公开(公告)号：AU2003219941A1

公开(公告)日：2003-09-22

申请号：AU2003219941

申请日：2003-02-27

Applicant: CORNING INC

Inventor： HIMMELREICH JOHN ,  SHASHIDHAR NAGARAJA ,  BHAGAVATULA VENKATA A

IPC: G02B6/02 ,  G02B6/255 ,  G02B6/26 ,  G02B6/30 ,  G02B6/32 ,  G02B6/42 ,  H01S5/022

Abstract: An apparatus for altering the mode field of an optical signal is disclosed. The apparatus includes a GRIN-fiber lens and a reflective surface disposed at one end of the GRIN-fiber lens, the reflective surface configured to cooperate with the GRIN-fiber lens to redirect the path of the optical signal directed against the reflective surface. A method of manufacturing an apparatus for altering the mode field of an optical signal and an optical assembly are also disclosed.

公开(公告)号：AU2002356179A1

公开(公告)日：2003-03-10

申请号：AU2002356179

申请日：2002-07-18

Applicant: CORNING INC

Inventor： SRIKANT V ,  BHAGAVATULA VENKATA A ,  RAHMAN LUTFUR ,  BERKEY GEORGE E

IPC: C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  G02B6/036

公开(公告)号：AU754688B2

公开(公告)日：2002-11-21

申请号：AU3769299

申请日：1999-04-28

Applicant: CORNING INC

Inventor： BERKEY GEORGE E ,  BHAGAVATULA VENKATA A

IPC: G02B6/00 ,  C03B23/20 ,  C03B37/012 ,  G02B6/02 ,  C03B37/027

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：DK0737873T3

公开(公告)日：2002-10-21

申请号：DK96105573

申请日：1996-04-09

Applicant: CORNING INC

Inventor： BERKEY GEORGE E ,  JONES PETER C ,  LIU YANMING ,  MODAVIS ROBERT A ,  NEWHOUSE MARK A ,  BHAGAVATULA VENKATA A ,  KECK DONALD B ,  MORROW ALAN J ,  NOLAN DANIEL A

IPC: C03B37/012 ,  G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  C03B37/02 ,  C03B37/027 ,  G02B6/02 ,  G02B6/028 ,  G02B6/036 ,  G02B6/16

Abstract: A single-mode optical waveguide fiber designed to limit power penalty due to four wave mixing and a method of making the waveguide is disclosed. Variations in properties, e.g., radius or refractive index, of the waveguide fiber core provide a total dispersion which varies along the length of the waveguide. The algebraic sum of products of length times total dispersion is controlled to a pre-selected value for each waveguide fiber which makes up a system link. Proper choice of total dispersion variation magnitude and sub-length results in a system link wherein a signal travels only short distances in waveguide portions having total dispersion near zero. However, the variation of the total dispersion provides a system link which has a pre-selected dispersive effect on the signal over a selected wavelength range. The dispersive effect on the signal can be chosen to be essentially zero. A number of techniques for fabricating DM fiber are also disclosed.

公开(公告)号：DE69621974D1

公开(公告)日：2002-08-01

申请号：DE69621974

申请日：1996-04-09

Applicant: CORNING INC

Inventor： BERKEY GEORGE E ,  BHAGAVATULA VENKATA A ,  JONES PETER C ,  KECK DONALD B ,  LIU YANMING ,  MODAVIS ROBERT A ,  MORROW ALAN J ,  NEWHOUSE MARK A ,  NOLAN DANIEL A

IPC: C03B37/012 ,  G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  C03B37/02 ,  C03B37/027 ,  G02B6/02 ,  G02B6/028 ,  G02B6/036 ,  G02B6/16

Abstract: A single-mode optical waveguide fiber designed to limit power penalty due to four wave mixing and a method of making the waveguide is disclosed. Variations in properties, e.g., radius or refractive index, of the waveguide fiber core provide a total dispersion which varies along the length of the waveguide. The algebraic sum of products of length times total dispersion is controlled to a pre-selected value for each waveguide fiber which makes up a system link. Proper choice of total dispersion variation magnitude and sub-length results in a system link wherein a signal travels only short distances in waveguide portions having total dispersion near zero. However, the variation of the total dispersion provides a system link which has a pre-selected dispersive effect on the signal over a selected wavelength range. The dispersive effect on the signal can be chosen to be essentially zero. A number of techniques for fabricating DM fiber are also disclosed.

公开(公告)号：BR9809583A

公开(公告)日：2000-07-04

申请号：BR9809583

申请日：1998-04-14

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA A ,  CHOWDHURY DIPAKIN Q

IPC: G02B6/02 ,  G02B6/34 ,  G02B6/00

Abstract: Disclosed is a dispersion managed optical waveguide fiber. The power loss due to four wave mixing is kept low by making the waveguide from sub-lengths of fiber which have non-zero dispersion. The sign of the total dispersion of the sub-lengths is made to alternate along the length of the waveguide, thereby allowing the total dispersion of the waveguide to be managed to a pre-selected target value. It has been discovered that the best performance is obtained when the zero dispersion wavelengths of the sub-lengths are widely and asymmetrically separated. Advantages are realized when the core refractive index profile is changed for sub-lengths having total dispersion of different sign.

公开(公告)号：AU715043B2

公开(公告)日：2000-01-13

申请号：AU7442496

申请日：1996-08-08

Applicant: CORNING INC

Inventor： ANTOS ALFRED J ,  BHAGAVATULA VENKATA A ,  CHERVENAK WILLIAM J ,  CHOWDHURY DIPAKBIN Q ,  NOLAN DANIEL A

IPC: G02B6/024 ,  C03B37/012 ,  C03B37/014 ,  G02B6/02 ,  G02B6/028 ,  G02B6/10 ,  G02B6/00 ,  C03B37/023

Abstract: A single mode optical waveguide having reduced polarization mode dispersion and a method for making such a waveguide is disclosed. Perturbations are introduced into the waveguide core to couple power between the two polarization modes. A model calculation shows that the perturbation length may be of the order of the correlation length. The inventive waveguide is robust in that polarization mode dispersion is reduced even if perturbations are impressed on the fiber after manufacture.

公开(公告)号：AU4307199A

公开(公告)日：1999-11-23

申请号：AU4307199

申请日：1999-04-14

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA A ,  EVANS ALAN F

IPC: G02B6/02 ,  G02B6/34 ,  H01S3/06 ,  H01S3/10 ,  H04B10/02 ,  H04B10/18 ,  G02B6/16

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：CA2330627A1

公开(公告)日：1999-11-11

申请号：CA2330627

申请日：1999-04-14

Applicant: CORNING INC

Inventor： EVANS ALAN F ,  BHAGAVATULA VENKATA A

IPC: G02B6/02 ,  G02B6/34 ,  H01S3/06 ,  H01S3/10 ,  H04B10/02 ,  H04B10/18 ,  G02B6/16

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：CA2212527A1

公开(公告)日：1997-08-23

申请号：CA2212527

申请日：1997-02-11

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA A

IPC: G02B6/293 ,  G02B6/12 ,  G02B6/34 ,  G02B27/14 ,  G02F1/21 ,  H04B10/27 ,  H04B10/29 ,  H04B10/67 ,  H04J14/00 ,  H04J14/02

Abstract: Optical signals are dispersed according to their wavelength by an optical path length difference generator that couples a single pathway conveying a plurality of different wavelength signals to multiple pathways separately conveying the different wavelength signals. The optical path length generator can be formed by a reflective stack having a plurality of partially reflective surfaces for reflecting successive portions of the energy of each of the different wavelength signals along different length optical paths.