Patents by Inventor Sigfried Fleischer

Sigfried Fleischer 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).

  • Circulator cable for use with a pluggable optical time domain reflectometer
    Patent number: 12723946
    Abstract: A circulator cable configured to couple an optical time domain reflectometer (OTDR) to an optical fiber span under test is provided. The circulator cable includes a bandpass optical filter configured to be coupled to an optical input port of the OTDR; and a directional optical coupling device coupled to the bandpass optical filter and an optical output port of the OTDR and configured to direct propagation of an optical probe signal generated by the OTDR from the optical output port toward the optical fiber span under test and direct reflections attributed to the optical probe signal from the optical fiber span under test into the bandpass pass optical filter.
    Type: Grant
    Filed: May 26, 2023
    Date of Patent: September 1, 2026
    Assignee: II-VI Delaware, Inc.
    Inventors: Ian Peter McClean, Sigfried Fleischer, Vincent Ouyang
  • Circulator Cable for Use with a Pluggable Optical Time Domain Reflectometer
    Publication number: 20240385079
    Abstract: A circulator cable configured to couple an optical time domain reflectometer (OTDR) to an optical fiber span under test is provided. The circulator cable includes a bandpass optical filter configured to be coupled to an optical input port of the OTDR; and a directional optical coupling device coupled to the bandpass optical filter and an optical output port of the OTDR and configured to direct propagation of an optical probe signal generated by the OTDR from the optical output port toward the optical fiber span under test and direct reflections attributed to the optical probe signal from the optical fiber span under test into the bandpass pass optical filter.
    Type: Application
    Filed: May 26, 2023
    Publication date: November 21, 2024
    Inventors: Ian Peter McClean, Sigfried Fleischer, Vincent Ouyang