公开(公告)号：AU2003211466A1

公开(公告)日：2003-09-16

申请号：AU2003211466

申请日：2003-03-04

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： TSUCHIYA ICHIRO ,  ISHIKAWA SHINJI ,  YOSHIDA MOTOHIDE ,  HARUNA TETSUYA ,  SOMA KAZUYUKI ,  OKAZAKI IWAO

IPC: C03B37/012 ,  G02B6/024 ,  G02B6/10 ,  G02B6/16

Abstract: Based on an intermediate 20 A in which a cladding portion 22 is formed on the outer periphery of a core portion 21 , a pair of holes 23 and 24 are provided parallel to the z axis on both sides of the core portion 21 within the cladding portion 22 , and an intermediate 20 is thereby fabricated. In this intermediate 20 , a width Ry in the y-axis direction is made smaller than a width Rx in the x-axis direction. Moreover, a cylindrical stress applying part 33 is inserted into a hole 23 of the intermediate 20 , and a cylindrical stress applying part 34 is inserted into a hole 24 thereof. Thus, a preform 40 is formed. These materials are drawn and integrated together, and a polarization maintaining optical fiber is thereby manufactured.

公开(公告)号：EP1394124A4

公开(公告)日：2007-03-07

申请号：EP03701720

申请日：2003-01-15

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： TANADA HARUYOSHI ,  NAKAMURA MOTONORI ,  OHGA YUICHI ,  ENOMOTO TADASHI ,  HIRANO MASAAKI ,  ONISHI MASASHI ,  SOMA KAZUYUKI ,  MORIYA TOMOMI ,  YANADA EIJI

IPC: C03B23/045 ,  C03B19/14 ,  C03B23/047 ,  C03B23/049 ,  C03B37/012

CPC classification number: C03B37/01254 ,  C03B19/1469 ,  C03B23/045 ,  C03B23/0493 ,  C03B23/0496

Abstract: A method and a device for manufacturing a glass tube, the method wherein a diameter expanding member is inserted into a hole in a tubular glass material to increase the diameter of the hole while maintaining a glass material temperature at the softening point or higher of the glass material, the tubular glass material may be purchased or manufactured, and the diameter of the hole in the glass material may be increased while supporting the diameter increasing material at least at the rear end thereof or while supporting the diameter increasing material at both ends thereof; the device comprising a means for moving the diameter expanding member and the glass material relative to each other so that a heating member for heating the tubular glass material from the periphery, the diameter expanding member insertable into the glass material, a support member for supporting both ends of the diameter expanding member, and the diameter expanding member can be inserted into the hole in the glass material.

公开(公告)号：JP2003238177A

公开(公告)日：2003-08-27

申请号：JP2002038632

申请日：2002-02-15

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： SOMA KAZUYUKI ,  ONISHI MASASHI

IPC: G02B6/00 ,  C03B20/00 ,  C03B23/045 ,  C03B23/049 ,  C03B37/012

Abstract: PROBLEM TO BE SOLVED: To provide a quartz pipe capable of forming a preform for optical fibers having excellent properties wherein quartz pipe has a through hole having an excellent axial positioning accuracy and less distribution of the outer diame ter (a rotating state of the outer surface) when piercing. SOLUTION: The method comprises a heating step for heating a desired area of a glass material containing quartz as the main component to form a softened area, a positioning step for positioning a jig for penetrating against the glass material, and a piercing step for forming a through hole in the softened area of the glass material by penetrating the jig for penetrating into the glass material in the lengthwise direction of the glass material. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2003226531A

公开(公告)日：2003-08-12

申请号：JP2002028779

申请日：2002-02-05

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： SOMA KAZUYUKI ,  ONISHI MASASHI

IPC: C03B20/00 ,  C03B23/045 ,  C03B23/26 ,  C03B37/012

Abstract: PROBLEM TO BE SOLVED: To provide a quartz pipe which has uniform outside diameter distribution, small noncircularity, small eccentricity and excellent characteristics. SOLUTION: An apparatus for manufacturing the quartz pipe is provided with a heating means 6 for successively heating required regions of a glass raw material 1 consisting essentially of quartz to form softened regions and a penetrative jig 3 for forming an opening in the softened region of the glass raw material 1 by being penetrated in a longitudinal direction of the glass raw material 1 to form the quartz pipe. The penetrative jig 3 is provided with a top 3P constituting a penetrating region into the glass raw material and a supporting rod 3R having a taper part 3T an outside diameter of which gradually decreases as leaves the top. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2003221250A

公开(公告)日：2003-08-05

申请号：JP2002022456

申请日：2002-01-30

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： TADA HIKARI ,  SOMA KAZUYUKI

