Patents Assigned to AT&T Bell Laboratories American Telephone and Telegraph Company
  • Optical fiber bidirectional transmission system
    Patent number: 4879763
    Abstract: A bidirectional optical communications system is described using a multiple quantum well structure as both a photodetector and light modulator.
    Type: Grant
    Filed: February 21, 1986
    Date of Patent: November 7, 1989
    Assignee: AT&T Bell laboratories American Telephone and Telegraph Company
    Inventor: Thomas H. Wood
  • Nonlinear optical materials and devices
    Patent number: 4859876
    Abstract: An electrooptic or optical parametric device comprises a noncrystalline second order optically nonlinear element and means for providing an optical input to and an optical output from said element wherein said element comprises an organic molecule having second order optical susceptibility incorporated in a directionally oriented manner in an optically clear glassy polymer. When said device is employed in an electrooptic mode it includes means for applying an electric field and/or optical input to said element for altering an optical property thereof.
    Type: Grant
    Filed: June 19, 1987
    Date of Patent: August 22, 1989
    Assignees: AT&T Bell Laboratories American Telephone and Telegraph Company, AT&T Technologies, Inc.
    Inventors: Carl W. Dirk, Howard E. Katz, Salvatore J. Lalama, Kenneth D. Singer, John E. Sohn