Optical wavelength multiplexing and dividing device

Abstract

The present invention relates to an optical wavelength multiplexing and dividing device of an array waveguide type diffraction lattice, which is capable of separating and picking up wavelength-multiplexed signals of various wavelengths, which are used in optical transmissions. An input side slab waveguide ( ), a plurality of juxtaposed array waveguides ( ), an output side slab waveguide ( ) and a plurality of optical output waveguides ( ) are connected, in order, to the outgoing sides of a plurality of optical input waveguides ( ), thereby forming a waveguide pattern. The array waveguides ( ) are formed so as to have lengths different from each other to cause the phases of individual lights to be deviated after propagating through the respective array type waveguides ( ), wherein different lights as per wavelength are condensed at the incident ends ( ) of optical output waveguides by passing through the output side slab waveguides ( ) and are outputted through the optical output waveguides ( ). The incident ends ( ) of the optical output waveguides ( ) are provided at a light condensing predicted position of lights of the respective wavelengths where the lights are predicted to be condensed through the output side slab waveguide ( ), and the incident ends ( ) of the optical output waveguides ( ) are provided at a light condensing prediction corrected position where the light condensing position is shifted with respect to the light condensing predicted position.