JPS6325242A - Production of parent material for optical fiber - Google Patents
Production of parent material for optical fiberInfo
- Publication number
- JPS6325242A JPS6325242A JP16882186A JP16882186A JPS6325242A JP S6325242 A JPS6325242 A JP S6325242A JP 16882186 A JP16882186 A JP 16882186A JP 16882186 A JP16882186 A JP 16882186A JP S6325242 A JPS6325242 A JP S6325242A
- Authority
- JP
- Japan
- Prior art keywords
- soot
- optical fiber
- glass rod
- combustion gas
- center material
- 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 abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000000463 material Substances 0.000 title abstract description 8
- 239000004071 soot Substances 0.000 claims abstract description 12
- 239000011521 glass Substances 0.000 claims abstract description 11
- 239000000567 combustion gas Substances 0.000 claims abstract description 9
- 239000001257 hydrogen Substances 0.000 claims abstract description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 14
- 238000000151 deposition Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 abstract description 4
- 230000008021 deposition Effects 0.000 abstract description 3
- 239000000377 silicon dioxide Substances 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- 150000002431 hydrogen Chemical class 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000005245 sintering 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]
Abstract
Description
【発明の詳細な説明】
［ＩＥ業上の利用分野］
この発明は、光ファイバ母材の製造方法に関するもので
、特に次の従来技術の項で述べる「透明ガラス棒とスー
ト堆積との組合せ方式」による製造方法に関するもので
あり、ＯＨ基による伝送損失の大幅低減を目的とするも
のである。[Detailed Description of the Invention] [Field of Application in the IE Industry] The present invention relates to a method for manufacturing an optical fiber preform, and in particular, relates to a method for manufacturing an optical fiber preform, and in particular to a method of “combining a transparent glass rod and soot deposition” described in the next prior art section. ”, and its purpose is to significantly reduce transmission loss due to OH groups.
［従来の技術］
透明ガラス棒とスート堆積との組合せ方式の、光ファイ
バ母材の製造方法について、筒中に説ＩＪ１する。[Prior Art] A method for manufacturing an optical fiber preform using a combination method of a transparent glass rod and soot deposition will be described in the following.
（１）第２図のように、透明なガラス棒からなる中心部
材１０を準備する。(1) As shown in FIG. 2, a central member 10 made of a transparent glass rod is prepared.
これは後で光ファイバのコアとなるべきもので、たとえ
ば、
■Ｇｅドープシリカ、
■純粋シリカ、
■微量のＦドープシリカ。This will later become the core of the optical fiber, for example: ■Ge-doped silica, ■Pure silica, ■A trace amount of F-doped silica.
などからなる。Consists of etc.
また、第３図のように、後にコアとなるべき部分１２と
、クラ−、ドとなるべき部分の一部１４゜とからなるも
のもある。In addition, as shown in FIG. 3, there is also one that consists of a portion 12 that will later become the core and a portion 14 degrees of the portion that will become the blade and the blade.
この中心部材ｌＯは、たとえばＶＡＤ法などにより作製
する。This central member IO is manufactured by, for example, the VAD method.
（２）中心部材１０の周囲にスートを堆積する。(2) Depositing soot around the central member 10.
第４図は、その状況を示し、１６はダミーガラス棒、１
８はバーナ、２０はスートである。Figure 4 shows the situation, where 16 is a dummy glass rod, 1
8 is burner and 20 is suit.
スート２０は、後でクラッドとなるべきものである。Suit 20 is what will later become the cladding.
（３）次に堆積したスート２０を加熱して、全体に透明
なガラス棒（プリフォーム）を得る。(3) Next, the deposited soot 20 is heated to obtain a completely transparent glass rod (preform).
（４）必要に応じて、上記の（２） （３）の工程を繰
返す。(4) Repeat steps (2) and (3) above as necessary.
［発明が解決しようとする間ｍ点］
中心部材１０の表面は、ゴミなどにより汚れている。そ
れをそのまま使用して、その上にスートを堆積させると
、焼結後に気泡が生じ、損失増の原因になる。[Point m to be solved by the invention] The surface of the central member 10 is dirty with dust and the like. If it is used as is and soot is deposited on it, bubbles will be generated after sintering, which will cause increased loss.
