公开(公告)号：DE69212922T2

公开(公告)日：1997-02-20

申请号：DE69212922

申请日：1992-01-20

Applicant: CORNING INC

Inventor： BERKEY GEORGE EDWARD ,  HAWK ROBERT MARTIN ,  TARCZA STEVEN HOWARD

IPC: C03B37/012 ,  C03B37/014 ,  C03B37/027 ,  G02B6/024

Abstract: There is initially formed a draw blank having diametrically opposed longitudinal apertures in the cladding glass parallel to the core glass region. The draw blank is drawn into a fiber under such conditions that the apertures close as the fiber is being drawn. The flow of surrounding glass, including the core glass region, toward the collapsing apertures, causes the core to assume an elliptical shape. The apertures are of such cross-sectional area and spacing from the core that the core develops the desired aspect ratio.

公开(公告)号：DE69132840D1

公开(公告)日：2002-01-10

申请号：DE69132840

申请日：1991-09-11

Applicant: CORNING INC

Inventor： HAWK ROBERT MARTIN ,  TARCZA STEVEN HOWARD

IPC: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  C03B37/02 ,  C03C15/00 ,  C03C25/68 ,  G02B6/024

Abstract: A method is provided of forming an elongated glass article, comprising providing a tubular glass handle having a mandrel protruding from one end thereof, rotating the combination of mandrel and tube, and directing toward the rotating mandrel and an end portion of the tube a stream of glass particles comprising SiO 2 doped with at least 15 wt. % B 2 O 3 while reciprocating said mandrel and tube with respect to said stream to build up a porous glass coating. The mandrel is then removed from the porous glass coating and tube to form an assembly of handle and tubular porous preform. The porous preform is heated to consolidate it to a dense glass preform having an axial aperture, and to fuse the dense glass preform to the handle. NF 3 is flowed through the aperture while maintaining the temperature of the consolidated preform above 600°C but below that temperature which would cause the substantial elongation of the blank.

公开(公告)号：ES2090370T3

公开(公告)日：1996-10-16

申请号：ES92100832

申请日：1992-01-20

Applicant: CORNING INC

Inventor： BERKEY GEORGE EDWARD ,  HAWK ROBERT MARTIN ,  TARCZA STEVEN HOWARD

IPC: C03B37/012 ,  C03B37/014 ,  C03B37/027 ,  G02B6/024

Abstract: There is initially formed a draw blank having diametrically opposed longitudinal apertures in the cladding glass parallel to the core glass region. The draw blank is drawn into a fiber under such conditions that the apertures close as the fiber is being drawn. The flow of surrounding glass, including the core glass region, toward the collapsing apertures, causes the core to assume an elliptical shape. The apertures are of such cross-sectional area and spacing from the core that the core develops the desired aspect ratio.

公开(公告)号：DE69125913D1

公开(公告)日：1997-06-05

申请号：DE69125913

申请日：1991-09-11

Applicant: CORNING INC

Inventor： BERKEY GEORGE EDWARD ,  BHAGAVATULA VENKATA ADISESHAIA ,  HAWK ROBERT MARTIN ,  TARCZA STEVEN HOWARD

IPC: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  C03B37/02 ,  C03C15/00 ,  C03C25/68 ,  G02B6/024 ,  C03B37/027 ,  C03B23/207

Abstract: A method is provided of forming an elongated glass article, comprising providing a tubular glass handle having a mandrel protruding from one end thereof, rotating the combination of mandrel and tube, and directing toward the rotating mandrel and an end portion of the tube a stream of glass particles comprising SiO 2 doped with at least 15 wt. % B 2 O 3 while reciprocating said mandrel and tube with respect to said stream to build up a porous glass coating. The mandrel is then removed from the porous glass coating and tube to form an assembly of handle and tubular porous preform. The porous preform is heated to consolidate it to a dense glass preform having an axial aperture, and to fuse the dense glass preform to the handle. NF 3 is flowed through the aperture while maintaining the temperature of the consolidated preform above 600°C but below that temperature which would cause the substantial elongation of the blank.

公开(公告)号：AU648181B2

公开(公告)日：1994-04-14

申请号：AU1866992

申请日：1992-06-30

Applicant: CORNING INC

Inventor： HAWK ROBERT MARTIN ,  BERKEY GEORGE EDWARD ,  TARCZA STEVEN HOWARD

IPC: C03B37/012 ,  C03B37/014 ,  C03B37/027 ,  G02B6/024

Abstract: There is initially formed a draw blank having diametrically opposed longitudinal apertures in the cladding glass parallel to the core glass region. The draw blank is drawn into a fiber under such conditions that the apertures close as the fiber is being drawn. The flow of surrounding glass, including the core glass region, toward the collapsing apertures, causes the core to assume an elliptical shape. The apertures are of such cross-sectional area and spacing from the core that the core develops the desired aspect ratio.

