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:
Dec. 30, 2003
Filed:
Jun. 21, 2000
Kenji Kitamura, Tsukuba, JP;
Yasunori Furukawa, Tsukuba, JP;
Shunji Takekawa, Tsukuba, JP;
Myeongkyu Lee, Tsukuba, JP;
Hideki Hatano, Tsurugashima, JP;
Satoru Tanaka, Tsurugashima, JP;
Takashi Yamaji, Tsurugashima, JP;
Other;
Abstract
A photorefractive material provides a high photosensitivity without reduction. The material comprises a single crystal of terbium (Tb)-doped niobate or tantalate. The single crystal is a single crystal of lithium niobate (LiNbO ) whose molar fraction of [Li O]/([Li O]+[Nb O ]) lies in a range of 0.482 to 0.505, or a single crystal of lithium tantalate (LiTaO ) whose molar fraction of [Li O]/([Li O]+[Ta O ]) lies in a range of 0.482 to 0.505. The amount of terbium added in the photorefractive material ranges from 10 weight ppm to 1000 weight ppm.