OPTICAL MODE AMPLITUDE CONVERTER AND FABRICATION METHOD THEREOF

摘要

PURPOSE: An optical mode amplitude converter and a fabrication method thereof are provided, which has low reflection loss and low coupling loss and has a simple fabrication process. CONSTITUTION: An input optical waveguide(11) receiving an optical signal from an input optical fiber and an output optical waveguide(13) outputting an optical signal of converted mode amplitude to an output optical waveguide integrated circuit are integrated on an InP semiconductor substrate(1) by intervening a space region(14) in sequence. And a unilateral side-tapered optical waveguide(12) is integrated on the input optical waveguide and is tapered so that a width of a joint surface with the input optical waveguide becomes wider toward the direction of a light propagation, and converts a mode amplitude of the optical signal applied from the input optical waveguide adiabatically and then applies it to the output optical waveguide.