LIGHT BRANCHING OPTICAL WAVEGUIDE

摘要

A light branching optical waveguide comprising at least one incident light waveguide (A) optically connected with one end of a multi-mode optical waveguide, and output light waveguides (B) larger in number than the incident light waveguide (A) optically connected with the other end thereof, characterized in that the intensity distribution of a light incident from at least one optical waveguide (a) out of the incident light waveguide (A) to the multi-mode optical waveguide at the connection surfaces of the incident light waveguide (A) and the multi-mode optical waveguide is asymmetrical with respect to the geometrical center axis of the optical waveguide (a), and the extension of the geometrical center axis of the optical waveguide (a) does not agree with the geometrical center axis of the multi-mode optical waveguide. Providing a low-loss light branching optical waveguide small in branching loss and branching ratio can further offer a light branching optical waveguide being small in wavelength dependency in addition to having reduced variations in branching loss and branching ratio.