Patent application number | Description | Published |
20080271495 | Reduction of optical fiber cane/preform deformation in consolidation - According to an embodiment of the invention a method of manufacturing optical fiber cane comprises the steps of: (i) providing a core rod manufactured of relatively low viscosity glass; (ii) depositing SiO | 11-06-2008 |
20080276650 | Microstructured optical fibers and methods - Method of making a microstructured optical fiber. Silica glass based soot is deposited on a substrate to form at least a portion of an optical fiber preform by traversing a soot deposition burner with respect to said substrate at a burner traverse rate greater than 3 cm/sec, thereby depositing a layer of soot having a thickness less than 20 microns for each of a plurality of burner passes. At least a portion of the soot preform is then consolidated inside a furnace to remove greater than 50 percent of the air trapped in said soot preform, said consolidating taking place in a gaseous atmosphere containing krypton, nitrogen, or mixtures thereof under conditions which are effective to trap a portion of said gaseous atmosphere in said preform during said consolidation step, thereby forming a consolidated preform which when viewed in cross section will exhibit at least 50 voids therein. | 11-13-2008 |
20080277565 | Optical fiber for optical power transmission - An optical fiber adapted to carry optical power for powering an electrical device and also optionally adapted to carry optical data for signal processing. The optical fiber capable of carrying both optical data and optical power includes a central data waveguide region that carries data light and an annular power waveguide region concentrically surrounding the data waveguide region and adapted to carry relatively large amounts of optical power. A first annular isolation region between the data and power waveguide regions and that includes microstructures serves to optically isolate the waveguide regions. An outer annular isolation region serves to confine power light to the power waveguide region and contributes to the bend-resistance of the optical fiber. An optical power and optical data distribution system that utilizes the optical fiber is also described. | 11-13-2008 |
20080279515 | Optical fiber containing alkali metal oxide - Disclosed is an optical fiber having a silica-based core comprising an alkali metal oxide a silica-based core, said core comprising an alkali metal oxide selected from the group consisting of K | 11-13-2008 |
20080304800 | Optical fiber with large effective area - An optical fiber comprising: a glass core extending from a centerline to a radius R | 12-11-2008 |
20090049815 | Thin-walled porous ceramic wall-flow filter - A thin-walled porous ceramic wall-flow filter is disclosed. The filter produces a relatively lower pressure drop coupled with relatively high initial filtration efficiency (FE | 02-26-2009 |
20090126407 | Methods for making optical fiber preforms and microstructured optical fibers - A method of making an optical fiber preform includes depositing silica glass on the inside of a tube substrate via a plasma chemical vapor deposition (PCVD) operation. The parameters of the PCVD operation are controlled such that the silica glass deposited on the interior of the tube substrate contains a non-periodic array of voids in a cladding region of the optical fiber preform. The optical fiber preform may be used to produce an optical fiber having a core and a void containing cladding. The core of the optical fiber has a first index of refraction and the cladding has a second index of refraction less than that of the core. | 05-21-2009 |
20090126408 | Methods for making optical fiber preforms and microstructured optical fibers - A method of making an optical fiber preform includes depositing silica glass soot on the inside of a substrate tube via a chemical vapor deposition operation. The silica glass soot is consolidated into silica glass under controlled conditions such that the consolidated silica glass on the interior of the substrate tube contains a non-periodic array of gaseous voids in a cladding region of the optical fiber preform. The optical fiber preform may be used to produce an optical fiber having a core and a cladding containing voids formed from the gaseous voids of the cladding region of the optical fiber preform. The core of the optical fiber has a first index of refraction and the cladding has a second index of refraction less than that of the core. | 05-21-2009 |
