US5033815A
Expired / Lapsed
US
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Optical transmission fiber and process for producing the same
Assignee: Sumitomo Electric Industries Ltd
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Filing: 1990-04-27
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Granted: 1991-07-23
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Expires: 2010-04-27
Abstract
Abstract An optical transmission fiber comprising (1) a core of high refractive index composed of SiO 2 -based glass containing at least one of GeO 2 , As 2 O 3 , Sb 2 O 5 , SnO 2 , TiO 2 , PbO and Bi 2 O 3 , (2) a clad of low refractive index composed of SiO 2 -based glass containing at least one of F, F/B 2 O 3 and F/P 2 O 5 , and (3) an outermost jacket layer composed of SiO 2 and/or SiO 2 -based glass containing at least one of Al 2 O 3 , TiO 2 , ZrO 2 and HfO 2 .
Inventors
- 👤 Takao Edahiro
- 👤 Shiro Kurosaki
- 👤 Minoru Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:01
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/44; G02B6/4401; G02B6/4429; G02B6/44382; C; C03; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/018; C03C; C03C13/00; C03C13/04; C03C13/045; C03B2201/00; C03B2201/02; C03B2201/06; C03B2201/08; C03B2201/12; C03B2201/14; C03B2201/20; C03B2201/28; C03B2201/30; C03B2201/31; C03B2201/32; C03B2201/40; C03B2201/42; C03B2203/00; C03B2203/10; C03B2203/22
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
112 words
An optical transmission fiber comprising: (1) a core section having a high refractive index comprising a GeO 2 -SiO 2 glass or Sb 2 O 3 -SiO 2 glass, (2) a cladding section having a low refractive index consisting of a F-SiO 2 glass, a F-P 2 O 5 -SiO 2 glass, or a F-B 2 O 3 -SiO 2 glass, and (3) an outermost jacket layer comprising a glass selected from the group consisting of SiO 2 , Al 2 O 3 , Al 2 O 3 , Al 2 O 3 -SiO 2 , TiO 2 -SiO 2 , ZrO 2 -SiO 2 , or HfO 2 -SiO 2 .
Claim 2
Dependent Claim
112 words
An optical transmission fiber comprising: (1) a core section having a high refractive index comprising a GeO 2 -SiO 2 glass or Sb 2 O 3 -SiO 2 glass, (2) a cladding section having a low refractive index consisting of a F-SiO 2 glass, a F-P 2 O 5 -SiO 2 glass, or a F-B 2 O 3 -SiO 2 glass, and (3) an outermost jacket layer comprising a glass selected from the group consisting of SiO 2 , Al 2 O 3 , Al 2 O 3 , Al 2 O 3 -SiO 2 , TiO 2 -SiO 2 , ZrO 2 -SiO 2 , or HfO 2 -SiO 2 .
Claim 3
Dependent Claim
26 words
An optical transmission fiber according to claim 1, wherein the fluorine containing-SiO 2 glass of the cladding section is produced by utilizing a high frequency plasma.
Claim 4
Dependent Claim
25 words
An optical transmission fiber as in claim 1, wherein the refractive index difference (Δn) between the core section and the cladding section is about 2%.
Claim 5
Dependent Claim
48 words
An optical transmission fiber as in claim 1, comprising: (1) a core section of 10 wt. % GeO 2 -SiO 2 glass, (2) a cladding section of 2.5 wt. % F-SiO 2 glass, and (3) an outermost jacket layer of 5 wt. % TiO 2 -SiO 2 glass.
Claim 6
Dependent Claim
25 words
An optical transmission fiber as in claim 4, wherein the refractive index difference (Δn) between the core section and the cladding section is about 2%.
Claim 7
Dependent Claim
60 words
An optical transmission fiber as in claim 1 comprising: (1) a core section of 10 to 12 wt. % GeO 2 -SiO 2 glass, (2) a cladding section of 2.5 to 3 wt. % F-SiO 2 glass, and (3) an outermost jacket layer of an SiO 2 -glass or a 3 to 5 wt. % TiO 2 -SiO 2 glass.
Claim 8
Dependent Claim
25 words
An optical transmission fiber as in claim 6, wherein the refractive index difference (Δn) between the core section and the cladding section is about 2%.
Claim 9
Dependent Claim
31 words
An optical transmission fiber as in claim 1, wherein the jacket contains a dopant to provide a jacket with a viscosity substantially the same as that of the core or cladding.
Claim 10
Dependent Claim
47 words
An optical transmission fiber as in claim 1, wherein the refractive index of the jacket is selected at a value higher than that of the cladding, and the thermal expansion coefficient of the jacket is selected at a value lower than that of the core or cladding.
Claim 11
Dependent Claim
34 words
An optical transmission fiber as in claim 1, wherein the jacket has a low thermal expansion coefficient and a viscosity equal to or less than that of the core or cladding during melt-spinning process.
Claim 12
Dependent Claim
45 words
An optical transmission fiber as in claim 1, wherein the jacket comprises an inner SiO 2 glass layer and an outer SiO 2 -based glass layer containing at least one of Al 2 O 3 , TiO 2 , ZrO 2 and HfO 2 .
Claim 13
Dependent Claim
20 words
An optical transmission fiber as in claim 1, wherein the jacket contains a transition metal to provide a light-absorbing function.
Claim 14
Dependent Claim
27 words
An optical transmission fiber as in claim 1, wherein, except for refractive index, the physical properties of the core match those of the cladding and the jacket.
Claim 15
Dependent Claim
22 words
An optical transmission fiber as in claim 1, wherein the ratio of core diameter of the jacket is from 0.62 to 0.71.
Claim 16
Dependent Claim
21 words
An optical transmission fiber according to claim 1, wherein the cladding section is a F-P 2 O 5 -SiO 2 glass.
Claim 17
Dependent Claim
21 words
An optical transmission fiber according to claim 1, wherein the cladding section is a F-B 2 O 3 -SiO 2 glass.
Claim 18
Dependent Claim
17 words
An optical transmission fiber according to claim 1, wherein the cladding section is a F-SiO 2 glass.
Claim 19
Dependent Claim
64 words
An optical transmission fiber comprising: (1) a core section of 12 wt. % GeO 2 -SiO 2 glass having a high refractive index, (2) a cladding section of 2.5 wt. % F-2 wt. % P 2 O 5 -SiO 2 glass having a low refractive index, and (3) an outermost jacket layer of SiO 2 or 5 wt. % TiO 2 -SiO 2 .
Claim 20
Dependent Claim
64 words
An optical transmission fiber comprising: (1) a core section of 12 wt. % GeO 2 -SiO 2 glass having a high refractive index, (2) a cladding section of 2.5 wt. % F-2 wt. % P 2 O 5 -SiO 2 glass having a low refractive index, and (3) an outermost jacket layer of SiO 2 or 5 wt. % TiO 2 -SiO 2 .
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |