SEMICONDUCTOR DEVICE GENERATING TWO WAVELENGTHS

摘要

A semiconductor device for generating at least two radiation beams (1, 2) of preferably different frequency comprises a substrate (3) on which according to the invention at least one LED or laser is provided on each side by epitaxial growth. The radiation beams are preferably parallel to each other and are preferably generated by double hetero junction (DH) lasers. Application in DRAW (Direct Read And Write) and in DOR (Direct Optical Recording) systems.