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    HEAT TREATMENT OF SILICA-BASE GLASS
    1.
    发明专利
    HEAT TREATMENT OF SILICA-BASE GLASS 失效

    公开(公告)号：JPH10139460A

    公开(公告)日：1998-05-26

    申请号：JP20897897

    申请日：1997-08-04

    Applicant: CORNING INC

    Inventor： ANTOS ALFRED JOSEPH ,  CHU POLLY

    IPC: G02B6/00 ,  C03B8/04 ,  C03B19/14 ,  C03B32/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  C03C13/04 ,  H01S3/067

    Abstract: PROBLEM TO BE SOLVED: To obtain a slender bubbleless glass material by laminating a glass soot onto a substrate, sintering a porous part into a dense glass, drawing the resultant glass, affording a glass cane and heat-treating the formed glass cane at a high temperature in a short time. SOLUTION: A glass cane 14 is uniformly heated over the total length in a furnace 16 in a control led time to reduce bubbles. The diameter of the cane 14 is preferably 5-10mm. The figure shows a core cane 30 during the heat treatment in a high-temperature region 44 in the furnace 42 and the core cane 30 is heated in the interior of the furnace 42. The high-temperature region 44 is achieved with a heating means 45 and maintained at 1,490-1,495 deg.C. A chuck 46 is capable of holding one end of the core cane 30 and a shaft 48 is capable of connecting the chuck 46 to a rotating motor. The core cane 30 is driven at a constant speed, preferably about 6mm/min back and forth in the interior of the high-temperature region 44. The core cane 30 is rotated at about 3.5 revolutions/min during the crossing a muffle.

    3.
    发明专利
    未知

    公开(公告)号：DE69029793T2

    公开(公告)日：1997-08-07

    申请号：DE69029793

    申请日：1990-11-20

    Applicant: CORNING INC

    Inventor： ANTOS ALFRED JOSEPH ,  DOBBINS MICHAEL SEAN ,  OLSON III VICTOR ERLAND ,  POWERS DALE ROBERT ,  VOORHEES FRANCIS WORDEN

    IPC: B01D1/22 ,  C03B37/014 ,  C03B37/018 ,  C23C14/24 ,  C23C16/44 ,  C23C16/448

    Abstract: A system for delivering a liquid reactant (2) at high flow rates to an oxidation/flame hydrolysis glass soot deposition site (10). A first liquid only reactant (2) is delivered (7,4) to a vaporization chamber (1) to form a thin film and mixed with oxygen (20) after vaporization. Additional vaporized reactants (30) are thereafter mixed (11) with the vaporized first liquid (1) prior to delivery to an oxidation/flame hydrolysis burner (10) to form a glass soot outer cladding layer on a soot preform. The soot preform is subsequently fused to form a high quality glass blank for drawing into optical fiber.

    Optical fiber resistant to hydrogen-induced attenuation
    5.
    发明专利
    Optical fiber resistant to hydrogen-induced attenuation 未知

    公开(公告)号：AU715842B2

    公开(公告)日：2000-02-10

    申请号：AU7049896

    申请日：1996-10-30

    Applicant: CORNING INC

    Inventor： ANTOS ALFRED JOSEPH ,  HUNT TIMOTHY ,  POWERS DALE ROBERT ,  WHEDON WILLIAM ANTHONY

    IPC: G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  C03C13/04 ,  G02B6/02 ,  G02B6/036 ,  G02B6/44 ,  C03B37/023

    Abstract: Improved single-mode optical waveguide fibers comprising a central core (10) region, surrounded by an inner cladding region (22) through which light at a chosen signal wavelength will propagate to an appreciable degree along with propagation of same in the central core region (10), the inner core region further surrounded by an outer cladding region (17), the improvement comprising germanium dioxide in the inner cladding region (22) at a concentration within the range of about .005 percent by weight to about 1 percent by weight of said inner cladding region (22), effective to significantly reduce the concentration of oxygen atoms in the inner cladding region (22) which are available to form defects that cause hydrogen-induced attenuation. Also provided are core preforms, overclad preforms, and processes for making the fibers, core preforms and overclad preforms.

