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    METHOD OF PRODUCING OPTICAL FIBER INCLUDING ADJUSTMENT OF CORE DIAMETER PROFILE
    1.
    发明专利
    METHOD OF PRODUCING OPTICAL FIBER INCLUDING ADJUSTMENT OF CORE DIAMETER PROFILE 失效

    公开(公告)号：JP2002012437A

    公开(公告)日：2002-01-15

    申请号：JP2001138031

    申请日：2001-05-09

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FLEMING JAMES WILLIAM JR ,  ZYDZIK GEORGE JOHN

    IPC: C03B23/043 ,  C03B23/047 ,  C03B23/049 ,  C03B37/012 ,  C03B37/027

    Abstract: PROBLEM TO BE SOLVED: To provide a method of producing an optical fiber capable of adjusting core diameter profile for a specific fiber design in addition to providing a substantially uniform core diameter. SOLUTION: The method of producing an optical fiber comprises traversing of a heating means along the lengthwise direction of a silica based core rod to heat an area to be softened, and compressive or extensional movement is applied to the rod along the lengthwise direction of the rod during the traversing of the heating means which results in an increase or a decrease of the core diameter in the softened area. The desired core diameter profiles are achieved by providing a selective increase and/or decrease of core diameter over whole length of the core rod, such as a substantially uniform core diameter or a varying core diameter profile providing a specified characteristic such as regularly varying dispersion. Furthermore, larger size core rod can be produced through a controlled increase of core diameter including a fiber preform larger than the currently possible size.

    PRODUCTION OF ARTICLE
    2.
    发明专利
    PRODUCTION OF ARTICLE 失效

    公开(公告)号：JP2001019459A

    公开(公告)日：2001-01-23

    申请号：JP2000151545

    申请日：2000-05-23

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FLEMING JR JAMES WILLIAM ,  ZYDZIK GEORGE JOHN

    IPC: G02B6/00 ,  C03B23/207 ,  C03B37/012 ,  C03B37/027

    Abstract: PROBLEM TO BE SOLVED: To provide a more efficient production method by reducing the shutdown time and idle time of a process for producing an optical fiber and to provide a method for producing a refractory dielectric material such as an optical fiber made of silica. SOLUTION: A first slender refractory dielectric body having one end face and a second slender refractory dielectric body having one end face are prepared. These bodies are disposed so that the respective end faces are faced to each other and these end faces faced to each other are heated by an isothermal plasma torch to reduce the viscosity of the end faces, for example, to liquefy the end faces. At least one of the bodies is then moved until the end faces are joined to each other. The joined body is made into a preform for a silica-based optical fiber.

    Process for fabricating silica article involving joining of discrete bodies
    4.
    发明专利
    Process for fabricating silica article involving joining of discrete bodies 未知

    公开(公告)号：AU3536400A

    公开(公告)日：2000-11-30

    申请号：AU3536400

    申请日：2000-05-17

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FLEMING JAMES WILLIAM JR ,  ZYDZIK GEORGE JOHN

    IPC: G02B6/00 ,  C03B23/207 ,  C03B37/012 ,  C03B37/027 ,  C03B37/023

    Abstract: An improved process for fabricating a refractory dielectric article, in particular silica optical fiber, is provided. The fabrication process involves joining of two elongated bodies- typically silica preforms - end-to-end by use of an isothermal plasma torch technique and moving at least one of the bodies towards the other until their respective end faces are joined. When the process is applied to an optical fiber preform draw tower, continuous drawing is possible. A long preform made in this manner allows drawing of optical fiber with less down-time and waste than current processes. The plasma torch technique also produces low perturbations within the resultant preform, thereby increasing the amount of usable fiber.

    5.
    发明专利
    未知

    公开(公告)号：DE60010054D1

    公开(公告)日：2004-05-27

    申请号：DE60010054

    申请日：2000-11-20

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FLEMING JR ,  ZYDZIK GEORGE JOHN

    IPC: C03B23/043 ,  C03B23/047 ,  C03B23/049 ,  C03B37/012 ,  C03B37/027

    Abstract: A silica-based core rod is traversed by a heat source along its longitudinal axis, to provide heated, softened regions. During the traverse, compressive or tensile movements are provided along the rod's longitudinal axis, these movements inducing, respectively, increases or decreases in the core diameter at the softened regions. By providing selective core diameter increases and/or decreases across the entire length of the core rod, a desired core diameter profile is attained. It is possible to attain a substantially uniform core diameter, or a varying core diameter profile that provides particular properties, such as systematically varying dispersion. In addition, due to the ability to increase core diameter and core rod diameter in a controlled manner, it is possible to make larger core rods, and in turn larger fiber preforms, than presently possible. The so formed core rod is inserted into an overcladding tube and drawn to an optical fiber after collapse of the tube onto the core rod.

