| DRAKA COMTEQ B.V. Patent applications |
| Patent application number | Title | Published |
|---|
| 20120057833 | Optical-Fiber Module Having Improved Accessibility - The present invention relates to optical-fiber modules having improved accessibility. In a typical embodiment, the optical-fiber module includes one or more optical fibers surrounded by an intermediate layer. The intermediate layer typically includes a polymeric medium with a liquid lubricant dispersed therein. A buffer tube encloses the optical fibers and the intermediate layer. | 03-08-2012 |
| 20120040184 | Method of Fabricating an Optical Fiber Preform - A method of manufacturing an optical fiber preform includes preparing from a first deposition tube a first rod that includes a central core and preparing from a second deposition tube a second rod that includes a buried trench. The method further includes fitting the second rod as a sleeve over the first rod. This disclosed method facilitates the manufacture of large-capacity fiber preforms using deposition benches having small and/or medium deposition capacity. | 02-16-2012 |
| 20120040105 | Method and Apparatus Providing Increased UVLED Intensity and Uniform Curing of Optical-Fiber Coatings - A UVLED apparatus and a related method provide increased UVLED intensity to promote efficient curing of a coated glass fiber. The apparatus employs a plurality of UVLED sources, each UVLED source emitting an oscillating output of ultraviolet radiation. Typically, at least two of the UVLED sources have oscillating outputs of ultraviolet radiation that are out of phase with one another. During curing, an incompletely cured coating on a glass fiber absorbs electromagnetic radiation emitted from the UVLED sources. | 02-16-2012 |
| 20120039361 | DEPRESSED GRADED INDEX MULTI-MODE OPTICAL FIBER - A multi-mode optical waveguide fiber including a central core region having an outer radius surrounded by an inner cladding region having an outer radius, the inner cladding region having a lower index of refraction than the central core region, wherein both the central core and inner cladding regions are doped with fluorine, wherein the refractive index profile of the central core region is of the gradient index type and the central core region in the range of rε[0-r | 02-16-2012 |
| 20120036896 | Method of Manufacturing an Optical Fibre Preform - The present invention relates to a method for manufacturing a preform for optical fibres, wherein deposition of glass-forming compounds on the substrate takes place. The present invention furthermore relates to a method for manufacturing optical fibres, wherein one end of a solid preform is heated, after which an optical fibre is drawn from said heated end. | 02-16-2012 |
| 20120027367 | Optical Fiber Cable Having Raised Coupling Supports - Disclosed is an optical fiber cable that includes optical fibers and a deformable coupling element enclosed within a buffer tube. The coupling element is formed from a deformable yet substantially incompressible material and features a number of raised members projecting toward the optical fibers. The design of the coupling element layer permits coupling of the optical fibers to the buffer tube without the use of a compressive cushioning layer. This arrangement distributes the compressive force applied to discrete points along the outer perimeter of the optical fiber element. | 02-02-2012 |
| 20120027366 | Optical Fiber Cable Having A Deformable Coupling Element - Disclosed is an optical fiber cable that includes optical fibers and a deformable coupling element enclosed within a buffer tube. The coupling element is formed from a deformable yet substantially incompressible material that is capable of releasably and intermittently coupling the optical fibers to the buffer tube in various orientations. The design of the coupling element layer permits coupling of the optical fibers to the buffer tube without the use of a compressive cushioning layer and yet permits localized movement the optical fibers relative to the buffer tube to account for disparate thermal expansion and to accommodate optical fiber placement. | 02-02-2012 |
| 20120014652 | Adhesively Coupled Optical Fibers and Enclosing Tape - The present invention relates to optical-fiber cables having a tape enclosing one or more optical fibers. A plurality of discrete deposits of adhesive material are typically used to couple the optical fibers to the enclosing tape. A buffer tube may enclose the optical fibers and the tape. The buffer tube typically has a buffer-tube adhesive filling coefficient of between about 0.001 and 0.05. | 01-19-2012 |
| 20120012205 | ASSEMBLY COMPRISING AT LEAST ONE DUCT AND AT LEAST ONE DISTRIBUTION BOX, AND A METHOD OF MOUNTING A DISTRIBUTION BOX TO A DUCT - An assembly may include at least one duct and at least one distribution box, wherein the distribution box is mounted on the duct in fluid-tight engagement therewith for enclosing a distribution chamber therewith. Also, a method of mounting a distribution box to a duct, at a distribution point that is spaced-apart from duct ends, may include positioning a distribution point duct section in the distribution box, and hermetically sealing a distribution chamber, defined within the distribution box, from an environment of the distribution box. | 01-19-2012 |
| 20120009358 | Curing Method Employing UV Sources That Emit Differing Ranges of UV Radiation - A UVLED apparatus (and related system and method) provide efficient curing of an optical-fiber coating on a drawn glass fiber. The apparatus employs one or more UV-radiation sources that emit electromagnetic radiation to effect the curing of coated glass fiber. | 01-12-2012 |
| 20110305423 | Multimode Fiber - A multimode optical fiber comprises a central core having an alpha profile, a depressed cladding having a portion in continuity with the alpha profile of the central core and a stepped portion, and an outer cladding. The alpha profile is obtained by co-doping at least two dopants. A multimode fiber for Ethernet optical system with an improved bandwidth is thus obtained. | 12-15-2011 |
| 20110302966 | METHOD FOR MANUFACTURING A PRIMARY PREFORM - The present invention relates to a method for manufacturing a primary preform for optical fibres, using an internal vapour deposition process, wherein a gas flow of doped undoped glass-forming gases is supplied to the interior of a hollow substrate tube having a supply side and a discharge side via the supply side thereof, wherein deposition of glass layers on the interior of the substrate tube is effected as a result of the presence of a reaction zone. | 12-15-2011 |
| 20110293290 | Multimode Optical Fibers - A multimode optical fiber has an equivalent modal dispersion value (DMD | 12-01-2011 |
