公开(公告)号：AU751971B2

公开(公告)日：2002-09-05

申请号：AU1620899

申请日：1998-12-03

Applicant: CORNING INC

Inventor： HAWTOF DANIEL W

IPC: F23D14/14 ,  C01B13/20 ,  C01B33/18 ,  C03B8/04 ,  C03B19/14 ,  C03B37/014 ,  F23D14/56 ,  F23D14/58 ,  F23D99/00 ,  H04R29/00 ,  C03B37/018

Abstract: A burner and a method for producing an inorganic soot such as silica comprising a plurality of substantially planar layers having multiple openings therethrough formed by a micromachining process. The openings are in fluid communication with a precursor inlet and a gas inlet to permit the gas and the precursor to flow through and exit the burner. The burner produces a flame from a combustible gas in which the precursor undergoes a chemical reaction to form the soot.

公开(公告)号：MXPA01010871A

公开(公告)日：2002-05-06

申请号：MXPA01010871

申请日：2000-04-07

Applicant: CORNING INC

Inventor： HAWTOF DANIEL W

IPC: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03C13/04 ,  G02B6/02 ,  C03B37/018 ,  G02B6/16

Abstract: Se describe un cuerpo de vidrio cilindrico que tiene una region de linea central de bajo contenido de agua y un metodo para fabricar dicho cuerpo de vidrio cilindrico para uso en la fabricacion de fibra de guia de onda optica; la region de linea central del cuerpo de vidrio cilindrico, tiene un contenido de agua suficientemente bajo de modo que una fibra de guia de onda optica hecha a partir del cuerpo de vidrio cilindrico de la presente invencion presente una atenuacion optica de menos de aproximadamente 0.35 dB/km, y preferiblemente inferior a aproximadamente 0.31 dB/km en una longitud de onda medida de 1380 nm; tambien se describe un obturador de bajo contenido de agua utilizada en la fabricacion de dicho cuerpo de cilindrico, una fibra de gula de onda optica que tiene un pico bajo de agua un sistema de comunicacion con fibra optica que incorpora dicha fibra de onda optica.

公开(公告)号：AU1585301A

公开(公告)日：2001-07-09

申请号：AU1585301

申请日：2000-11-03

Applicant: CORNING INC

Inventor： BOOKBINDER DANA C ,  HAWTOF DANIEL W ,  POWERS DALE R

IPC: C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  C03B32/00

公开(公告)号：AU1340701A

公开(公告)日：2001-06-25

申请号：AU1340701

申请日：2000-10-23

Applicant: CORNING INC

Inventor： CHU POLLY W ,  ELLISON ADAM J G ,  GOFORTH DOUGLAS E ,  HAWTOF DANIEL W ,  WHALEN JOSEPH M

IPC: G02B6/00 ,  C03C3/095 ,  C03C13/04 ,  H01S3/06 ,  H01S3/067 ,  H01S3/10 ,  H01S3/16 ,  H01S3/17

Abstract: Disclosed are optical gain fibers which include an erbium-containing core and a cladding surrounding the core and which have ripple of less than about 25% over about a 40 nm wide window or ripple of less than about 15% over about a 32 nm wide window, or both. In one embodiment, the optical gain fibers are pumpable at 980 nm and at 1480 nm. In another embodiment, the optical gain fibers are fusion sliceable. In yet another embodiment, the core includes oxides erbium; the cladding includes silicon dioxide; and the optical gain fiber has a passive loss of less than about 0.5% of the peak absorption of the erbium absorption band in the vicinity of 1530 nm. The optical gain fibers of the present invention have a wider gain window, improved flatness across the gain window, and/or increased gain as compared to conventional optical gain fibers. Accordingly, they are useful in amplifying optical signals, particularly signals which need to be repeatedly amplified over the course of a long-haul transmission, without losses in the signal quality that are commonly encountered in conventional optical signal amplifying methods.

公开(公告)号：CA2394620A1

公开(公告)日：2001-06-21

申请号：CA2394620

申请日：2000-10-23

Applicant: CORNING INC

Inventor： GOFORTH DOUGLAS E ,  HAWTOF DANIEL W ,  ELLISON ADAM J G ,  WHALEN JOSEPH M ,  CHU POLLY W

IPC: G02B6/00 ,  C03C3/095 ,  C03C13/04 ,  H01S3/06 ,  H01S3/067 ,  H01S3/10 ,  H01S3/16 ,  H01S3/17 ,  G02B6/26

Abstract: Disclosed are optical gain fibers which include an erbium-containing core an d a cladding surrounding the core and which have ripple of less than about 25 % over about a 40 nm wide window or ripple of less than about 15 % over about a 32 nm wide window, or both. In one embodiment, the optical gain fibers are pumpable at 980 nm and at 1480 nm. In another embodiment, the optical gain fibers are fusion sliceable. In yet another embodiment, the core includes oxides erbium; the cladding includes silicon dioxide; and the optical gain fiber has a passive loss of less than about 0.5 % of the peak absorption of the erbium absorption band in the vicinity of 1530 nm. The optical gain fibe rs of the present invention have a wider gain window, improved flatness across the gain window, and/or increased gain as compared to conventional optical gain fibers. Accordingly, they are useful in amplifying optical signals, particularly signals which need to be repeatedly amplified over the course o f a long-haul transmission, without losses in the signal quality that are commonly encountered in conventional optical signal amplifying methods.