20090202211 | Microstructured Transmission Optical Fiber - Microstructured optical fiber for single-moded transmission of optical signals, the optical fiber including a core region and a cladding region, the cladding region including an annular void-containing region that contains non-periodically disposed voids. The optical fiber provides single mode transmission and low bend loss. | 08-13-2009 |
20100046899 | Low Bend Loss Single Mode Optical Fiber - Optical waveguide fiber that is bend resistant and single mode at 1260 nm and at higher wavelengths. The optical fiber includes a core of radius R | 02-25-2010 |
20100126144 | Systems And Methods For Estimating Particulate Load In A Particulate Filter - A method for regenerating a particulate filter may comprise determining a temperature, a flow rate, and a total pressure drop of an exhaust gas flowing through a particulate filter, and determining a corrected soot layer permeability. The method may further comprise calculating an estimated soot load of the particulate filter based on the total pressure drop and the corrected soot layer permeability, and causing regeneration of the particulate filter when the estimated soot load is greater than or equal to a threshold value. | 05-27-2010 |
20100126145 | Methods For Estimating Particulate Load In A Particulate Filter, And Related Systems - A method for regenerating a particulate filter may comprise calculating a first estimated soot load of a particulate filter based on a pressure drop of an exhaust gas flowing through the particulate filter, and calculating a second estimated soot load of the particulate filter based on a mass balance of soot in the particulate filter. The method may further comprise calculating a hybrid estimated soot load based on the first estimated soot load and the second estimated soot load, wherein calculating the hybrid estimated soot load comprises applying at least one gate so as to weight a relative contribution of each of the first estimated soot load and the second estimated soot load to the hybrid estimated soot load, and causing regeneration of the particulate filter when the hybrid estimated soot load is greater than or equal to a threshold value. | 05-27-2010 |
20100180561 | Filtration Structures For Improved Particulate Filter Performance - A particulate filter may comprise an inlet end, an outlet end, and a plurality of channels disposed and configured to flow fluid from the inlet end to the outlet end, wherein the channels are defined by porous walls configured to trap particulate matter. The porous walls may have a total porosity greater than about 45%, a median pore size ranging from about 13 micrometers to about 20 micrometers, and a pore size distribution such that pores less than 10 micrometers contribute less than about 10% porosity. | 07-22-2010 |
20100180772 | Particulate Filters and Methods for Regenerating Particulate Filters - A particulate filter may comprise an inlet end, an outlet end, and a plurality of channels disposed and configured to flow fluid from the inlet end to the outlet end, wherein the channels are defined by porous walls configured to trap particulate matter. The porous walls may have a cell density less than about 200 cpsi, a wall thickness of less than about 14 mils, a median pore size that ranges from about 13 micrometers to about 20 micrometers, a total porosity greater than about 45%, and a pore size distribution such that pores less than 10 micrometers contribute less than about 10% porosity. | 07-22-2010 |
20100195966 | Large Effective Area Fiber With GE-Free Core - According to some embodiments an optical waveguide fiber comprises:
| 08-05-2010 |
20100303428 | Bend Resistant Multimode Optical Fiber - Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a depressed-index annular region, wherein the inner boundary of said depressed index region is an extension of the graded index core, the depressed region having a moat volume greater than 105%-um | 12-02-2010 |
20100310219 | Microstructured Transmission Optical Fiber - A microstructured optical fiber for transmitting optical signals comprised of light, the optical fiber comprising:
| 12-09-2010 |
20110048227 | Particulate Filters And Methods Of Filtering Particulate Matter - A particulate filter may comprise an inlet end, an outlet end, and a plurality of parallel channels disposed and configured to flow fluid from the inlet end to the outlet end, the channels being defined by a plurality of porous walls configured to trap particulate matter. The particulate filter may define at least one filtration region including a first group of channels and at least one bypass region including a second group of channels, wherein at least some of the channels in the first group of channels are plugged at an end thereof, wherein the channels in the second group of channels are unplugged, and wherein greater than or equal to about 70% of the plurality of parallel channels are plugged at an end thereof. | 03-03-2011 |
