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AssigneeUniversity of Southampton
InventorsLewis Glynn CARPENTER, Sam Adam BERRY, Corin Barry Edmund GAWITH, Peter George Robin SMITH
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A method for fabricating an optical waveguide comprises: providing a sample of lithium niobate doped with magnesium oxide and having at least one grating of periodic domain inversion defined therein; applying a layer of metallic zinc to a surface of the sample over the at least one grating using sputter deposition; heating the sample in an atmosphere of pure oxygen to cause the zinc to indiffuse into the lithium niobate to form a waveguiding layer of increased refractive index under the surface of the sample; and using a dicing blade to cut two substantially parallel channels along a length direction of the at least one grating, to define a ridge waveguide between the two channels.
A method for fabricating an optical waveguide, the method comprising:
An optical device comprising at least one ridge waveguide formed in periodically poled lithium niobate doped with magnesium oxide, the at least one ridge waveguide defined between two substantially parallel channels cut into the periodically poled lithium niobate along an optical propagation direction of the periodic poling by a dicing blade, and the periodically poled lithium niobate having an indiffused layer of zinc to provide optical confinement in the at least one ridge waveguide in a direction orthogonal to the optical propagation direction and to a width of the at least one ridge waveguide defined by a spacing of the parallel channels.
Dependencies are inferred from the claim text.