Focusing device
AssigneeAvanex Corporation
InventorKlaus Satzke
Life of this patent
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Abstract
A focusing device with a refractive index profile changing from the center of the focusing device towards its perimeter, is made of a material wherein the lateral refractive index distribution of the focusing device material is homogeneous and wherein the focusing device comprises holes for introducing a graded refractive index profile. This allows accurate control of the graded refractive index profile.
Claims10
A focusing device with a refractive index profile changing from the center of the focusing device towards its perimeter, wherein a lateral refractive index distribution of the focusing device material is homogeneous and that the focusing device comprises holes for introducing a graded refractive index profile.
A method of fabricating a planar focusing device, wherein a pattern of holes arranged at random in a circular area is defined by nano-imprint or lithography, in particular electron-beam lithography, on a layer structure and that the holes thus defined are etched, in particular by reactive ion etching.
Dependencies are inferred from the claim text.