Optical power splitter with assistance waveguide

An optical power splitter comprising:

• an input waveguide for receiving optical signals composed of multi-channels, wherein the optical signal are received by an input side edge that has a larger width towards an output side edge;
• a first and a second output waveguides, which are extended symmetrically around a central line from an output side edge of the input waveguide;
• and
• a rectilinear assistant waveguide coupled between the input waveguide and the first and the second output waveguides, having a designated width and length to uniformize mode profiles of the multi-channels that are manifested on the output side edge.

An optical power splitter, comprising:

• an input waveguide for receiving optical signals composed of multi-channels according to a wavelength are inputted through an input side edge;
• an oval-shaped slab waveguide;
• a plurality of output waveguides, which are extended symmetrically around a central line from an output side edge of the slab waveguide;
• and
• a rectilinear assistant waveguide coupled between the input waveguide and the slab waveguide, having a designated length and a larger width than the input waveguide.