| 20110287195 | Curing Apparatus Employing Angled UVLEDs - A UVLED apparatus (and related system and method) provide efficient curing of an optical-fiber coating on a drawn glass fiber. The apparatus employs one or more UVLEDs that emit electromagnetic radiation into a curing space. An incompletely cured optical-fiber coating, which is formed upon a glass fiber, absorbs emitted and reflected electromagnetic radiation to promote efficient curing. | 11-24-2011 |
| 20110286710 | Single Mode Optical Fiber - An optical transmission fiber comprises a central core having an index difference Δn | 11-24-2011 |
| 20110268400 | Data-Center Cable - The present invention relates to a data-center cable having good attenuation performance both at room temperature and during temperature cycling, as well as good resistance to compression. | 11-03-2011 |
| 20110268398 | Bundled Fiber Optic Cables - The present invention relates to a bundled cable suitable for installation in multiple dwelling unit (MDU) applications. The bundled cable includes two or more binders stranded around multiple stranded cable units. The bundled cable not only maintains its integrity on a reel and during installation, but also reduces installation time. | 11-03-2011 |
| 20110247369 | INTERNAL VAPOUR DEPOSITION PROCESS - A method for manufacturing a primary preform for optical fibres using an internal vapour deposition process, including the steps of: i) providing a hollow glass substrate tube having a supply side and a discharge side, ii) surrounding at least part of the hollow glass substrate tube by a furnace, iii) supplying a gas flow, doped or undoped, of glass-forming gases to the interior of the hollow glass substrate tube via the supply side thereof, iv) creating a reaction zone in which conditions such that deposition of glass will take place on the interior of the hollow glass tube are created, and v) moving the reaction zone back and forth in longitudinal direction over the hollow glass substrate tube between a reversal point located near the supply side and a reversal point located near the discharge side of the hollow glass substrate tube. | 10-13-2011 |
| 20110247368 | INTERNAL VAPOUR DEPOSITION PROCESS - A method for manufacturing a primary preform for optical fibres using an internal vapour deposition process, including the steps of: i) providing a hollow glass substrate tube having a supply side and a discharge side, ii) surrounding at least part of the hollow glass substrate tube by a furnace, iii) supplying doped or undoped glass-forming gases to the interior of the hollow glass substrate tube via the supply side thereof, iv) creating a reaction zone in which conditions such that deposition of glass will take place on the interior of the hollow glass tube are created, and v) moving the reaction zone back and forth along the length of the hollow glass substrate tube between a reversal point located near the supply side and a reversal point located near the discharge side of the hollow glass substrate tube, wherein, during at least part of step v), the gas flow comprises a first concentration of fluorine-containing compound when the reaction zone is moving in the direction of the discharge side. | 10-13-2011 |
| 20110229101 | Single-Mode Optical Fiber - The present invention embraces a single-mode optical fiber typically having reduced bending losses. The optical fiber includes a central core, an intermediate cladding, a buried trench, and an outer cladding. The optical fiber typically has (i), at a wavelength of 1310 nanometers, a mode field diameter with a nominal value of between about 8.6 microns and 9.5 microns (and a tolerance of ±0.4 micron), (ii) a cable cut-off wavelength of no more than 1260 nanometers, and (iii), for a bending radius of 15 millimeters at a wavelength of 1550 nanometers, bending losses of no more than 0.03 dB/turn. | 09-22-2011 |
| 20110226020 | Glass-Tube Extended-Baking Process - Disclosed is a method of heat treating quartz glass deposition tubes at between 900° C. and 1200° C. for at least 115 hours. The resulting deposition tubes are useful in forming optical preforms that can yield optical fibers having reduced added loss. | 09-22-2011 |
| 20110217012 | Broad-Bandwidth Multimode Optical Fiber Having Reduced Bending Losses - A multimode optical fiber includes a central core, an inner cladding, a buried trench, and an outer cladding (e.g., an outer optical cladding). Typically, the optical fiber's central core is a glass-based central core having an alpha-index profile (i.e., a graded-index profile), an outer radius r | 09-08-2011 |
| 20110197732 | CUTTER TOOL AND A METHOD OF MAKING A BRANCH CONNECTION WITH AT LEAST ONE OPTICAL FIBER OF A TELECOMMUNICATIONS CABLE - A cutter tool for cutting at least one optical fiber arranged freely in a cavity of a telecommunications cable, the tool including a cutting element and a tube, the cutting element being adapted to form a snare around at least one optical fiber to be cut, the snare providing two strands of filament adapted to be introduced in the tube, and the tool enabling an optical fiber branch connection to be made over a long distance through an existing tapping window. | 08-18-2011 |
| 20110188826 | Non-Zero Dispersion Shifted Optical Fiber Having a Large Effective Area - A non-zero dispersion shifted optical fiber (NZDSF) includes a central core, an inner cladding, and an outer cladding. The central core has an outer radius r | 08-04-2011 |
| 20110188823 | Non-Zero Dispersion Shifted Optical Fiber Having a Short Cutoff Wavelength - A non-zero dispersion shifted optical fiber (NZDSF) includes a central core, an inner cladding, and an outer cladding. The central core has an outer radius r | 08-04-2011 |
| 20110176782 | Water-Soluble Water-Blocking Element - The present invention provides optical-fiber communication cables with an improved water-blocking element that reduces or eliminates microbending caused by water-swellable particulate powders. In one embodiment, such water-swellable powders may be employed in conjunction with a smooth water-soluble carrier tape. In another embodiment, such water-swellable powders may embedded within a water-soluble binder. The water-blocking element is deployed within optical-fiber buffer tubes to water-block the buffer tubes and to minimize microbending that can occur when water-swellable particulate powders press against optical fibers. | 07-21-2011 |
| 20110164852 | Single-Mode Optical Fiber - Disclosed is an optical transmission fiber having reduced bending and microbending losses that is commercially usable in FTTH or FTTC transmission systems. | 07-07-2011 |
