Patents by Inventor Joseph Ichkhan

Joseph Ichkhan 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: 8467426
    Abstract: A system and method for cooling an optical fiber includes a flexible heat sink member, a heat pipe evaporator, and a thermal storage medium. The flexible heat sink member is in thermal contact with the optical fiber. The heat pipe evaporator is configured to dissipate heat from the optical fiber. The thermal storage medium is in thermal contact with the flexible heat sink member and the heat pipe evaporator. The flexible heat sink member is configured to compensate for any mismatch in coefficient of thermal expansion between material of the optical fiber and material of the flexible heat sink member so as to provide radial compliance and to maintain direct thermal contact between the optical fiber and the flexible heat sink member.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: June 18, 2013
    Assignee: Raytheon Company
    Inventors: Joseph Ichkhan, John Schroeder, David A. Rockwell
  • Publication number: 20070160094
    Abstract: A thermal nonlinear cell and method. The cell includes a substantially planar nonlinear medium and a mechanism for removing thermal energy from the medium in a direction substantially orthogonal to said medium. In one embodiment, the mechanism for removing thermal energy is a thermally conductive window mounted adjacent to the medium. Preferably, the mechanism includes plural thermally conductive windows between which the nonlinear medium is disposed. In the best mode, the windows are sapphire and the nonlinear medium is a fluid. The windows and the medium are transmissive with respect to first and second beams that interfere with each other and create an interference pattern in the cell. The interference pattern is sampled by a sampling hologram created within the multiple layers of the medium. The interference pattern is used via a sampling hologram to create a phase conjugate of a signal beam. The windows move thermal energy from the medium in a direction transverse to the longitudinal axis of the medium.
    Type: Application
    Filed: January 30, 2007
    Publication date: July 12, 2007
    Inventors: Alexander Betin, N. Davis, Joseph Ichkhan
  • Publication number: 20050275935
    Abstract: A thermal nonlinear cell and method. The cell includes a substantially planar nonlinear medium and a mechanism for removing thermal energy from the medium in a direction substantially orthogonal to said medium. In one embodiment, the mechanism for removing thermal energy is a thermally conductive window mounted adjacent to the medium. Preferably, the mechanism includes plural thermally conductive windows between which the nonlinear medium is disposed. In the best mode, the windows are sapphire and the nonlinear medium is a fluid. The windows and the medium are transmissive with respect to first and second beams that interfere with each other and create an interference pattern in the cell. The interference pattern is sampled by a sampling hologram created within the multiple layers of the medium. The interference pattern is used via a sampling hologram to create a phase conjugate of a signal beam. The windows move thermal energy from the medium in a direction transverse to the longitudinal axis of the medium.
    Type: Application
    Filed: June 10, 2004
    Publication date: December 15, 2005
    Inventors: Alexander Betin, N. Davis, Joseph Ichkhan