Patent ID: 7213978

Claim:
An optical structure comprising: a substrate structure having a support layer supporting a core layer of a waveguide structure, said substrate structure being provided with a recess extending below the core layer and adapted to receive an optical or optoelectronic component, wherein the core layer has an uncovered part to provide a waveguide height reference surface part in plane with an upper surface of the core layer of the waveguide, the optical structure further comprising: a carrier structure having a first contact surface part for mounting the optical or optoelectronic component, and a second contact surface part for mounting the carrier structure on the substrate structure, the first and second contact surface parts having well defined relative vertical positions, wherein the first contact surface part is adapted to contact an upper surface part of the optical or optoelectronic component, and the second contact surface part is adapted to rest on the waveguide height reference surface part of the substrate structure to provide vertical alignment between the waveguide core of the substrate structure and the first contact surface part of the camer structure.