The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 02, 2018
Filed:
Dec. 12, 2017
Oki Electric Industry Co., Ltd., Tokyo, JP;
Photonics Electronics Technology Research Association, Tokyo, JP;
Yousuke Oonawa, Tokyo, JP;
Hideaki Okayama, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
PHOTONICS ELECTRONICS TECHNOLOGY RESEARCH ASSOCIATION, Tokyo, JP;
Abstract
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.