公开(公告)号：BR0010173A

公开(公告)日：2002-01-15

申请号：BR0010173

申请日：2000-04-24

Applicant: CORNING INC

Inventor： BERKEY GEORGE EDWARD ,  POWERS DALE ROBERT ,  SRIKANT V ,  JIANG LEI

IPC: C03B37/014 ,  C03B37/018 ,  G02B6/00 ,  G02B6/036 ,  G02B6/16

Abstract: Disclosed is a dispersion compensating optical fiber that includes a core surrounded by a cladding layer of refractive index nCL. The core includes at least three radially adjacent regions, a central core region, a moat region having a refractive index nM that is sufficiently lower than nCL such that DELTAM

公开(公告)号：CA2410809A1

公开(公告)日：2001-12-06

申请号：CA2410809

申请日：2001-05-30

Applicant: CORNING INC

Inventor： STONE JEFFERY S ,  MISHRA SNIGDHARAJ K ,  SRIKANT V ,  KUMAR SHIVA ,  CAIN MICHAEL B ,  BICKHAM SCOTT R

IPC: G02B6/02 ,  G02B6/036 ,  G02B6/16 ,  H04B10/18

Abstract: Disclosed are refractive index profiles for total dispersion compensating optical waveguide fibers for use in high data rate, long length telecommunications systems. The optical waveguide fibers in accord with the invention provide substantially equal compensation of total dispersion over a range of wavelengths, thus facilitating wavelength division multiplexed systems. Also disclosed are spans of optical waveguide fiber that include a length of transmission fiber together with a length of the compensating fibe r. The spans are joined end to end in series arrangement to form the optical waveguide fiber part of a telecommunication system.

公开(公告)号：AU7784201A

公开(公告)日：2001-11-12

申请号：AU7784201

申请日：2001-04-17

Applicant: CORNING INC

Inventor： BROWN JOHN T ,  BURKE GERALD E ,  CHACON LISA C ,  DAWES STEVEN B ,  ELLISON ADAM J ,  HAWTOF DANIEL W ,  LUPPINO ANTHONY P ,  SRIKANT V ,  TANDON PUSHKAR ,  TENNENT CHRISTINE L ,  TERRELL JAMES P JR ,  WHALEN JOSEPH M

IPC: C03B37/018 ,  C03B19/14 ,  C03B37/012 ,  C03B37/014 ,  C03C3/06 ,  F23D14/22 ,  F23D14/32 ,  G03F1/00 ,  G03F7/20

Abstract: Methods, apparatus and precursors for producing substantially water-free silica soot, preforms and glass. The methods and apparatus make substantially water-free fused silica preforms or glass by removing water as a reaction product, removing water from the atmosphere, removing water from the transport process, or combinations thereof. In a first embodiment, substantially water-free soot, preforms or glass are achieved by using a hydrogen-free fuel, such as carbon monoxide, in the deposition process. In another embodiment, a soot producing burner has parameters that enable operation on a substantially hydrogen-free fuel. End burners, which minimize water production, are also described. Such water-free methods are useful in depositing fluorine-doped soot because of the low water present and the efficiency in which fluorine is incorporated. In another embodiment, glassy barrier layer methods and apparatus are described for minimizing dopant migration, especially fluorine. Laser and induction methods and apparatus for forming the barrier layer are depicted. A chlorine, fluorine and silica precursor, such as chlorofluorosilane, may be utilized to form fluorinated soot. Other methods and apparatus are directed to combinations of conventional and substantially water-free processes. One embodiment is directed to combustion enhancing additives for addition to the substantially hydrogen-free fuels. The methods and apparatus in accordance with the invention are particularly useful for producing photomask substrates and optical fiber preforms.

公开(公告)号：AU2958400A

公开(公告)日：2000-06-19

申请号：AU2958400

申请日：1999-11-10

Applicant: CORNING INC

Inventor： BERKEY GEORGE E ,  EVANS ALAN F ,  SRIKANT V

IPC: G02B6/02 ,  G02B6/036 ,  G02B6/34 ,  G02B6/16

Abstract: A pulse-reshaping optical fiber having a core with refractive index nc surrounded by a cladding layer, the diameter of the core changing monotonically along the length of the fiber. The core includes a central region having a maximum refractive index n1 and a moat region disposed radially adjacent to the central region. The moat region has a minimum refractive index n2 which is sufficiently low that the index delta DELTA2 of the moat region with respect to nc is not greater than -0.1%. The moat region affects the change in dispersion with respect to fiber cladding diameter, as well as providing the pulse-reshaping fiber with low dispersion versus wavelength slope. The pulse-reshaping fiber is particularly useful in association with optical transmission systems where high transmission rates and narrow pulse widths are desired, including components such as high pulse rate wavelength-division-multiplexers (WDMs) and optical regenerators.

