntt> | Manufacture of oxide powder rod for optical fiber |
| JPS57170832A (en) * | 1981-04-13 | 1982-10-21 | Nippon Telegr & Teleph Corp <Ntt> | Manufacture of base material for optical fiber |
| JPS57191243A (en) * | 1981-05-22 | 1982-11-25 | Fujitsu Ltd | Manufacturing of optical fiber preform |
| JPS58204833A (en) * | 1982-05-25 | 1983-11-29 | Showa Electric Wire & Cable Co Ltd | Manufacture of optical fiber preform |
| JPS59128227A (en) * | 1983-01-12 | 1984-07-24 | Hitachi Cable Ltd | Manufacture of base material for optical fibre |
| JPS6060935A (en) * | 1983-09-09 | 1985-04-08 | Furukawa Electric Co Ltd:The | Manufacture of base material for optical fiber |
-
1985
- 1985-02-15 JP JP2649485A patent/JPS61186240A/en active Granted
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5547237A (en) * | 1978-09-29 | 1980-04-03 | Fujitsu Ltd | Production of glass base material for optical fiber |
| JPS55116638A (en) * | 1979-02-22 | 1980-09-08 | Corning Glass Works | Manufacture of optical fiber material |
| JPS56160335A (en) * | 1980-05-08 | 1981-12-10 | Nec Corp | Manufacture of base material for optical fiber |
| JPS5795838A (en) * | 1980-12-03 | 1982-06-14 | Nippon Telegr & Teleph Corp <Ntt> | Manufacture of oxide powder rod for optical fiber |
| JPS57170832A (en) * | 1981-04-13 | 1982-10-21 | Nippon Telegr & Teleph Corp <Ntt> | Manufacture of base material for optical fiber |
| JPS57191243A (en) * | 1981-05-22 | 1982-11-25 | Fujitsu Ltd | Manufacturing of optical fiber preform |
| JPS58204833A (en) * | 1982-05-25 | 1983-11-29 | Showa Electric Wire & Cable Co Ltd | Manufacture of optical fiber preform |
| JPS59128227A (en) * | 1983-01-12 | 1984-07-24 | Hitachi Cable Ltd | Manufacture of base material for optical fibre |
| JPS6060935A (en) * | 1983-09-09 | 1985-04-08 | Furukawa Electric Co Ltd:The | Manufacture of base material for optical fiber |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61186240A (en) | 1986-08-19 |
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