Patents by Inventor Peter Thielen

Peter Thielen 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).

  • Patent number: 8922877
    Abstract: A system and method for controlling polarization in a fiber amplifier is disclosed. A polarization dither waveform is applied to a polarization controller so that dithering does not trigger PI-HOMI (Polarization-Induced High Order Mode Instability). The dither waveform may have a period that is much less than the thermal diffusion time across the fiber amplifier core. The dither waveform may also have a slew rate (defined in degrees/second on the Poincaré sphere) that is much slower than the thermal diffusion time across the fiber amplifier core.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: December 30, 2014
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Gregory D. Goodno, Stuart McNaught, Peter Thielen, Joshua Rothenberg, Marty Wacks
  • Patent number: 8254017
    Abstract: A method is provided for forming an optical fiber amplifier. The method comprises providing a composite preform having a gain material core that includes one or more acoustic velocity varying dopants to provide a longitudinally varying acoustic velocity profile along the gain material core to suppress Stimulated Brillouin Scattering (SBS) effects by raising the SBS threshold and drawing the composite preform to form the optical fiber amplifier.
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: August 28, 2012
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Robert R. Rice, Michael G. Wickham, Hiroshi Komine, Peter Livingston, Peter Thielen, Charles Phillip Asman
  • Publication number: 20100238538
    Abstract: A method is provided for forming an optical fiber amplifier. The method comprises providing a composite preform having a gain material core that includes one or more acoustic velocity varying dopants to provide a longitudinally varying acoustic velocity profile along the gain material core to suppress Stimulated Brillouin Scattering (SBS) effects by raising the SBS threshold and drawing the composite preform to form the optical fiber amplifier.
    Type: Application
    Filed: March 19, 2009
    Publication date: September 23, 2010
    Inventors: Robert R. Rice, Michael G. Wickham, Hiroshi Komine, Peter Livinaston, Peter Thielen, Charles Phillip Asman
  • Publication number: 20070217738
    Abstract: A system to remove cladding light from an optical fiber that includes a core and a cladding that surrounds the core. A volume of an index-matching material contacts an exterior surface of the cladding along a contact length of the optical fiber. The index-matching material has a refractive index that substantially matches a refractive index of the cladding at a predetermined clamping temperature and has a refractive index with a negative temperature coefficient, such that the index matching material distributively removes light from the cladding along the contact length based on the temperature of the index matching material that contacts the cladding.
    Type: Application
    Filed: March 16, 2006
    Publication date: September 20, 2007
    Inventors: Jesse Anderegg, Stephen Brosnan, Peter Thielen
  • Publication number: 20070147757
    Abstract: A hollow core photonic bandgap chalcogenide glass fiber includes a hollow core for passing light therethrough, a Raman active gas disposed in said core, a microstructured region disposed around said core, and a solid region disposed around said microstructured region for providing structural integrity to said microstructured region. A coupler can introduce at least one light signal into the hollow core of the chalcogenide photonic bandgap fiber. The method includes the steps of introducing a light beam into a hollow core chalcogenide photonic bandgap glass fiber filled with a Raman active gas disposed in the core, conveying the beam through the core while it interacts with the gas to form a Stokes beam of a typically higher wavelength, and removing the Stokes beam from the core of the fiber.
    Type: Application
    Filed: September 15, 2006
    Publication date: June 28, 2007
    Applicant: The Government of the US, as represented by the Secretary of the Navy
    Inventors: L Shaw, Jasbinder Sanghera, Ishwar Aggarwal, Peter Thielen
  • Publication number: 20070127529
    Abstract: This invention pertains to a scene projection system and a method for projecting a scene that can simulate light temperature of above 2000 K. The system comprises of a light source part for generating light at a lower wavelength; a means part for individually controlling dynamic range, contrast, brightness, temporal characteristics and temporal dynamics of the light; a rare earth doped fiber part that re-emits the output light at a higher wavelength; and a means part for conveying light between its parts. The method comprises steps of generating light at a lower wavelength wavelength; individually controlling temporal characteristics, temporal dynamics, brightness and contrast of the light; passing the light through a rare earth-doped fiber; and re-emitting the light at a higher wavelength.
    Type: Application
    Filed: December 2, 2005
    Publication date: June 7, 2007
    Inventors: Brandon Shaw, Jasbinder Sangtiera, Ishwar Aggarwal, Peter Thielen
  • Publication number: 20060251369
    Abstract: This invention pertains to a glass fiber, a Raman device and a method. The fiber is a hollow core photonic bandgap chalcogenide glass fiber that includes a hollow core for passing light therethrough, a Raman active gas disposed in said core, a microstructured region disposed around said core, and a solid region disposed around said microstructured region for providing structural integrity to said microstructured region. The device includes a coupler for introducing at least one light signal into a hollow core of a chalcogenide photonic bandgap fiber; a hollow core chalcogenide photonic bandgap glass fiber; a microstructured fiber region disposed around said core; a solid fiber region disposed around said microstructured region for providing structural integrity to said microstructured region; and a Raman active gas disposed in the hollow core.
    Type: Application
    Filed: May 3, 2005
    Publication date: November 9, 2006
    Inventors: L. Shaw, Jasbinder Sanghera, Ishwar Aggarwal, Peter Thielen
  • Publication number: 20060210227
    Abstract: This invention pertains to a device for broadening optical wavelength in the 2-14 ?m region comprising a light source and a highly nonlinear chalcogenide fiber associated therewith whereby a light signal is passed from the light source into the fiber wherein and through interactions between the light signal and the material, bandwidth of the light signal is broadened in the 2-14 ?m region.
    Type: Application
    Filed: March 17, 2005
    Publication date: September 21, 2006
    Inventors: Leslie Shaw, Jasbinder Sanghera, Ishwar Aggarwal, Peter Thielen, Fred Kung
  • Patent number: 6928227
    Abstract: This invention pertains to an optical device and method for using a chalcogenide glass waveguide to amplify a pump light beam by means of stimulated Raman scattering and obtaining a depleted pump light beam and an amplified beam at a wavelength higher than the wavelength of the depleted pump light beam.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: August 9, 2005
    Inventors: L. Brandon Shaw, Jasbinder S. Sanghera, Peter Thielen, Ishwar D. Aggarwal
  • Publication number: 20030012491
    Abstract: This invention pertains to an optical device and method for using a chalcogenide glass waveguide to amplify a pump light beam by means of stimulated Raman scattering and obtaining a depleted pump light beam and an amplified beam at a wavelength higher than the wavelength of the depleted pump light beam.
    Type: Application
    Filed: July 12, 2001
    Publication date: January 16, 2003
    Inventors: L. Brandon Shaw, J. S. Sanghera, Peter Thielen, Ishwar D. Aggarwal
  • Patent number: 4671960
    Abstract: A natural flea repellent herbal composition using the dry, finely chopped solids of pennyroyal, eucalyptus, and camomile with a small amount of oil of pennyroyal, eucalyptus, and citronella for increased effect.A method for production of a material receptical used as a pet collar.An apparatus for the insertion of the natural flea repellent herbal composition within the material receptical.
    Type: Grant
    Filed: July 25, 1986
    Date of Patent: June 9, 1987
    Inventors: Peter Thielen, Carol A. Thielen