US3884550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Germania containing optical waveguide
Assignee: Corning Glass Works
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Filing: 1973-01-04
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Granted: 1975-05-20
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Expires: 1993-01-04
Abstract
Abstract An optical waveguide having a cladding layer formed of high purity glass and a core of high purity germania containing glass having an index of refraction above that of the cladding layer, said high purity germania containing glass having a cation impurity level not exceeding 10 parts per million of transition elements and a germania content in excess of 15 percent by weight.
Inventors
- 👤 Robert D Maurer
- 👤 Peter C Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:51
CPC Classifications
C; C03; C03C; C03C13/00; C03C13/04; C03C13/048; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/018; C03C13/045; C03C13/046; G; G02; G02B; G02B6/00; G02B6/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
82 words
AN OPTICAL FIBER COMPRISING A CLADDING LAYER FORMED OF HIGH PURITY GLASS, AND A CORE OF HIGH PURITY GERMANIA CONTAINING GLASS HAVING AN INDEX OF REFRACTION ABOVE THAT OF THE CLADDING LAYER, SAID HIGH PURITY GERMANIA CONTAINING GLASS HAVING A CATION IMPURITY LEVEL NOT EXCEEDING TEN PARTS PER MILLION OF TRANSITION ELEMENTS AND A GERMANIA CONTENT IN EXCESS OF 15% BY WEIGHT, SAID OPTICAL FIBER HAVING LIGHT ATTENUATION OF LESS THAN ABOUT 80 DB/KM AT THE UTILIZATION WAVELENGTH OR WAVELENGTHS OF LIGHT.
Claim 2
Dependent Claim
82 words
AN OPTICAL FIBER COMPRISING A CLADDING LAYER FORMED OF HIGH PURITY GLASS, AND A CORE OF HIGH PURITY GERMANIA CONTAINING GLASS HAVING AN INDEX OF REFRACTION ABOVE THAT OF THE CLADDING LAYER, SAID HIGH PURITY GERMANIA CONTAINING GLASS HAVING A CATION IMPURITY LEVEL NOT EXCEEDING TEN PARTS PER MILLION OF TRANSITION ELEMENTS AND A GERMANIA CONTENT IN EXCESS OF 15% BY WEIGHT, SAID OPTICAL FIBER HAVING LIGHT ATTENUATION OF LESS THAN ABOUT 80 DB/KM AT THE UTILIZATION WAVELENGTH OR WAVELENGTHS OF LIGHT.
Claim 3
Dependent Claim
14 words
The fiber of claim 1 wherein the core is formed of substantially pure germania.
Claim 4
Dependent Claim
36 words
The fiber of claim 1 wherein the high purity germania containing glass consists essentially of more than 15 up to 100 percent by weight germania and 0 up to less than 85 percent by weight silica.
Claim 5
Dependent Claim
30 words
The fiber of claim 1 wherein said high purity germania containing glass contains from 85 to 100 percent by weight germania and 0 to 15 percent by weight of titania.
Claim 6
Dependent Claim
20 words
The fiber of claim 1 wherein said core of high purity germania containing glass has a gradient index of refraction.
Claim 7
Dependent Claim
16 words
The optical fiber of claim 1 wherein the core has a substantially constant index of refraction.
Claim 8
Dependent Claim
28 words
The optical fiber of claim 1 wherein said cladding layer is formed of high purity glass selected from the group consisting of pure germania and germania containing glass.
Claim 9
Dependent Claim
29 words
The optical fiber of claim 1 wherein said cladding layer is formed of high purity glass selected from the group consisting of pure fused silica and doped fused silica.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |