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    Dispersion managed optical fiber and preform and process of making the preform
    81.
    发明专利
    Dispersion managed optical fiber and preform and process of making the preform 未知

    公开(公告)号：AU2247801A

    公开(公告)日：2001-06-18

    申请号：AU2247801

    申请日：2000-10-18

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E

    IPC: C03B37/012 ,  G02B6/036 ,  G02B6/16

    Abstract: The invention disclosed is an optical fiber which includes a central core glass region with a first refractive index profile. The fiber includes a second core glass region adjacent to and surrounding said central region, said second region having a thickness that varies along an axial direction of said second region and having a second refractive index profile that differs from said first profile. Additionally, the invention includes an optical fiber preform that can be drawn into the above fiber. The invention also includes the method of making the above describe optical fiber. Furthermore, the invention may also be practiced to make an optical fiber preform in accordance with the aforementioned invention. The aforementioned fiber and preform is particularly useful as a dispersion managed fiber or dispersion managed preform respectively.

    BROADBAND PULSE-RESHAPING OPTICAL FIBER
    84.
    发明专利
    BROADBAND PULSE-RESHAPING OPTICAL FIBER 未知

    公开(公告)号：CA2352051A1

    公开(公告)日：2000-06-08

    申请号：CA2352051

    申请日：1999-11-10

    Applicant: CORNING INC

    Inventor： EVANS ALAN F ,  BERKEY GEORGE E ,  SRIKANT V

    IPC: G02B6/02 ,  G02B6/036 ,  G02B6/34 ,  G02B6/16 ,  H04B10/12

    Abstract: A pulse-reshaping optical fiber having a core with refractive index nc surrounded by a cladding layer, the diameter of the core changing monotonically along the length of the fiber. The core includes a central region having a maximum refractive index n1 and a moat region disposed radially adjacent to the central region. The moat region has a minimum refractive index n2 which is sufficiently low that the index delta .DELTA.2 of the moat region with respect to nc is not greater than 0.1 %. The moat regio n affects the change in dispersion with respect to fiber cladding diameter, as well as providing the pulse-reshaping fiber with low dispersion versus wavelength slope. The pulse-reshaping fiber is particularly useful in association with optical transmission systems where high transmission rates and narrow pulse widths are desired, including components such as high pulse rate wavelentgh-division-multiplexers (WDMs) and optical regenerators.

    85.
    发明专利
    未知

    公开(公告)号：ID23529A

    公开(公告)日：2000-04-27

    申请号：ID982002

    申请日：1998-07-23

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E

    IPC: G02B6/036 ,  G02B6/02 ,  G02B6/22 ,  G02B6/16

    Abstract: Disclosed is a single mode optical waveguide fiber designated for compensating for positive dispersion in optical telecommunications systems. A key characteristic of the invention is that the novel dispersion compensating waveguide, viz., a waveguide having large negative dispersion, contains no dopants, such as fluorine, which lower the refractive index of silica. A refractive index profile design which includes a high refractive index center segment (5) surrounded by a plurality of alternating high (6, 10, 13) and low refractive index segments, provides a dispersion compensation fiber which has the optical properties required for the system to be compensated without sacrificing bend resistance, increasing splicing loss, or elevating polarization mode dispersion.

    METHOD OF MAKING OPTICAL FIBERS
    88.
    发明专利
    METHOD OF MAKING OPTICAL FIBERS 未知

    公开(公告)号：CA2326682A1

    公开(公告)日：1999-10-28

    申请号：CA2326682

    申请日：1999-04-09

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E

    IPC: G02B6/00 ,  C03B37/025 ,  C03B37/027 ,  G02B6/02 ,  C03B37/02

    Abstract: An optical fiber and method of making, wherein the optical fiber alternates between regions having different diameters along its length, wherein the refractive index of said blank and the diameters of said fiber are chosen to result in a fiber having alternating regions of positive and negative dispersion at a wavelength which is greater than 1480 nm, yet preferably has a low net dispersion and dispersion slope. A preferred such profile consists of a core region surrounded by a cladding region, said core region comprised of a central core region which is updoped with respect to said cladding region, said central core region surrounded by a moat region which is downdoped with respect to said cladding region, and said moat region is surrounded by an annular ring region which is updoped with respect to said cladding region.

    Waveguide profile for large effective area
    89.
    发明专利
    Waveguide profile for large effective area 未知

    公开(公告)号：AU9793898A

    公开(公告)日：1999-05-17

    申请号：AU9793898

    申请日：1998-10-06

    Applicant: CORNING INC ,  LIU YANMING

    Inventor： LIU YANMING ,  BERKEY GEORGE E

    IPC: G02B6/02 ,  G02B6/036 ,  G02B6/16 ,  G02B6/22

    Abstract: Disclosed is a single mode optical waveguide fiber having a segmented core design. The core may have two or more segments. The highest refractive index portion of the core is spaced apart from the centerline of the waveguide fiber. The relative index of the first or center segment of the core is negative, where the reference refractive index is taken to be the minimum index clad. This family of core profiles provides effective areas in the range of 110 mum2 to 150 mum2 in the operating window around 1550 nm.

    90.
    发明专利
    未知

    公开(公告)号：ID21136A

    公开(公告)日：1999-04-29

    申请号：ID981384

    申请日：1998-10-20

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E

    IPC: G02B6/036 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  G02F1/00

    Abstract: A method of making a segmented core optical waveguide preform for making fiber that is resistant to attenuation increases due to hydrogen and heat aging. A first core region comprising a silica glass rod containing at least a first dopant such as fluorine is inserted into a central opening of a second core region comprising silica soot containing a second dopant such as germanium. The first core region and second core region are consolidated together to form a segmented core region and cladding is deposited on the outer surface of the segmented core region. The second core region having the central opening is made by depositing silica soot containing the second dopant and removing the mandrel.

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