Patents by Inventor Ilan Samid

Ilan Samid 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).

  • Patent number: 4065729
    Abstract: A monolithic PNPN injection laser diode operating as an optical repeater is comprised of a direct band-gap semiconductor material, such as essentially GaAs, epitaxially grown in five layers with the first, third and fifth layers of GaAsAl and the second and fourth layers of GaAs, and all layers suitably doped to effectively form two complementary transistors interconnected for regenerative feedback between them with the second layer forming the base of one transistor and the collector of the other transistor, and the third layer forming the base of the other transistor and the collector of the one transistor. The PNPN laser diode thus produced has a V-I negative resistance characteristic. The second and fourth layers produce coherent laser beams in response to a light pulse received while the laser diode is biased off with its load line below its breakover voltage, thus switching the laser diode on.
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: December 27, 1977
    Assignee: California Institute of Technology
    Inventors: Avraham Gover, Ilan Samid, Chien-Ping Lee