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:
Mar. 30, 2010
Filed:
Aug. 20, 2007
Jungo Kondo, Nishikamo-Gun, JP;
Osamu Mitomi, Nagoya, JP;
Kenji Aoki, Ichinomiya, JP;
Yuichi Iwata, Nagoya, JP;
Tetsuya Ejiri, Kasugai, JP;
Jungo Kondo, Nishikamo-Gun, JP;
Osamu Mitomi, Nagoya, JP;
Kenji Aoki, Ichinomiya, JP;
Yuichi Iwata, Nagoya, JP;
Tetsuya Ejiri, Kasugai, JP;
NGK Insulators, Ltd., Nagoya-Shi, JP;
Abstract
An optical modulator is provided for modulating light propagating in a three-dimensional optical waveguideby applying a voltage thereto. The optical modulator has the three-dimensional optical waveguideincluding at least one pair of branch optical waveguidesand, a multiplexing partof the branch optical waveguides and an emission partprovided in the downstream of the multiplexing part, modulation electrodesA,B andfor applying a signal voltage for modulating light propagating in the three-dimensional optical waveguide, and guiding waveguidesA andB for guiding primary mode light from the multiplexing part. Thickness of the substrate is 20 μm or less at least under the modulation electrodes, and an operation point of the optical modulator is controlled by changing, based on light output from the guiding waveguides, DC bias applied onto the modulation electrodes.