Patents Assigned to University of Gent
  • Optical decision circuit and use thereof
    Patent number: 6366382
    Abstract: An optical decision circuit, based on gain clamped semiconductor optical amplifiers, is disclosed. This optical decision circuit can be used for 2R signal regeneration in optical communication systems. By adding a clock signal to the input of said optical decision circuit, said circuit is also suited for 3R regeneration. Such a circuit can easily be implemented as an integrated circuit or an OEIC.
    Type: Grant
    Filed: August 27, 1998
    Date of Patent: April 2, 2002
    Assignees: IMEC, University of Gent
    Inventors: Geert Morthier, Roel Baets
  • Optical system with a dielectric subwavelength structure having high reflectivity and polarization selectivity
    Patent number: 6191890
    Abstract: The present invention is related to a system for transferring a beam of electromagnetic radiation having a vacuum wavelength. The system according to the invention includes a first dielectric medium, a second dielectric medium and a dielectric layer in between the first and the second medium. The dielectric layer has a periodicity of the dielectric properties parallel to the layer. The periodicity has a period that is smaller than the wavelength of the electromagnetic radiation in the second dielectric medium.
    Type: Grant
    Filed: March 31, 1997
    Date of Patent: February 20, 2001
    Assignees: Interuniversitair Micro-Elektronica Centrum vzw, University of Gent
    Inventors: Roel Baets, Bart Demeulenaere, Bart Dhoedt, Stefan Goeman
  • Polymer microspheres and a method of production thereof
    Patent number: 5922357
    Abstract: The invention relates to microspheres which are suitable for biomedical uses which have a diameter in the range of 10 nm to 2 mm and which comprise a substantially spherical core particle of a non-water-soluble polymer and an outer surface layer consisting substantially of a water-soluble polymer. The water-soluble polymer is conjugated to polyethylene glycol and the non-water-soluble core particle is attached to the water-soluble polymer by the polyethylene glycol moiety. The microspheres are prepared by dissolving the non-water-soluble polymer in a suitable first solvent, dispersing the polymer solution in a solution of the PEG/water-soluble polymer conjugate and evaporating the first solvent to form microspheres in which the PEG anchors the water-soluble polymer to the core particle.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: July 13, 1999
    Assignees: University of Nottingham, University of Gent
    Inventors: Allan Gerald Arthur Coombes, Stanley Stewart Davis, Etienne Honore Schacht