Patents by Inventor Emilio Riccardi

Emilio Riccardi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of and a device for polarization-independent optical demultiplexing
    Patent number: 6661549
    Abstract: This invention concerns a method of and a device for optical demultiplexing that are based on the four wave mixing between the signals to be demultiplexed and pump signals. The two signals are fed into a polarization maintaining fiber (14), which divides them into two components with orthogonal polarization, separated in time; and the four wave mixing is performed separately on the two components, thereby originating two separate signals that are polarization-rotated and re-combined. (FIG. 1).
    Type: Grant
    Filed: November 18, 1999
    Date of Patent: December 9, 2003
    Assignee: Agilent Technologies, Inc.
    Inventors: Riccardo Calvani, Francesco Cisternino, Raffaele Girardi, Emilio Riccardi