Patents Assigned to De Staat der Nederlanden, Te Dezen Vertegenwoordigd Door de Directeur-Generaal der Posterijen, Telegraphie en Telefonie
  • Device for coupling at least three light guides
    Patent number: 4257673
    Abstract: The invention provides a coupling device for monochromatic optical signals based on the amplitude division method. The optical signal emerging from one light guide is divided by means of one or more diffraction gratings among three or more outgoing light guides. Inversely, the optical signals from a number of light guides can be combined into one optical signal. Such a coupling device has a high optical efficiency, is mode-independent and produces small differences in light intensity between the branch signals.
    Type: Grant
    Filed: December 18, 1978
    Date of Patent: March 24, 1981
    Assignee: De Staat der Nederlanden, Te Dezen Vertegenwoordigd Door de Directeur-Generaal der Posterijen, Telegraphie en Telefonie
    Inventor: Pieter Matthijsse