OPTICAL DETECTOR CAPABLE OF DETECTING WAVELENGTH AND OPTICAL CURRENT SIMULTANEOUSLY

摘要

PURPOSE: An optical detector capable of detecting wavelength and optical current simultaneously is provided to measure wavelength of various input light sources and optical current simultaneously by growing a plurality of InGaAsP optical absorption layers having different band gaps to have wider optical absorption wave length band width. CONSTITUTION: An optical detector capable of detecting wavelength and optical current simultaneously includes a plurality of InGaAsP optical absorption layers(10) having different band gaps, a clad layer, a InGaAs optical absorption layer(7) and a clad layer stacked on an electronic InP semiconductor substrate(6) in sequence and an upper hole type resistant contact metal layer(2) additionally contacting the clad layer on the InGaAsP optical absorption layers, so that optical current according to the strength of partial light beams radiated from an optical fiber is measured by the upper hole type resistant contact metal layer and a middle hole type resistant contact metal layer(8) and the wave length of the remaining light beams is measured by the middle hole type resistant contact metal layer and a lower electronic resistant contact metal layer(5).