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:
Sep. 14, 2004
Filed:
Aug. 23, 2002
Applicant:
Inventors:
Mitsutoshi Honda, Hitachi, JP;
Takashi Naito, Mito, JP;
Tatsuya Sugita, Takahagi, JP;
Masahiko Ando, Kokubunji, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F 1/295 ; G02B 6/26 ; G02B 6/42 ; G02B 6/00 ;
U.S. Cl.
CPC ...
G02F 1/295 ; G02B 6/26 ; G02B 6/42 ; G02B 6/00 ;
Abstract
An optical switch includes at least one light-receiving core for receiving an optical signal, a plurality of light-emitting cores which are used selectively for emitting the optical signal, and a plurality of waveguides connecting the light-receiving core and the plurality of light-emitting cores. A nonlinear optical element which, when pumped, changes its refractive index by 2% or above relative to the surroundings to control a traveling direction of the optical signal is disposed near at least one of the plurality of waveguides.