Patents by Inventor Sasha N. Kemmet Oster

Sasha N. Kemmet Oster 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).

  • Advanced drive circuitry for Sagnac interferometric switch utilizing faraday rotation
    Patent number: 9110317
    Abstract: A pre-pulsed magnetic field generation circuit for a fiber-based, magneto-optic (MO) optical modulator or switch for use in an interferometer is provided. The pre-pulsed magnetic field is used to control the amount of rotation in the state of polarization (SOP), and therefore, the ON-OFF extinction ratio. The circuit includes a pair of amplifier circuits that control the current through a coil to generate the pre-pulsed magnetic field. One amplifier controls a magnitude of a steady state portion of the magnetic field, while the other controls both the amplitude and duration of a pre-pulse portion of the magnetic field.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: August 18, 2015
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Sasha N. Kemmet Oster, Jin-Wei Tioh, Mani Mina, Robert J. Weber