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    METHOD OF MAKING FUSED SILICA
    11.
    发明专利
    METHOD OF MAKING FUSED SILICA 未知

    公开(公告)号：CA2062882A1

    公开(公告)日：1993-02-27

    申请号：CA2062882

    申请日：1992-03-12

    Applicant: CORNING INC

    Inventor： BLACKWELL JEFFERY L ,  DOBBINS MICHAEL S ,  MCLAY ROBERT E ,  TRUESDALE CARLTON M

    IPC: C03B37/018 ,  C03B8/04 ,  C03B19/14 ,  C03B20/00 ,  C03B37/014 ,  C03C3/06 ,  C07F7/08 ,  C07F7/10 ,  G02B6/00 ,  C03C17/30 ,  C09D1/00 ,  C03C13/04 ,  G02B6/10 ,  C03C17/245

    Abstract: This invention relates to the production of high purity fused silica glass through oxidation and/or flame hydrolysis of a halide-free, organosilicon-R compound in vapor form having the following properties: (a) producing a gas stream of a halide-free siliconcontaining compound in vapor form capable of being converted through thermal decomposition with oxidation or flame hydrolysis to SiO2; (b) passing said gas stream into the flame of a combustion burner to form amorphous particles of fused SiO2; (c) depositing said amorphous particles onto a support; and (d) either essentially simultaneously with said deposition or subsequently thereto consolidating said deposit of amorphous particles into a virtually nonporous body; the improvement comprising utilizing a halide-free, organosilicon-R compound in vapor form having the following properties: (1) a Si-R bond dissociation energy that is no higher than the dissociation energy of the Si-O bond; (2) a boiling point no higher than 350.degree.C; and (3) which, upon pyrolysis and/or hydrolysis, will produce decomposition products beside SiO2 which are deemed to be environmentally safe or the emissions are below acceptable governmental standards.

    METHOD FOR MAKING OPTICAL FIBERS HAVING CORES WITH NON-CIRCULAR CROSS-SECTIONS
    16.
    发明专利
    METHOD FOR MAKING OPTICAL FIBERS HAVING CORES WITH NON-CIRCULAR CROSS-SECTIONS 未知

    公开(公告)号：CA2382243A1

    公开(公告)日：2001-03-01

    申请号：CA2382243

    申请日：2000-07-11

    Applicant: CORNING INC

    Inventor： TRUESDALE CARLTON M ,  ZENTENO LUIS A ,  BURKE GERALD E

    IPC: G02B6/00 ,  C03B37/012

    Abstract: An optical fiber with a core of non-circular cross-section is realized by a method including the steps of creating a void having the desired cross-secti on in a preform housing and filling the void with an optical material. This structure is then collapsed to solidify it and drawn to desired dimensions. The optical material may be rods, soot or ground material. An active region which may be provided in the core does not necessarily have a different refractive index than that of immediately adjacent material. The active regi on of the drawn fiber may only support oscillation in the fundamental transvers e mode. The fiber drawn by the method disclosed may be used to convert multi- mode pump light into single mode light, e.g., for pumping a single mode amplifier.

    18.
    发明专利
    未知

    公开(公告)号：ID24599A

    公开(公告)日：2000-07-27

    申请号：ID20000292

    申请日：1998-07-07

    Applicant: CORNING INC

    Inventor： EVANS ALAN F ,  TRUESDALE CARLTON M

    IPC: C03B37/027 ,  C03C13/04 ,  G02B6/036 ,  G02B6/22

    Abstract: Suppression of stimulated Brillouin scattering (SBS) by broadening the energy spectrum of participating SBS photons and/or phonons is achieved in an optical fiber having a core with both radially nonuniform viscosity and CTE profiles provided by alternating layers of glass modifying dopants such as phosphorous and fluorine. The nonuniform thermal expansion and viscosity profiles impart a residual, permanent, nonuniform stress in the fiber. The SBS suppressing effect provided by the nonuniform stress can be controlled and enhanced by applying a uniform or nonuniform tensile force to the fiber as it is being drawn. A preform for the fiber is also disclosed.

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