Patents by Inventor Mark A. Cappuzzo

Mark A. Cappuzzo 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).

  • Optical waveguide structure including reflective asymmetric cavity
    Patent number: 5182787
    Abstract: A turning mirror in an optical waveguide structure is made by etching in the upper surface of the structure a cavity (18) that intercepts the path of light propagated by the waveguide (15, 16, 13). Preferably, the cavity is made to be asymmetric with the side (25) of the cavity remote from the waveguide sloping at typically a forty-five degree angle. The asymmetry can be introduced by using mask and etch techniques and treating the surface of the structure such that the etchant undercuts the mask on the side of the cavity remote from the waveguide to a greater extent than it undercuts the mask on the side of the cavity adjacent the waveguide.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: January 26, 1993
    Assignee: AT&T Bell Laboratories
    Inventors: Greg E. Blonder, Mark A. Cappuzzo, Harold R. Clark, Ronald E. Scotti, Yiu-Huen Wong
  • Methods for making mirrors
    Patent number: 5135605
    Abstract: A turning mirror in an optical waveguide structure is made by etching in the upper surface of the structure a cavity (18) that intercepts the path of light propagated by the waveguide (15, 16, 13). Preferably, the cavity is made to be asymmetric with the side (25) of the cavity remote from the waveguide sloping at typically a forty-five degree angle. The asymmetry can be introduced by using mask and etch techniques and treating the surface of the structure such that the etchant undercuts the mask on the side of the cavity remote from the waveguide to a greater extent than it undercuts the mask on the side of the cavity adjacent the waveguide.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: August 4, 1992
    Assignee: AT&T Bell Laboratories
    Inventors: Greg E. Blonder, Mark A. Cappuzzo, Harold R. Clark, Ronald E. Scotti, Yiu-Huen Wong