ゴミを除去する手段として、酸水素炎でファイヤポリッ
シュする方法が知られている。A known method for removing dust is fire polishing using an oxyhydrogen flame.
しかしこの方法では、中心部材１０の内部にＯＨ５基を
拡散させてしまい、かえって損失を増加させる。第５図
に、その場合の中心部材１０のＯＨ基濃度分布を示す。However, in this method, the OH5 groups are diffused into the interior of the central member 10, which increases the loss on the contrary. FIG. 5 shows the OH group concentration distribution of the central member 10 in that case.
［問題点を解決するための手段］
この発明は、水素を含まない燃焼ガスの火炎によって、
前記中心部材１０の表面をファイヤポリッシュすること
によって、上記の問題の解決を図ったものである。[Means for Solving the Problems] The present invention provides a means for solving the problems by using a flame of combustion gas that does not contain hydrogen.
The above problem is solved by fire polishing the surface of the central member 10.
［その説明コ
第１図に、ファイヤポリッシュの状況を模型的に示した
。[Explanation] Figure 1 schematically shows the situation of fire polishing.
２２はガラス旋盤、２４はバーナ、２６は燃焼ガス、２
８は酸素ガス、３０は火炎である。22 is a glass lathe, 24 is a burner, 26 is a combustion gas, 2
8 is oxygen gas, and 30 is flame.
このファイヤポリッシュは、Ｈ２濃度の極めて小さい、
清冷な、湿気の少ない雰囲気３２内で実旅することが望
ましい。This fire polish has an extremely low H2 concentration.
It is desirable to travel in a cool, low-humidity atmosphere 32.
その理由は、雰囲気３２中にＨ２が含まれていると、燃
焼中の熱で、Ｈ２が中心部材ｌＯの内部に拡散して、損
失増の原因になるからである。The reason for this is that if H2 is included in the atmosphere 32, the heat during combustion will cause the H2 to diffuse into the interior of the central member IO, causing an increase in loss.
Ｈを含まない燃焼ガスの例としては、ＣＯやＣ５２があ
る。これらは、燃焼時に、
ｃｏ＋１７２０２→Ｃ０２
Ｃ５２＋３０２→ＣＯ２＋２Ｓ０２
のように、Ｈ２Ｏを発生させないので、Ｈ２またはＯＨ
基の拡散が生じない。Examples of combustion gases that do not contain H include CO and C52. These do not generate H2O during combustion, such as co+17202→C02 C52+302→CO2+2S02, so H2 or OH
No diffusion of groups occurs.
［実施例］
中心部材にＷＡＤ法で作ったガラス棒を用い、本発明の
方法により母材を作り、それから光ファイバを製作した
ところ、ＯＨ基吸収による損失のピーク（波長λ＝ １
．３８μ量）は、１ｄＢ／ｋｍ以下であり、波長入＝
１．５５ル■では、０．２ ｄＢ／に層以下という、
低損失のものが得られた。[Example] A glass rod made by the WAD method was used as the central member, a base material was made by the method of the present invention, and an optical fiber was made from it.
．． 38 μ amount) is less than 1 dB/km, and the wavelength input =
At 1.55 l, it is less than 0.2 dB/layer.
A product with low loss was obtained.
［発明の効果］
燃焼時にＨ２Ｏが発生しない燃焼ガスを使用しているの
で、ＯＨ基の拡散がなく、ＯＨによる損失増がない。[Effects of the Invention] Since a combustion gas that does not generate H2O during combustion is used, there is no diffusion of OH groups and no increase in loss due to OH.