20110064368 | Low Bend Loss Optical Fiber - An optical fiber includes a central glass core region comprising maximum refractive index delta percent Δ | 03-17-2011 |
20110100063 | Methods For Forming An Overclad Portion Of An Optical Fiber From Pelletized Glass Soot - Methods of forming an overclad portion of an optical fiber are described which include positioning a core cane member in an overclad tube to form a rod and tube assembly. Thereafter, glass soot pellets are positioned in the rod and tube assembly between the core cane member and an interior sidewall of the overclad tube. The rod and tube assembly is then redrawn under conditions effective to form the overclad tube and the glass soot pellets into a continuous, void-free glass layer surrounding the core cane member at a sintering time t | 05-05-2011 |
20110129191 | LARGE EFFECTIVE AREA FIBER - An optical fiber with a glass core extending from a centerline to a radius R | 06-02-2011 |
20110132038 | Soot Pressing for Optical Fiber Overcladding - A method and an apparatus for making an optical fiber preform comprising the steps of (i) depositing a plurality of rods are deposited into an inner cavity of an apparatus; (ii) depositing particulate glass material in the inner cavity between the rods and the inner wall; and (iii) applying pressure against the particulate glass material to pressurize the particulate glass material against the plurality of rods. | 06-09-2011 |
20110132194 | Partial Wall-Flow Filter and Method. - A partial wall-flow filter having some unplugged flow-through channels and some plugged channels. Desirable combinations of filtration efficiency and back pressure may be provided by combinations of t wall≦305 urn, MPD≦20 μm, % P≧50%, and CD≧250 cpsi wherein t wall is the transverse thickness of the porous walls, MPD is a mean pore diameter of the porous walls, % P is the total porosity of the porous walls, and CD is the cell density of the channels. In one embodiment, some of the plugged channels are located adjacent to the inlet end and some are located adjacent to the outlet end. Systems and method including the partial wall-flow filter are also described. | 06-09-2011 |
20110209460 | Systems And Methods For Determining A Particulate Load In A Particulate Filter - A method for regenerating a particulate filter may comprise calculating a soot layer state correction factor based on a rate of regeneration and a rate of particulate loading in the particulate filter and calculating an estimated soot load in the particulate filter based on a pressure drop of an exhaust gas flowing through the particulate filter and the calculated soot layer state correction factor. The method for regenerating the particulate filter may further comprise causing regeneration of the particulate filter when the estimated soot load is greater than or equal to a threshold value. | 09-01-2011 |
20110211796 | LOW BEND LOSS OPTICAL FIBER - An optical fiber having both low macrobend loss and low microbend loss. The fiber has a first inner cladding region having an outer radius r | 09-01-2011 |
20110211797 | Optical Fiber with Increased Mechanical Strength - An optical fiber having increased mechanical strength is provided. The optical fiber includes an over cladding layer that has a compressive stress of at least 100 MPa. | 09-01-2011 |
20110318555 | Glass Sheets With Improved Mechanical Strength - Transparent glass sheets having increased mechanical strength include an inner layer surrounded by surface compressive layers wherein the difference of the coefficient of thermal expansion of the inner layer and the surface compressive layer is greater than 50×10 | 12-29-2011 |
20120106909 | LARGE EFFECTIVE AREA OPTICAL FIBER WITH LOW BEND LOSS - An optical fiber includes a central glass core region comprising maximum refractive index delta percent Δ | 05-03-2012 |
20120125053 | METHOD OF MANUFACTURING OPTICAL FIBER WITH SELECTED DRAW TENSION - A method of manufacturing an optical fiber includes providing a preform in a furnace, and drawing a plurality of optical fibers from the preform at a plurality of different draw tensions. A bandwidth characteristic of each of the optical fiber is drawn at the different draw tensions is measured. A draw tension setpoint is selected based on the measured bandwidth characteristic of each optical fiber and the draw tension is adjusted to the selected draw tension setpoint. The method further includes drawing from the preform a tuned optical fiber at the selected draw tension setpoint which provides peak bandwidth. | 05-24-2012 |
