Patents by Inventor Gary C. Hancsin

Gary C. Hancsin 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).

  • Systems and techniques for reducing group delay ripple in a dispersion compensating grating
    Patent number: 8135490
    Abstract: A technique is described for reducing group delay ripple in a fiber dispersion compensation grating. The grating is mounted into a trimming setup that includes a trimming device and a scanning assembly for causing a region of the grating to be scanned along its length by the trimming device output. The grating is sensitive to the trimming device output, such that exposure to the trimming device output causes a change in the effective refractive index of the scanned region, the amount of change varying as a function of scanning velocity. A region of the grating to be trimmed is selected, and a scanning velocity profile is programmed into the scanning assembly that is calculated to modify the effective refractive index of the selected grating region along its length so as to smooth out group delay ripple in the selected grating region.
    Type: Grant
    Filed: February 22, 2009
    Date of Patent: March 13, 2012
    Assignee: OFS Fitel, LLC
    Inventors: Yaowen Li, Gary C. Hancsin, Carl E. Soccolich
  • Systems and Techniques for Reducing Group Delay Ripple in a Dispersion Compensating Grating
    Publication number: 20090230580
    Abstract: A technique is described for reducing group delay ripple in a fiber dispersion compensation grating. The grating is mounted into a trimming setup that includes a trimming device and a scanning assembly for causing a region of the grating to be scanned along its length by the trimming device output. The grating is sensitive to the trimming device output, such that exposure to the trimming device output causes a change in the effective refractive index of the scanned region, the amount of change varying as a function of scanning velocity. A region of the grating to be trimmed is selected, and a scanning velocity profile is programmed into the scanning assembly that is calculated to modify the effective refractive index of the selected grating region along its length so as to smooth out group delay ripple in the selected grating region.
    Type: Application
    Filed: February 22, 2009
    Publication date: September 17, 2009
    Applicant: OFS FITEL, LLC
    Inventors: Yaowen Li, Gary C. Hancsin, Carl E. Soccolich