Patents by Inventor Nils G. Weimann

Nils G. Weimann 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).

  • Publication number: 20120288286
    Abstract: An optical receiver that uses a coherent optical quadrature-detection scheme to demodulate an amplitude-modulated optical input signal in a manner that enables the use of a free-running optical local-oscillator source. The optical receiver employs a signal combiner that combines, into an electrical output signal, the in-phase and quadrature-phase electrical signals generated as a result of the quadrature detection of the optical input signal. Depending on the frequency offset between the local-oscillator signal and the input signal, the electrical output signal produced by the signal combiner can be a desired baseband signal or an intermediate-frequency signal. The latter signal can be demodulated to recover the baseband signal in a relatively straightforward manner, e.g., using a conventional intermediate-frequency electrical demodulator coupled to the signal combiner.
    Type: Application
    Filed: May 12, 2011
    Publication date: November 15, 2012
    Applicant: ALCATEL-LUCENT USA INC.
    Inventors: Vincent E. Houtsma, Nils G. Weimann
  • Patent number: 7672553
    Abstract: The present invention provides an optical waveguide modulator. In one embodiment, the optical waveguide modulator includes a semiconductor planar optical waveguide core and doped semiconductor connecting paths located adjacent opposite sides of the core and capable of applying a voltage across the core. The optical waveguide core and connecting paths form a structure having back-to-back PN semiconductor junctions. In another embodiment, the optical waveguide modulator includes a semiconductor optical waveguide core including a ridge portion wherein the ridge portion has at least one PN semiconductor junction located therein. The optical waveguide modulator also includes one or more doped semiconductor connecting paths located laterally adjacent the ridge portion and capable of applying a voltage to the ridge portion.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: March 2, 2010
    Assignee: Alcatel-Lucent USA Inc.
    Inventors: Douglas M. Gill, Christopher D. W. Jones, Sanjay Patel, Mahmoud Rasras, Nils G. Weimann
  • Publication number: 20080212913
    Abstract: The present invention provides an optical waveguide modulator. In one embodiment, the optical waveguide modulator includes a semiconductor planar optical waveguide core and doped semiconductor connecting paths located adjacent opposite sides of the core and capable of applying a voltage across the core. The optical waveguide core and connecting paths form a structure having back-to-back PN semiconductor junctions. In another embodiment, the optical waveguide modulator includes a semiconductor optical waveguide core including a ridge portion wherein the ridge portion has at least one PN semiconductor junction located therein. The optical waveguide modulator also includes one or more doped semiconductor connecting paths located laterally adjacent the ridge portion and capable of applying a voltage to the ridge portion.
    Type: Application
    Filed: March 1, 2007
    Publication date: September 4, 2008
    Applicant: Lucent Technologies Inc.
    Inventors: Douglas M. Gill, Christopher D.W. Jones, Sanjay Patel, Mahmoud Rasras, Nils G. Weimann