SEMICONDUCTOR OPTICAL WAVEGUIDE PARTS

摘要

PURPOSE:To provide the semiconductor optical waveguide parts having optical amplifier parts constructed to enable high optical amplification. CONSTITUTION:These semiconductor optical waveguide parts are constituted by providing a lower waveguide layer 6a and upper waveguide 6b which are the same in layer thickness as each other above and below the active layer 11 of the optical amplifier part B1 (B2) and interposing the optical amplifier part B1 (B2) which is set with the boundary face between the lower waveguide layer 6a and a lower clad layer 5 at the same level as the boundary face between the waveguide layer of the optical waveguide part and the lower clad layer 5 and is set with the boundary face between the upper waveguide layer 6b and an upper clad layer 7 at the same level as the boundary face between the waveguide layer 6 of the optical waveguide part and the upper clad layer 7.