| 20110135264 | Bend-Insensitive Single-Mode Optical Fiber - The present invention embraces a single-mode optical fiber that, at a wavelength of 1550 nanometers, has bending losses of 0.15 dB/turn or less for a radius of curvature of 5 millimeters. | 06-09-2011 |
| 20110135263 | High-Bandwidth Multimode Optical Fiber Having Reduced Bending Losses - The present invention embraces a multimode optical fiber that includes a central core having an alpha-index profile, an inner cladding, a depressed trench, and an outer cladding (e.g., an outer optical cladding). Typically, the central core's alpha-index profile has a minimum refractive index at the central core's radius that corresponds to a refractive index difference with respect to the outer cladding. The optical fiber achieves reduced bending losses and a high bandwidth with a reduced cladding effect for high-data-rate applications. | 06-09-2011 |
| 20110135262 | Multimode Optical Fiber with Low Bending Losses and Reduced Cladding Effect - The present invention embraces an optical fiber that includes a central core having an alpha-index profile with respect to an outer cladding. The optical fiber also includes an inner cladding, a depressed trench, and an outer cladding. Typically, the alpha-index profile of the central core is interrupted at a point having a positive refractive index difference with respect to the outer cladding. The optical fiber achieves reduced bending losses and a high bandwidth with a reduced cladding effect for high-data-rate applications. | 06-09-2011 |
| 20110123162 | High-Bandwidth, Dual-Trench-Assisted Multimode Optical Fiber - The present invention embraces an optical fiber that includes a central core having an alpha-index profile with respect to an outer cladding, a first depressed trench, an inner cladding, a second depressed trench, and an outer cladding (e.g., an outer optical cladding). The second depressed trench's volume is typically greater than the first depressed trench's volume. The optical fiber achieves reduced bending losses and a high bandwidth with a reduced cladding effect for high-data rate applications. | 05-26-2011 |
| 20110123161 | High-Bandwidth Multimode Optical Fiber with Reduced Cladding Effect - The present invention embraces an optical fiber that includes a central core having an alpha refractive index profile with respect to an outer cladding. The optical fiber also includes an inner cladding, a depressed trench, and an outer cladding. The optical fiber achieves reduced bending losses and a high bandwidth with a reduced cladding effect for high-data-rate applications. | 05-26-2011 |
| 20110116753 | Optical-Fiber Cable Having Optical Fibers Adhesively Coupled to Water-Swellable Element - An optical-fiber cable includes an adhesive material that adhesively couples a water-swellable element to a plurality of optical fibers. | 05-19-2011 |
| 20110116160 | Rare-Earth-Doped Optical Fiber Having Small Numerical Aperture - The present invention embraces an amplifying optical fiber having a central core adapted to convey and amplify an optical signal and a cladding that surrounds the central core to confine the optical signal conveyed in the central core. The central core is formed of a core matrix in which nanoparticles are present. The nanoparticles themselves include a nanoparticle matrix and rare-earth-dopant elements. The core matrix may also include one or more additional dopants (i.e., in addition to nanoparticles). The amplifying optical fiber possesses a small numerical aperture and is suitable for use in high-pump-power applications without a degraded gain shape. | 05-19-2011 |
| 20110103754 | BUFFERED OPTICAL FIBER AND TELECOMMUNICATIONS CABLE - A buffered optical fiber ( | 05-05-2011 |
| 20110091171 | Optical-Fiber Cable Having High Fiber Count and High Fiber Density - Disclosed is a reduced-diameter optical-fiber cable that possesses a high fiber count and a high cable fiber density. | 04-21-2011 |
| 20110069932 | High-Fiber-Density Optical-Fiber Cable - Disclosed is an improved optical fiber possessing a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. | 03-24-2011 |
| 20110069724 | Optical fiber for sum-frequency generation - The present invention embraces an optical fiber that includes a central core to transmit optical signals and an optical cladding surrounding the central core to confine transmitted optical signals. The optical fiber typically includes metallic nanostructures for increasing second-order nonlinearity effects. The optical fiber typically has a refractive index profile that ensures a phase-matching condition. | 03-24-2011 |
| 20110064371 | Methods and Devices for Cable Insertion into Latched-Duct Conduit - Disclosed are fiber-optic-cable insertion tools and related methods for inserting fiber optic cables into latched-duct conduit systems. | 03-17-2011 |
| 20110064367 | Multimode Optical Fiber - The present invention embraces a multimode optical fiber that includes a glass-based central core having an alpha-index profile and a glass-based cladding immediately surrounding the optical fiber's central core. Typically, the refractive index difference between the central core's minimum refractive index and the cladding's maximum refractive index is greater than 2×10 | 03-17-2011 |
| 20110058781 | Multimode Optical Fiber Having Improved Bending Losses - The present invention embraces a multimode optical fiber that includes a central core having an alpha refractive index profile with respect to an outer optical cladding and a depressed trench positioned between the central core and the outer optical cladding. The central core's refractive index at its periphery is the same as the outer cladding's refractive index. Typically, an inner cladding is positioned between the central core and the depressed trench. The optical fiber achieves reduced bending losses without significantly increasing numerical aperture. | 03-10-2011 |
| 20110044595 | Transmission Optical Fiber Having Large Effective Area - The present invention relates to a transmission optical fiber. The optical fiber includes, from its center to its periphery a central core, an intermediate cladding, and a depressed cladding. The optical fiber has an effective area (S | 02-24-2011 |
| 20110026889 | Tight-Buffered Optical Fiber Unit Having Improved Accessibility - Disclosed are tight-buffered and semi-tight-buffered optical fiber units. The optical fiber unit includes an optical fiber that is surrounded by a polymeric buffering layer to define a fiber-buffer interface. The buffering layer includes an aliphatic amide slip agent in an amount sufficient for at least some of the aliphatic amide slip agent to migrate to the buffer-fiber interface to thereby promote easy stripping of the buffering layer. For example, at least about 15 centimeters of the polymeric buffering layer can be removed from the optical fiber in a single operation using a strip force of less than about 10 N. | 02-03-2011 |
