Dispersion slope compensating optical fiber

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.

DISPERSION SLOPE COMPENSATING OPTICAL FIBER

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. © KIPO & WIPO 2007 ...

AN APPARATUS AND METHOD OF DOPING SILICA WITH FLUORINE DURING LAYDOWN

A method for doping silica soot with fluorine during laydown, including providing a bait rod (13), and providing a burner (12), wherein the burner (12) emits a reactant flame. The method also including providing at least one first gas-feed (14) separate from the burner (12), wherein the gas-feed (14) supplies a first jet of fluorine-based gases, and depositing a layer of silica soot on the bait rod (13) by vaporizing a silica producing gas within the reactant flame of the burner. The method further including supplying the first jet of fluorine-based gases to the silica soot deposited on to the bait rod (13) via the first gas-feed (14) subsequent to vaporizing at least a portion of the silica producing gas within the reactant flame of the burner. © KIPO & WIPO 2007 ...

DISPERSION SLOPE COMPENSATING OPTICAL FASER

Disclosed is a dispersion compensating optical fiber that includes a core surrounded by a cladding layer of refractive index Δc. The core includes at least three radially adjacent regions, a central core region having Δ1, a moat region having a refractive index Δ2 and an annular ring region having a refractive index Δ3, such that Δ1 > Δ3 > Δc > Δ2. The fiber exhibits a dispersion slope which is less than -1.0 ps/nm2/km over the wavelength range 1525 to 1565, a dispersion at 1550 which is less than -30 ps/nm/km, and a κ value obtained by dividing the dispersion value by the dispersion slope which is greater than 35 and preferably between 40 and 100. © KIPO & WIPO 2007 ...

LONG HAUL SINGLE MODE WAVEGUIDE

Disclosed is a single mode optical waveguide fiber having a segmented core. The relative indexes, the refractive index profiles and the radii of the segments are chosen to provide waveguide fiber properties advantageously used in severe environments, such as, undersea cables. The segmented core waveguide fiber has a negative total dispersion over the operating window of about 1530 nm to 1570 nm, which serves to eliminate soliton formation. The key properties of dispersion zero, cut off wavelength, attenuation, and bend resistance fall within desired ranges. The waveguide also features a low polarization mode dispersion. © KIPO & WIPO 2007 ...

Dispersion compensating optical fiber

Disclosed is a dispersion compensating optical fiber that includes a core surrounded by a cladding layer of refractive index DELTAc. The core includes at least three radially adjacent regions, a central core region having DELTA1, a moat region having a refractive index DELTA2 and an annular ring region having a refractive index DELTA3, such that DELTA1>DELTA3>DELTAc>DELTA2. The fiber exhibits a dispersion at 1550 which is less than -30 ps/nm/km, and a kappa value obtained by dividing the dispersion value by the dispersion slope which is between 40 and 100.

Apparatus and method of doping silica with fluorine during laydown

A method for doping silica soot with fluorine during laydown, including providing a bait rod, and providing a burner, wherein the burner emits a reactant flame. The method also including providing at least one first gas-feed separate from the burner, wherein the gas-feed supplies a first jet of fluorine-based gases, and depositing a layer of silica soot on the bait rod by vaporizing a silica producing gas within the reactant flame of the burner. The method further including supplying the first jet of fluorine-based gases to the silica soot deposited on to the bait rod via the first gas-feed subsequent to vaporizing at least a portion of the silica producing gas within the reactant flame of the burner.

Dispersion compensating optical fiber

Disclosed is a dispersion compensating optical fiber that includes a core surrounded by a cladding layer of refractive index Δ c . The core includes at least three radially adjacent regions, a central core region having Δ1, a moat region having a refractive index Δ2 and an annular ring region having a refractive index Δ3, such that Δ1>Δ3>Δc>Δ2. The fiber exhibits a dispersion slope which is less than −1.0 ps/nm 2 /km over the wavelength range 1525 to 1565, a dispersion at 1550 which is less than −30 ps/mn/km, and a κ value obtained by dividing the dispersion value by the dispersion slope which is greater than 35 and preferably between 40 and 100.

Dispersion compensating optical fiber

Disclosed is a dispersion compensating optical fiber that includes a refractive index profile selected to provide dispersion at 1550 nm of between -90 and -150 ps/nm/km; dispersion slope at 1550 nm of less than -1.5 ps/nm<2>/km; and kappa of between 40 and 95. The profile preferably has a core surrounded by a cladding layer of refractive index Deltac, and at least three radially adjacent regions including a central core region having Delta1, a moat region having a refractive index Delta2, and an annular ring region having a refractive index Delta3, wherein Delta1>Delta3>Deltac>Delta2.

Long haul single mode waveguide

Dispersion slope compensating optical fiber