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    METHOD OF MANUFACTURING LONG AND NARROW GLASS PRODUCT
    1.
    发明专利
    METHOD OF MANUFACTURING LONG AND NARROW GLASS PRODUCT 失效

    公开(公告)号：JP2002047028A

    公开(公告)日：2002-02-12

    申请号：JP2001180816

    申请日：2001-05-14

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE EDWARD ,  BHAGAVATULA VENKATA ADISESHAIA ,  HAWK ROBERT M ,  TARCZA STEVEN H

    IPC: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  C03B37/02 ,  C03C15/00 ,  C03C25/68 ,  G02B6/024

    Abstract: PROBLEM TO BE SOLVED: To provide a method of manufacturing a long and narrow glass product effectively. SOLUTION: The narrow glass products is manufactured as follows: a tubular glass handle is provided with a mandrel on its end part, and an assembly of the mandrel and the glass tube is rotated and reciprocated in a flow of glass particle composed of SiO2 doped with at least 15 wt.% B2O3, while blowing the glass particle to the end part of the mandrel and the tube, and forming porous glass coating, then the mandrel is removed, the assembly of the handle and a tubular porous preform is formed. The tubular porous preform is heated and consolidated so as to form a close packed glass preform having an axial hole, and fused on the handle, while keeping temperature higher than 600 deg.C but lower than the temperature that effectively expands the preform, and making flow NF3 in the hole.

    4.
    发明专利
    未知

    公开(公告)号：DE69127680D1

    公开(公告)日：1997-10-23

    申请号：DE69127680

    申请日：1991-11-12

    Applicant: CORNING INC

    Inventor： BHAGAVATULA VENKATA ADISESHAIA

    IPC: G02B6/12 ,  G02B6/13

    Abstract: A method of manufacturing planar optical waveguides in which a planar optical preform which is stretched to form a planar optical cane with substantially smaller cross-sectional dimensions than the original preform, and in which the optical circuitry pattern is achieved by lithographic techniques. Optical fiber preforms may be inserted in slots in a substrate to form the planar optical preform.

    DISPERSION SHIFTED OPTICAL WAVEGUIDE
    5.
    发明专利
    DISPERSION SHIFTED OPTICAL WAVEGUIDE 未知

    公开(公告)号：CA2188088A1

    公开(公告)日：1997-05-22

    申请号：CA2188088

    申请日：1996-10-17

    Applicant: CORNING INC

    Inventor： BHAGAVATULA VENKATA ADISESHAIA

    IPC: G02B6/028 ,  C03B37/075 ,  G02B6/036 ,  G02B6/22 ,  G02B6/18

    Abstract: A novel optical waveguide fiber having low total dispersion slope. relatively large mode field diameter, larger effective area, and a relatively simple core profile design is disclosed. The core refractive index profile comprises three segments. The adjustability of the height, width and location of the three core index profile segments, provides sufficient flexibility to mee t a specification which calls for a dispersion shifted waveguide fiber capable of limiting four photon mixing or self phase modulation. The novel waveguide IS characterized by a mode field diameter ~ 7.5 microns and a total dispersion slope ~ 0.070 ps/nm2-km.

    Planar optical waveguides with planar optical elements
    10.
    发明专利
    Planar optical waveguides with planar optical elements 未知

    公开(公告)号：AU661890B2

    公开(公告)日：1995-08-10

    申请号：AU3304093

    申请日：1993-02-15

    Applicant: CORNING INC

    Inventor： BHAGAVATULA VENKATA ADISESHAIA

    IPC: G02B6/122 ,  G02B6/13 ,  G02B6/28 ,  G02B6/12

    Abstract: A planar optical waveguide comprises a substrate 1, a waveguide core layer 2, at least one planar optical element, wherein said planar optical element comprises at least one optically functional interface 3 which is adjacent to a cavity 4, and an overclad layer 5. The cavity enhances the optical characteristics of the planar optical element because of the substantial difference in the refractive index of the cavity as compared to the refractive index of said waveguide core layer.

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