公开(公告)号：CA2255676A1

公开(公告)日：1998-01-08

申请号：CA2255676

申请日：1997-06-09

Applicant: CORNING INC

Inventor： TRUESDALE CARLTON M ,  BURKE GERALD E

IPC: G02B6/00 ,  C03B37/014 ,  C03C3/076 ,  C03C13/04 ,  C03B37/012 ,  C03B37/027

Abstract: The present invention is directed to a process for forming a preform suitable for consolidation to a glass blank for producing an optical waveguide fiber. The preform comprises a core portion and an inner cladding layer surrounding the core portion and contains SiO2 and TiO2. A portion of the TiO2 in the preform is in a crystalline form that is predominantly rutile. In addition to SiO2 and TiO2, the preform contains an additive compound that is preferentially sacrificed instead of TiO2 when the preform is consolidated. The process includes oxidizing Si and Ti containing compounds as well as a precursor of the additive compound to form SiO2, TiO2, and the additive compound. The preform containing these materials is then formed. In addition, the preform can be converted to a glass blank by consolidation of the preform.

公开(公告)号：CA2396335A1

公开(公告)日：2002-05-16

申请号：CA2396335

申请日：2001-10-09

Applicant: CORNING INC

Inventor： TRUESDALE CARLTON M ,  MURTAGH MICHAEL T ,  MINELLY JOHN D ,  WANG JI ,  QI GANG ,  KOHLI JEFFREY T ,  GOFORTH DOUGLAS E

IPC: C03C4/12 ,  C03C3/097 ,  C03C13/04 ,  H01S3/06 ,  H01S3/16 ,  H01S3/17 ,  H01S3/067

Abstract: An optically active phosphorus-silicate glass when pumped to directly excite Er ions provides gain in 1565nm to 1620nm range and comprises in weight percent: SiO2 50 to 92%; Er2O3 0.01 to 2%; P2O5 greater than 5%; and Al2O3 0 .0 to 0.3%.

公开(公告)号：BR9811102A

公开(公告)日：2000-07-18

申请号：BR9811102

申请日：1998-07-07

Applicant: CORNING INC

Inventor： EVANS ALAN FRANK ,  TRUESDALE CARLTON M

IPC: C03B37/027 ,  C03C13/04 ,  G02B6/036 ,  G02B6/22

Abstract: Suppression of stimulated Brillouin scattering (SBS) by broadening the energy spectrum of participating SBS photons and/or phonons is achieved in an optical fiber having a core with both radially nonuniform viscosity and CTE profiles provided by alternating layers of glass modifying dopants such as phosphorous and fluorine. The nonuniform thermal expansion and viscosity profiles impart a residual, permanent, nonuniform stress in the fiber. The SBS suppressing effect provided by the nonuniform stress can be controlled and enhanced by applying a uniform or nonuniform tensile force to the fiber as it is being drawn. A preform for the fiber is also disclosed.

公开(公告)号：BR9706565A

公开(公告)日：1999-09-14

申请号：BR9706565

申请日：1997-06-25

Applicant: CORNING INC

Inventor： HOAGLIN CHRISTINE L ,  TRUESDALE CARLTON M

IPC: G02B6/00 ,  C03B37/014 ,  C03C13/04 ,  G02B6/02 ,  G02B6/028 ,  G02B1/00

Abstract: Optical waveguide core compositions comprising a core containing two dopants in a silica based glass, wherein one of the dopants is titania. The core composition serves to suppress the presence of Ti-3 and to preserve refractive index profile shape throughout the preform manufacturing process.

