JPS5747735A - Manufacture of base material for optical fiber - Google Patents
Manufacture of base material for optical fiberInfo
- Publication number
- JPS5747735A JPS5747735A JP12036480A JP12036480A JPS5747735A JP S5747735 A JPS5747735 A JP S5747735A JP 12036480 A JP12036480 A JP 12036480A JP 12036480 A JP12036480 A JP 12036480A JP S5747735 A JPS5747735 A JP S5747735A
- Authority
- JP
- Japan
- Prior art keywords
- tube
- materials
- gaseous
- glass layer
- heated
- 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
- C03B37/014—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]
- C03B37/018—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] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
- C03B37/01807—Reactant delivery systems, e.g. reactant deposition burners
Abstract
PURPOSE:To prevent a change of the thickness of a deposited glass layer in the longitudinal direction of a reaction tube by preheating gaseous starting materials introduced into the tube. CONSTITUTION:Gaseous starting materials for forming a glass layer such as SiCl4 and POCl3 or GeCl4 for controlling refractive index are preheated together with gaseous O2 and Ar introduced from the gas introducing end 22 of a reaction tube 21. In order to preheat the materials, a gas heating means 28 provided with a heating section 29 is attached to a gaseous starting material path close to the end 22, and the materials are heated to about 300-400 deg.C at which they cause no oxidation. The prepared materials enter the tube 21, and by depositing soot on the inner wall of the tube 21 by a CVD method and melting it while rotating the tube 21, a part 23 close to the inlet of the tube 21 is heated by the gaseous materials. Accordingly, when the region is locally heated with an oxyhydrogen burner 27, the gaseous materials reach the oxidation temps. at once, and a sufficient amount of soot is deposited even at the part 23. Thus, a glass layer 30 with improved uniformity can be formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12036480A JPS5747735A (en) | 1980-08-29 | 1980-08-29 | Manufacture of base material for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12036480A JPS5747735A (en) | 1980-08-29 | 1980-08-29 | Manufacture of base material for optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5747735A true JPS5747735A (en) | 1982-03-18 |
Family
ID=14784362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12036480A Pending JPS5747735A (en) | 1980-08-29 | 1980-08-29 | Manufacture of base material for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5747735A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59199543A (en) * | 1983-04-15 | 1984-11-12 | エステイ−シ− ピ−エルシ− | Manufacture of optical fiber preform |
| JPS6418797U (en) * | 1987-07-23 | 1989-01-30 | ||
| KR20030049018A (en) * | 2001-12-13 | 2003-06-25 | 엘지전선 주식회사 | Chemical Preheating Method for Increasing Usable Length of Preform and Apparatus therefor |
| CN102276143A (en) * | 2010-06-11 | 2011-12-14 | 德拉克通信科技公司 | Method for manufacturing a primary preform |
-
1980
- 1980-08-29 JP JP12036480A patent/JPS5747735A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59199543A (en) * | 1983-04-15 | 1984-11-12 | エステイ−シ− ピ−エルシ− | Manufacture of optical fiber preform |
| JPS6418797U (en) * | 1987-07-23 | 1989-01-30 | ||
| KR20030049018A (en) * | 2001-12-13 | 2003-06-25 | 엘지전선 주식회사 | Chemical Preheating Method for Increasing Usable Length of Preform and Apparatus therefor |
| CN102276143A (en) * | 2010-06-11 | 2011-12-14 | 德拉克通信科技公司 | Method for manufacturing a primary preform |
| US20110302966A1 (en) * | 2010-06-11 | 2011-12-15 | Draka Comteq B.V. | Method for manufacturing a primary preform |
| US8667816B2 (en) * | 2010-06-11 | 2014-03-11 | Draka Comteq B.V. | Method for manufacturing a primary preform |
| EP2394967B1 (en) * | 2010-06-11 | 2016-08-10 | Draka Comteq B.V. | A method and an apparatus for manufacturing a primary preform |
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