Photonic crystal fibers
AssigneeBlazephotonics Limited
InventorsPhilip St. John Russell, Timothy Adam Birks, Jonathan Cave Knight
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Abstract
A photonic crystal fiber including a plurality of longitudinal holes (220), in which at least some of the holes have a different cross-sectional area in a first region (200) of the fiber, that region having been heat-treated after fabrication of the fiber, from their cross-sectional area in a second region of the fiber (190), wherein the optical properties of the fiber in the heat-treated region (200) are altered by virtue of the change in cross-sectional area of holes (230) in that region (200).
Claims52
A photonic crystal fiber including a plurality of longitudinal holes, in which at least some of the holes have a different cross-sectional area in a first region of the fiber, that region having been heat-treated after fabrication of the fiber, from their cross-sectional area in a second region of the fiber, wherein the optical properties of the fiber in the heat-treated region are altered by virtue of the change in cross-sectional area of holes in that region.
A method of producing a photonic crystal fiber, including the following steps:
- (a) fabricating a photonic crystal fiber having a plurality of longitudinal holes;
- (b) heat-treating a region of the fiber so that at least some of the holes in that region have a different cross-sectional area from their cross-sectional area in regions of the fiber which have not been heat-treated, the optical properties of the fiber in the heat-treated region being altered by changing the cross-sectional area of holes in that region.
Dependencies are inferred from the claim text.