Patent application number | Description | Published |
20100030585 | Insurance fulfillment system with open vendor interface - An insurance fulfillment system is disclosed that includes, in one general aspect, an interactive vendor interface and storage for item listings. It also includes fulfillment management logic that is responsive to the interactive vendor interface, operative to access the storage, and responsive to a claim settlement system. A shopping access interface is operative to display aggregated item listings from different vendors and is responsive to selection commands to select items based on a claim settlement amount received from the claim settlement system. | 02-04-2010 |
20100049552 | First Notice Of Loss reporting with integrated claim processing - In one general aspect, an insurance claim processing method is disclosed. It includes establishing a communication session over a communication link between a first location for a first insured and a claim processing location, and receiving a first notice of loss communication from the first location at the claim processing location during the communication session over the communication link. It also includes receiving item identification information about a series of different items affected by the loss from the first location at the claim processing location through the communication link, and accessing insurance valuation information about the items at the claim processing location during the communication session. | 02-25-2010 |
20100235198 | Synchronous insurance inspection and valuation - Disclosed in one general aspect is an insurance item valuation method that includes establishing a communication link between a location in an operations base and a field site and transmitting item identification information about a series of different discrete items in different item categories located at the field site through the communications link. Insurance valuation information about the items is accessed at the operations base, and an acknowledgement about the insurance valuation information is transmitted from the operations base to the field site. | 09-16-2010 |
Patent application number | Description | Published |
20130188949 | Techniques For Reducing Crosstalk In Multicore Fibers - An optical fiber has two or more core regions disposed within a common cladding region. Each of the core regions is configured to guide a respective light transmission comprising at least one optical mode along the length of the fiber. The cores are arranged within the common cladding region according to a core configuration that substantially prevents crosstalk between modes of neighboring cores in the fiber, in a deployment of the fiber in which cross-coupling between neighboring cores is affected by perturbations arising in the deployed fiber. | 07-25-2013 |
20130251324 | Large Mode Area Optical Fibers With Bend Compensation - A LMA, single-mode optical fiber comprises a core region, an inner cladding region surrounding the core region, and an outer cladding region surrounding the inner cladding region. The inner cladding region is configured to provide bend compensation. In one embodiment the index profile of the inner cladding region is graded with a slope of γn | 09-26-2013 |
20140036351 | Pump-Combining Systems And Techniques For Multicore Fiber Transmissions - An optical fiber coupler connects transmission multicore optical fiber (TMCF) with an amplifier multicore optical fiber (AMCF) and a plurality of optical pump fibers. The coupler includes a plurality of signal cores extending between a multicore input endface and a coupler output endface, and a plurality of pump cores extending between a pump input and the coupler output endface. The multicore input endface is connectable to the TMCF, and the pump input is connectable to the optical pump fibers. Each pump core is paired with a corresponding signal core to form a core pair that is adiabatically tapered such that signal light carried by the signal core is combined with pump light carried by the pump core. The coupler output endface is connectable to the AMCF such that the combined light output of each core pair is provided as an input to a respective AMCF core. | 02-06-2014 |
20140098361 | MEASURING MODAL CONTENT OF MULTI-MODED FIBERS - Techniques for analyzing output modal content of optical fibers that support more than one spatial mode are disclosed. These techniques are based on spatially resolving interference between co-propagating modes and constructing a spatial beat pattern between the co-propagating modes. By doing so, these techniques provide information about the modes that propagate along the optical fiber. | 04-10-2014 |
20140119700 | NON-LINEAR FIBER RESISTANT TO PERTURBATIONS - Embodiments of the present invention relate to a fiber design that achieves high nonlinearity, an effective index providing phase matching for an illustrative wavelength conversion process, and a low sensitivity to perturbations in fiber scaling. In one embodiment, a fiber comprises an inner core having an inner core radius and an inner core index, an outer core having an outer core radius and an outer core index, the outer core index being lower than the inner core index, an inner cladding, having an inner cladding radius and an inner cladding index, the inner cladding index being less than the outer core index, and an effective index of the fiber, the effective index being greater than the inner cladding index and less than the outer core index, wherein the fiber has a low perturbation sensitivity factor of dispersion to scaling less than about 20 ps/nm/km along the length of the fiber. | 05-01-2014 |
20140161404 | Multicore Fiber Designs for Spatial Multiplexing - In an optical fiber, a plurality of individual cores extend through a common cladding. Each individual core supports at least one local transverse spatial mode. The individual cores and surrounding cladding are structured to support propagation of plurality of desired signal-carrying modes, while suppressing undesired modes, thereby supporting the propagation of one or more spatially multiplexed signals. The core-to-core spacing of the fiber is configured to maintain an acceptably low level of mode-coupling between cores. | 06-12-2014 |
20140270666 | HOLLOW CORE FIBER WITH POLARIZATION DEPENDENT LOSS - A hollow core fiber having polarization dependent loss is provided. The hollow core fiber embedded in a cellular cladding having a plurality of cells arranged in a nominally regular cellular lattice. A pre-determined number of cells at pre-determined locations within a cellular cladding are substituted by leakage cells that differ in at least one property including a physical or a chemical property, or both. The leakage cells collectively provide a leakage path that may preferably be made polarization sensitive, such that a core mode with a particular polarization state is selectively coupled to the cladding, thereby inducing polarization dependent loss. The leakage cells may be dispersed along a symmetry axis in a radial distance longer than one or more lattice spacing away from the core. The polarization dependent loss may be controlled further by asymmetric core shapes and/or by introducing additional surface features along the core-cladding interface. | 09-18-2014 |
20140334788 | Bend Compensated Filter Fiber - An optical fiber includes a core region having a longitudinal axis. A cladding region surrounds the core region. The core region and cladding region are configured to support and guide the propagation of signal light in a fundamental transverse mode in the core region in the directions of the axis. The fiber has a bend-induced gradient of its equivalent index of refraction indicative of a loss in guidance of the mode. At least a portion of cladding region has a graded index of refraction opposite the bend-induced gradient. The cladding region is configured to have a substantially flat equivalent index in response to a bend of the optical fiber. | 11-13-2014 |
Patent application number | Description | Published |
20090059352 | METHOD AND ARRANGEMENT FOR MITIGATING BEND DISTORTION IMPACT IN A FIBER AMPLIFIER OR LASER - A method of producing an optical amplifying assembly includes providing an amplifying fiber and selecting a first portion and a second portion of the amplifying fiber such that a bend of substantially the same radius and length would cause greater distortion impairments in the first portion than in the second portion. The method further includes coiling the second portion and arranging the first portion to mitigate the impairments due to bend distortion. | 03-05-2009 |
20110274398 | MULTICORE FIBERS AND ASSOCIATED STRUCTURES AND TECHNIQUES - A multicore fiber comprises a plurality of cores extending along the length of a fiber body. Each of the cores is surrounded by a cladding. The plurality of cores and surrounding cladding provide respective index variations, so as to form a respective plurality of waveguides for conducting parallel data transmissions from a first end of the fiber to a second end. The plurality of cores has a cross-sectional geometry in which the plurality of cores is configured in a polygonal array, in which at least some of the cores are positioned at the vertices of the array. The polygonal array is configured such that neighboring cores in the array are separated from each other by a distance that is sufficient to prevent crosstalk therebetween. | 11-10-2011 |
20110274435 | MULTICORE FIBER TRANSMISSION SYSTEMS AND METHODS - An optical data link includes first and second pluralities of transmission devices, at least one of which is configured as an array. A multichannel transmission link has a first end connected to the first plurality of transmission devices and a second end connected to the second plurality of transmission devices so as to form a plurality of parallel transmission channels therebetween. The multichannel transmission link includes a multicore fiber with a plurality of individual cores having a configuration matching the array configuration of the at least one plurality of transmission devices. The multicore fiber has an endface connected directly to the at least one plurality of transmission devices, with the individual cores of the multicore fiber aligned with respective devices in the at least one plurality of transmission devices. Further described are access networks and core networks incorporating a transmission link comprising at least one span of a multicore fiber. | 11-10-2011 |
