Patents by Inventor Mahmoud A. El-Sherif

Mahmoud A. El-Sherif 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).

  • Process for producing a grating on an optical fiber
    Patent number: 4842405
    Abstract: A method for imparting a diffraction grating into the cladding layer and core layer of small diameter optical fibers consisting of (a) etching a section of an optical fiber to reduce the thickness of the cladding layer of the optical fiber, (b) coating the etched portion of the fiber with a photoresist, exposing the photoresist to produce the diffraction grating pattern using on-axis interferometry using a laser source (d) dissolving the non-exposed photoresist and (e) etching the diffraction grating pattern into the cladding layer and/or core of the optical fiber.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: June 27, 1989
    Inventor: Mahmoud El-Sherif