公开(公告)号：AU1327701A

公开(公告)日：2001-04-23

申请号：AU1327701

申请日：2000-09-15

Applicant: CORNING INC

Inventor： BHAGAVATULA VENKATA A ,  GIROUX CYNTHIA B ,  HAWTOF DANIEL W

IPC: G02B6/02 ,  G02B6/036 ,  H04B10/17 ,  H04B10/29 ,  G02B6/00

公开(公告)号：CA2382957A1

公开(公告)日：2001-04-19

申请号：CA2382957

申请日：2000-09-15

Applicant: CORNING INC

Inventor： HAWTOF DANIEL W ,  GIROUX CYNTHIA B ,  BHAGAVATULA VENKATA A

IPC: G02B6/02 ,  G02B6/036 ,  H04B10/17 ,  H04B10/29 ,  G02B6/10 ,  G02B6/16 ,  H04B10/20 ,  H04J14/02

Abstract: Single mode optical fiber waveguides with reduced bending losses for wavelength range of 1300 nm to 1700 nm are disclosed. The extended ranges ar e achieved by altering the optical characteristics of the fiber, namely, the M AC number, the mode field diameter ("MFD"), and the cut-off wavelength. The single mode fibers disclosed exhibit a lower MFD and higher cut-off wavelength. In addition, optical fiber transmission systems, wave division multiplexing ("WDM") systems, and optical fiber ribbon cables are disclosed that incorporate the single mode optical fiber. Figure 2 shows the refractiv e index profile as a function of the fiber radius. Figure 6 illustrates a ribb on cable (700) with 4 fibers in a matrix material (708). Each fiber consists of a central core (702), a cladding layer (703), a primary (704) and a secondary polymer layer (705) and a colored ink coating layer (706).

公开(公告)号：ID25479A

公开(公告)日：2000-10-05

申请号：ID20001389

申请日：1998-12-03

Applicant: CORNING INC

Inventor： HAWTOF DANIEL W

IPC: F23D14/14 ,  C01B13/20 ,  C01B33/18 ,  C03B8/04 ,  C03B19/14 ,  C03B37/014 ,  F23D14/56 ,  F23D14/58 ,  F23D99/00 ,  H04R29/00 ,  C03B37/018

Abstract: A burner and a method for producing an inorganic soot such as silica comprising a plurality of substantially planar layers having multiple openings therethrough formed by a micromachining process. The openings are in fluid communication with a precursor inlet and a gas inlet to permit the gas and the precursor to flow through and exit the burner. The burner produces a flame from a combustible gas in which the precursor undergoes a chemical reaction to form the soot.

公开(公告)号：CA2355678A1

公开(公告)日：2000-06-29

申请号：CA2355678

申请日：1999-11-30

Applicant: CORNING INC

Inventor： ALLAN DOUGLAS C ,  HAWTOF DANIEL W ,  BORRELLI NICHOLAS F ,  FAJARDO JAMES C ,  FIACCO RICHARD M ,  WEST JAMES A

IPC: G02B6/02 ,  C03B37/012 ,  C03B37/028 ,  C03C13/04 ,  G02B6/024 ,  G02B6/036 ,  G02B6/18

Abstract: Disclosed is an optical waveguide fiber preform which is an assembly of one or more core rods (14) surrounded by a plurality of clad rods (10). The clad ro ds (10) have a central portion (12) and a surrounding layer (22), in which the refractive index of the central portion is lower than that of the surroundin g layer. The preform is drawn into an optical waveguide fiber that has a two component clad layer. Proper choice of the central portion (12) and surrounding layer provide a waveguide fiber that is endlessly single mode. Alternative embodiments include fibers containing dopants that enhance fiber photosensitivity or which provide stress-induced or asymmetric-refractive- index-induced birefringence in the waveguide fiber.

公开(公告)号：CA2344806A1

公开(公告)日：2000-05-11

申请号：CA2344806

申请日：1999-10-18

Applicant: CORNING INC

Inventor： CAIN MICHAEL B ,  HAWTOF DANIEL W ,  SRIKANT VAIDYANATHAN

IPC: G02B6/00 ,  C03B19/14 ,  C03B37/014 ,  C03B37/018

Abstract: The present invention is directed to methods of producing soot used in the manufacture of optical waveguides. Both non-aqueous liquid reactants and aqueous solutions containing one or more salts are delivered through an atomizing burner assembly to form a homogenous soot stream containing the oxides of the selected elements contained within the non-aqueous liquid reactant and the aqueous solution. The resulting multi-component soot is collected by conventional methods to form preforms used in the manufacture o f optical waveguide fibers. Alternatively, an aqueous solution may be atomized with a gas at a first burner assembly to form an aerosol and a reactant vaporized for delivery to a second burner assembly. Preforms produced by the methods are also disclosed. The aqueous solution is preferably one comprisin g a metal salt, e.g. acetate, nitrate, sulfate, carbonate, chloride, hydroxide . The metal of the metal salt is preferably an alkali metal, an alkaline earth metal, lead, lanthanum, cobalt, antimony, erbium, aluminum, neodymium, praeseodymium.