20110279888 | MULTICORE TRANSMISSION AND AMPLIFIER FIBERS AND SCHEMES FOR LAUNCHING PUMP LIGHT TO AMPLIFIER CORES - An optical transmission and amplification system includes a multichannel transmission span with a length of a multicore transmission fiber having a plurality of individual transmission cores. A first tapered multicore coupler provides connectivity between the plurality of transmission cores of the multicore fiber and a respective plurality of individual transmission leads. A fiber amplifier is provided having a plurality of individual cores including at least one pump core and a plurality of amplifier core. A second tapered multicore coupler provides connectivity between the amplifier cores of the fiber amplifier and a respective plurality of amplifier leads, and between the at least one pump core and a respective pump lead. | 11-17-2011 |
20110280517 | TECHNIQUES AND DEVICES FOR LOW-LOSS, MODEFIELD MATCHED COUPLING TO A MULTICORE FIBER - Devices and techniques are described for connecting each of plurality of terminals to respective individual cores of a multicore fiber. Each of the plurality of terminals is provided with a respective length of a single-core fiber. The single-core fibers are configured to maintain modal properties that arc substantially the same, within a tolerance range, at the front and rear ends, as the single-core fiber is tapered. The single-core fibers are assembled together. The front end of the assembly is tapered to form a front cross-section in which the single-core fiber cores are arranged in a configuration matching that of the cores of the multicore fiber. | 11-17-2011 |
Patent application number | Description | Published |
20090034059 | Suppression of higher-order modes by resonant coupling in bend-compensated optical fibers - The effect of bending is anticipated in an optical fiber design, so that resonant coupling remains an effective strategy for suppressing HOMs. The index profile of the fiber and its bend radius are configured so that there is selective resonant coupling of at least one HOM, but not the fundamental mode, in the bent segment of the fiber. In an illustrative embodiment, the bend radius (or predetermined range of bend radii) of an optical fiber is known a priori. The core and cladding regions are configured to support (guide) the propagation of signal light in a fundamental transverse mode and at least one higher-order transverse mode in the core region. The cladding region includes an outer cladding region and an annular trench region. The trench region includes at least one axially extending, raised-index pedestal (waveguide) region having a refractive index higher than that of the outer cladding region. Within at least the bent segment the at least one pedestal region is configured (i) to support the propagation of at least one transverse mode and (ii) to resonantly couple at least one of the higher-order transverse modes (HOMs) of the core region to at least one transverse mode (e.g., the fundamental mode) of the pedestal region when the fiber is bent to a radius within the predetermined range of radii. In effect, the pedestal regions are configured so that the fiber is pre-compensated for the effect of bending; that is, an uncompensated bent fiber segment suffers high fundamental mode loss due to resonant coupling, whereas the pre-compensated bent fiber segment selectively couples any unwanted HOM from the core region into the pedestal region. In a preferred embodiment, the optical fiber is a LMA fiber incorporated in an optical fiber amplifier or laser package. | 02-05-2009 |
20090059353 | Large-mode-area optical fibers with reduced bend distortion - In a LMA optical fiber the index of the core region is graded (i.e., as viewed in a radial cross-section) and has a grading depth of Δn | 03-05-2009 |
20090060437 | Bend insensitivity in single mode optical fibers - An optical fiber that is relatively insensitive to bend loss comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode, the cladding region including (i) an outer cladding region having a refractive index less than that of the core region, (ii) an annular cladding pedestal region having a refractive index higher than that of the outer cladding region and comparable to that of the core region, and (iii) an annular cladding inner trench region disposed between the core region and the pedestal region, the inner trench region having a refractive index less than that of the outer cladding region. In one embodiment, the fiber also includes a (iv) an annular cladding outer trench region disposed between the pedestal region and the outer cladding region, the outer trench region having a refractive index less than that of the outer cladding region. In addition, to suppress HOMs the pedestal region is configured to resonantly couple at least one other transverse mode of the core region to at least one transverse mode of the pedestal region. Such fiber is advantageously used as access fiber, but may have other applications, such as sensor fiber. | 03-05-2009 |
