US Patent No: 5,673,353
Number of patents in Portfolio can not be more than 2000
Fiber and lens preform with deep radial gradient layer and method of manufacturing same
Stats
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Sep 30, 1997
Issued date -
Jun 7, 1995
filing date -
08/481,820
serial no -
Expired
status
Importance
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Abstract
A fiber preform structure, preferably of an optical glass for use in making fibers and lenses, constructed with a central core of a first material, a surrounding tube of a second material, and a deeply placed bonded layer integrally formed between the core and tube preferably by a heat driven interdiffusion of the first and second materials. The deeply placed interface layer of the resulting preform structure exhibits material characteristics related to the interdiffused material characteristics of the rod and tube materials. The interdiffusion is preferably performed while supporting the combined rod and tube structure. The preform is rotated during heating to maintain the geometric symmetry of the preform and of the interface layer. An encapsulating carrier is used to support the preform in all dimensions during heating.
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First Claim
Related Publications
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International Classification(s)
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- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,643,751 Method for manufacturing optical waveguide | 13 | 1985 | |
| 4,772,302 Optical waveguide manufacture | 15 | 1987 | |
| 4,734,117 Optical waveguide manufacture | 12 | 1987 | |
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| 4,902,324 Method of reproducibly making fiber optic coupler | 24 | 1988 | |
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| 4,477,273 Method of and apparatus for straightening and configuring a preform tube from which lightguide fiber is drawn | 17 | 1982 | |
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| 4,278,459 Method and apparatus for exhausting optical fiber preform tubes | 11 | 1980 | |
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| 4,788,382 Duplex glass preforms for hermetic glass-to-metal compression sealing | 11 | 1987 | |
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| 4,816,216 Interdiffusion resistant Fe--Ni alloys having improved glass sealing | 4 | 1985 | |
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| 4,277,272 Method for the manufacture of a multi-channel fiber optical waveguide | 10 | 1980 | |
| 4,557,561 Doped glass and process for making | 23 | 1983 | |
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| 4,649,085 Cryogenic glass-to-metal seal | 52 | 1984 | |
| 4,726,507 Cryogenic glass-to-metal seal | 7 | 1986 | |
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| 4,383,736 Pressure formed fiber optic connector | 8 | 1980 | |
| 4,722,825 Method of fabricating a metal/ceramic composite structure | 18 | 1987 | |
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| 4,869,743 Method of manufacturing an optical fiber using a preform obtained by collapsing a tube | 5 | 1988 | |
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| 5,067,789 Fiber optic coupling filter and amplifier | 24 | 1991 | |
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| 4,675,038 Glass fibres and optical communication | 9 | 1986 | |
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| 4,346,294 Low profile optical coupling to planar-mounted optoelectronic device | 21 | 1981 | |
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| 4,587,144 Low loss, compression, hermetic glass-to-metal-seal and method | 14 | 1982 | |
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| 4,556,613 Resistant glass in glass-metal seal and cell terminal structure for lithium electrochemical cells | 23 | 1980 | |
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| 4,940,855 Hermetically tight glass-metal housing for semiconductor components and method for producing same | 6 | 1988 | |
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| 4,595,557 Method of increasing hermeticity of metal components of glass/metal and ceramic/metal seals | 3 | 1985 | |
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| 5,048,923 Image fiber, image fiber preform, and manufacturing processes thereof | 10 | 1990 | |
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| 4,548,466 Optical fibre coupling assemblies | 36 | 1983 | |
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| 4,676,817 Method and apparatus for forming a hermetic seal between glass and metal | 11 | 1986 | |
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| 4,925,473 Process and furnace for heat application | 7 | 1988 | |
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| 4,749,396 Method of forming an optical fiber preform | 9 | 1985 | |
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| 5,268,339 Method for in situ tailoring the component of ceramic articles | 13 | 1992 | |
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| 4,960,550 Encapsulation method for hot isostatic pressing | 8 | 1989 | |
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| 4,452,623 Method for producing optical multiple fiber | 4 | 1982 | |
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| 4,264,347 Method of fabricating optical fiber preforms | 25 | 1979 | |
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| 4,593,974 Plastic optical fiber | 20 | 1983 | |
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| 4,678,358 Glass compression seals using low temperature glass | 13 | 1985 | |
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| 4,521,351 Process for producing light-transmitting element of synthetic resin | 10 | 1983 | |
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| 4,377,404 Hermetic glass-to-metal seal and method for making same | 10 | 1981 | |
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| 4,607,189 Cathode ray tube with glass-to-metal seal using silver chloride cement | 2 | 1984 | |
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| 4,822,399 Glass preform for dispersion shifted single mode optical fiber and method for the production of the same | 38 | 1987 | |
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| 4,888,037 Glass to metal sealing process | 6 | 1988 | |
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| 4,928,368 Method of diffusion bonding copper and titanium alloys to produce a projectile | 4 | 1989 | |
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| 4,938,788 Method of producing uniform silica glass block | 8 | 1988 | |
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| 4,277,761 Method of coating metal on a glassy body surface and resulting article | 5 | 1979 | |
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| 5,235,660 Graded polymer optical fibers and process for the manufacture thereof | 36 | 1992 | |
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| 4,389,089 Flexible fiber optical conduit and method of making | 16 | 1980 | |
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| 4,277,716 Glass-to-metal seal construction | 9 | 1979 | |
| 5,235,323 Fire alarm with electric and non-electric annunciators | 3 | 1992 | |