    6.
    发明专利
    未知

    公开(公告)号：BR9610421A

    公开(公告)日：1999-07-06

    申请号：BR9610421

    申请日：1996-07-22

    Applicant: CORNING INC

    Inventor： ANTOS ALFRED JOSEPH

    IPC: G02B6/024 ,  C03B37/012 ,  C03B37/02 ,  G02B6/02 ,  G02B6/028 ,  G02B6/10 ,  G02B6/17

    Abstract: Disclosed is a single mode optical waveguide fiber having periodic perturbations in the core to provide a birefringence which mixes the polarization modes of launched light. In addition, perturbations are introduced into the core which serve to manage total dispersion. The total dispersion of pre-selected segments of the waveguide are caused to change sign so that the sum of products, total dispersion times length, algebraically add to a pre-selected value. The two distinct core perturbation types serve to control both polarization mode dispersion and total dispersion. Methods for making the subject waveguide are also discussed.

    7.
    发明专利
    未知

    公开(公告)号：DE69530969D1

    公开(公告)日：2003-07-10

    申请号：DE69530969

    申请日：1995-12-06

    Applicant: CORNING INC

    Inventor： ANTOS ALFRED JOSEPH ,  DELISO EVELYN MCGEE ,  LIU YANMING ,  NEWHOUSE MARK ANDREW ,  SMITH DAVID KINNEY ,  TRUESDALE CARLTON MAURICE

    IPC: G02B6/028 ,  G02B6/036 ,  G02B6/22

    Abstract: A single mode optical waveguide fiber having low, non-zero dispersion over a pre-selected wavelength range is disclosed. The refractive index profile of the core is characterized in that the core includes a plurality of distinct regions, each having an index profile, and a radius or width. By adjusting the index profile sizes and shapes of the plurality of core regions, a waveguide fiber may be made having a set of properties tailored for a high performance telecommunication system. In particular, dispersion slope can be maintained less than 0.05 ps/nm -km and absolute magnitude of total dispersion maintained in the range of 0.5 to 3.5 ps/nm-km over a pre-selected wavelength range. The zero dispersion wavelength is outside the pre-selected wavelength range and the cut off wavelength and mode field diameter are controlled to target values.

    Controlled dispersion optical waveguide
    8.
    发明专利
    Controlled dispersion optical waveguide 未知

    公开(公告)号：AU689673B2

    公开(公告)日：1998-04-02

    申请号：AU4054395

    申请日：1995-12-20

    Applicant: CORNING INC

    Inventor： ANTOS ALFRED JOSEPH ,  DELISO EVELYN MCGEE ,  LIU YANMING ,  NEWHOUSE MARK ANDREW ,  SMITH DAVID KINNEY ,  TRUESDALE CARLTON MAURICE

    IPC: G02B6/028 ,  G02B6/036 ,  G02B6/18

    Abstract: A single mode optical waveguide fiber having low, non-zero dispersion over a pre-selected wavelength range is disclosed. The refractive index profile of the core is characterized in that the core includes a plurality of distinct regions, each having an index profile, and a radius or width. By adjusting the index profile sizes and shapes of the plurality of core regions, a waveguide fiber may be made having a set of properties tailored for a high performance telecommunication system. In particular, dispersion slope can be maintained less than 0.05 ps/nm -km and absolute magnitude of total dispersion maintained in the range of 0.5 to 3.5 ps/nm-km over a pre-selected wavelength range. The zero dispersion wavelength is outside the pre-selected wavelength range and the cut off wavelength and mode field diameter are controlled to target values.

    10.
    发明专利
    未知

    公开(公告)号：DE69029793D1

    公开(公告)日：1997-03-06

    申请号：DE69029793

    申请日：1990-11-20

    Applicant: CORNING INC

    Inventor： ANTOS ALFRED JOSEPH ,  DOBBINS MICHAEL SEAN ,  OLSON III VICTOR ERLAND ,  POWERS DALE ROBERT ,  VOORHEES FRANCIS WORDEN

    IPC: B01D1/22 ,  C03B37/014 ,  C03B37/018 ,  C23C14/24 ,  C23C16/44 ,  C23C16/448

    Abstract: A system for delivering a liquid reactant (2) at high flow rates to an oxidation/flame hydrolysis glass soot deposition site (10). A first liquid only reactant (2) is delivered (7,4) to a vaporization chamber (1) to form a thin film and mixed with oxygen (20) after vaporization. Additional vaporized reactants (30) are thereafter mixed (11) with the vaporized first liquid (1) prior to delivery to an oxidation/flame hydrolysis burner (10) to form a glass soot outer cladding layer on a soot preform. The soot preform is subsequently fused to form a high quality glass blank for drawing into optical fiber.

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