Optisches Halbleiterbauelement mit tiefem Rippenwellenleiter

摘要

Digital optical telecommunication uses optical semiconductor components having a transition region for the expansion of the mode field of a light wave in order to reduce losses when coupling to an optical fibre or an optical waveguide of a supporting plate. An optical semiconductor component (BE1; BE2) contains a deep ridged waveguide (RIDGE) with a surfacing (DS) disposed on a substrate (SUB). The ridged waveguide (RIDGE) has a first (MQW) and a second (BULK) waveguide centre. The first waveguide centre (MQW) contains one or more optically active semiconductor layers. In a first transition region (UB1) the layer thickness of the second waveguide centre (BULK) decreases along a longitudinal direction (L) of the ridged waveguide (RIDGE). As a result, a light wave guided in the optical semiconductor component (BE1; BE2) is diverted into the surfacing (DS) and substrate (SUB) semiconductor material surrounding the waveguide centre, whereby its mode field is expanded.