Oki Electric Industry Co., Ltd.

Photonics Electronics Technology Research Association

Yousuke Oonawa

Hideaki Okayama

The optical waveguide element has a first optical waveguide core; and a second optical waveguide core. In the optical waveguide element, the first optical waveguide core includes a first coupling portion configured to propagate any one polarized wave of a TE polarized wave and a TM polarized wave of a k-order mode, the other polarized wave of an h-order mode, and the other polarized wave of a p-order mode, and a first Bragg reflector connected to the first coupling portion. The second optical waveguide core includes a second coupling portion. The first Bragg reflector includes a rib waveguide including a grating configured to convert the one input polarized wave of the k-order mode into the other polarized wave of the h-order mode, reflect the converted polarized wave on the basis of Bragg reflection, and transmit the other input polarized wave of the p-order mode, and slab waveguides having thicknesses smaller than that of the rib waveguide and integrally formed with the rib waveguide on both side surfaces of the rib waveguide respectively, in the light propagation direction.

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Tokyo, Japan

Yousuke Oonawa