Patents by Inventor Tonnis Koster

Tonnis Koster 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).

  • Transitioning a filter function of a two-port lattice-form planar waveguide optical delay line circuit filter from a start filter function to a target filter function
    Publication number: 20050149593
    Abstract: Optically coherent, two-port, serially cascaded-form optical delay line circuits can realize arbitrary signal processing functions identical to those of FIR digital filters with complex filter coefficients whilst maintaining a maximum optical transmission characteristic of 100%. The invention provides an iterative process for transitioning in a step-wise manner a filter function of an optical delay line circuit filter from a start filter function to a target filter function. The invention also describes a dynamic gain equalizer incorporating an optical delay line circuit filter.
    Type: Application
    Filed: January 5, 2005
    Publication date: July 7, 2005
    Applicant: International Business Machines Corporation
    Inventors: Tonnis Koster, Bert Offrein, Gian Salis