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. 27, 2011
Filed:
Sep. 01, 2010
Hidemi Tsuchida, Tsukuba, JP;
Hiroshi Ishikawa, Tsukuba, JP;
Takashi Shimoyama, Tsukuba, JP;
Abedin Kazi Sarwar, Koganei, JP;
Tetsuya Miyazaki, Koganei, JP;
Hidemi Tsuchida, Tsukuba, JP;
Hiroshi Ishikawa, Tsukuba, JP;
Takashi Shimoyama, Tsukuba, JP;
Abedin Kazi Sarwar, Koganei, JP;
Tetsuya Miyazaki, Koganei, JP;
Abstract
An optical gate switch circuit includes: an asymmetric Mach-Zehnder interferometer having an optical path that outputs control light and probe light to a second optical directional coupler via a first optical directional coupler and an optical phase modulation element, and another optical path that connects a third optical directional coupler to which the probe light is input, to the second optical directional coupler via a variable optical attenuator and an optical phase shifter; and a bandpass filter connected to the second optical directional coupler.