    PROCESS FOR FABRICATING OPTICAL FIBER INVOLVING TUNING OF CORE DIAMETER PROFILE
    6.
    发明专利
    PROCESS FOR FABRICATING OPTICAL FIBER INVOLVING TUNING OF CORE DIAMETER PROFILE 未知

    公开(公告)号：CA2340840A1

    公开(公告)日：2001-11-09

    申请号：CA2340840

    申请日：2001-03-14

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FLEMING JAMES WILLIAM JR ,  ZYDZIK GEORGE JOHN

    IPC: C03B23/043 ,  C03B23/047 ,  C03B23/049 ,  C03B37/012 ,  C03B37/027 ,  G02B6/00

    Abstract: A silica-based core rod is traversed by a heat source along its longitudinal axis, to provide heated, softened regions. During the traverse, compressive or tensile movements are provided along the rod's longitudinal axis, these movements inducing, respectively, increases or decreases in the core diameter at the softened regions. By providing selective core diameter increases and/or decreases across the entire length of the core rod, a desired core diameter profile is attained. It is possible to attain a substantially uniform core diameter, or a varying core diameter profile that provides particular properties, such as systematically varying dispersion. In addition, due to the ability to increase core diameter and core rod diameter in a controlled manner, it is possible to make larger core rods, and in turn larger fiber preforms, than presently possible.

    7.
    发明专利
    未知

    公开(公告)号：DE60000088D1

    公开(公告)日：2002-04-18

    申请号：DE60000088

    申请日：2000-05-15

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FLEMING JAMES WILLIAM ,  ZYDZIK GEORGE JOHN

    IPC: G02B6/00 ,  C03B23/207 ,  C03B37/012 ,  C03B37/027

    Abstract: An improved process for fabricating a refractory dielectric article, in particular silica optical fiber, is provided. The fabrication process involves joining of two elongated bodies- typically silica preforms - end-to-end by use of an isothermal plasma torch technique and moving at least one of the bodies towards the other until their respective end faces are joined. When the process is applied to an optical fiber preform draw tower, continuous drawing is possible. A long preform made in this manner allows drawing of optical fiber with less down-time and waste than current processes. The plasma torch technique also produces low perturbations within the resultant preform, thereby increasing the amount of usable fiber.

    8.
    发明专利
    未知

    公开(公告)号：DE60010054T2

    公开(公告)日：2004-10-14

    申请号：DE60010054

    申请日：2000-11-20

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FLEMING JR ,  ZYDZIK GEORGE JOHN

    IPC: C03B23/043 ,  C03B23/047 ,  C03B23/049 ,  C03B37/012 ,  C03B37/027

    Abstract: A silica-based core rod is traversed by a heat source along its longitudinal axis, to provide heated, softened regions. During the traverse, compressive or tensile movements are provided along the rod's longitudinal axis, these movements inducing, respectively, increases or decreases in the core diameter at the softened regions. By providing selective core diameter increases and/or decreases across the entire length of the core rod, a desired core diameter profile is attained. It is possible to attain a substantially uniform core diameter, or a varying core diameter profile that provides particular properties, such as systematically varying dispersion. In addition, due to the ability to increase core diameter and core rod diameter in a controlled manner, it is possible to make larger core rods, and in turn larger fiber preforms, than presently possible. The so formed core rod is inserted into an overcladding tube and drawn to an optical fiber after collapse of the tube onto the core rod.

    9.
    发明专利
    未知

    公开(公告)号：DE60000088T2

    公开(公告)日：2002-10-31

    申请号：DE60000088

    申请日：2000-05-15

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FLEMING JAMES WILLIAM ,  ZYDZIK GEORGE JOHN

    IPC: G02B6/00 ,  C03B23/207 ,  C03B37/012 ,  C03B37/027

    Abstract: An improved process for fabricating a refractory dielectric article, in particular silica optical fiber, is provided. The fabrication process involves joining of two elongated bodies- typically silica preforms - end-to-end by use of an isothermal plasma torch technique and moving at least one of the bodies towards the other until their respective end faces are joined. When the process is applied to an optical fiber preform draw tower, continuous drawing is possible. A long preform made in this manner allows drawing of optical fiber with less down-time and waste than current processes. The plasma torch technique also produces low perturbations within the resultant preform, thereby increasing the amount of usable fiber.

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