IPC: G02B6/00 ,  C03B20/00 ,  C03B23/045 ,  C03B23/049 ,  C03B37/012

Abstract: PROBLEM TO BE SOLVED: To stably manufacture a high-quality fused silica tube necessary for a high-grade optical fiber by preventing the adhesion of dust and water or the like in the air to a fused silica material. SOLUTION: The method for manufacturing the fused silica tube comprises heating a fused silica ingot 13 with a heating element 41 enclosing the ingot 13, and simultaneously applying a piercing tip 17 to the ingot 13 and pressing the tip 17 into the ingot so as to gradually form the ingot 13 into a cylindrical fused silica tube 16 while the space 50 between the heating element 41 and the ingot 13 and the space 52 in the tube 16 formed by the intrusion of the piercing tip 17 are maintained in an inert gas atmosphere. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2003226530A

公开(公告)日：2003-08-12

申请号：JP2002028437

申请日：2002-02-05

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： HIRANO MASAAKI ,  ONISHI MASASHI ,  SOMA KAZUYUKI

IPC: G02B6/00 ,  C03B20/00 ,  C03B37/012 ,  G02B6/036 ,  G02B6/22

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a quartz glass pipe and a method for producing an optical fiber preform to produce a quartz glass pipe having a small difference in the ratio of outside diameter to inside diameter, to produce an optical fiber preform using this quartz glass pipe and to produce an optical fiber having a small variation in zero dispersion wavelength in the lengthwise direction using this optical fiber preform and to provide an optical fiber. SOLUTION: The quartz glass pipe having a small variation in the ratio of outside diameter to inside diameter is produced by grinding the periphery of a quartz glass pipe according to its inside diameter change. A quartz glass pipe is drawn in such a way as to obtain a uniform outside diameter to produce the objective quartz glass pipe. The optical fiber preform is produced by inserting a glass rod including a core into the produced quartz glass pipe and carrying out rod-in collapse. This optical fiber preform is converted to an optical fiber to produce the objective optical fiber having ≤0.5%/10 km variation in zero dispersion wavelength in the lengthwise direction. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2003221247A

公开(公告)日：2003-08-05

申请号：JP2002022451

申请日：2002-01-30

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： ONISHI MASASHI ,  SOMA KAZUYUKI

IPC: G02B6/00 ,  C03B20/00 ,  C03B23/045 ,  C03B37/012

Abstract: PROBLEM TO BE SOLVED: To provide a manufacturing method for a glass pipe for optical fibers, where the variation in its residual stress and its dimension can be prevented by drilling it under a constant viscosity, and to provide a manufacturing apparatus therefor. SOLUTION: The pressure generated when a glass material 37 is penetrated with a drilling jig 48 is detected by a penetrating pressure detecting means 12. The state of softening of the glass material 37 can be judged by feeding back the detection signals of the means to a controlling device 11. Namely, when the penetrating pressure is small, the heating by a heating means 31 is weakened by a controlling means 11 to lower temperature so that the material is made less soft; on the other hand, when the penetrating pressure is large, the heating by the heating means 31 is strengthened by the controlling means 11 to raise temperature so that the material is made more soft. Thereby, the glass material 37 to be drilled can be drilled under a constant viscosity. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2003226533A

公开(公告)日：2003-08-12

申请号：JP2002024607

申请日：2002-01-31

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： SOMA KAZUYUKI ,  ONISHI MASASHI

IPC: G02B6/00 ,  C03B20/00 ,  C03B23/045 ,  C03B23/049 ,  C03B37/012

Abstract: PROBLEM TO BE SOLVED: To provide a method for producing a quartz pipe having little dislocation of the center, a uniform thickness and lower surface roughness of the inner face. SOLUTION: In the method for producing a quartz pipe by softening a quartz- base glass rod 1 by heating, and piercing a hole in the central part of the rod by making a plug 3 intrude into the rod in the lengthwise direction, when the hole is pierced, the glass rod 1 and the plug 3 are rotated in the same direction at different rotational speeds. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2003137582A

公开(公告)日：2003-05-14

申请号：JP2001325980

申请日：2001-10-24

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： NAKAMURA MOTONORI ,  SOMA KAZUYUKI

IPC: C03B37/012

Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing an optical fiber preform capable of restricting production of OH in a process of drawing or fire polishing. SOLUTION: The method for manufacturing the optical fiber preform is that a glass particulate produced by hydrolytic reaction between a raw material and an oxyhydrogen flame is deposited on the outer periphery of rotating starter rod in VAD method or OVD method, and formed into a porous preform in an axial direction, after that the porous preform is vitrified to be transparent. Wherein the method is characterized in that a mole ratio of hydrogen/oxygen of the oxyhydrogen flame used in the process of drawing or fire polishing is