Patents by Inventor Alan D. Heaney

Alan D. Heaney 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).

  • Method and apparatus for homogeneous heating in an optical waveguiding structure
    Publication number: 20040071386
    Abstract: This invention pertains to a novel design for an integrated optical communications device utilizing the thermo-optic effect to condition, manipulate, or alter an optical signal transmitted thereto.
    Type: Application
    Filed: April 9, 2003
    Publication date: April 15, 2004
    Inventors: Joris van Nunen, Alan D. Heaney, Chuck C. Xu, Deepti Pant, Louay Eldada
  • Amplitude mask for writing long-period gratings
    Patent number: 6447959
    Abstract: Long-period gratings are written more quickly and at higher intensities by amplitude masks having shadow-forming patterns that scatter, redirect, or otherwise divert shadow portions of radiation used for writing the gratings instead of blocking the shadow portions by absorption or reflection. The shadow-forming masks can be formed along transparent base optics by arrays of diffusers, diffractors, or refractors that relatively divert different portions of the radiation.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: September 10, 2002
    Assignee: University of Rochester
    Inventors: Turan Erdogan, Alan D. Heaney, David B. Stegall