JPS649827A - Production of perform for optical fiber - Google Patents
Production of perform for optical fiberInfo
- Publication number
- JPS649827A JPS649827A JP16249887A JP16249887A JPS649827A JP S649827 A JPS649827 A JP S649827A JP 16249887 A JP16249887 A JP 16249887A JP 16249887 A JP16249887 A JP 16249887A JP S649827 A JPS649827 A JP S649827A
- Authority
- JP
- Japan
- Prior art keywords
- rod
- core
- glass rod
- oven
- 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
- C03B37/01211—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments by inserting one or more rods or tubes into a tube
Abstract
PURPOSE:To enable production of a preform capable of obtaining a single mode optical fiber having low loss, by heating a core rod in a rod-in tube method in a chlorine based gas atmosphere prior to drawing the core rod. CONSTITUTION:A glass rod for core is inserted into the hollow part of a clad material having lower refraction index than the glass rod for core and the glass rod is heated in the inserted state and gap between the both is filled to produce the aimed preform for optical fiber. In the method, the glass rod 1 for core is fixed through an upper dummy rod 2 to a rotating mechanism 3 and retained in an oven center tube 5 of a heat oven 4. Then the glass rod is heated in a chlorine based gas atmosphere introduced from an introducing part 6 by the oven 4. OH group and impurity existing in the surface layer of the rod 1 is removed by the above-mentioned treatment. Then a glass rod 7 already treated is heated to a prescribed temperature in other high-temperature heat oven 9, drawn to a core rod 11 having desired fine diameter with a drawing and rotating mechanism 10 and the drawn rod is inserted into the hollow part of the clad material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16249887A JPS649827A (en) | 1987-07-01 | 1987-07-01 | Production of perform for optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16249887A JPS649827A (en) | 1987-07-01 | 1987-07-01 | Production of perform for optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS649827A true JPS649827A (en) | 1989-01-13 |
Family
ID=15755763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16249887A Pending JPS649827A (en) | 1987-07-01 | 1987-07-01 | Production of perform for optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS649827A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6366441B1 (en) | 1999-04-19 | 2002-04-02 | Honda Giken Kogyo Kabushiki Kaisha | Electromagnetic actuator |
-
1987
- 1987-07-01 JP JP16249887A patent/JPS649827A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6366441B1 (en) | 1999-04-19 | 2002-04-02 | Honda Giken Kogyo Kabushiki Kaisha | Electromagnetic actuator |
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