Patents by Inventor Sasha N. Kemmet

Sasha N. Kemmet 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
  • Sagnac interferometric switch utilizing faraday rotation
    Patent number: 8478082
    Abstract: A fiber-based, magneto-optic (MO) optical modulator or switch based on Sagnac interferometry is provided. The system uses a magneto-optic Faraday rotator (MOFR) to produce optical modulation with low magnetic fields. The Sagnac geometry allows for increased modulation at lower fields than traditional MO modulators. This switch uses the MOFR to create different states of polarization in counter-propagating waves, which results in interference at the output port. A magnetic field is used to control the amount of rotation in the state of polarization (SOP), and therefore, the ON-OFF extinction ratio.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: July 2, 2013
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Sasha N. Kemmet, Jin-Wei Tioh, Mani Mina, Robert J. Weber
  • Sagnac Interferometric Switch Utilizing Faraday Rotation
    Publication number: 20110026869
    Abstract: A fiber-based, magneto-optic (MO) optical modulator or switch based on Sagnac interferometry is provided. The system uses a magneto-optic Faraday rotator (MOFR) to produce optical modulation with low magnetic fields. The Sagnac geometry allows for increased modulation at lower fields than traditional MO modulators. This switch uses the MOFR to create different states of polarization in counter-propagating waves, which results in interference at the output port. A magnetic field is used to control the amount of rotation in the state of polarization (SOP), and therefore, the ON-OFF extinction ratio.
    Type: Application
    Filed: July 29, 2010
    Publication date: February 3, 2011
    Applicant: IOWA STATE UNIVERSITY RESEARCH FOUNDATION, INC.
    Inventors: Sasha N. Kemmet, Jin-Wei Tioh, Mani Mina, Robert J. Weber