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. 28, 2010
Filed:
Feb. 10, 2006
Hiroyuki Tsuda, Yokohama, JP;
Mitsuhiro Yasumoto, Yokohama, JP;
Hiroyuki Tsuda, Yokohama, JP;
Mitsuhiro Yasumoto, Yokohama, JP;
KEIO University, Tokyo, JP;
Abstract
It is an object of the present invention to provide a multimode interference waveguide type optical switch that has a wide tolerance and that digitally performs switching with respect to a change in an applied voltage or injected current. The multimode interference waveguide type optical switch of the present invention includes an input single-mode waveguide () into which input light is entered, a multimode rectangular slab waveguide () into which light emitted from the input single-mode waveguide is entered, two electrodes () that are arranged in parallel in a waveguide direction on the slab waveguide and that decrease the refractive index of the slab waveguide () disposed thereunder by injecting current or applying voltage, and a plurality of output single-mode waveguides () into which light emitted from the slab waveguide () is entered and from which output light is emitted.