Optical power splitter with assistance waveguide

摘要

Disclosed is an optical power splitter that maximizes uniformity of the power split ratio, while minimizing the output differences between channels. The optical power splitter includes a semiconductor substrate; a core layered on the semiconductor substrate, functioning as a transmission medium for optical signals composed of multi-channels according to a wavelength, wherein the core comprises an input waveguide for receiving the optical signals and a plurality of output waveguides for outputting respective portions of the optical signals whose powers are split; a clad for encompassing the core; and a rectilinear assistant waveguide coupled between the input waveguide and a plurality of output waveguides, having a designated width and length to uniformize mode profiles of the multi-channels that are manifested on the output side edge of the rectilinear assistant waveguide.