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    111.
    发明专利
    未知

    公开(公告)号：ID22225A

    公开(公告)日：1999-09-16

    申请号：ID990942

    申请日：1998-01-29

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E

    IPC: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  G02B6/036 ,  C03B37/027

    Abstract: Disclosed is a method of making an optical fiber preform having at least one annular region of depressed refractive index. A tube of silica doped with fluorine and/or boron is overclad with silica soot. A core rod is inserted into the overclad tube and the resultant assembly is heated while chlorine flows between the tube and the core rod to clean the adjacent surfaces. When the soot sinters, the tube collapses onto and fuses to the rod. The resultant tubular structure is formed into an optical fiber which exhibits low attenuation as a result of the low seed count at the interface between the inner core and the region that is doped with fluorine and/or boron.

    METHOD OF MAKING SEGMENTED CORE OPTICAL WAVEGUIDE PREFORMS
    112.
    发明专利
    METHOD OF MAKING SEGMENTED CORE OPTICAL WAVEGUIDE PREFORMS 未知

    公开(公告)号：CA2247970A1

    公开(公告)日：1999-04-29

    申请号：CA2247970

    申请日：1998-09-23

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E

    IPC: G02B6/036 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  G02B6/16 ,  G02B6/18

    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 is inserted into a central opening of a second core region comprising silica soot containing a second dopant. 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.

    METHOD OF MAKING OPTICAL FIBERS
    117.
    发明专利
    METHOD OF MAKING OPTICAL FIBERS 未知

    公开(公告)号：CA2220416A1

    公开(公告)日：1997-11-06

    申请号：CA2220416

    申请日：1997-04-21

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E

    IPC: G02B6/028 ,  C03B37/012 ,  C03B37/018 ,  C03B37/027 ,  G02B6/18

    Abstract: An optical fiber having optical characteristics that systematically vary along its length is made by inserting a plurality of cylindrical tablets into a cladding glass tube and overcladding the tube with particles of cladding glass. Each tablet contains a core region, and it optionally contains a layer of cladding glass Adjacent tablets are capable of forming optical fiber sections having different optical properties. Prior to consolidating the glass particles, chlorine flows through the tube and over the tablets. When the tube begins to sinter, the chlorine flow is stopped and the sintering particles generate an inwardly directed force that causes the tube to collapse inwardly onto the tablets which concurrently become fused to each other. The resultant draw blank can be drawn into a low loss optical fiber. This method is particularly useful for making dispersion managed single-mode optical fibers.

    METHOD OF MAKING OPTICAL FIBER HAVING DEPRESSED INDEX CORE REGION
    118.
    发明专利
    METHOD OF MAKING OPTICAL FIBER HAVING DEPRESSED INDEX CORE REGION 未知

    公开(公告)号：CA2161939A1

    公开(公告)日：1996-06-21

    申请号：CA2161939

    申请日：1995-11-01

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E

    IPC: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  G02B6/036 ,  G02B6/18

    Abstract: Disclosed is a method of making an optical fiber preform having at least one annular region of depressed refractive index. A tube of silica doped with fluorine and/or boron is overclad with silica soot. A core rod is inserted into the overclad tube and the resultant assembly is heated while chlorine flows between the tube and the core rod to clean the adjacent surfaces. When the soot consolidates, the tube collapses onto and fuses to the rod. The resultant tubular structure is provided with cladding and drawn to form an optical fiber which exhibits low attenuation as a result of the low seed count at the interface between the inner core and the region that is doped with florine and/or boron.

    ENVIRONMENTALLY ROBUST FIBER OPTIC COUPLER AND METHOD
    120.
    发明专利
    ENVIRONMENTALLY ROBUST FIBER OPTIC COUPLER AND METHOD 未知

    公开(公告)号：CA2093100A1

    公开(公告)日：1994-01-17

    申请号：CA2093100

    申请日：1993-03-31

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E ,  MILLER WILLIAM J

    IPC: G02B6/28 ,  G02B6/26

    Abstract: A fiber optic coupler is formed by inserting a plurality of optical fibers into the longitudinal bore of a glass tube so that at least a portion of each fiber extends from at least one end of the tube. The midregion of the tube is collapsed onto the fibers, uncollapsed bore portions remaining at the tube end regions. Each bore portion is connected to the tube end surface by a funnel that facilitates the fiber insertion step. The central portion of the midregion is stretched to reduce the diameter thereof. In a first embodiment, glue is applied to the funnel. Before the glue is cured, a sufficient period of time is allowed to elapse to permit said glue to flow by capillary action between the fibers and the adjacent portion of the wall of the bore portion. The glue flows at least 3 mm into the bore portion beyond the bottom of the funnel. The glue that flows by capillary action fails to completely surround the fibers with glue. The glue is then cured. In a second embodiment, a hollow filament is inserted into the uncollapsed bore portion and a vacuum is applied to the filament. Glue, which is applied to the funnel, is drawn into the uncollapsed bore portion due to the evacuated condition thereof, thus filling the uncollapsed bore portion to the desired level.

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