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:
Feb. 06, 2018
Filed:
Jul. 22, 2014
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Nobuo Nakamura, Ome, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
A Faraday rotator excellent in productivity and also hardly causing an isolation function of an optical isolator to deteriorate even when the Faraday rotator is used in a high-power laser with a wavelength of 1.1 μm or less and an output of 1 W or more. The Faraday rotator comprises a non-magnetic garnet substrate; bismuth-substituted rare-earth iron garnet films grown respectively on both surfaces of the non-magnetic garnet substrate by a liquid phase epitaxial method; and sapphire crystal substrates bonded respectively to outer surfaces of the bismuth-substituted rare-earth iron garnet films, and configured to dissipate heat. The bismuth-substituted rare-earth iron garnet films has an absorption coefficient of 9 cmor less for light at a wavelength of 1.06 μm, and that the bismuth-substituted rare-earth iron garnet films grown on the respective surfaces of the non-magnetic garnet substrate differ from each other in film thickness by 10 μm or less.