| 20100310218 | Large Bandwidth Multimode Optical Fiber Having a Reduced Cladding Effect - A multimode optical fiber includes a central core having a radius (r | 12-09-2010 |
| 20100290781 | Microbend-Resistant Optical Fiber - Disclosed is an improved, single-mode optical fiber possessing a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. | 11-18-2010 |
| 20100266249 | Telecommunication Optical Fiber Cable - A telecommunication optical fiber cable possesses a longitudinal central cavity that receives micromodules of optical fibers positioned in parallel. A jacket surrounds the central cavity and a sheath is positioned on the inner periphery of the jacket. A lubricant is provided in the central cavity. | 10-21-2010 |
| 20100254653 | Multimode Fiber - A multimode optical fiber comprises a central core having an alpha profile, a depressed cladding having a portion in continuity with the alpha profile of the central core and a stepped portion, and an outer cladding. The alpha profile is obtained by co-doping at least two dopants. The variation in concentration of each dopant and its derivative in relation to the fiber radius are continuous. A multimode fiber for Ethernet optical system with an improved bandwidth is thus obtained. | 10-07-2010 |
| 20100251775 | DEUTERIUM TREATMENT METHOD FOR OPTICAL FIBRES - A treatment method for an optical fibre including the steps of exposing the fibre to an atmosphere containing deuterium at a given temperature, concentration and pressure, measuring the attenuation in the fibre as a function of time at least one wavelength, during the exposure of the fibre to an atmosphere containing deuterium, identifying an attenuation maximum after an exposure duration, and stopping the exposure of the fibre to the atmosphere containing deuterium when said duration has elapsed. | 10-07-2010 |
| 20100232755 | Single Mode Optical Fiber as well as Optical Communication System - The present invention relates to a single mode optical fiber comprising a first central region having a radius r | 09-16-2010 |
| 20100232753 | Coupling Element for Optical Fiber Cables - The present invention relates to a novel coupling composition that is used within optical fiber cables to protect optical fibers and to couple the optical fibers and the surrounding buffer tube casing. The present invention also relates to optical fiber cables that use the novel coupling composition. | 09-16-2010 |
| 20100215328 | Cable Having Lubricated, Extractable Elements - The invention relates to a cable ( | 08-26-2010 |
| 20100214649 | Optical Fiber Amplifier Having Nanostructures - Disclosed is a stimulated Raman scattering effect (SRS), amplifying optical fiber that includes a central core comprising a dielectric matrix that is capable of vibrating at a given frequency (ω | 08-26-2010 |
| 20100202741 | Central-Tube Cable with High-Conductivity Conductors Encapsulated with High-Dielectric-Strength Insulation - Disclosed is a novel central-tube cable with high-conductivity conductors. The novel central-tube cable according to the present invention yields a fiber optic cable with a smaller diameter than found in stranded-tube-cable designs. | 08-12-2010 |
| 20100189928 | Method for Manufacturing an Optical Fiber Preform - A method for manufacturing an optical fiber preform includes the steps of depositing an inner cladding and a central core inside a fluorine doped silica tube and thereafter collapsing the silica tube to form a primary preform. The fluorine doped silica tube has a cross section area that is no more than about 15 percent smaller than the cross section area of the resulting primary preform. The present method facilitates reduced-cost manufacturing of a high-capacity optical fiber preform, which may be drawn to produce an optical fiber having reduced transmission losses. | 07-29-2010 |
| 20100189400 | Single-Mode Optical Fiber - A single-mode optical fiber possesses, at a wavelength of 1550 nanometers, an effective area greater than about 90 μm | 07-29-2010 |
| 20100189399 | Single-Mode Optical Fiber Having an Enlarged Effective Area - A single-mode optical fiber includes a central core, a first inner cladding, a second inner cladding, and an outer cladding. The optical fiber, at a wavelength of 1550 nanometers, has an effective area greater than or equal to 100 μm | 07-29-2010 |
| 20100189398 | Optical Fiber Preform - An optical fiber preform comprises a primary preform that includes at least one inner cladding and a central core deposited inside a fluorine doped silica tube. The fluorine doped silica tube has a cross section area that is no more than about 15 percent smaller than the cross section area of the primary preform. The optical fiber preform has a large capacity, may be manufactured at reduced cost, and may be drawn to produce an optical fiber having reduced transmission losses. | 07-29-2010 |
| 20100189397 | Single-Mode Optical Fiber - An optical fiber includes a central core, which has a radius r | 07-29-2010 |
| 20100183821 | UVLED Apparatus for Curing Glass-Fiber Coatings - A UVLED apparatus and method provide efficient curing of an optical-fiber coating onto a drawn glass fiber. The apparatus and method employ one or more UVLEDs that emit electromagnetic radiation into a curing space. An incompletely cured optical-fiber coating, which is formed upon a glass fiber, absorbs emitted and reflected electromagnetic radiation to effect improved curing. | 07-22-2010 |
| 20100180640 | Method And System For Manufacturing An Optical Fiber Preform - A method for manufacturing an optical fiber preform is described that includes detecting structural integrity of the tube during a collapsing phase utilizing a fluid flow that is fed to the tube. Also, a system for manufacturing optical fiber preforms is described that comprises a holder configured to hold a tube, a heater configured to heat at least part of the tube to a tube collapsing temperature, and a fluid supply system configured to supply a fluid to the tube held by the holder. The system comprises a tube integrity monitor configured to monitor structural integrity of the tube, during a collapsing phase, by monitoring the fluid. | 07-22-2010 |
| 20100180639 | Method and System For Manufacturing an Optical Fiber Preform - A method is described for manufacturing an optical fiber preform, including a tube collapsing phase, and including monitoring the concentration of at least one fluid component of a fluid that is exhausted from the tube, to detect structural integrity of the tube. A system is also described for manufacturing optical fiber preforms. The system comprising a holder configured to hold a tube, a heater configured to heat at least part of the tube to a tube collapsing temperature, a fluid exhaust configured to discharge fluid from the tube, held by the holder. The system also includes a tube integrity monitor configured to monitor structural integrity of the tube, during a collapsing phase, by monitoring fluid that is discharged from the tube. | 07-22-2010 |
