Patents by Inventor Romanas Narevich

Romanas Narevich 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 and device for optical switching and variable optical attenuation
    Patent number: 7321705
    Abstract: An optical switching device for switching M input signals into N output signals, wherein M and N are each equal to or greater than one, including a mode division multiplexer to join the M input signals into a first multi-mode signal having M initial modes, a mode converter to convert the first multi-mode signal into a second multi-mode signal having N converted modes, and a mode division demultiplexer to separate the second multi-mode signal into the N output signals, wherein the converter is able to be controllably activated such that the N converted modes are separated by the demultiplexer to the N output signals according to a desired scheme.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: January 22, 2008
    Assignee: Optun (BVI) Ltd.
    Inventors: Edvardas Narevicius, Ilya Vorobeichik, Yoav Berlatzky, Romanas Narevich
  • Method and apparatus for optical mode conversion
    Patent number: 7218814
    Abstract: A mode conversion apparatus including a dynamic waveguide section associated with a plurality of control elements that, when activated, are able to produce a periodic refractive-index perturbation pattern in the dynamic waveguide section, wherein the periodic refractive-index perturbation pattern is able to convert at least a fraction of an input signal from a first guided mode of the dynamic waveguide section into a second guided mode of the dynamic waveguide section.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: May 15, 2007
    Assignee: Optun (BVI) Ltd.
    Inventors: Ilya Vorobeichik, Maxim Greenberg, Yoav Berlatzky, Edvardas Narevicius, Romanas Narevich
  • Method and device for optical switching and variable optical attenuation
    Publication number: 20050226552
    Abstract: An optical switching device for switching M input signals into N output signals, wherein M and N are each equal to or greater than one, including a mode division multiplexer to join the M input signals into a first multi-mode signal having M initial modes, a mode converter to convert the first multi-mode signal into a second multi-mode signal having N converted modes, and a mode division demultiplexer to separate the second multi-mode signal into the N output signals, wherein the convener is able to be controllably activated such that the N converted modes are separated by the demultiplexer to the N output signals according to a desired scheme.
    Type: Application
    Filed: May 28, 2003
    Publication date: October 13, 2005
    Inventors: Edvardas Narevicius, Ilya Vorobeichik, Yoav Berlatzky, Romanas Narevich
  • Method and apparatus for optical mode conversion
    Publication number: 20050157979
    Abstract: A mode conversion apparatus including a dynamic waveguide section associated with a plurality of control elements that, when activated, are able to produce a periodic refractive-index perturbation pattern in the dynamic waveguide section, wherein the periodic refractive-index perturbation pattern is able to convert at least a fraction of an input signal from a first guided mode of the dynamic waveguide section into a second guided mode of the dynamic waveguide section.
    Type: Application
    Filed: May 28, 2003
    Publication date: July 21, 2005
    Inventors: Ilya Vorobeichik, Maxim Greenberg, Yoay Berlatzky, Edvardas Narevicius, Romanas Narevich