OPTICAL DEVICE WITH OPTICAL WAVEGUIDE AND MANUFACTURING METHOD THEREOF

摘要

In an optical device of the invention, ions are implanted into at least a portion of an optical waveguide core having a substantially square or rectangular cross-section, and the ion-implanted portion is formed so as to be asymmetrical with respect to each of the vertical and horizontal line passing through the center of the cross-section of the optical waveguide core. Preferably the ion-implanted portion includes a central portion of the square or rectangular cross-section of the optical waveguide core, and is formed along any one of two diagonals.