Patents by Inventor Roman T. Rowinski

Roman T. Rowinski 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).

  • Free-space integrated photodetector with reduced phase tracking error
    Patent number: 7783138
    Abstract: A Mach-Zehnder (MZ) interferometer modulator structure for fiberoptic telecommunications is disclosed in which drift of the operating point can be monitored with a reduced phase tracking error. One or more components of free-space light radiated into the substrate of the MZ modulator are selectively detected with one or more photodetectors. Suitable summing circuits are described for nulling out undesired photocurrent contributions in the photodetector(s) from on-state and off-state light radiated from the MZ.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: August 24, 2010
    Assignee: JDS Uniphase Corporation
    Inventors: Roman T. Rowinski, Gregory J. McBrien, Karl Kissa, Eric Lim
  • Free-Space Integrated Photodetector With Reduced Phase Tracking Error
    Publication number: 20090129719
    Abstract: A Mach-Zehnder (MZ) interferometer modulator structure for fiberoptic telecommunications is disclosed in which drift of the operating point can be monitored with a reduced phase tracking error. One or more components of free-space light radiated into the substrate of the MZ modulator are selectively detected with one or more photodetectors. Suitable summing circuits are described for nulling out undesired photocurrent contributions in the photodetector(s) from on-state and off-state light radiated from the MZ.
    Type: Application
    Filed: November 14, 2008
    Publication date: May 21, 2009
    Applicant: JDS Uniphase Corporation
    Inventors: Roman T. Rowinski, Gregory J. McBrien, Karl Kissa, Eric Lim