20120186304 | MICROSTRUCTURED TRANSMISSION OPTICAL FIBER - Microstructured optical fiber for single-moded transmission of optical signals, the optical fiber including a core region and a cladding region, the cladding region including an annular void-containing region that contains non-periodically disposed voids. The optical fiber provides single mode transmission and low bend loss. | 07-26-2012 |
20120202674 | Treatment of Silica Based Soot or an Article made of Silica Based Soot - One embodiment of the disclosure relates to a method of cleaning silica-based soot or an article made of silica-based soot, the method comprising the step of treating silica-based soot or the article made of silica-based soot with at least one of the following compounds: (i) a mixture of CO and Cl | 08-09-2012 |
20120230638 | BEND RESISTANT MULTIMODE OPTICAL FIBER - Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a first region having index delta percent Δ | 09-13-2012 |
20120247088 | EXHAUST GAS AFTER-TREATMENT SYSTEM - An exhaust gas after-treatment system ( | 10-04-2012 |
20120276291 | Methods and Apparatuses for Reducing Gelation of Glass Precursor Materials During Vaporization - Methods and apparatuses for vaporizing liquid precursor material for use in a vapor deposition process are disclosed. The method for vaporizing liquid precursor material includes introducing a flow of liquid precursor material into an expansion chamber and directing the flow of liquid precursor material towards a wall of the chamber. The wall of the chamber is heated to a temperature sufficient to vaporize a first portion of the flow of liquid precursor material while a second portion of the flow of liquid precursor material remains in a liquid state and a third portion of the liquid precursor material is formed into gel. The expansion chamber is continuously drained as the flow of liquid precursor material is introduced into the expansion chamber. The chamber is heated to a temperature to produce a sufficient amount of the second portion of the liquid precursor material to flush the gel from the chamber. | 11-01-2012 |
20120321249 | LASER-PROCESSED GRIN LENSES AND OPTICAL INTERFACE DEVICES AND ASSEMBLIES USING SAME - Laser-processed gradient-index (GRIN) lenses and optical interface devices and assemblies that utilize the laser-processed GRIN lenses are disclosed. A GRIN lens assembly includes a cylindrical central section having a GRIN index profile, planar front and back surfaces, an outer surface, and a diameter D | 12-20-2012 |
20130000840 | Methods for Producing Optical Fiber Preforms with Low Index Trenches - Methods for forming optical fiber preforms with low-index trenches are disclosed. According to one embodiment, the method includes depositing silica-based glass soot on a bait rod to form a low-index trench region of the optical fiber preform. The silica-based glass soot is deposited such that the low-index trench region has a first density. Thereafter a barrier layer having a second density greater than the first density is formed around the low-index trench region. Therafter, an overclad region is deposited around the barrier layer. The bait rod is then removed from a central channel of the trench-overclad assembly. A separate core assembly is inserted into the central channel. A down-dopant gas is then directed through the central channel of the trench-overclad assembly as the trench-overclad assembly is heated to dope the low-index trench region. The barrier layer prevents diffusion of the down-dopant from the low-index trench region into the overclad region. | 01-03-2013 |
20130011319 | APPARATUS FOR MIXING VAPORIZED PRECURSOR AND GAS AND METHOD THEREFOR - An apparatus for mixing a vaporized precursor with a gas for producing silica particles is provided. The apparatus includes a mixer housing, a precursor delivery chamber having an output in communication with the mixer housing for delivering a vaporized precursor in the mixer housing, and an oxidizing gas delivery chamber having an output in communication with the mixer housing for delivering an oxidizing gas to be mixed with the vaporized precursor. The apparatus further includes a flashback member disposed within the mixer housing and between the output of the precursor delivery chamber and the output of the oxidizing gas delivery chamber. The flashback member is located at a minimum distance from the output of the oxidizing gas delivery chamber defined by L | 01-10-2013 |
20130029038 | METHOD OF MAKING A MULTIMODE OPTICAL FIBER - A method of making a multimode optical fiber is disclosed. In one embodiment the method includes calculating a core radius that maximizes the bandwidth of the multimode optical fiber wherein the effect of draw tension is accounted for. The embodiments herein illustrate how core radius can be tuned so the time delay of the outermost guided mode group is reduced. The resultant core radius may be targeted for a value off-nominal from what would be expected for a particular commercial optical fiber type. | 01-31-2013 |
