Patents by Inventor Gerard Pitois

Gerard Pitois 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).

  • Wavelength-selective multiplexer-demultiplexer
    Patent number: 4622662
    Abstract: A multiplexer-demultiplexer for different wavelengths carried by optical fibers (10) the ends of which are disposed in the immediate vicinity of the focus of a concave mirror (18) associated with a plane diffraction grating (15) is disclosed.The multiplexer-demultiplexer consists of four elements that are adhesively attached to one another, namely, a fiber-carrying element (1); a grating-carrying element (15); an intermediary element (3) of the same index as the element (2); and a mirror element (4) having an index of refraction different from that of element (3) and selected to compensate for longitudinal spherical aberration of the mirror (18) for at least one of the wavelengths being utilized.
    Type: Grant
    Filed: April 2, 1984
    Date of Patent: November 11, 1986
    Assignee: Instruments S.A.
    Inventors: Jean-Pierre Laude, Jean Flamand, Gerard Pitois, Didier Lepere