| 20100178020 | Optical Waveguide Assembly, Storage Device, And Method For Installing An Optical Waveguide - An optical waveguide assembly is described that comprises a storage device having a housing ( | 07-15-2010 |
| 20100171945 | Method of Classifying a Graded-Index Multimode Optical Fiber - A method of classifying a graded-index multimode optical fiber includes taking a series of individual measurements at a single wavelength, and using the measurements to characterize the departure of the multimode optical fiber's actual index profile from the corresponding nominal index profile. The measurements, coupled with intermodal dispersion or EMB measurement, may be used to predict the approximate transmission properties of the optical fiber at wavelengths other than the measurement wavelength. | 07-08-2010 |
| 20100166375 | Perforated Water-Blocking Element - The present invention provides optical-fiber communication cables with an improved water-blocking element that reduces or eliminates microbending caused by the water-swellable particulate powders by employing such water-swellable powders in conjunction with a smooth but perforated compression-resistant carrier tape. The water-blocking element is deployed within optical-fiber buffer tubes to water-block the buffer tubes and to minimize microbending that can occur when water-swellable particulate powders press against optical fibers. | 07-01-2010 |
| 20100158455 | Cable, And A Use And Method For Constructing A Cable Network - A cable, provided with at least one signal conductor ( | 06-24-2010 |
| 20100154479 | Method and Device for Manufacturing an Optical Preform - Disclosed is a method and device for manufacturing an optical preform. The method includes supplying dopant-containing glass-forming gases to the interior of a hollow glass substrate tube. Furthermore, the supply flow of dopant-containing glass-forming gases includes a main gas flow and one or more secondary gas flows. The secondary gas flows are divided into subflows, which are supplied to the interior of the hollow glass substrate tube together with the main gas flow. The method further includes effecting deposition of glass layers on the interior surface of the hollow glass substrate tube. | 06-24-2010 |
| 20100150505 | Buffered Optical Fiber - A buffered optical fiber structure includes an optical fiber, a mechanical reinforcement member extending along the optical fiber, a protective sheath having a cavity containing the optical fiber and the mechanical reinforcement member, and an intermediate material contacting the protective sheath and surrounding the optical fiber and the mechanical reinforcement member. | 06-17-2010 |
| 20100142969 | Multimode Optical System - Disclosed is an optical system including a polychromatic optical source emitting multiple transverse modes, an optical link having at least one portion of multimode optical fiber, and an optical device positioned between the optical source and the input of the multimode optical fiber. The optical device can modify the distribution of the energy coupling of the transverse modes emitted by the source in the propagation modes of the multimode optical fiber. | 06-10-2010 |
| 20100142033 | Ionizing Radiation-Resistant Optical Fiber Amplifier - Disclosed is an optical fiber that includes a central core that is suitable for transmitting and amplifying an optical signal and an inner optical cladding that is suitable for confining the optical signal transmitted within the central core. The central core is formed from a core matrix that contains silica-based nanoparticles doped with at least one rare earth element. | 06-10-2010 |
| 20100135627 | Amplifying Optical Fiber and Production Method - Disclosed is an amplifying optical fiber that includes a central core that is suitable for transmitting and amplifying an optical signal and a surrounding optical cladding that is suitable for confining the optical signal transmitted in the central core. The central core is formed from a main matrix that contains nanoparticles doped with at least one rare earth element. | 06-03-2010 |
| 20100135625 | Reduced-Diameter Ribbon Cables with High-Performance Optical Fiber - Disclosed is an improved optical fiber that employs a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. | 06-03-2010 |
| 20100135624 | Reduced-Size Flat Drop Cable - Disclosed is an improved optical fiber that employs a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. | 06-03-2010 |
| 20100135623 | Single-Fiber Drop Cables for MDU Deployments - Disclosed is an improved optical fiber that employs a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. | 06-03-2010 |
| 20100119202 | Reduced-Diameter Optical Fiber - Disclosed is a reduced-diameter optical fiber that employs a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. | 05-13-2010 |
| 20100118388 | Amplifying Optical Fiber and Method of Manufacturing - Disclosed is an amplifying optical fiber having a central core and an optical cladding surrounding the central core. The central core is based on a silica matrix that includes nanoparticles, which are composed of a matrix material that includes doping ions of at least one rare earth element. The amplifying optical fiber can be employed, for example, in an optical amplifier and an optical laser. | 05-13-2010 |
| 20100111479 | Modified Pre-Ferrulized Communication Cable Assembly and Installation Method - Disclosed is a modified pre-ferrulized cable assembly that facilitates installation of an optical fiber communication cable through narrow cable guides having sharp bends. The pre-ferrulized cable assembly includes a communication cable having a free, front end, a semi-finished communication connector, and a suction plug. The invention further relates to efficient methods for installing the modified pre-ferrulized cable assembly through a cable guide. | 05-06-2010 |
| 20100098388 | Optical Fiber Cable Having A Deformable Coupling Element - Disclosed is an optical fiber cable that includes optical fibers and a deformable coupling element enclosed within a buffer tube. The coupling element is formed from a deformable yet substantially incompressible material that is capable of releasably and intermittently coupling the optical fibers to the buffer tube in various orientations. The design of the coupling element layer permits coupling of the optical fibers to the buffer tube without the use of a compressive cushioning layer and yet permits localized movement the optical fibers relative to the buffer tube to account for disparate thermal expansion and to accommodate optical fiber placement. | 04-22-2010 |
