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    PR0DUCTION OF SOL
    1.
    发明专利
    PR0DUCTION OF SOL 失效

    公开(公告)号：JPH10114511A

    公开(公告)日：1998-05-06

    申请号：JP12199897

    申请日：1997-05-13

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： BHANDARKAR SUHAS DATTATREYA ,  MACCHESNEY JOHN BURNETTE ,  JOHNSON DAVID WILFRED JR ,  STOCKERT THOMAS EDWARD

    IPC: C03B8/02 ,  C01B33/141 ,  C03C1/00

    Abstract: PROBLEM TO BE SOLVED: To attain superior dispersion efficiency by adjusting the pH of a silica-water mixture before or during dispersion when a sol is produced in the production of a quartz glass product. SOLUTION: Water is charged into the drum 10 of a dispersing device and an aq. soln. of tetramethylammonium hydroxide (TMAH) having 25vol.% concn. is added as an alkaline additive by an amt. required to attain the desired pH. Fumed silica powder having 55nm particle diameter equivalent to the diameter of a sphere and about 50m /g specific surface area is then added in several stages while mixing part of the silica. During this addition, the dispersing device is turned at 4,200r.p.m. (about 30m/sec top speed) for 3Omin. Enough additional TMAH and water are added to a sol prepd. by mixing under shear if necessary and the pH is increased to a stable value of 12.8 in consideration of the measured value of final viscosity. By the addition of the pH adjusting agent, attraction among particles is increased and gelling is started. By the increased pH, the viscosity of the sol is increased and dispersion efficiency is enhanced.

    METHOD OF PRODUCING MICROSTRUCTURED OPTICAL FIBER
    2.
    发明专利
    METHOD OF PRODUCING MICROSTRUCTURED OPTICAL FIBER 审中-公开

    公开(公告)号：JP2002068771A

    公开(公告)日：2002-03-08

    申请号：JP2001211092

    申请日：2001-07-11

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： DE HAZAN YORAM ,  MACCHESNEY JOHN BURNETTE ,  STOCKERT THOMAS EDWARD ,  TREVOR DENNIS J ,  WINDELER ROBERT SCOTT

    IPC: G02B6/00 ,  C03B19/12 ,  C03B37/012 ,  C03B37/016 ,  G02B6/02 ,  G02B6/032 ,  G02B6/20

    Abstract: PROBLEM TO BE SOLVED: To provide a method capable of producing an optical fiber strong against staining, and having microstructure and a reduced operation by workers. SOLUTION: This method of producing the microstructured optical fiber comprises a step wherein a cylindrical container and a plurality of elongated members extending to at least a part of the length of the cylindrical container are prepared, a process wherein the elongated members are hold at a predetermined space with respect to the container and at least a part of the container is filled with a sol including silica and the sol is changed to a gel, a process wherein the gel body having the plurality of the elongated members is formed and the gel body is separated from the elongated body or the elongated member is separated from the container, and a process wherein the gel body is dried, purified, and sintered and the microstructured optical fiber is pulled out from the sintered gel body.

    METHOD FOR PRODUCING OPTICAL FIBER
    4.
    发明专利
    METHOD FOR PRODUCING OPTICAL FIBER 审中-公开

    公开(公告)号：JP2002226226A

    公开(公告)日：2002-08-14

    申请号：JP2002000109

    申请日：2002-01-04

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： DE HAZAN YORAM ,  MAC CHESNEY JOHN BURNETTE ,  STOCKERT THOMAS EDWARD ,  CHRISTOPHER ALAN WHITE

    IPC: G02B6/00 ,  C03B37/014

    Abstract: PROBLEM TO BE SOLVED: To provide a new fluorine doping method. SOLUTION: Treating time required for fluorine doping of a porous silica body to produce a fluorine doped preform for producing an optical fiber having lowered refractive index is shortened by the division of a doping step into a preliminary heaping step for heaping 'excess amount' of fluorine on silica particles and a drive-in step for diffusing fluorine atom in the silica particles. As the drive-in step is assembled easily with a sintering step or a consolidating step, doping treatment efficiency is increased furthermore.

