Patents by Inventor Bertrand Loisel

Bertrand Loisel 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).

  • Mixed silica/polymer active directional coupler, in integrated optics
    Patent number: 5857039
    Abstract: This invention relates to a directional optical coupler including at least two optical guide cores (26, 28), in silica, lying on a cladding (24) in a mineral dielectric material, and a covering layer (30) in a polymer material, which covers the two optical guide cores, and whose index is less than that of the optical guide cores.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: January 5, 1999
    Assignee: France Telecom
    Inventors: Dominique Bosc, Nicole Devoldere, Bertrand Loisel