公开(公告)号：CA2410809C

公开(公告)日：2009-05-19

申请号：CA2410809

申请日：2001-05-30

Applicant: CORNING INC

Inventor： MISHRA SNIGDHARAJ K ,  KUMAR SHIVA ,  CAIN MICHAEL B ,  BICKHAM SCOTT R ,  SRIKANT V ,  STONE JEFFERY S

IPC: G02B6/02 ,  H04B10/18 ,  G02B6/036

Abstract: Disclosed are refractive index profiles for total dispersion compensating optical waveguide fibers for use in high data rate, long length telecommunications systems. The optical waveguide fibers in accord with the invention provide substantially equal compensation of total dispersion over a range of wavelengths, thus facilitating wavelength division multiplexed systems. Also disclosed are spans of optical waveguide fiber that include a length of transmission fiber together with a length of the compensating fibe r. The spans are joined end to end in series arrangement to form the optical waveguide fiber part of a telecommunication system.

公开(公告)号：DE60137119D1

公开(公告)日：2009-02-05

申请号：DE60137119

申请日：2001-02-21

Applicant: CORNING INC

Inventor： BERKEY GEORGE E ,  BICKHAM SCOTT R ,  CAIN MICHAEL B ,  HAJCAK PAMELA A ,  MANYAM UPENDRA H ,  MISHRA SNIGDHARAJ K ,  SRIKANT V

IPC: G02B6/02 ,  G02B6/036 ,  H04B10/02 ,  H04B10/18 ,  H04B10/43

Abstract: Disclosed is a dispersion compensating and dispersion slope compensating single mode optical waveguide fiber. The refractive index profiles of waveguide fibers in accord with the invention are disclosed and described. These index profiles provide a waveguide fiber having negative total dispersion and negative total dispersion slope so that a standard waveguide fiber is compensated over an extended wavelength range. A telecommunications link using the fiber in accord with the invention is also disclosed and described. A standard fiber to compensating fiber length ratio in the range of 1:1 to 3:1 is shown to give optimum link performance with respect to limiting non-linear dispersion effects.

公开(公告)号：AU2002355526A1

公开(公告)日：2003-02-24

申请号：AU2002355526

申请日：2002-07-22

Applicant: CORNING INC

Inventor： SRIKANT V ,  WILLIAMS MARTIN R

IPC: H01S3/067 ,  H01S3/10 ,  H01S3/30 ,  H01S3/00

Abstract: An optical amplifier site comprising: (i) a distributed Raman amplifier providing a first signal gain level; (ii) an optical amplifier located downstream from the distributed Raman amplifier, the optical amplifier being indirectly coupled to the distributed Raman amplifier, the optical amplifier including a first amplification medium, providing a second signal gain level; (iii) at least one optical signal loss element located between the distributed Raman amplifier and the optical amplifier and, contributing at least 0.5 dB optical loss to the amplifier site; (iv) a second amplification medium located down-stream from the first amplification medium; and (v) at least another one optical signal loss element, this at least another one optical signal loss element being located between said first amplification medium and said second amplification medium.

公开(公告)号：AU2002251846A1

公开(公告)日：2002-10-15

申请号：AU2002251846

申请日：2002-01-31

Applicant: CORNING INC

Inventor： TEN SERGEY Y ,  CONRADI JAN ,  SRIKANT V

IPC: G02B6/02 ,  H04B10/02 ,  H04B10/12 ,  H04B10/135 ,  H04B10/14 ,  H04B10/18 ,  H04B10/2581

公开(公告)号：AU6971801A

公开(公告)日：2001-12-11

申请号：AU6971801

申请日：2001-05-30

Applicant: CORNING INC

Inventor： BICKHAM SCOTT R ,  CAIN MICHAEL B ,  KUMAR SHIVA ,  MISHRA SNIGDHARAJ K ,  SRIKANT V ,  STONE JEFFERY S

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

Abstract: Disclosed are refractive index profiles for total dispersion compensating optical waveguide fibers for use in high data rate, long length telecommunications systems. The optical waveguide fibers in accord with the invention provide substantially equal compensation of total dispersion over a range of wavelengths, thus facilitating wavelength division multiplexed systems. Also disclosed are spans of optical waveguide fiber that include a length of transmission fiber together with a length of the compensating fiber. The spans are joined end to end in series arrangement to form the optical waveguide fiber part of a telecommunication system.

公开(公告)号：AU6302701A

公开(公告)日：2001-12-11

申请号：AU6302701

申请日：2001-05-10

Applicant: CORNING INC

Inventor： SRIKANT V

IPC: G02B6/036 ,  G02B6/34 ,  G02B6/00

Abstract: Dispersion managed fibers which preferably have a central core region, a moat region, and a ring region are provided. The central core region preferably has an alpha profile with an alpha value preferably less than about 2.3. The moat region preferably includes four sub-regions, namely, a first sub-region (11) in which the index of refraction decreases, a second sub-region (12) in which the index of refraction increases substantially linearly, a fourth sub-region (14) in which the index of refraction again increases substantially linearly, and a third sub-region (13) which serves as a transition region which smoothly connects the third and fourth substantially linear sub-regions. The dispersion managed fibers preferably have the following properties: (a) they exhibit reduced sensitivity to manufacturing variabilities, (b) they have relatively small changes in mode field diameter at the junctions between fiber sections having positive dispersions and fiber sections having negative dispersions, and/or (c) they can be readily manufactured using the tablet method.