公开(公告)号：ID25498A

公开(公告)日：2000-10-05

申请号：ID20001015

申请日：1998-10-06

Applicant: CORNING INC

Inventor： LIU YANMING ,  BERKEY GEORGE E

IPC: G02B6/036 ,  G02B6/02 ,  G02B6/16 ,  G02B6/22

Abstract: Disclosed is a single mode optical waveguide fiber having a segmented core design. The core may have two or more segments. The highest refractive index portion of the core is spaced apart from the centerline of the waveguide fiber. The relative index of the first or center segment of the core is negative, where the reference refractive index is taken to be the minimum index clad. This family of core profiles provides effective areas in the range of 110 mum2 to 150 mum2 in the operating window around 1550 nm.

公开(公告)号：AU3582200A

公开(公告)日：2000-08-07

申请号：AU3582200

申请日：2000-01-18

Applicant: CORNING INC

Inventor： BERKEY GEORGE E ,  DONG LIANG

IPC: G02B6/00 ,  G02B6/02 ,  G02B6/34 ,  H01S3/06 ,  H01S3/067 ,  H01S3/08 ,  H01S3/10

Abstract: Disclosed is a fiber optic filter that includes a central core, a ring core concentric with the central core, an inner cladding region of refractive index ni between the central and ring cores, and a cladding layer of refractive index n, surrounding the ring core. The maximum refractive index n, of the central core and the maximum refractive index n2 of the ring core are greater than nc and ni. The propagation constants of one core mode and one ring mode are different at wavelengths except for at least one wavelength lambd0 whereby power transfers between the two cores at lambd0. At least a portion of the fiber optic filter fiber is wound around a reel to subject it to a continuous curvature, the radius of which determines the amplitude of the attenuation. Such fibers are useful in fiber amplifiers in which the central core contains active dopant ions.

公开(公告)号：CA2360933A1

公开(公告)日：2000-07-27

申请号：CA2360933

申请日：2000-01-18

Applicant: CORNING INC

Inventor： DONG LIANG ,  BERKEY GEORGE E

IPC: G02B6/00 ,  G02B6/02 ,  G02B6/34 ,  H01S3/06 ,  H01S3/067 ,  H01S3/08 ,  H01S3/10 ,  G02F1/25 ,  H04B10/17 ,  G02B5/20 ,  G02B6/22

Abstract: Disclosed is a fiber optic filter that includes a central core (19), a ring core (20) concentric with the central core (19), an inner cladding region (2 1) of refractive index ni, and a cladding layer (22) of refractive index nc surrounding the ring core (20). The maximum refractive index n1 of the centr al core (19) and the maximum refractive index n2 of the ring core (20), are greater than nc and n1. At least at one wavelengths, power transfers between the two cores at (19 and 20). At least a portion of the filter (10) is wound around a reel (18) which determines the attenuation.

公开(公告)号：CA2335131A1

公开(公告)日：2000-01-06

申请号：CA2335131

申请日：1999-06-25

Applicant: CORNING INC

Inventor： NOLAN DANIEL A ,  BERKEY GEORGE E

IPC: G02B6/00 ,  G02B6/02 ,  G02B6/036 ,  G02B6/14 ,  G02B6/287 ,  G02B6/293 ,  G02B6/34 ,  G02B6/26

Abstract: The present invention provides environmentally stable interferometric and lattice devices that exhibit low excess loss and polarization dependent loss . The modal noise at the splices between the device pigtails and the system fiber is minimized or eliminated. The present invention is an optical device (10) for filtering a light signal. The optical device (10) has a tunable spectral response. The optical device includes a first optical fiber (25) having a first core region (30) and a cladding (34) with refractive index n2 . The first core region (30) includes a core (32) having refractive index n1 a nd a first fiber coupling regulator (300) integral with the first optical fiber (25). The first fiber coupling regulator (300) couples the light signal between a first optical path and second optical path and substantially prevents the light signals from coupling into a third optical path.

公开(公告)号：CA2174055A1

公开(公告)日：1996-10-14

申请号：CA2174055

申请日：1996-04-12

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: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  C03B37/02 ,  C03B37/027 ,  G02B6/02 ,  G02B6/028 ,  G02B6/036 ,  G02B6/18

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：CA2006345A1

公开(公告)日：1991-04-16

申请号：CA2006345

申请日：1989-12-21

Applicant: CORNING INC

Inventor： BERKEY GEORGE E

IPC: G02B6/255 ,  C03C15/00 ,  C03C25/68 ,  G02B6/28 ,  G02B6/36 ,  G02B6/38

Abstract: A method of forming a tapered aperture at the end of a capillary tube bore. A gaseous etchant such as a fluorine-containing compound flows through the bore and emanates from the first end of the tube. That tube end is heated to create a longitudinal temperature gradient. The gaseous etchant reacts with the tube and enlarges that portion of the bore at the first end. The resultant tapered aperture has a surface smoothness and shape that greatly facilitates the insertion of optical fibers during the fabrication of optical energy transfer devices.

公开(公告)号：AU2003284095A8

公开(公告)日：2004-05-04

申请号：AU2003284095

申请日：2003-10-10

Applicant: CORNING INC

Inventor： LI MING-JUN ,  BERKEY GEORGE E ,  NOLAN DANIEL A

IPC: G02B6/02 ,  H04B10/18 ,  G02B6/16

公开(公告)号：AU2003299138A1

公开(公告)日：2004-04-23

申请号：AU2003299138

申请日：2003-09-22

Applicant: CORNING INC

Inventor： KOHLI JEFFREY T ,  POWERS DALE R ,  BERKEY GEORGE E ,  BOOKBINDER DANA C ,  FIACCO RICHARD M

IPC: C03B37/014

Abstract: A method of forming an optical fiber preform that includes providing a consolidated glass preform, depositing a layer of silica soot onto the consolidated glass preform to form a composite preform having a consolidated glass portion and a silica soot portion, and exposing the composite preform to an atmosphere containing a concentration of a deuterium compound for a time and at a temperature sufficient to cause the deuterium compound to penetrate the consolidated glass portion without pervading the entire glass portion. Preferably, the deuterium compound penetrates the glass portion to a desired depth.

公开(公告)号：AU2003213276A1

公开(公告)日：2003-09-09

申请号：AU2003213276

申请日：2003-02-26

Applicant: CORNING INC

Inventor： BERKEY GEORGE E ,  LIU YANMING ,  LOVE WALTER F ,  MA DAIPING

IPC: G02B6/02 ,  G02B6/028

公开(公告)号：AU733718C

公开(公告)日：2003-03-20

申请号：AU3203697

申请日：1997-04-21

Applicant: CORNING INC

Inventor： BERKEY GEORGE E

IPC: G02B6/028 ,  C03B37/012 ,  C03B37/018 ,  C03B37/027 ,  G02B6/18 ,  G02B6/22

Abstract: A preform (94) for making an optical fiber is made by depositing silica soot (91) around a tube (90). Pieces of differing glass compositions (81, 82) are placed in the bore of the tube. This preform is then sintered, fused and collapsed. A draw blank is obtained which can be drawn into a low-loss, dispersion managed, single-mode optical fiber.