EP0127408A1
Expired / Lapsed
EP
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Optical waveguide fiber
Assignee: Corning Glass Works
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Filing: 1984-05-18
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Granted: —
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Expires: 2004-05-18
Abstract
Abstract The core (19) is surrounded by a layer of cladding material (20) and includes a region (22) of depressed refractive index. The inner radius (ai) of this region (22) is greaterthan zero, and the outer radius (ao) thereof is less than the core radius (a). By appropriately selecting the core index depression (22) characteristics such as radial location, width, depth and shape, a fiber having the desired waveguide dispersion characteristics can be designed. Dispersion minimization over a wide wavelength range can be achieved, without adverse affect on system loss.
Inventors
- 👤 Venkata Adiseshaiah Bhagavatula
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 15:26
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; G; G02; G02B; G02B6/00; G02B6/02; G02B6/02214; G02B6/02219; G02B6/02228; G02B6/02233; G02B6/036; G02B6/03605; G02B6/03611; G02B6/03616; G02B6/03638; G02B6/03644; G02B6/03661; G02B6/03666; G02B6/03688; G02B6/02276
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
A single-mode optical waveguide fiber comprising a core of transparent material having a maximum refractive index n 1 and a radius a, and a layer of transparent cladding material on the outer surface of said core, the refractive index n 2 of said cladding being less than n l . said waveguide being characterized in that said core comprises a central portion surrounded by at least two concentric segments, said central portion and the innermost of said concentric segments being separated by a region of depressed refractive index and each two adjacent segments being separated by a region of depressed refractive index, the inner radius a i of the innermost of said regions of depressed refractive index being greater than zero and the maximum radius a of the outermost of said regions of depressed refractive index being less than a, and said cladding optionally comprising a region of depressed refractive index adjacent the outer surface of said core.
Claim 2
Dependent Claim
158 words
A single-mode optical waveguide fiber comprising a core of transparent material having a maximum refractive index n 1 and a radius a, and a layer of transparent cladding material on the outer surface of said core, the refractive index n 2 of said cladding being less than n l . said waveguide being characterized in that said core comprises a central portion surrounded by at least two concentric segments, said central portion and the innermost of said concentric segments being separated by a region of depressed refractive index and each two adjacent segments being separated by a region of depressed refractive index, the inner radius a i of the innermost of said regions of depressed refractive index being greater than zero and the maximum radius a of the outermost of said regions of depressed refractive index being less than a, and said cladding optionally comprising a region of depressed refractive index adjacent the outer surface of said core.
Claim 3
Dependent Claim
26 words
An optical waveguide in accordance with claim 1 wherein the maximum refractive index of said central portion and of each of said segments is the same.
Claim 4
Dependent Claim
26 words
An optical waveguide in accordance with claim 1 wherein the maximum refractive indices of said central portion and of said segments are not all the same.
Claim 5
Dependent Claim
22 words
An optical waveguide in accordance with claim 1 wherein the refractive indices of said regions of depressed refractive index are the same.
Claim 6
Dependent Claim
23 words
An optical waveguide in accordance with claim 1 wherein the refractive indices of said regions of depressed refractive index are not the same.
Claim 7
Dependent Claim
29 words
An optical waveguide in accordance with claim 1 wherein the composite refractive index of said central portion, said segments and said annular regions of depressed refractive index is sinusoidal.
Claim 8
Dependent Claim
26 words
An optical waveguide in accordance with claim 6 wherein said sinusoidal composite refractive index variation of said core is superimposed on a radially decreasing base value.
Claim 9
Dependent Claim
26 words
An optical waveguide in accordance with claim 6 wherein said sinusoidal composite refractive index variation of said core is superimposed on a radially increasing base value.
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