公开(公告)号：ZA200004539B

公开(公告)日：2001-05-30

申请号：ZA200004539

申请日：2000-08-31

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA ADISESHAIA ,  BERKEY GEORGE E

IPC: G02B6/00 ,  C03B23/20 ,  C03B37/012 ,  G02B6/02 ,  C03B

Abstract: Different pieces of glass (81, 82) are fused together to create a preform (94) from which a glass fiber with axially varying properties is drawn.

公开(公告)号：ZA992715B

公开(公告)日：1999-10-14

申请号：ZA992715

申请日：1999-04-14

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA ADISESHAIA ,  EVANS ALAN FRANK

IPC: G02B6/02 ,  G02B6/34 ,  H01S3/06 ,  H01S3/10 ,  H04B10/02 ,  H04B10/18 ,  H01P ,  G02B ,  C03B ,  C03C

Abstract: A unitary dispersion managed waveguide fiber with distributed amplification and a system incorporating the waveguide fiber are disclosed. Total dispersion along the waveguide fiber changes from positive to negative along the length of the waveguide over a transmission wavelength range. Distributed amplification is provided by stimulated emission of a dilute concentration of a rare earth dopant in the waveguide, by Raman effects or by both.

公开(公告)号：ZA9902715B

公开(公告)日：1999-10-14

申请号：ZA9902715

申请日：1999-04-14

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA ADISESHAIA ,  EVANS ALAN FRANK

IPC: G02B6/02 ,  G02B6/34 ,  H01S3/06 ,  H01S3/10 ,  H04B10/02 ,  H04B10/18 ,  H01P ,  C03B ,  C03C ,  G02B

CPC classification number: G02B6/29374 ,  G02B6/03627 ,  G02B6/03644 ,  G02B6/03694 ,  G02B6/29377 ,  G02B6/29394 ,  H04B10/25253

公开(公告)号：DE69127680T2

公开(公告)日：1998-03-12

申请号：DE69127680

申请日：1991-11-12

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA ADISESHAIA

IPC: G02B6/12 ,  G02B6/13

Abstract: A method of manufacturing planar optical waveguides in which a planar optical preform which is stretched to form a planar optical cane with substantially smaller cross-sectional dimensions than the original preform, and in which the optical circuitry pattern is achieved by lithographic techniques. Optical fiber preforms may be inserted in slots in a substrate to form the planar optical preform.

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：AU8834291A

公开(公告)日：1992-06-11

申请号：AU8834291

申请日：1991-12-02

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA ADISESHAIA

IPC: G02B6/12 ,  G02B6/13 ,  G02B6/10 ,  C03B37/027 ,  C03B19/01 ,  C03C15/00

Abstract: A method of manufacturing planar optical waveguides in which a planar optical preform which is stretched to form a planar optical cane with substantially smaller cross-sectional dimensions than the original preform, and in which the optical circuitry pattern is achieved by lithographic techniques. Optical fiber preforms may be inserted in slots in a substrate to form the planar optical preform.

公开(公告)号：HK88790A

公开(公告)日：1990-11-09

申请号：HK88790

申请日：1990-11-01

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA ADISESHAIA

IPC: G02B6/028 ,  G02B20060101 ,  G02B6/036 ,  H01P3/00 ,  G02B6/22

Abstract: The core (19) is surrounded by a layer of cladding material (20) and includes a region (22) of depressed refractive index. The inner radius (ai) of this region (22) is greater than zero, and the outer radius (ao) thereof is less than the core radius (a). By appropriately selecting the core index depression (22) characteristics such as radial location, width, depth and shape, a fiber having the desired waveguide dispersion characteristics can be designed. Dispersion minimization over a wide wavelength range can be achieved, without adverse affect on system loss.