Method for the fabrication of optical waveguide devices in photonic crystal fibers and in waveguides with hollow structures
AssigneeOZ Optics Ltd.
InventorsOmur Sezerman, Luis Andre Fernandes, Garland Best, Mi Li Ng, Saidou Kane
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Abstract
There is provided a method to fabricate optical taps and waveguide devices in photonic crystal fibers and other fibers with hollow structures. The method involves a preparation step, where the hollow holes inside the fiber are collapsed or partially modified locally; and a waveguide fabrication step, where a femtosecond laser is focused inside the fiber and used to produce optical waveguides that interact in the region that was previously modified in the preparation step.
Claims4
A method for making a femtosecond laser fabricated waveguide to couple light from a core of a photonic crystal fiber to a cladding of the photonic crystal fiber, the method comprising the steps of:
- a preparation step in which the photonic crystal fiber is heated in a localized region to modify a region of the core within the localized region;
- and
- a waveguide fabrication step in which a femtosecond laser is focused inside the photonic crystal fiber in order to define a waveguide that interacts with the modified core region;
- wherein the preparation step modifies the region by producing a partial or complete collapse of a hollow structure surrounding the core within the localized region.
Dependencies are inferred from the claim text.