An optical waveguide circuit is provided that can reduce or eliminate polarization dependence by reducing or eliminating birefringence. A substrate consists of a silicon substrate, and a cladding and a core are composed of silica-based glass. The core has a multilayer structure composed of a few types of layers with different refractive indices such as first core layers and second core layers stacked in the direction parallel to the substrate. As for the birefringence of the waveguide, the geometrical birefringence caused by the multilayer structure is canceled out by the other birefringence, thereby being able to reduce or eliminate the birefringence of the waveguide.

Um circuito ótico do waveguide é contanto que pode reduzir ou eliminar a dependência do polarization reduzindo ou eliminando o birefringence. Uma carcaça consiste em uma carcaça do silicone, e um cladding e um núcleo são compostos do vidro silicone-baseado. O núcleo tem uma estrutura multilayer composta de alguns tipos de camadas com índices refractive diferentes tais como as primeiras camadas do núcleo e as segundas camadas do núcleo empilhadas no sentido paralelo à carcaça. Quanto para ao birefringence do waveguide, o birefringence geométrico causado pela estrutura multilayer é cancelado para fora pelo outro birefringence, desse modo podendo reduzir ou eliminar o birefringence do waveguide.

 
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