Patents by Inventor Tracey L. Margraf

Tracey L. Margraf 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).

  • Photorefractive effect in bulk chalcogenide glass and devices made therefrom
    Patent number: 5136677
    Abstract: The photorefractive effect results in a change in the refractive index of bulk chalcogenide glass when it is exposed to certain wavelengths of light, in particular, sub-band-gap light. The effect results in a variety of device structures including a fiber optic faceplate; an optical waveguide; a fiber tap; a lens and a Bragg grating. Methods for fabricating the various devices are described.
    Type: Grant
    Filed: June 6, 1991
    Date of Patent: August 4, 1992
    Assignee: Galileo Electro-Optics Corporation
    Inventors: Martin G. Drexhage, Lee M. Cook, Tracey L. Margraf, Cornelius T. Moynihan
  • Photorefractive effect in bulk glass and devices made therefrom
    Patent number: 5028105
    Abstract: The photorefractive effect results in a change in the refractive index of bulk chalcogenide glass when it is exposed to certain wavelengths of light, in particular, sub-band-gap light. The effect results in a variety of device structures including a fiber optic faceplate; an optical waveguide; a fiber tap; a lens and a Bragg grating. Methods for fabricating the various devices are described.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: July 2, 1991
    Assignee: Galileo Electro-Optics Corporation
    Inventors: Martin G. Drexhage, Lee M. Cook, Tracey L. Margraf, Cornelius T. Moynihan