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US 12,072,521 B2Granted
Optical fiber with low thermo-optic coefficient
AssigneesThe Board of Trustees of the University of Illinois, Clemson University
InventorsPeter D. Dragic, John Ballato, Thomas W. Hawkins
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Abstract
A fiber includes a core and cladding, both of which may have temperature dependent indices of refraction. The materials and size of the core and cladding may be selected such that as the temperature of the core and/or cladding is heated above room temperature, the fiber transitions from supporting multimode optical waveguiding to supporting single mode waveguiding.
Claims16
A fiber including:
- a cladding;
- and
- a core, wherein:
- the core and cladding are formed to support multimode guiding at about room temperature and fewer modes guided at a guiding temperature above room temperature,
- the fiber includes a bend with bending loss, and
- the bending loss over the bend for a higher order mode increases with a fiber temperature above room temperature, and the bending loss over the bend increases disproportionately with temperature for the higher order mode relative to a fundamental mode.
3 more elements
A fiber including:
- a cladding;
- a core surrounded by the cladding,
- the core configured to support propagating light in multiple guided modes at about room temperature, the multiple guided modes including a fundamental mode;
- and
- the core configured to, at a guiding temperature above room temperature, support propagating light in the fundamental mode and cause another mode of the multiple guided modes to not be guided,
- wherein the fiber includes a bend with bending loss, and
- the bending loss over the bend for a higher order mode increases with a fiber temperature above room temperature, and the bending loss over the bend increases disproportionately with temperature for the higher order mode relative to a fundamental mode.
4 more elements
Dependencies are inferred from the claim text.