第１図は本発明の詳細な説明図、
第２図と第３図は中心部材１０の説’Ｊ１図、第４図は
中心部材１０上にスー）２０を堆積する状況の説明図、
第５図は中心部材の表面を酸水素炎でファイヤポリッシ
ュしたときの、中心部材の０Ｈｃｉ度分布図。
ｌＯ：中心部材
１２：コアとなるべき部分
１４：クラッドとなるべき部分FIG. 1 is a detailed explanatory diagram of the present invention, FIGS. 2 and 3 are diagrams of the central member 10, and FIG. Figure 5 is a 0Hci degree distribution diagram of the center member when the surface of the center member is fire polished with an oxyhydrogen flame. lO: Central member 12: Portion that should become the core 14: Portion that should become the cladding
Claims (3)
その周囲にスートを堆積させる工程を含む光ファイバ母
材の製造方法において、 前記スートの堆積前に、水素を含まない燃焼ガスの火炎
により、前記中心部材の表面をファイヤポリッシュする
ことを特徴とする、光ファイバ母材の製造方法。(1) Prepare a cylindrical transparent glass rod as the central member,
A method for manufacturing an optical fiber preform including a step of depositing soot around the core member, characterized in that before depositing the soot, the surface of the core member is fire-polished with a flame of combustion gas that does not contain hydrogen. , a method for manufacturing an optical fiber preform.
請求の範囲第１項に記載の光ファイバ母材の製造方法。(2) The method for manufacturing an optical fiber preform according to claim 1, wherein the combustion gas is CO.
特許請求の範囲第１項に記載の光ファイバ母材の製造方
法。(3) The combustion gas is CS_2,
A method for manufacturing an optical fiber preform according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16882186A JPS6325242A (en) | 1986-07-17 | 1986-07-17 | Production of parent material for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16882186A JPS6325242A (en) | 1986-07-17 | 1986-07-17 | Production of parent material for optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6325242A true JPS6325242A (en) | 1988-02-02 |
Family
ID=15875132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16882186A Pending JPS6325242A (en) | 1986-07-17 | 1986-07-17 | Production of parent material for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6325242A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9588287B2 (en) | 2015-08-05 | 2017-03-07 | Sumitomo Electric Industries, Ltd. | Multimode optical fiber |
-
1986
- 1986-07-17 JP JP16882186A patent/JPS6325242A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9588287B2 (en) | 2015-08-05 | 2017-03-07 | Sumitomo Electric Industries, Ltd. | Multimode optical fiber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6038345B2 (en) | Manufacturing method of glass material for optical transmission | |
| JPH052118A (en) | Optical fiber and production thereof | |
| JP3941910B2 (en) | Method for producing hydrogen-resistant optical waveguide fiber and soot preform as precursor thereof | |
| US3932160A (en) | Method for forming low loss optical waveguide fibers | |
| JP2001510137A5 (en) | ||
| CA1266403A (en) | Method for producing glass preform for optical fiber containing fluorine in cladding | |
| JP4079204B2 (en) | Quartz glass tube for optical fiber preform and manufacturing method thereof | |
| JPS6325242A (en) | Production of parent material for optical fiber | |
| JPS6325241A (en) | Production of parent material for optical fiber | |
| JPS607407A (en) | Optical fiber and its manufacture | |
| JPS62167235A (en) | Production of base material for optical fiber | |
| JPS61158303A (en) | Formation of quartz optical waveguide | |
| JP4565221B2 (en) | Optical fiber preform | |
| JPS6036343A (en) | Production of glass material for optical transmission | |
| JP2898705B2 (en) | Manufacturing method of optical fiber preform | |
| JPS63248733A (en) | Production of single-mode optical fiber base material | |
| JPH01286932A (en) | Production of optical fiber preform | |
| JPS591218B2 (en) | Manufacturing method of glass base material for optical fiber | |
| JPS632900B2 (en) | ||
| JPS6011250A (en) | Fiber for optical transmission and its manufacture | |
| JP2618260B2 (en) | Method for producing intermediate for optical fiber preform | |
| JPS63123829A (en) | Production of preform for optical fiber | |
| JPS6240302B2 (en) | ||
| JPS6140843A (en) | Optical fiber | |
| JP2645710B2 (en) | Preform for optical fiber and method of manufacturing the same |