Patents by Inventor Van-Tran Nguyen

Van-Tran Nguyen 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: 4128772
    Abstract: A tunable far infrared generator makes use of a four-photon mixing process that cycles among highly excited atomic states, the lowest of which states is reached from the atomic ground state by a visible or ultraviolet photon, and the remainder of which states are connected by transitions in the infrared.
    Type: Grant
    Filed: December 29, 1977
    Date of Patent: December 5, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Tao-Yuan Chang, Theodoor C. Damen, Van-Tran Nguyen
  • Patent number: 4095122
    Abstract: The invention relates to a high-power tunable infrared source employing a four-photon mixing process, with three input lasers, in which process the output power is resonantly enhanced by exciton states in the conversion medium.
    Type: Grant
    Filed: August 4, 1977
    Date of Patent: June 13, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Theodoar Charlouis Damen, Erich Gornik, Van-Tran Nguyen, Chandra Kumar Naranbhai Patel
  • Patent number: 4093344
    Abstract: An optical polarization rotator is developed for use with infrared radiation using a nonlinear, two-photon interaction in a solid medium. The mechanism employed is resonance dispersion, where the sum frequency of an infrared beam to be rotated and a visible control beam is close to the frequency of a two-photon transition of exciton states, thereby producing different amounts of dispersion for the two orthogonal components of the linearly polarized infrared beam. The result of a phase difference between the two components is a rotation of the plane of polarization of the infrared beam.
    Type: Grant
    Filed: November 5, 1976
    Date of Patent: June 6, 1978
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Theodoor Charlouis Damen, Erich Gornik, Van-Tran Nguyen, Chandra Kumar Naranbhai Patel