US4468413A
Expired / Lapsed
US
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Method of manufacturing fluorine-doped optical fibers
Assignee: Plasma Optical Fibre BV
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Filing: 1982-11-19
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Granted: 1984-08-28
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Expires: 2002-11-19
Abstract
Abstract Doped silica glass can be manufactured by reacting gaseous vapors of silica-forming compounds and dopant-forming compounds. Increased fluorine dopant can be provided with less fluorine dopant-forming compound, when the fluorine dopant-forming compound is hexafluoroethane (C 2 F 6 ).
Inventors
- 👤 Peter K. Bachmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:56
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/018; C03B37/01807; C03B37/01815; C03B37/01823; C03B37/0183; C03B2201/00; C03B2201/06; C03B2201/08; C03B2201/12; Y; Y10; Y10S; Y10S65/00; Y10S65/15; Y10S65/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A method of manufacturing fluorine-doped optical fiber preforms comprising the steps of: providing gases or vapors of oxygen, SiCl 4 , and C 2 F 6 ; mixing the gases and vapors; passing the mixture through a glass tube having an inner wall; causing the mixture to react to produce at least one fluorine-doped glass layer on the inner wall of the tube, said layer having a refractive index; and providing at least one glass core layer on the fluorine-doped glass layer, said glass layer having a refractive index greater than the refractive index of the fluorine-doped layer.
Claim 2
Independent Claim
98 words
A method of manufacturing fluorine-doped optical fiber preforms comprising the steps of: providing gases or vapors of oxygen, SiCl 4 , and C 2 F 6 ; mixing the gases and vapors; passing the mixture through a glass tube having an inner wall; causing the mixture to react to produce at least one fluorine-doped glass layer on the inner wall of the tube, said layer having a refractive index; and providing at least one glass core layer on the fluorine-doped glass layer, said glass layer having a refractive index greater than the refractive index of the fluorine-doped layer.
Claim 3
Dependent Claim
40 words
A method as claimed in claim 1, characterized in that: the mixture is caused to react by generating a nonisothermal plasma zone within the tube; and the plasma zone is moved back and forth along the length of the tube.
Claim 4
Dependent Claim
38 words
A method of manufacturing flourine-doped preforms for monomode optical fibers, comprising manufacturing a preform as claimed in claim 2, characterized in that: the glass tube is an undoped silica tube; and the glass core layer is undoped silica.
Claim 5
Dependent Claim
38 words
A method of manufacturing fluorine-doped preforms for monomode optical fibers, comprising manufacturing a preform as claimed in claim 1, characterized in that: the glass tube is an undoped silica tube; and the glass core layer is undoped silica.
Claim 6
Independent Claim
54 words
A method of manufacturing layers of fluorine-doped glass comprising the steps of: providing gases or vapors of oxygen, SiCl 4 and C 2 F 6 ; mixing the gases and vapors; passing the mixture over a substrate; and causing the mixture to react to produce at least one fluorine-doped glass layer on the substrate.
Claim 7
Independent Claim
54 words
A method of manufacturing layers of fluorine-doped glass comprising the steps of: providing gases or vapors of oxygen, SiCl 4 and C 2 F 6 ; mixing the gases and vapors; passing the mixture over a substrate; and causing the mixture to react to produce at least one fluorine-doped glass layer on the substrate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |