Claims
- 1. A process for producing an optical transmission fiber comprising depositing a doped fused silica layer containing F and then a fused silica layer on to the inner surface of a pipe of fused silica or water-repellant glass and melting and spinning said pipe into a fiber, said doped fused silica layers being formed by (A) oxidizing halides, hydrides or organic compounds of Si with OF.sub.2 or oxygen containing a gaseous fluorine compound, or (B) by the oxidation of SiF.sub.4 to form doped fused silica containing F and depositing said doped fused silica containing F as a layer.
- 2. A process for producing an optical transmission fiber comprising inserting a pure fused silica rod into a pipe of a doped fused silica containing F and melting and spinning said pipe containing said rod into a fiber.
- 3. A process for producing an optical transmission fiber comprising depositing a pure fused silica layer onto the inner surface of a pipe of doped fused silica containing F and melting and spinning said pipe into a fiber.
- 4. The process for producing an optical transmission fiber of claim 1, wherein said fiber exhibits a refractive index which varies between the periphery and the central longitudinal axis of said fiber, said variation being symmetrical with respect to the central longitudinal axis of the fiber.
- 5. The process for producing an optical transmission fiber of claim 2, wherein said fiber exhibits a refractive index which varies between the periphery and the central longitudinal axis of said fiber, said variation being symmetrical with respect to the central longitudinal axis of the fiber.
- 6. The process for producing an optical transmission fiber of claim 3, wherein said fiber exhibits a refractive index which varies between the periphery and the central longitudinal axis of said fiber, said variation being symmetrical with respect to the central longitudinal axis of the fiber.
- 7. The process for producing an optical transmission fiber of claim 1, wherein said process comprises after said depositing, heating and melting said layer deposited on said pipe in a vacuum to eliminate gas bubbles.
- 8. The process for producing an optical transmission fiber of claim 1, wherein said process comprises after the deposition, heating and melting said deposited layer on said pipe while applying supersonic waves to said layer to eliminate gas bubbles therefrom.
- 9. The process for producing an optical transmission fiber of claim 2, wherein said process comprises after said inserting, heating and melting said rod in a vacuum to eliminate gas bubbles.
- 10. The process for producing an optical transmission fiber of claim 2, wherein said process comprises, after the inserting, heating and melting said rod while applying supersonic waves thereto to eliminate gas bubbles therefrom.
- 11. The process for producing an optical transmission fiber of claim 3, wherein said process comprises after said depositing, heating and melting said layer deposited on said pipe in a vacuum to eliminate gas bubbles.
- 12. The process for producing an optical transmission fiber of claim 3, wherein said process comprises after the deposition, heating and melting said deposited layer on said pipe while applying supersonic waves to said layer to eliminate gas bubbles therefrom.
Priority Claims (2)
Number |
Date |
Country |
Kind |
47-118345 |
Nov 1972 |
JPX |
|
47-118346 |
Nov 1972 |
JPX |
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Parent Case Info
This application is a Continuation Application of Ser. No. 648,997, filed Jan. 14, 1976, now U.S. Pat. No. 4,161,505 in turn a Divisional Application of Ser. No. 419,011, filed Nov. 26, 1978, now abandoned.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3659915 |
Maurer et al. |
May 1972 |
|
3784386 |
Araujo et al. |
Jan 1974 |
|
3806224 |
MacChesney et al. |
Apr 1974 |
|
4161505 |
Shiraishi et al. |
Jul 1979 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
419011 |
Nov 1973 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
648997 |
Jan 1976 |
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