Contraves Space Ag

Thomas Brunschwiler

Alex Dommann

Jakob J&uuml;tz

Josef Wagner

Reto Holzner

Andreas M&uuml;ndle

The optical waveguide coupler comprises a structure ( ) of a number of elongated narrow optical waveguide strips ( ), which consist respectively of a front area ( ), a center area ( ) and a coupling area ( ). The center area ( ) has respective transition areas ( ) and ( ) to the corresponding area ( ) or ( ). A gap ( ) in the front areas ( ) provided between two adjoining strips ( ) is larger than the thickness of the narrow strips ( ). The front faces ( ) of the front areas ( ), and the front faces of the coupling areas ( ) are embodied to be as smooth as possible, wherein all strips form a stack in the coupling area ( ). The gaps are pits which result from etching of an Si substrate with the aid of a DRIE etching process.

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Arbon, Switzerland

Thomas Brunschwiler