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US 6,661,957 B1Granted
Diffusion barriers for holey fibers
OwnerMarc David Levenson, Rodney Trevor Hodgsoninventors
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Abstract
A diffusion barrier attached to the cladding layer prevents significant diffusion of a Raman active gas out of the holes in a holey fiber or photonic band gap fiber.
Claims15
An apparatus, comprising;
- an optical fiber having an axis, the optical fiber comprising a solid outer cladding region and a core region, the cladding region surrounding the core region, wherein the core region contains a plurality of holes elongated in the direction of the axis, and wherein at least one hole contains a Raman amplifying gas;
- and
- a diffusion barrier attached to the cladding layer, the diffusion barrier preventing significant diffusion of the Raman active gas out of the holes.
A system, comprising;
- an optical fiber having an axis, the optical fiber comprising a solid outer cladding region and a core region, the cladding region surrounding the core region, wherein the core region contains a plurality of holes elongated in the direction of the axis, and wherein at least one hole contains a Raman amplifying gas;
- and wherein a diffusion barrier is attached to the cladding layer, the diffusion barrier preventing significant diffusion of the Raman active gas out of the holes;
- optical apparatus for introducing light into the fiber;
- optical apparatus for removing light from the fiber;
- an apparatus for introducing Raman pump light into the fiber;
- and
- control means for controlling the apparatus for introducing Raman pump light into the fiber.
4 more elements
Dependencies are inferred from the claim text.