JPS56125231A - Preparation of light transmission fiber - Google Patents
Preparation of light transmission fiberInfo
- Publication number
- JPS56125231A JPS56125231A JP2692480A JP2692480A JPS56125231A JP S56125231 A JPS56125231 A JP S56125231A JP 2692480 A JP2692480 A JP 2692480A JP 2692480 A JP2692480 A JP 2692480A JP S56125231 A JPS56125231 A JP S56125231A
- Authority
- JP
- Japan
- Prior art keywords
- rod
- preform
- glass
- fiber
- size
- 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
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/029—Furnaces therefor
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2205/00—Fibre drawing or extruding details
- C03B2205/60—Optical fibre draw furnaces
- C03B2205/62—Heating means for drawing
- C03B2205/63—Ohmic resistance heaters, e.g. carbon or graphite resistance heaters
Landscapes
- Engineering & Computer Science (AREA)
- 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)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
PURPOSE:To prepare an optical fiber having excellent smoothness and high mechanical strength, by carrying out melt spinning in a space having adequate temperature distribution generated by a heater having a size corresponding to the size of a preform rod or the size of a pipe covering said preform rod, without using a heat- shielding material. CONSTITUTION:A porous glass soot rod is doped with a dopant for controlling the characteristics of the glass, such as refractive index, softening point, etc., to a predetermined concentration distribution, and sintered to obtain a transparent preform rod. The rod is molten and spun directly, or as a rod-in-tube by inserting into a tube of borosilicate glass or aluminosilicate glass. In the above melt-spinning process, a heater 21 having a radius larger than that of the preform 23 by 2-6mm. and a length of 1.5-3.5 times the radius of the preform 23, and devoid of heat- sheilding material, is placed in a capsule 22 filled with N2. The device produces a fiber having excellent smoothness and high mechanical strength, prevents the excessive heating at the inner side of the glass rod and the generation of bubbles in the rod, reduces the structural defects of the fiber, and gives an optical fiber having low transmission loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2692480A JPS56125231A (en) | 1980-03-03 | 1980-03-03 | Preparation of light transmission fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2692480A JPS56125231A (en) | 1980-03-03 | 1980-03-03 | Preparation of light transmission fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56125231A true JPS56125231A (en) | 1981-10-01 |
Family
ID=12206727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2692480A Pending JPS56125231A (en) | 1980-03-03 | 1980-03-03 | Preparation of light transmission fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56125231A (en) |
-
1980
- 1980-03-03 JP JP2692480A patent/JPS56125231A/en active Pending
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