Patents by Inventor Steven Terrence Davey

Steven Terrence Davey 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).

  • Patent number: 6223562
    Abstract: The surface quality of halide, preferably fluoride, articles, e.g., articles used in the preparation of halide fibers is improved by cleaning the surface with an aqueous etchant and thereafter removing the etchant by washing the surface with methanol. The aqueous etchant is preferably a solution which contains hydrochloric acid and zirconium oxychloride.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: May 1, 2001
    Assignee: British Telecommunications Public Limited Company
    Inventors: Daryl Szebesta, John Richard Williams, Steven Terrence Davey
  • Patent number: 5867515
    Abstract: This invention relates to halide glasses which have particular utility as hosts for rare earth elements in order to provide optical amplification by laser activity. The glasses are characterized in that the metal content is similar to conventional ZBLAN glasses except that it has been discovered that the replacement of Al by Y and In and the use of more than one alkali metal fluoride, e.g., NaF, CsF and LiF, has synergistic benefits. The synergistic benefits are good lasing performance (due to the low content of aluminum) and good stability in spite of the low content of aluminum. Pr.sup.3+ constitutes a good lasing species for amplifying telecommunications signals at 1300 nm using pump radiation at 1020 nm.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: February 2, 1999
    Assignee: British Telecommunications public limited company
    Inventors: Wayne George Jordan, Animesh Jha, Steven Terrence Davey