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. 07, 2015
Filed:
Feb. 15, 2012
Ryouichi Akimoto, Ibaraki, JP;
Shinichirou Gozu, Ibaraki, JP;
Teruo Mozume, Ibaraki, JP;
Hiroshi Ishikawa, Ibaraki, JP;
Ryouichi Akimoto, Ibaraki, JP;
Shinichirou Gozu, Ibaraki, JP;
Teruo Mozume, Ibaraki, JP;
Hiroshi Ishikawa, Ibaraki, JP;
Abstract
An object of the present invention is to realize an optical gate switch of a monolithic integration type which can avoid problems of losses caused by light coupling of a phase modulation unit to a interferometer optical circuit unit, and can be minimized by integration. The optical gate switch according to the present invention includes an optical waveguide wafer in which a quantum well having a phase modulation effect which is generated by an intersubband transition is set as a core layer; a Michelson interferometer formed on the optical waveguide wafer; and a variable light intensity attenuation unit adjusting a light balance of an interferometer in one of reflection side arms of the Michelson interferometer reflection.