Patents by Inventor Bill C. McCollum

Bill C. McCollum 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 for fabricating optical fibers having cores with high rare earth content
    Patent number: 4826288
    Abstract: A chemical vapor deposition method which utilizes a rare earth chelate vapor as a source of rare earth ions for producing an optical fiber having a core with a high rare earth content.
    Type: Grant
    Filed: April 9, 1987
    Date of Patent: May 2, 1989
    Assignee: Polaroid Corporation, Patent Department
    Inventors: Robert J. Mansfield, Bill C. McCollum, Richard P. Tumminelli
  • Chromium (3+) doped germanate garnets as active media for tunable solid state lasers
    Patent number: 4648094
    Abstract: A laser medium containing a chromium (3+) doped germanate garnet represented by the general formula: Ca.sub.3 M.sub.2(1-x) Cr.sub.2x (GeO.sub.4).sub.3 wherein M is Al.sup.3+, Ga.sup.3+, Sc.sup.3+, Lu.sup.3+, or Y.sup.3+ and 0<x.ltoreq.0.25 is disclosed. A laser employing the above-described laser medium is also described.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: March 3, 1987
    Assignee: GTE Laboratories Incorporated
    Inventors: Bill C. McCollum, Peter T. Kenyon, Leonard J. Andrews
  • Chromium (III) ordered perovskite lasers and media therefor
    Patent number: 4377864
    Abstract: A laser medium includes an ordered perovskite crystal of the general formula: A.sub.2 B Cr.sub.y B'.sub.1-y X.sub.6. A and B are alkali metal ions with the ionic radius of A greater than B. B' is an ion selected from the group consisting of Y.sup.3+, La.sup.3+, Gd.sup.3+, Lu.sup.3+, Sc.sup.3+, Al.sup.3+, Ga.sup.3+, and In.sup.3+. X is an ion selected from the group consisting of F.sup.-, Cl.sup.-, and Br.sup.-. A can be an ion selected from the group consisting of K.sup.+, Na.sup.+,Cs.sup.+, and Rb.sup.+. B can be an ion selected from the group consisting of K.sup.+-, Na.sup.+, and Li.sup.+. The chromium can be represented by Cr.sup.+3 ions. The laser media can be ordered perovskite polycrystalline compounds of the formulae: CsNaCr.sub.0.01 Y.sub.0.99 Cl.sub.6 ; KLi Cr.sub.y Sc.sub.1-y F.sub.6 (where y equals 0.01 and 0.10); K.sub.2 NaCr.sub.y Sc.sub.1-y F.sub.6 (where 0.01 .ltoreq.y.ltoreq.0.40).
    Type: Grant
    Filed: August 10, 1981
    Date of Patent: March 22, 1983
    Assignee: GTE Laboratories Incorporated
    Inventors: Bill C. McCollum, Leonard J. Andrews, Alexander Lempicki
  • Stoichiometric rare earth laser material and laser based thereon
    Patent number: 4229713
    Abstract: A high gain stoichiometric neodymium laser medium of the general formula K.sub.5 Nd.sub.x M.sub.(1-x) Li.sub.2 F.sub.10 where x takes on a non-zero positive value less than or equal to one, and M is a metal selected from the group consisting of lanthanum, cerium, and gadolinium.Minilasers employing a laser medium of the general formula K.sub.5 Nd.sub.x M.sub.(1-x) Li.sub.2 F.sub.10 are provided in which the optical pumping is provided by at least one light emitting diode or laser diode.
    Type: Grant
    Filed: December 14, 1978
    Date of Patent: October 21, 1980
    Assignee: GTE Laboratories Incorporated
    Inventors: Bill C. McCollum, Alexander Lempicki