20130044987 | LOW BEND LOSS OPTICAL FIBER - An optical fiber having both low macrobend loss and low microbend loss. The fiber has a first inner cladding region having an outer radius r | 02-21-2013 |
20130077926 | MULTIMODE OPTICAL FIBER AND SYSTEM INCORPORATING SUCH - According to some embodiments, a multimode optical fiber comprises a graded index glass core with refractive index Δ1, a maximum refractive index delta Δ1 | 03-28-2013 |
20130114934 | GE-P CO-DOPED MULTIMODE OPTICAL FIBER - According to at least one embodiment a graded index multimode fiber comprises: (i) a silica based core co-doped with GeO | 05-09-2013 |
20130114935 | BEND LOSS RESISTANT MULTI-MODE FIBER - A graded index multimode optical fiber comprising: (a) a silica core doped with germania, and at least one co-dopant, comprising one of P | 05-09-2013 |
20130136405 | LOW BEND LOSS OPTICAL FIBER - One embodiment of a single mode optical fiber includes:
| 05-30-2013 |
20130136406 | LOW BEND LOSS OPTICAL FIBER - An optical fiber comprising: (I) a germania doped central core region having outer radius r | 05-30-2013 |
20130136407 | LOW BEND LOSS OPTICAL FIBER - According to some embodiments a single mode fiber includes:
| 05-30-2013 |
20130136408 | LOW BEND LOSS OPTICAL FIBER - One embodiment of a single mode optical fiber includes:
| 05-30-2013 |
20130322836 | MULTIMODE OPTICAL FIBER AND SYSTEM COMPRISING SUCH FIBER - A multimode optical fiber includes a graded index glass core having a diameter in the range of 41 microns to 80 microns, a graded index having an alpha less than 2.04 and a maximum relative refractive index in the range between 0.6% and 1.8%. The cladding includes a depressed-index annular portion. The fiber has an overfilled bandwidth greater than 2.5 GHz-km at 1310 nm. | 12-05-2013 |
20130322837 | MULTIMODE OPTICAL FIBER AND SYSTEM COMPRISING SUCH FIBER - One exemplary multimode optical fiber includes a graded index glass core having a diameter in the range of 41 microns to 80 microns, a graded index having an alpha less than 2.04 and a maximum relative refractive index in the range between 0.6% and 1.8%. The cladding includes a depressed-index annular portion. The fiber has an overfilled bandwidth greater than 2.5 GHz-km at at least one wavelength between 1200 nm and 1700 nm. | 12-05-2013 |
20140174133 | METHODS FOR FORMING OPTICAL FIBER PREFORMS WITH SELECTIVE DIFFUSION LAYERS - Methods for forming optical fiber preforms are disclosed. According to one embodiment, a method for forming an optical fiber preform includes forming a preform core portion from silica-based glass soot. The silica-based glass soot may include at least one dopant species for altering an index of refraction of the preform core portion. A selective diffusion layer of silica-based glass soot may be formed around the preform core portion to form a soot preform. The selective diffusion layer may have an as-formed density greater than the density of the preform core portion. A diffusing species may be diffused through the selective diffusion layer into the preform core portion. The soot preform may be sintered such that the selective diffusion layer has a barrier density which is greater than the as-formed density and the selective diffusion layer prevents diffusion of the at least one dopant species through the selective diffusion layer. | 06-26-2014 |
20140208946 | PARTIAL WALL-FLOW FILTER AND METHOD - A partial wall-flow filter has an inlet end, an outlet end, and a plurality of parallel channels disposed and configured to flow fluid from the inlet end to the outlet end. The channels are defined by a plurality of porous walls. A first portion of the channels have a first hydraulic diameter Dh1, a second portion of the channels have a second hydraulic diameter Dh2 smaller than the first hydraulic diameter Dh1, and the ratio of Dh1:Dh2 is in the range of 1.1 to 1.6. At least a portion of channels having hydraulic diameter Dh1 are plugged at the outlet end, and channels having hydraulic diameter Dh2 are flow-through channels. | 07-31-2014 |
