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US 5,729,645 AGranted
Graded index optical fibers
AssigneeThe Trustees of the University of Pennsylvania
InventorsA. F. Garito, Rui-Fang Shi, Chris Koeppen, Weidong Chen
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Abstract
Optical fibers having novel refractive index profiles are disclosed. Optical fibers in accordance with the invention are especially useful for application in telecommunication applications such as networks. Processes for the preparation of optical fibers are also disclosed.
Claims29
An optical fiber comprising:
- an inner core;
- an outer core on the inner core;
- and
- a cladding layer on the outer core;
- wherein:
- the inner core has a refractive index which is greater than the refractive index of the outer core;
- the outer core has a refractive index which decreases smoothly, monotonically and nonlinearly with increasing radius from the boundary of the inner core and the outer core to the boundary of the inner core and the cladding layer;
- there is a step in the refractive index at the boundary of the inner core and the outer core;
- and
- the cladding layer has a refractive index which is greater than or equal to the lowest refractive index of the outer core.
7 more elements
An optical waveguide comprising:
- an inner core layer;
- an outer core layer;
- and
- a cladding layer;
- wherein:
- the inner core layer has a refractive index which is greater than the refractive index of the outer core;
- the outer core layer has a refractive index which decreases smoothly, monotonically and nonlinearly with increasing radius from the boundary of the inner core layer and the outer core layer to the boundary of the inner core layer and the cladding layer;
- there is a step in index of refraction at the boundary of the inner core and outer core layers;
- and
- the cladding layer has a refractive index which is greater than or equal to the lowest refractive index of the outer core.
7 more elements
An optical conduit comprising:
- an inner core;
- an outer core;
- and
- a cladding layer;
- wherein:
- the inner core has a refractive index which is greater than the refractive index of the outer core;
- the outer core layer has a refractive index which decreases smoothly, monotonically and nonlinearly with increasing radius from the boundary of the inner core layer and the outer core layer to the boundary of the inner core layer and the cladding layer;
- there is a step in index of refraction at the boundary of the inner core and outer cores;
- and
- the cladding layer has a refractive index which is greater than or equal to the lowest refractive index of the outer core.
7 more elements
Dependencies are inferred from the claim text.