Patent ID: 6961497

Claim:
An optical power splitter comprising a semiconductor substrate, an optical waveguide stacked on the semiconductor substrate, and a clad surrounding the optical waveguide, the optical waveguide functioning as a medium through transmits which an optical signal having a plurality of channels according to wavelengths, the optical waveguide comprising: an input waveguide section having a width through which the optical signal is inputted from an outer waveguide; a first tapered waveguide section having a gradually increasing width; a second tapered waveguide section having a gradually decreasing width; a first and second waveguide branch extending from an output end of the tapered waveguide section and outputting a first and second branched optical signal, respectively; and a stabilizing waveguide section disposed between the input waveguide section and the tapered waveguide section, the stabilizing waveguide section having a length and a width capable of stabilizing a shaking of the optical signal that is generated by a mode mismatch between the optical signal and the input waveguide section, wherein the second tapered waveguide section disposed between said input waveguide section and said stabilizing waveguide section, and the width of the stabilizing waveguide section is a value between 3 and 8 μm.