20100002980 | Polarization-dependent hollow-core optical fibers - In accordance with one aspect of my invention, the core and cladding regions of a hollow-core optical fiber are configured so that a signal mode is coupled to a cladding mode in order to exploit polarization-dependent properties. In general, the fiber comprises a hollow-core region surrounded by a cladding region, which includes a localized hollow-waveguide region. The core and waveguide regions are configured so that the coupling between a signal mode in the core region and a cladding mode in the waveguide region are phase-matched for efficient coupling, and the phase-matching condition is made polarization-dependent to provide improved control of the fiber's polarization dependent properties. In a preferred embodiment, the cladding region comprises a bandgap structure. In one embodiment, the at least one region has a non-symmetric cross-sectional shape (e.g., oblong) with respect to one of its transverse axes. In an alternative embodiment, both the core region and the waveguide region are non-symmetric but with respect to orthogonal axes. In another embodiment, the at least one region has a multiplicity of micro-defects disposed at or near the periphery thereof and in a non-rotationally-symmetric pattern. In an alternative embodiment, both the core region and the waveguide region include a multiplicity of micro-defects at or near the periphery thereof in a non-rotationally-symmetric pattern. Optical fibers of this type find application in polarization-dependent optical couplers (e.g., splitters, polarizers) and in sensors. | 01-07-2010 |
Patent application number | Description | Published |
20090290841 | Reduced Bend Sensitivity and Catastrophic Bend Loss In Single Mode Optical Fibers and Method of Making Same - An optical fiber that is relatively insensitive to bend loss and alleviates the problem of catastrophic bend loss comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode. The cladding region includes (i) an outer cladding region, (ii) an annular pedestal (or ring) region, (iii) an annular inner trench region, and (iv) an annular outer trench region. The pedestal region and the outer cladding region each have a refractive index relatively close to that of the outer cladding region. In order to suppress HOMs the pedestal region is configured to resonantly couple at least one (unwanted) transverse mode of the core region (other than the fundamental mode) to at least one transverse mode of the pedestal region. In a preferred embodiment, the fiber is configured so that, at a signal wavelength of approximately 1550 nm, its bend loss is no more than about 0.1 dB/turn at bend radius of 5 mm and is no more than about 0.02 dB/turn at a bend radius of 10 mm. In addition, in one embodiment, the core region also includes an inner core region and an annular outer core (or shelf) region surrounding the inner core region. The outer core region extends radially a distance of less than 9 μm from the fiber axis. In another embodiment, the inner trench region includes an annular inner portion and an annular outer (or step) portion surrounding said inner portion. The refractive index of the step portion is greater than that of the inner portion. In a preferred embodiment, both of the foregoing features of the core region and the inner trench region are incorporated in the fiber. Also described are multi-tube fabrication techniques for making such fibers. | 11-26-2009 |
20110026891 | Single mode optical fibers and modular method of making same - An optical fiber that concurrently satisfies G.657 and G.652 standards comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode, the cladding region including (i) an outer cladding region having a refractive index n | 02-03-2011 |
20110129190 | Techniques for Manipulating Crosstalk in Multicore Fibers - A multicore optical fiber includes a plurality of core regions disposed within a common cladding region. Each of the plurality of core regions is configured, in combination with the common cladding region, to propagate light along a longitudinal axis of the fiber. At least two core regions are configured to inhibit resonant coupling of propagated light therebetween within a selected region of operation. At least one segment of the fiber includes a twist that is configured such that when the twisted segment is subjected to a bend having a selected radius, the twist creates a controlled change in the amount of crosstalk between the at least two core regions, compared with the amount of crosstalk between the at least two core regions when a bend having the selected radius is introduced into a non-twisted segment of the fiber. | 06-02-2011 |
20110194813 | BEND INSENSITIVITY IN SINGLE MODE OPTICAL FIBERS - An optical fiber that is relatively insensitive to bend loss comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode, the cladding region including (i) an outer cladding region having a refractive index less than that of the core region, (ii) an annular cladding pedestal region having a refractive index higher than that of the outer cladding region and comparable to that of the core region, and (iii) an annular cladding inner trench region disposed between the core region and the pedestal region, the inner trench region having a refractive index less than that of the outer cladding region. In one embodiment, the fiber also includes a (iv) an annular cladding outer trench region disposed between the pedestal region and the outer cladding region, the outer trench region having a refractive index less than that of the outer cladding region. In addition, to suppress HOMs the pedestal region is configured to resonantly couple at least one other transverse mode of the core region to at least one transverse mode of the pedestal region. Such fiber is advantageously used as access fiber, but may have other applications, such as sensor fiber. | 08-11-2011 |
