JPS6457212A - Optical coupling parts - Google Patents

Abstract

PURPOSE:To connect an optical fiber array and an optical waveguide at one part by for forming a waveguide pattern which has coupled confluence parts of two branch waveguides which are arranged in parallel, by one piece of curve optical waveguide. CONSTITUTION:A light beam which is emitted from an piece of optical fiber 12a in an input optical fiber array 12 is joined to one by a Y-shaped branch optical confluence waveguide 14 of a multi-branch type, and thereafter, passes through a U-shaped optical waveguide 16 and advances to a Y-shaped optical output branch waveguide 15, and the light beam which is distributed in to eight parts is made incident on eight pieces of optical fibers, and allowed to branch to eight. In such a way, an 8X8 star coupler is constituted. That is, an optical fiber array 11 consisting of the input optical fiber array 12 which is arranged in parallel and the output optical fiber array 13 is connected to one end face of an optical waveguide substrate 17, therefore, the optical fiber extends in one direction. In such a way, the processing of the optical fiber is simplified, optical coupling parts using the waveguide can be miniaturized, and also, a connected part of the waveguide axis and the optical fiber array goes to one part, and the reliability can be improved.