Patent ID: 8175432
Filing Date: 2012-05-08
Classification: G02B

Abstract:
1. A method of adjusting an optical axis of an optical waveguide element in connecting input waveguide means to the optical waveguide element, the optical waveguide element having an optical waveguide formed on a substrate, the optical waveguide having at least a straight waveguide and a Y-branch waveguide branched from the straight waveguide, and the input waveguide means inputting a light wave to the optical waveguide element, the method comprising the steps of: inputting a wide band wavelength light beam or two or more single-wavelength light beams having different wavelengths to the straight waveguide through the input waveguide means; and adjusting optical axes of the optical waveguide element and the input waveguide means such that light waves output from respective branch arms of the Y-branch waveguide have substantially identical light intensity.