Patents by Inventor Marcel Zeiler

Marcel Zeiler 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).

  • Patent number: 12283986
    Abstract: An apparatus for determining a wavelength and a power of an input signal is described. The apparatus comprises a memory which stores instructions, which when executed by the processor, cause the processor to: recover a first phase for a first Mach-Zehnder Interferometer MZI; recover a second phase for a second MZI; subtract the first phase from the second phase to provide a phase difference; determine an unwrapped phase difference as a function of wavelength; determine a coarse wavelength; and determine a first wavelength for the first FSR and a second wavelength from the second FSR; and average the first and second wavelengths to determine the wavelength of the input signal.
    Type: Grant
    Filed: March 28, 2023
    Date of Patent: April 22, 2025
    Assignee: KEYSIGHT TECHNOLOGIES, INC.
    Inventors: Marcel Zeiler, Bernd Nebendahl
  • Patent number: 12174509
    Abstract: An optical device having a wavelength measurement section and an SMRS measurement section is disclosed. The wavelength measurement section includes a MZI, which includes first optical waveguides having a first optical path length difference. The wavelength measurement section also includes a second MZI, which includes second optical waveguides having a second optical path length difference. The second optical path length difference is greater than the first optical path length difference. The SMRS includes a filter adapted to suppress a primary laser mode of the second output optical signal and to pass a remaining portion of the second output signal to determine an SMRS based on an optical power of the main laser mode from the wavelength and power measurement stage, and an optical power of the remaining portion of the second output optical signal.
    Type: Grant
    Filed: July 27, 2022
    Date of Patent: December 24, 2024
    Assignee: KEYSIGHT TECHNOLOGIES, INC.
    Inventors: Marcel Zeiler, Bernd Nebendahl
  • Publication number: 20230239046
    Abstract: An apparatus for determining a wavelength and a power of an input signal is described. The apparatus comprises a memory which stores instructions, which when executed by the processor, cause the processor to: recover a first phase for a first Mach-Zehnder Interferometer MZI; recover a second phase for a second MZI; subtract the first phase from the second phase to provide a phase difference; determine an unwrapped phase difference as a function of wavelength; determine a coarse wavelength; and determine a first wavelength for the first FSR and a second wavelength from the second FSR; and average the first and second wavelengths to determine the wavelength of the input signal.
    Type: Application
    Filed: March 28, 2023
    Publication date: July 27, 2023
    Inventors: Marcel Zeiler, Bernd Nebendahl
  • Patent number: 11536610
    Abstract: A photonic integrated circuit (PIC) for determining a wavelength of an input signal is disclosed. The PIC comprises: a substrate; a first Mach-Zehnder Interferometer (MZI) disposed over the substrate, comprising first optical waveguides having a first optical path length difference, and configured to receive a first output optical signal from a light source. The PIC also comprises a second Mach-Zehnder Interferometer (MZI) disposed over the substrate, comprising second optical waveguides having a second optical path length difference, which is greater than the first optical path length difference, and configured to receive a second output optical signal from the light source.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: December 27, 2022
    Assignee: Keysight Technologies, Inc.
    Inventors: Marcel Zeiler, Bernd Nebendahl
  • Publication number: 20220365400
    Abstract: An optical device having a wavelength measurement section and an SMRS measurement section is disclosed. The wavelength measurement section includes a MZI, which includes first optical waveguides having a first optical path length difference. The wavelength measurement section also includes a second MZI, which includes second optical waveguides having a second optical path length difference. The second optical path length difference is greater than the first optical path length difference. The SMRS includes a filter adapted to suppress a primary laser mode of the second output optical signal and to pass a remaining portion of the second output signal to determine an SMRS based on an optical power of the main laser mode from the wavelength and power measurement stage, and an optical power of the remaining portion of the second output optical signal.
    Type: Application
    Filed: July 27, 2022
    Publication date: November 17, 2022
    Inventors: Marcel Zeiler, Bernd Nebendahl
  • Publication number: 20210131873
    Abstract: A photonic integrated circuit (PIC) for determining a wavelength of an input signal is disclosed. The PIC comprises: a substrate; a first Mach-Zehnder Interferometer (MZI) disposed over the substrate, comprising first optical waveguides having a first optical path length difference, and configured to receive a first output optical signal from a light source. The PIC also comprises a second Mach-Zehnder Interferometer (MZI) disposed over the substrate, comprising second optical waveguides having a second optical path length difference, which is greater than the first optical path length difference, and configured to receive a second output optical signal from the light source.
    Type: Application
    Filed: July 30, 2020
    Publication date: May 6, 2021
    Inventors: Marcel Zeiler, Bernd Nebendahl