An as-deposited waveguide structure is formed by a vapor deposition process without etching of core material. A planar optical device of a lighthouse design includes a ridge-structured lower cladding layer of a low refractive index material. The lower cladding layer has a planar portion and a ridge portion...http://www.google.es/patents/US20030063883?utm_source=gb-gplus-sharePatente US20030063883 - As-deposited planar optical waveguides with low scattering loss and methods for their manufacture
As-deposited planar optical waveguides with low scattering loss and methods ...
