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. 30, 2003
Filed:
Mar. 19, 2001
Kerry I. Litvin, Huntingdon Valley, PA (US);
General Instrument Corporation, Horsham, PA (US);
Abstract
An optical device which monolithically integrates a variety of structures to route or demultiplex data. One or more ring resonators are used to couple a control signal into and out of a waveguide loop residing within the optical device. The device includes a waveguide loop interferometer, such as a Sagnac loop, and a nonlinear element, such as a semiconductor optical amplifier, inserted in the loop. A ring resonator removes the control signal from the waveguide loop after it passes through the nonlinear element. The control signal is removed via a path that is independent of paths used for managing the flow of data through the optical device. Data is selectively outputted from one of two output ports, depending upon the state of the nonlinear device, as determined by the control signal.