公开(公告)号：AU8386298A

公开(公告)日：1999-02-10

申请号：AU8386298

申请日：1998-07-07

Applicant: CORNING INC

Inventor： EVANS ALAN F ,  TRUESDALE CARLTON M

IPC: C03B37/027 ,  C03C13/04 ,  G02B6/036 ,  G02B6/22

Abstract: Suppression of stimulated Brillouin scattering (SBS) by broadening the energy spectrum of participating SBS photons and/or phonons is achieved in an optical fiber having a core with both radially nonuniform viscosity and CTE profiles provided by alternating layers of glass modifying dopants such as phosphorous and fluorine. The nonuniform thermal expansion and viscosity profiles impart a residual, permanent, nonuniform stress in the fiber. The SBS suppressing effect provided by the nonuniform stress can be controlled and enhanced by applying a uniform or nonuniform tensile force to the fiber as it is being drawn. A preform for the fiber is also disclosed.

公开(公告)号：AU698054B2

公开(公告)日：1998-10-22

申请号：AU6965196

申请日：1996-09-04

Applicant: CORNING INC

Inventor： BURKE GERALD E ,  TRUESDALE CARLTON M

IPC: C03B19/14 ,  C03C1/02 ,  C03C3/06 ,  C03B20/00

公开(公告)号：CA2238979A1

公开(公告)日：1998-06-25

申请号：CA2238979

申请日：1997-12-04

Applicant: CORNING INC

Inventor： BLACKWELL JEFFERY L ,  TIETZ LISA A ,  TRUESDALE CARLTON M

IPC: C03B37/018 ,  C03C13/04

Abstract: The present invention is directed to a silica forming feedstock and a method of making optical wageguides and optical waveguide preforms. The feedstock for use in the manufacturing of germanium doped silica glass products includes a siloxane and a germanium dopant component such as germanium alkoxide. The invention further relates to the manufacturing of optical waveguides and optical waveguide preforms using a fluid feedstock which includes a siloxane and germanium dopant component preferably germanium alkoxide.

公开(公告)号：CA2230976A1

公开(公告)日：1997-03-13

申请号：CA2230976

申请日：1996-09-04

Applicant: CORNING INC

Inventor： BURKE GERALD E ,  TRUESDALE CARLTON M

IPC: C03B19/14 ,  C03C1/02 ,  C03C3/06 ,  C03B20/00

Abstract: A method is disclosed for forming a GeO2-doped SiO2 glass article by depositing glass particles to form a porous preform and then drying and sintering the porous preform. A precursor of SnO2 is also present in the reactant stream used to form the particles, whereby the reaction produces particles of glass that contain GeO2, SiO2 and SnO2. The presence of SnO2 in the particles reduces the reaction of GeO2 with chlorine to form GeCl4 during the drying step. The GeC14 that would have formed would have either escaped from the porous preform or caused GeO2 to be re-deposited in an undesirable portion of the preform. The retention of GeO2 in the article is therefore enhanced.

公开(公告)号：AU7876500A

公开(公告)日：2001-06-06

申请号：AU7876500

申请日：2000-10-10

Applicant: CORNING INC

Inventor： HARSHBARGER DOUGLAS E ,  NOLAN DANIEL A ,  THOMAS LEO C ,  TRUESDALE CARLTON M

IPC: G02B6/122 ,  G02B6/26 ,  G02B6/42 ,  G02B6/14

公开(公告)号：CA2388997A1

公开(公告)日：2001-05-17

申请号：CA2388997

申请日：2000-10-10

Applicant: CORNING INC

Inventor： TRUESDALE CARLTON M ,  THOMAS LEO C ,  HARSHBARGER DOUGLAS E ,  NOLAN DANIEL A

IPC: G02B6/122 ,  G02B6/26 ,  G02B6/42 ,  G02B6/14

Abstract: A single mode waveguide coupling to a multimode fiber (14) of a high-bandwid th local optical network is made by a tapered coupler (10) that expands the spo t size of the propagating beam to fill additional modes of the multimode fiber . The tapered coupler has a core (30) surrounded by inner (32) and outer (34) layers of cladding. The core and the inner cladding layer are drawn down alo ng their length to force light from the core into the surrounding inner claddin g layer. The outer cladding layer confines the expanded beam within the core a nd inner cladding layer.