Patents by Inventor Andre Tromeur

Andre Tromeur 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).

  • Process for the transposition of an optical modulation of one wavelength to another adjustable wavelength
    Patent number: 5539760
    Abstract: A process for the transposition of a modulation of an adjustable wavelength. A semiconductor amplifier is relooped through a feedback loop including a filter set to a first wavelength. An incident beam set at a second wavelength which is amplitude modulated is injected into the semiconductor amplifier laser. The incident beam is either extinguished or allows self-oscillation to be established in the loop. Thus, the modulation is transposed from the second wavelength to the first wavelength.
    Type: Grant
    Filed: September 2, 1994
    Date of Patent: July 23, 1996
    Assignee: France Telecom Etablissement autonome de droit public
    Inventors: Herve Dupont, Rene Auffret, Andre Tromeur
  • Truncated frequency discriminator
    Patent number: 5272559
    Abstract: A truncated frequency discriminator according to the present invention features an amplifier (A), phase adjustment circuits (CAP1, CAP2) and circuitry (V1, V2) for very weakly forward polarizing Schottky diodes (DS1, DS2). Such a truncated frequency discriminator allows for a reduced noise and may find particular application in optical telecommunications receivers.
    Type: Grant
    Filed: August 21, 1992
    Date of Patent: December 21, 1993
    Assignee: France Telecom Etablissement Autonome de Droit Public
    Inventors: Daniel Hui Bon Hoa, Michel Condom, Andre Tromeur