International Business Machines Corporation

Illana Massarek

Bert Jan Offrein

Gian-Luca Bona

Roland Germann

Dorothea W Wiesmann

Peter Bloechl

Huub L Salemink

Horst Folkert

An optical device with a defined total device stress (&sgr; ) and a therefrom resulting defined birefringence in order to obtain a well defined optical polarization dependence is proposed. It comprises a lower cladding layer ( ) with a first refractive index (n ), thereon an upper cladding layer ( ) with a second refractive index (n ) and between an optical waveguide core ( ) with a third refractive index (n ) which is bigger than the first refractive index (n ) and the second refractive index (n ). The optical waveguide core ( ) has a waveguide core stress (&sgr; ) resulting from the manufacturing process and the upper cladding layer ( ) is manufactured to have an inherent cladding layer stress (&sgr; ) which together with the waveguide core stress (&sgr; ) results in the total device stress (&sgr; ).

Optical device with a defined total device stress and method for manufacturing it

Growing community of inventors

Thalwil, Switzerland

Illana Massarek