公开(公告)号：DE69125913T2

公开(公告)日：1997-12-04

申请号：DE69125913

申请日：1991-09-11

Applicant: CORNING INC

Inventor： BERKEY GEORGE EDWARD ,  BHAGAVATULA VENKATA ADISESHAIA ,  HAWK ROBERT MARTIN ,  TARCZA STEVEN HOWARD

IPC: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  C03B37/02 ,  C03C15/00 ,  C03C25/68 ,  G02B6/024 ,  C03B37/027 ,  C03B23/207

Abstract: A method is provided of forming an elongated glass article, comprising providing a tubular glass handle having a mandrel protruding from one end thereof, rotating the combination of mandrel and tube, and directing toward the rotating mandrel and an end portion of the tube a stream of glass particles comprising SiO 2 doped with at least 15 wt. % B 2 O 3 while reciprocating said mandrel and tube with respect to said stream to build up a porous glass coating. The mandrel is then removed from the porous glass coating and tube to form an assembly of handle and tubular porous preform. The porous preform is heated to consolidate it to a dense glass preform having an axial aperture, and to fuse the dense glass preform to the handle. NF 3 is flowed through the aperture while maintaining the temperature of the consolidated preform above 600°C but below that temperature which would cause the substantial elongation of the blank.

公开(公告)号：DE69212922D1

公开(公告)日：1996-09-26

申请号：DE69212922

申请日：1992-01-20

Applicant: CORNING INC

Inventor： BERKEY GEORGE EDWARD ,  HAWK ROBERT MARTIN ,  TARCZA STEVEN HOWARD

IPC: C03B37/012 ,  C03B37/014 ,  C03B37/027 ,  G02B6/024

Abstract: There is initially formed a draw blank having diametrically opposed longitudinal apertures in the cladding glass parallel to the core glass region. The draw blank is drawn into a fiber under such conditions that the apertures close as the fiber is being drawn. The flow of surrounding glass, including the core glass region, toward the collapsing apertures, causes the core to assume an elliptical shape. The apertures are of such cross-sectional area and spacing from the core that the core develops the desired aspect ratio.

公开(公告)号：AU627313B2

公开(公告)日：1992-08-20

申请号：AU5599090

申请日：1990-05-28

Applicant: CORNING INC

Inventor： BERKEY GEORGE EDWARD ,  HAWK ROBERT MARTIN

IPC: C03B37/027 ,  C03B37/028 ,  C03C25/10 ,  G02B6/024 ,  G02B6/04 ,  G02B6/10 ,  G02B6/255 ,  G02B6/26 ,  G02B6/28 ,  G02B6/44 ,  G02B6/16 ,  G02B6/02 ,  G02B6/38 ,  B29C55/30

Abstract: To fabricate polarization retaining couplers, the fibers must be kept untwisted and must be maintained parallel to one another, and the major axes of the polavitation-retaining single mode (PRSM) (115,116) fibers must be maintained substantially parallel to one another. It is noted that this orientation includes that orientation wherein the major axes are substantially coaxial. The method of the present invention is characterized in that the fiber coating material is utilized to facilitate the alignment of the major axes of the fibers. In a first described embodiment, each fiber is provided with a rectangularly shaped coating (117,118), and the two larger flattened sides of the coating are specifically oriented with respect to the major and minor axes of the PRSM fiber therein. Cores (141) and (143) of optical fibers (115) and (116), respectively, are elliptically-shaped, and the minor axis of each core is parallel to the long flat sides of the rectangularly-shaped coating. In one embodiment, tube (110) is heated and collapsed onto fibers (115) and (116) in a step that is separate from the step of stretching the midregion of tube (110). The flame from burner (129) is directed onto midregion (128) to heat glass tube (110) to its softening point. Burner (129) may remain stationary, or it may traverse midregion (128) in the direction toward vacuum source (126) as shown by arrow (130). It is an optional feature of the tube collapse step to apply a vacuum source to both hollow filaments (121) and (122), in which case the direction of burner traverse is immaterial. Midregion (128) becomes a solid region that is preferably free of air lines, bubbles, or the like.

公开(公告)号：DE69132840T2

公开(公告)日：2002-04-11

申请号：DE69132840

申请日：1991-09-11

Applicant: CORNING INC

Inventor： HAWK ROBERT MARTIN ,  TARCZA STEVEN HOWARD

IPC: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  C03B37/02 ,  C03C15/00 ,  C03C25/68 ,  G02B6/024

Abstract: A method is provided of forming an elongated glass article, comprising providing a tubular glass handle having a mandrel protruding from one end thereof, rotating the combination of mandrel and tube, and directing toward the rotating mandrel and an end portion of the tube a stream of glass particles comprising SiO 2 doped with at least 15 wt. % B 2 O 3 while reciprocating said mandrel and tube with respect to said stream to build up a porous glass coating. The mandrel is then removed from the porous glass coating and tube to form an assembly of handle and tubular porous preform. The porous preform is heated to consolidate it to a dense glass preform having an axial aperture, and to fuse the dense glass preform to the handle. NF 3 is flowed through the aperture while maintaining the temperature of the consolidated preform above 600°C but below that temperature which would cause the substantial elongation of the blank.

公开(公告)号：CA2060016C

公开(公告)日：2002-04-09

申请号：CA2060016

申请日：1992-01-24

Applicant: CORNING INC

Inventor： BERKEY GEORGE EDWARD ,  HAWK ROBERT MARTIN ,  TARCZA STEVEN HOWARD

IPC: C03B37/012 ,  C03B37/014 ,  C03B37/027 ,  G02B6/024

Abstract: Disclosed is a method of making a polarization retaining single-mode optical fiber. There is initially formed a draw blank having diametrically opposed longitudinal apertures in the cladding glass parallel to the core glass region. The draw blank is drawn into a fiber under such conditions that the apertures close as the fiber is being drawn. The flow of surrounding glass, including the core glass region, toward the collapsing apertures, causes the core to assume an elliptical shape. The apertures are of such cross-sectional area and spacing from the core that the core develops the desired aspect ratio.