| 20100098387 | Optical Fiber Cable Having Raised Coupling Supports - Disclosed is an optical fiber cable that includes optical fibers and a deformable coupling element enclosed within a buffer tube. The coupling element is formed from a deformable yet substantially incompressible material and features a number of raised members projecting toward the optical fibers. The design of the coupling element layer permits coupling of the optical fibers to the buffer tube without the use of a compressive cushioning layer. This arrangement distributes the compressive force applied to discrete points along the outer perimeter of the optical fiber element. | 04-22-2010 |
| 20100092140 | Optical-Fiber Loose Tube Cables - Disclosed is an improved optical fiber that employs a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. | 04-15-2010 |
| 20100092139 | Reduced-Diameter, Easy-Access Loose Tube Cable - Disclosed is an improved optical fiber that employs a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. | 04-15-2010 |
| 20100092138 | ADSS Cables with High-Performance Optical Fiber - Disclosed is an improved optical fiber that employs a novel coating system. When combined with a bend-insensitive glass fiber, the novel coating system according to the present invention yields an optical fiber having exceptionally low losses. | 04-15-2010 |
| 20100092135 | Optical Fiber Cable Assembly - The present invention provides optical fiber communication cable assemblies useful for separating and conveying individual fibers from a multiple optical fiber cable to connectors in a protective manner. The optical fiber cable assembly is suitable for outdoor use and includes a (i) cable with multiple optical fibers; (ii) a furcation unit attached to the cable for directing individual optical fibers from the cable to furcation legs; and (iii) multiple furcation legs receiving at least one of the optical fibers. The furcation legs include (i) a buffer tube surrounding the optical fiber; (ii) strength members surrounding the buffer tube; and (iii) a jacket surrounding the strength members. The furcation legs typically exhibit a tensile rating of at least about 50 pounds (lb | 04-15-2010 |
| 20100067859 | Single Mode Optical Fiber - An optical transmission fiber comprises a central core having an index difference Δn | 03-18-2010 |
| 20100067857 | High-Fiber-Density Optical Fiber Cable - Disclosed is a fiber-optic cable that possesses a high cable filling coefficient (and/or a high cable fiber density) yet ensures that its enclosed optical fibers demonstrate improved attenuation performance when subjected to temperature variations between about −40° C. and 70° C. The fiber-optic cable is suitable for efficient installation into ducts, such as via blowing. | 03-18-2010 |
| 20100067855 | Buffer Tubes for Mid-Span Storage - Disclosed is a buffer tube that possesses a higher buffer-tube filling coefficient. Optical fibers enclosed within the buffer tube demonstrate improved attenuation performance when subjected to temperature variations between about −40° C. and 70° C. The buffer tube is suitable for deployments requiring mid-span access. | 03-18-2010 |
| 20100067850 | AUTOMATED OPTICAL SWITCH AND METHOD - An automated optical switch for use in a central office to increase coupling density including a frame having a mating plate defining a plurality of precision alignment holes formed therethrough. In one embodiment, the precision alignment holes are sized and configured to receive corresponding pairs of optical fibers with polished end faces disposed within ferrules free of connector housings. In another embodiment, the precision alignment holes are sized and configured to receive optical fibers with polished end faces free of ferrules and connector housings. | 03-18-2010 |
| 20100021170 | Wavelength Multiplexed Optical System with Multimode Optical Fibers - The present wavelength multiplexed optical system includes a multimode optical fiber that transmits wavelength multiplexed optical signals and a plurality of multimode modal dispersion compensation optical fibers. Each modal dispersion compensation optical fiber can transmit one of the multiplex wavelengths, and each modal dispersion compensation optical fiber has an optimized index profile such that the modal dispersion for the transmitted wavelength is approximately inversely equal to the modal dispersion induced in the multimode optical fiber. The wavelength multiplexed optical system facilitates an increased bitrate without reducing bandwidth. | 01-28-2010 |
| 20100021117 | Single-Mode Optical Fiber - Disclosed is an optical transmission fiber having reduced bending and microbending losses that is commercially usable in FTTH or FTTC transmission systems. | 01-28-2010 |
| 20090279836 | Bend-Insensitive Single-Mode Optical Fiber - A single-mode optical fiber includes a central core, an intermediate cladding, a depressed trench, and an external optical cladding. The central core has a radius r | 11-12-2009 |
| 20090279835 | Single-Mode Optical Fiber Having Reduced Bending Losses - A single-mode optical fiber includes a central core, an intermediate cladding, a depressed trench, and an external optical cladding. The central core has a radius r | 11-12-2009 |
| 20090279834 | DATA COMMUNICATION CABLE - A data communication cable comprising a plurality of optical glass fibres, in which optical glass fibres of the fluorine-doped graded-index multimode glass fibre type are used. The present invention further relates to the use of fluorine-doped graded-index multimode optical glass fibres in an optical glass fibre ribbon. An object of the present invention is to provide a data communication cable in which the maximum difference in signal propagation time between the channels in the data communication cable is reduced to a minimum. | 11-12-2009 |
| 20090279833 | Buffer Tube with Adhesively Coupled Optical Fibers and/or Water-Swellable Element - A buffer tube arrangement includes an adhesive material to adhesively bond a water-swellable element to a plurality of optical fibers and/or a buffer tube. | 11-12-2009 |
| 20090263092 | Optical Fiber - An improved optical fiber achieves both reduced bending and microbending losses, as well as a much higher Brillouin threshold, as compared to standard transmission fibers. The optical fiber comprises a core including at least two dopants and having a refractive index difference Δn | 10-22-2009 |
| 20090252469 | Dispersion-Shifted Optical Fiber - A dispersion-shifted optical fiber (NZDSF) includes a central core (r | 10-08-2009 |
