Patents Represented by Attorney Loria Yeadon
  • Patent number: 5802232
    Abstract: A waveguide having alternating regions of different crystallographic orientations, thereby providing quasi-phase-matching for a non-linear frequency conversion, in which two wafers with epitaxial layers thereon are bonded together having different, preferably opposed, crystallographic orientations. One wafer is etched away, and a grating is etched such that one part of the grating has the orientation of one wafer and the other part has the orientation of the other wafer. Thereafter, a waveguide structure is epitaxially deposited upon the differentially oriented template so that the waveguide is differentially oriented in its axial direction. Thereby, quasi-phase-matching non-linear effects can be achieved.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: September 1, 1998
    Assignee: Bell Communications Research, Inc.
    Inventors: Rajaram Bhat, Catherine Genevieve Caneau, Mark A. Koza, Sung-Joo Yoo