Patent US1137409A successfully refreshed from Google Patents.
US4822136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single mode optical fiber
Assignee: Viavi Solutions Inc
•
Filing: 1984-06-15
•
Granted: 1989-04-18
•
Expires: 2004-06-15
Abstract
Abstract A single mode optical fiber of stepped index of refraction. Both core and cladding are fabricated of pure fused silica doped with a small base percentage of fluorine to substantially eliminate hydroxyl ions and reduce viscosity. In addition to the base amount of fluorine, the cladding contains a further amount for lowering its index of refraction relative to that of the core and for further reducing viscosity.
Inventors
- 👤 John W. Hicks, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:49
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; C; C03; C03C; C03C13/00; C03C13/04; C03C13/045
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
57 words
A single mode, all glass, optical fiber comprising a core consisting essentially of pure fused silica and fluorine uniformly distributed throughout said core in a given concentration and a cladding consisting essentially of pure fused silica and fluorine uniformly distributed throughout said cladding in a concentration higher than that of said concentration of fluorine in said core.
Claim 2
Dependent Claim
57 words
A single mode, all glass, optical fiber comprising a core consisting essentially of pure fused silica and fluorine uniformly distributed throughout said core in a given concentration and a cladding consisting essentially of pure fused silica and fluorine uniformly distributed throughout said cladding in a concentration higher than that of said concentration of fluorine in said core.
Claim 3
Dependent Claim
24 words
The optical fiber of claim 1 wherein said amount of fluorine in said core is within the range of 0.2 to 0.4 mole percent.
Claim 4
Dependent Claim
26 words
The optical fiber of claim 1 or 2 wherein said amount of fluorine in said cladding is within the range of 0.91 to 1.81 mole percent.
Claim 5
Dependent Claim
34 words
The optical fiber of claim 1 wherein the index of refraction of said core is within the range of 1.4454 and 1.4446 and that of said cladding is lower by between 0.0035 and 0.0069.
References Cited (Backward Citations)
US3778132A
Cited
US4082420A
Cited
US4210386A
Cited
CA1029993A
Cited
US4065280A
Cited
US4206968A
Cited
US4372648A
Cited
US4367013A
Cited
US4557561A
Cited
US4441788A
Cited
US4504114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |