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:
Jun. 18, 2024
Filed:
Dec. 18, 2020
Applicant:
Shin-etsu Chemical Co., Ltd., Tokyo, JP;
Inventors:
Toshiaki Watanabe, Annaka, JP;
Satoru Fukuda, Annaka, JP;
Assignee:
SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 15/20 (2006.01); C30B 15/10 (2006.01); C30B 15/14 (2006.01); C30B 15/30 (2006.01); C30B 29/28 (2006.01); G02F 1/09 (2006.01);
U.S. Cl.
CPC ...
C30B 29/28 (2013.01); C30B 15/10 (2013.01); C30B 15/14 (2013.01); C30B 15/30 (2013.01); G02F 1/093 (2013.01);
Abstract
A bismuth-substituted rare earth iron garnet single crystal suitable for Faraday rotators and optical isolators with reduced insertion loss due to suppressed valence fluctuation of Fe ions is provided. The bismuth-substituted rare earth iron garnet single crystal of the present invention is characterized by the composition formula (TbLnBiMg)(FeGaTiPt)O. In the composition formula above, 0.02≤f≤0.05, 0.02≤{3−(a+b+c)}≤0.08, and −0.01≤{3−(a+b+c)}−{f+5−(d+e+f)}≤0.01. Ln is a rare earth element and may be selected from Eu, Gd, Ho, Tm, Yb, Lu, and Y.