| 20090214167 | Optical Cable Buffer Tube with Integrated Hollow Channels - Disclosed is a buffer tube that incorporates hollow channels into its wall. This reduction in material moderates the buffer tube's thermal expansion and contraction. | 08-27-2009 |
| 20090207486 | AMPLIFIER OPTICAL FIBER COMPRISING NANOPARTICLES AND PRODUCTION METHOD - An amplifier optical fiber comprising a central core of a dielectric matrix doped with at least one element ensuring the amplification of an optical signal transmitted in the fiber and a cladding surrounding the central core and suitable for confining the optical signal transmitted in the core. The fiber also comprises metallic nanostructures suitable for generating an electronic surface resonance in the dielectric matrix of central core, the wavelength of said electronic surface resonance corresponding to an excitation level of the element ensuring the amplification. | 08-20-2009 |
| 20090190888 | OPTICAL CABLE - The present invention relates to an optical cable comprising one or more optical waveguides, which one or more optical waveguides are provided with a protective layer, a buffer tube surrounding said one or more optical waveguides, which buffer tube is surrounded by an outer sheath, while a radial interspace is present between said outer sheath and said buffer tube, which radial interspace is filled with a filler. | 07-30-2009 |
| 20090185780 | Fluorine-Doped Optical Fiber - A single mode optical transmission fiber comprises a depressed core having at least 0.41 weight percent fluorine and an index difference (|Δn | 07-23-2009 |
| 20090173107 | METHOD FOR MANUFACTURING A PREFORM AS WELL AS A METHOD FOR FORMING OPTICAL FIBRES FROM SUCH A PREFORM - A method for manufacturing a preform for optical fibers by means of a vapour deposition process, wherein plasma conditions are created and wherein the plasma is moved back and forth along the longitudinal axis of the hollow substrate tube between a reversal point near the supply side and a reversal point near the discharge side of the hollow substrate tube, so that the location where the soot deposition associated with one phase takes place is axially spaced from the location where the soot deposition associated with the other phase(s) takes place. | 07-09-2009 |
| 20090087153 | Optical Fiber Microcable with Multilayer Protective Sheath - Disclosed is a central loose tube fiber optic microcable that includes a protective sheath enclosing a plurality of optical fibers. The microcable protective sheath is composed of two layers of different synthetic materials, namely an inner layer having an elasticity modulus of about 1500-3000 MPa and an outer layer having an elasticity modulus of about 600-1200 MPa. | 04-02-2009 |
| 20090078006 | Method for Forming an Improved Weld Between a Primary Preform and a Silica Bar - The invention relates to a method for welding one end of a primary preform and one end of a silica bar having different properties. The method includes the steps of projecting and fusing silica grain under a plasma torch onto an end of the primary preform and an end of the silica bar, and bringing into contact these respective ends to form an excellent weld between the primary preform and the silica bar. The invention provides a cost-effective way to secure a primary preform to a glass-working lathe support while reducing the risk of costly preform breakage. | 03-26-2009 |
| 20090041414 | Method for Accessing Optical Fibers within a Telecommunication Cable - Disclosed is a method accessing one or more optical fibers in a telecommunication cable in a way that considerably reduces the risk of damaging the optical fibers. To avoid inadvertent damage caused by a cutting tool, the method includes moving optical fibers and/or micromodules away from the area on the cable that is to be cut. | 02-12-2009 |
| 20090041410 | Suppresson of Undesirable Signal Propagation Mode(S) Downstream of Mode Converter - An optical device (D) is dedicated to the transformation of the propagation mode of optical signals. This device comprises at least a first mode converter ( | 02-12-2009 |
| 20090022906 | Apparatus and Method for Performing a PCVD Process - The present invention relates to an apparatus for carrying out a PCVD process in which one or more doped or undoped glass layers are coated onto the interior of a glass substrate tube. The apparatus comprises an applicator having an inner wall and an outer wall and a microwave guide that opens into the applicator. The applicator extends around a cylindrical axis and which is provided with a passage adjacent to the inner wall, through which the microwaves supplied via the microwave guide can exit, over which cylindrical axis the substrate tube can be positioned, while the applicator is fully surrounded by a furnace that extends over the cylindrical axis. | 01-22-2009 |
| 20090019894 | Method for Manufacturing a Multimode Optical Fibre - The invention relates to a multimode optical fibre having a refractive index profile, comprising a light-guiding core surrounded by one or more cladding layers. The present invention furthermore relates to an optical communication system comprising a transmitter, a receiver and a multimode optical fibre. | 01-22-2009 |
| 20090010602 | Semi-Tight Optical Fiber Unit - Disclosed is a dry, semi-tight optical fiber unit that includes one or more optical fibers positioned within a buffer tube. A protective coating is provided upon the surface of the optical fibers, and an anti-adhesive coating is substantially bonded to the protective coating. One or more of these optical fiber units may be included in an optical cable. Also disclosed is a method for efficiently producing such an optical fiber unit. | 01-08-2009 |
| 20090010596 | OPTICAL COMMUNICATION SYSTEM AS WELL AS A ACCESS NETWORK PROVIDED THEREWITH - The invention relates to an access network for exchanging communication signals between a transit network and at least one communication medium of a user. The communication medium is operatively connected to an exchange by means of an optical fibre connection for exchanging the communication signals, and the exchange is connected to the transit network. The fibre connection comprises at least one multimode fibre, which is bent over at least one first part of its length, in such a manner that the fibre comprises at least one complete winding in the first part thereof mainly for maintaining one or more modes of the communication signals into the fibre. Said modes have been selected from a group comprising the ground mode and one or more lower modes near the ground mode. | 01-08-2009 |