20140241684 | LOW ATTENUATION OPTICAL FIBERS WITH AN F-GRADED INDEX CORE - An optical fiber is provided that includes a fiber configured to transmit optical data in a plurality of modes or in a single mode; a core region in the fiber that comprises fluorine-doped silica; and a cladding in the fiber that surrounds the core region and that comprises fluorine-doped silica. The core region has a graded refractive index profile with an alpha of about 0.5 to 5. The core of the fiber may be set with a radius of approximately 6 to 50 microns. The cladding may also comprise one or a plurality of layers, including trench or moat regions of a relatively lower refractive index. Still further, an inner cladding may be doped with fluorine at a concentration greater than that in the core region. An outer cladding can comprise silica with fluorine at a concentration below or equal to that in the inner cladding. | 08-28-2014 |
20140301708 | LOW BEND LOSS OPTICAL FIBER - An optical fiber having both low bend loss. The fiber has a central core region having refractive index Δ | 10-09-2014 |
20140308015 | LOW DIAMETER OPTICAL FIBER - Small-radius coated optical fibers having large mode field diameter and low bending losses. The coated fiber may have an outer radius of 110 μm or less, while providing a mode field diameter of 9.0 μm or greater and a bending loss when wrapped about a 15 mm mandrel of 0.5 dB/km or less at wavelength of 1550 nm. The coated fiber may have a mode field diameter of 9.2 μm or greater and may have a bending loss at 1550 nm of 0.25 dB/km or less when wrapped about a 20 mm mandrel or a bending loss at 1550 nm of 0.02 dB/km or less when wrapped about a 30 mm mandrel. | 10-16-2014 |
20140352361 | METHOD FOR MAKING LOW BEND LOSS OPTICAL FIBER PREFORMS - A method of making an optical fiber preform comprising in order: (i) manufacturing a glass preform with at least one porous layer; (ii) exposing the glass preform with at least one porous layer to a fluorine precursor at temperature below 1295° C. to make a fluorine treated preform, and (iii) exposing the fluorine treated glass preform with at least one porous silica based layer the temperatures above 1400° C. to completely sinter the preform. Preferably, the porous silica based layer of the glass preform exposed to fluorine precursor has average density of at least 0.7 g/cm | 12-04-2014 |
20140356273 | APPARATUS FOR MIXING VAPORIZED PRECURSOR AND GAS AND METHOD THEREFOR - An apparatus for mixing a vaporized precursor with a gas for producing silica particles is provided. The apparatus includes a mixer housing, a precursor delivery chamber having an output in communication with the mixer housing for delivering a vaporized precursor in the mixer housing, and an oxidizing gas delivery chamber having an output in communication with the mixer housing for delivering an oxidizing gas to be mixed with the vaporized precursor. The apparatus further includes a flashback member disposed within the mixer housing and between the output of the precursor delivery chamber and the output of the oxidizing gas delivery chamber. The flashback member is located at a minimum distance from the output of the oxidizing gas delivery chamber defined by L | 12-04-2014 |
20140363670 | OPTICAL PREFORMS AND METHODS FOR FORMING THE SAME - Optical preforms and methods for forming optical preforms are disclosed. According to one embodiment, a method for producing an optical preform includes compressing silica-based glass soot to form a porous optical preform comprising a soot compact. The porous optical preform is heated to a dwell temperature greater than or equal to 100° C. Thereafter, the porous optical preform is humidified at the dwell temperature in a water-containing atmosphere having a dew point greater than or equal to 30° C. to form a humidified porous optical preform. The soot compact portion of the humidified porous optical preform generally comprises greater than or equal to 0.5 wt. % water. | 12-11-2014 |
20150040614 | METHODS OF MAKING OPTICAL FIBER WITH REDUCED HYDROGEN SENSITIVITY THAT INCLUDE FIBER REDIRECTION - A method of making optical fibers that includes controlled cooling to produce fibers having a low concentration of non-bridging oxygen defects and low sensitivity to hydrogen. The method may include heating a fiber preform above its softening point, drawing a fiber from the heated preform and passing the fiber through two treatment stages. The fiber may enter the first treatment stage at a temperature between 1500° C. and 1700° C., may exit the first treatment stage at a temperature between 1200° C. and 1400° C., and may experience a cooling rate less than 5000° C./s in the first treatment stage. The fiber may enter the second treatment stage downstream from the first treatment stage at a temperature between 1200° C. and 1400° C., may exit the second treatment stage at a temperature between 1000° C. and 1150° C., and may experience a cooling rate between 5000° C./s and 12,000° C./s in the second treatment stage. The method may also include redirecting the fiber with a fluid bearing device or an air-turn device. | 02-12-2015 |