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US4188089A
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Optical fibers having high infrared transmittancy
Assignee: Schott AG
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Filing: 1977-10-27
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Granted: 1980-02-12
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Expires: 1997-10-27
Abstract
Abstract Optical fibers having high infrared transmittancies are produced by chemical vapor deposition of vitreous layers composed predominantly of anions S, Se and/or Te onto tubes or rods. Cations are Ge, Si, P, B, As, Sb and/or Ti. Conventional CVD techniques are employed to produce stepped-refractive index gradient profiles in the fibers except that an inert gas and/or a halogen(s) is used as the propellant gas.
Inventors
- 👤 Georg Gliemeroth
- 👤 Lothar Meckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:15
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/012; C03B37/014; C03B37/018; C03B37/01807; C03B37/01861; C03C; C03C13/00; C03C13/04; C03C13/041; C03C13/043; G; G02; G02B; G02B6/00; G02B6/10; G02B6/102; C03B2201/00; C03B2201/80; C03B2201/86; C03B2201/88; C03B2207/00; C03B2207/80; C03B2207/85; C03B2207/87; Y; Y10; Y10S; Y10S65/00; Y10S65/15
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
54 words
In an optical fiber having infrared transmittancy, and a refractive index gradient, and which is prepared by chemical vapor deposition, the improvement wherein in the vitreous, light-conducting region of the fiber, the anions are predominantly S, Se, Te or combinations thereof, and the cations are Ge, Si, P, B, Sb, Ti or combinations thereof.
Claim 2
Dependent Claim
54 words
In an optical fiber having infrared transmittancy, and a refractive index gradient, and which is prepared by chemical vapor deposition, the improvement wherein in the vitreous, light-conducting region of the fiber, the anions are predominantly S, Se, Te or combinations thereof, and the cations are Ge, Si, P, B, Sb, Ti or combinations thereof.
Claim 3
Dependent Claim
26 words
The improvement of claim 1 wherein the vitreous, light-conducting region includes additional anions selected from the group consisting of Cl, Br, I, F and combinations thereof.
Claim 4
Dependent Claim
11 words
The improvement of claim 2 wherein the additional anion is chloride.
Claim 5
Dependent Claim
19 words
The improved optical fiber of claim 1 wherein the vitreous, light-conducting region forms the central core of the fiber.
Claim 6
Dependent Claim
23 words
The improved optical fiber of claim 1 wherein the vitreous, light-conducting region forms an annular section surrounding the central core of the fiber.
Claim 7
Dependent Claim
97 words
A method of preparing an improved optical fiber of claim 1 having infrared transmittancy and a refractive index gradient, in which, in the vitreous light-conducting region of the fiber, the anions are predominantly S, Se or Te or combinations thereof, and the cations are Ge, Si, P, B, As, Sb, Ti or combinations thereof the method comprising propelling gaseous halides of the anions and cations into a decomposition region, decomposing the halides and coating the resultant anions and cations onto a glass substrate, wherein the propelling gas is an inert gas, a halogen or a mixture thereof.
Claim 8
Dependent Claim
36 words
The method of claim 6 wherein the anions are coated onto the internal surface of a glass tube, and which further comprises collapsing the tube into a preform rod and drawing the rod into a fiber.
Claim 9
Dependent Claim
38 words
The method of claim 6 wherein the anions and cations are coated onto the exterior surfaces of a glass rod, and which further comprises drawing the rod into a preform and then drawing the rod into a fiber.
Claim 10
Dependent Claim
10 words
The optical fiber prepared by the method of claim 6.
Claim 11
Dependent Claim
19 words
A method of transmitting infrared radiation which comprises conducting said radiation through the improved optical fiber of claim 1.
Claim 12
Dependent Claim
27 words
The optical fiber of claim 1 wherein the anions in the light-conducting region are 60-100% of anions of S, Se, Te or combinations thereof and 40-0% halides.
Claim 13
Dependent Claim
81 words
In an optical fiber having infrared transmittancy, and a refractive index gradient, and which is prepared by chemical vapor deposition, the improvement wherein the anions in the vitreous, light-conducting region of the fiber are predominantly S, Se, Te or combinations thereof and the cations in the vitreous, light-conducting region are Ge, Si, P, B, As, Sb, Ti or combinations thereof; and wherein the relative amounts of cations and anions are limited in accordance with the boundary conditions shown in FIGS. 3a-3i.
Claim 14
Dependent Claim
81 words
In an optical fiber having infrared transmittancy, and a refractive index gradient, and which is prepared by chemical vapor deposition, the improvement wherein the anions in the vitreous, light-conducting region of the fiber are predominantly S, Se, Te or combinations thereof and the cations in the vitreous, light-conducting region are Ge, Si, P, B, As, Sb, Ti or combinations thereof; and wherein the relative amounts of cations and anions are limited in accordance with the boundary conditions shown in FIGS. 3a-3i.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |