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:
Apr. 14, 2015
Filed:
Jul. 18, 2013
Applicant:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Inventor:
Tadashi Kishimoto, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/35 (2006.01); B32B 37/14 (2006.01); G02F 1/355 (2006.01);
U.S. Cl.
CPC ...
G02F 1/35 (2013.01); G02F 1/3558 (2013.01); G02F 2001/3548 (2013.01);
Abstract
A wavelength conversion element includes a core formed of a ferroelectric crystal having a periodically poled structure in which first and second domains having mutually inverted directions of spontaneous polarization are alternately aligned side by side, and a cladding covering all side surfaces of the core along a light propagation direction and having a uniform refractive index. Boundary surfaces of the first and second domains are arranged in a non-parallel manner with respect to the light propagation direction.