| 20090004404 | METHOD FOR MANUFACTURING A PREFORM FOR OPTICAL FIBRES BY MEANS OF A VAPOUR DEPOSITION PROCESS - The present invention relates to a method for manufacturing a preform for optical fibres by means of a vapour deposition process, wherein an intermediate step is carried out between one deposition phase and the next deposition phase(s), wherein the intermediate step comprises supplying an etching gas to the supply side of the hollow substrate tube. | 01-01-2009 |
| 20090003787 | METHOD FOR MANUFACTURING A PREFORM AS WELL AS A METHOD FOR FORMING OPTICAL FIBRES FROM SUCH A PREFORM - The present invention relates to a method for manufacturing a preform for optical fibres by means of a vapour deposition process, wherein plasma conditions are created, and wherein the plasma is moved back and forth along the longitudinal axis of the hollow substrate tube between a reversal point near the supply side and a reversal point near the discharge side of the hollow substrate tube, wherein a transition deposition is carried out between the deposition of one phase and the deposition of the other phase. | 01-01-2009 |
| 20090003785 | Coupling Composition for Optical Fiber Cables - The present invention relates to a novel coupling composition that is used within optical fiber cables to protect optical fibers and to couple the optical fibers and the surrounding buffer tube casing. The present invention also relates to optical fiber cables that use the novel coupling composition. | 01-01-2009 |
| 20090003781 | Optical Fiber Cable Having A Deformable Coupling Element - Disclosed is an optical fiber cable that includes optical fibers and a deformable coupling element enclosed within a buffer tube. The coupling element is formed from a deformable yet substantially incompressible material that is capable of releasably and intermittently coupling the optical fibers to the buffer tube in various orientations. The design of the coupling element layer permits coupling of the optical fibers to the buffer tube without the use of a compressive cushioning layer and yet permits localized movement the optical fibers relative to the buffer tube to account for disparate thermal expansion and to accommodate optical fiber placement. | 01-01-2009 |
| 20090003779 | Optical Fiber Cable Having Raised Coupling Supports - Disclosed is an optical fiber cable that includes optical fibers and a deformable coupling element enclosed within a buffer tube. The coupling element is formed from a deformable yet substantially incompressible material and features a number of raised members projecting toward the optical fibers. The design of the coupling element layer permits coupling of the optical fibers to the buffer tube without the use of a compressive cushioning layer. This arrangement distributes the compressive force applied to discrete points along the outer perimeter of the optical fiber element. | 01-01-2009 |
| 20080317410 | Modified Pre-Ferrulized Communication Cable Assembly and Installation Method - Disclosed is a modified pre-ferrulized cable assembly that facilitates installation of an optical fiber communication cable through narrow cable guides having sharp bends. The pre-ferrulized cable assembly includes a communication cable having a free, front end, a semi-finished communication connector, and a suction plug. The invention further relates to efficient methods for installing the modified pre-ferrulized cable assembly through a cable guide. | 12-25-2008 |
| 20080292262 | Grease-Free Buffer Optical Fiber Buffer Tube Construction Utilizing a Water-Swellable, Texturized Yarn - A buffered optical fiber arrangement that includes a buffer tube in which is provided optical fibers and a texturized yarn coated with a water-swellable material. The filament diameter of the yarn used in the present invention may be between about 5 microns and about 100 microns, more preferably between about 10 and about 60 microns, still more preferably between about 20 and about 40 microns. The linear density, or denier in grams per 9000 meters, of the base yarn may be between about 100 and 1000, more preferably between about 200 and 600, or still more preferably between about 250 and 350. The degree of decrease in length (the “degree of texturizing”) between the perfectly straight filaments before texturizing and the texturized filament may be between 1 percent and 90 percent, more preferably between about 2 percent and 50 percent, or still more preferably between about 5 percent and 25 percent. | 11-27-2008 |
| 20080282743 | Extended-Baking Process for Glass Deposition Tubes - Disclosed is a method of heat treating quartz glass deposition tubes at between 900° C. and 1200° C. for at least 115 hours. The resulting deposition tubes are useful in forming optical preforms that can yield optical fibers having reduced added loss. | 11-20-2008 |
| 20080271494 | Method for making an optical preform - The present invention relates to a method for manufacturing a preform for optical fibers via a vapor deposition process in which the position of the reversal point near the substrate tube's supply side shifts along the longitudinal axis of the substrate tube during at least part of the deposition process. | 11-06-2008 |
| 20080268174 | Apparatus and Method for Manufacturing an Optical Preform - The present invention relates to an apparatus and related method for manufacturing an optical preform. The present invention embraces a novel insert tube that is strategically positioned within a quartz substrate tube during the internal vapor deposition process. | 10-30-2008 |
| 20080260343 | Slotted Ribbon Splitting Tool - Disclosed is a tool and related method for splitting optical fiber ribbons into smaller optical fiber ribbon sub-units. | 10-23-2008 |
| 20080250817 | Method and Apparatus for Manufacturing an Optical Fiber Preform - The invention embraces a method for manufacturing an optical fiber preform. The primary preform is overcladded by projecting silica grain under a plasma torch, wherein, during overcladding, at least one region adjacent to the plasma torch is cooled by gas provided by at least one cooling nozzle. The invention facilitates low-cost preform overcladding in a way that limits the incorporation of impurities into the silica overcladding. | 10-16-2008 |
| 20080199137 | Optical Fiber Cable and Method for Modifying the Same - Disclosed is an optical fiber cable that includes a main tube. A guide tube, which includes at least one optical element, is positioned within the main tube's central space. A compressible element is also positioned within the main tube's central space. To reduce the adverse effects of ice formation within the optical fiber cable, the compressible element more readily deforms than do the guide tube and main tube. Also disclosed is a method for modifying a conventional optical fiber cable with a compressible element according to the present invention. | 08-21-2008 |