    5.
    发明专利
    未知

    公开(公告)号：DE69809167D1

    公开(公告)日：2002-12-12

    申请号：DE69809167

    申请日：1998-09-08

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FLEMING DEBRA ANNE ,  JOHNSON DAVID WILFRED JR ,  HUBBAUER PHILIP ,  MACCHESNEY JOHN BURNETTE ,  STOCKERT THOMAS EDWARD ,  WALZ FREDERICK W JR

    IPC: C03B8/02 ,  C03B19/12 ,  C03B20/00 ,  C03B37/012 ,  C04B35/14 ,  C04B35/624

    Abstract: The invention is a sol-gel extrusion process which allows fabrication of both thick and thin wall tubes. For example, the process is capable of preparing silica overcladding tubes in a manner easier than sol-gel casting processes, and also capable of preparing relatively thin substrate tubes, which are difficult to cast. According to the invention, a silica dispersion containing a stabilizing agent is provided, a gelling agent is added to the dispersion to induce gellation, and the resultant gel is extruded into a silica body, in the substantial absence, i.e. less than 0.5%wt., of polymeric material from the gel. Substantially avoiding the inclusion of such polymeric material in overcladding and substrate tubes offers significant commercial advantages by reducing the time and energy required to remove organic materials from the tube bodies, by reducing environmental impact and by reducing the amount of impurities introduced in the tubes.

    6.
    发明专利
    未知

    公开(公告)号：DE60107375D1

    公开(公告)日：2004-12-30

    申请号：DE60107375

    申请日：2001-08-14

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： DE HAZAN YORAM ,  MAC CHESNEY JOHN BURNETTE ,  STOCKERT THOMAS EDWARD ,  WHITE CHRISTOPHER ALAN

    IPC: G02B6/00 ,  C03B37/014

    Abstract: The process time required for fluorine doping of porous silica bodies to produce fluorine doped preforms for the manufacture of depressed index optical fibers is reduced by separating the doping step into a predeposit step, where "excess" fluorine is deposited on the silica particles within the porous silica body, and a drive-in step where atomic fluorine is distributed into the silica particles. The drive-in step is conveniently combined with the sintering or consolidation step to further enhance the efficiency of the doping process and is carried out at a temperature above 1300 DEG C in an atmosphere devoid of fluorine.

    8.
    发明专利
    未知

    公开(公告)号：DE60107375T2

    公开(公告)日：2005-11-24

    申请号：DE60107375

    申请日：2001-08-14

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： DE HAZAN YORAM ,  MAC CHESNEY JOHN BURNETTE ,  STOCKERT THOMAS EDWARD ,  WHITE CHRISTOPHER ALAN

    IPC: G02B6/00 ,  C03B37/014

    Abstract: The process time required for fluorine doping of porous silica bodies to produce fluorine doped preforms for the manufacture of depressed index optical fibers is reduced by separating the doping step into a predeposit step, where "excess" fluorine is deposited on the silica particles within the porous silica body, and a drive-in step where atomic fluorine is distributed into the silica particles. The drive-in step is conveniently combined with the sintering or consolidation step to further enhance the efficiency of the doping process and is carried out at a temperature above 1300 DEG C in an atmosphere devoid of fluorine.

    10.
    发明专利
    未知

    公开(公告)号：DE69809167T2

    公开(公告)日：2003-07-24

    申请号：DE69809167

    申请日：1998-09-08

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： FLEMING DEBRA ANNE ,  JOHNSON DAVID WILFRED JR ,  HUBBAUER PHILIP ,  MACCHESNEY JOHN BURNETTE ,  STOCKERT THOMAS EDWARD ,  WALZ FREDERICK W JR

    IPC: C03B8/02 ,  C03B19/12 ,  C03B20/00 ,  C03B37/012 ,  C04B35/14 ,  C04B35/624

    Abstract: The invention is a sol-gel extrusion process which allows fabrication of both thick and thin wall tubes. For example, the process is capable of preparing silica overcladding tubes in a manner easier than sol-gel casting processes, and also capable of preparing relatively thin substrate tubes, which are difficult to cast. According to the invention, a silica dispersion containing a stabilizing agent is provided, a gelling agent is added to the dispersion to induce gellation, and the resultant gel is extruded into a silica body, in the substantial absence, i.e. less than 0.5%wt., of polymeric material from the gel. Substantially avoiding the inclusion of such polymeric material in overcladding and substrate tubes offers significant commercial advantages by reducing the time and energy required to remove organic materials from the tube bodies, by reducing environmental impact and by reducing the amount of impurities introduced in the tubes.

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