Patents by Inventor Benoit Devaud-Pledran

Benoit Devaud-Pledran 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).

  • Vertical cavity laser of low resistivity
    Patent number: 5544193
    Abstract: A vertical emission laser structure comprising an active region between stacks of layers forming Bragg reflection mirrors respectively of the n-type and of the p-type, wherein: the stacks of layers are formed by different pairs of materials in the n-type mirror and in the p-type mirror; the pair of materials constituting the n-type mirror comprises materials having a conduction band gap that is narrow or even non-existent; and the pair of materials constituting the p-type mirror comprises materials having a valance band gap that is narrow, or even non-existent.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: August 6, 1996
    Assignee: France Telecom
    Inventors: Benoit Devaud-Pledran, Slimane Loualiche