20110194814 | BEND INSENSITIVITY IN SINGLE MODE OPTICAL FIBERS - An optical fiber that is relatively insensitive to bend loss comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode, the cladding region including (i) an outer cladding region having a refractive index less than that of the core region, (ii) an annular cladding pedestal region having a refractive index higher than that of the outer cladding region and comparable to that of the core region, and (iii) an annular cladding inner trench region disposed between the core region and the pedestal region, the inner trench region having a refractive index less than that of the outer cladding region. In one embodiment, the fiber also includes a(iv) an annular cladding outer trench region disposed between the pedestal region and the outer cladding region, the outer trench region having a refractive index less than that of the outer cladding region. In addition, to suppress HOMs the pedestal region is configured to resonantly couple at least one other transverse mode of the core region to at least one transverse mode of the pedestal region. Such fiber is advantageously used as access fiber, but may have other applications, such as sensor fiber. | 08-11-2011 |
20120159995 | Methods of making single mode optical fibers with reduced bend sensitivity and catastrophic bend loss - An optical fiber that is relatively insensitive to bend loss and alleviates the problem of catastrophic bend loss comprises a core region and a cladding region configured to support and guide the propagation of light in a fundamental transverse mode. The cladding region includes (i) an outer cladding region, (ii) an annular pedestal (or ring) region, (iii) an annular inner trench region, and (iv) an annular outer trench region. The pedestal region and the outer cladding region each have a refractive index relatively close to that of the outer cladding region. In order to suppress HOMs the pedestal region is configured to resonantly couple at least one (unwanted) transverse mode of the core region (other than the fundamental mode) to at least one transverse mode of the pedestal region. In a preferred embodiment, the fiber is configured so that, at a signal wavelength of approximately 1550 nm, its bend loss is no more than about 0.1 dB/turn at bend radius of 5 mm and is no more than about 0.02 dB/turn at a bend radius of 10 mm. In addition, in one embodiment, the core region also includes an inner core region and an annular outer core (or shelf) region surrounding the inner core region. The outer core region extends radially a distance of less than 9 μm from the fiber axis. In another embodiment, the inner trench region includes an annular inner portion and an annular outer (or step) portion surrounding said inner portion. The refractive index of the step portion is greater than that of the inner portion. In a preferred embodiment, both of the foregoing features of the core region and the inner trench region are incorporated in the fiber. Also described are multi-tube fabrication techniques for making such fibers. | 06-28-2012 |
20130091899 | Method Of Making An Optical Fiber With Trench Region In Its Index Profile - An optical fiber that is relatively insensitive to bend loss and alleviates the problem of catastrophic bend loss configured to support and guide the propagation of light in a fundamental transverse mode. The cladding region includes an outer cladding region, a pedestal region, an inner trench region, and an outer trench region. The pedestal region and the outer cladding region each have a refractive index relatively close to that of the outer cladding region. To suppress HOMs the pedestal region is configured to resonantly couple at least one (unwanted) transverse mode of the core region (other than the fundamental mode) to at least one transverse mode of the pedestal region. Also described are multi-tube fabrication techniques for making such fibers as well as single-pass/double-pass fabrication techniques for making the trench regions of such fibers. | 04-18-2013 |
20130243949 | Modular Method of Making Single Mode Optical Fibers - Described is a modular method of making an optical fiber comprising a core and a cladding configured to support and guide a fundamental transverse mode, the cladding including (i) an outer cladding having an index n | 09-19-2013 |
20150104131 | SHUNT FIBER - Shunt fibers having a photonic bandgap cladding region including one or more hollow guiding regions of which one guiding region is configured as the core and one or more other guiding regions are configured as shunts, respectively, provide nearly single mode transmission in the core. The effective mode index of unwanted core modes and modes in one or more shunts are matched closely enough such that higher order modes will selectively couple to the shunt modes by resonant phase matching in the presence of fiber variations. The shunts are designed to have relatively higher losses thereby effectively dissipating power in the higher order modes at a faster rate. | 04-16-2015 |
Patent application number | Description | Published |
20080296626 | NITRIDE SUBSTRATES, THIN FILMS, HETEROSTRUCTURES AND DEVICES FOR ENHANCED PERFORMANCE, AND METHODS OF MAKING THE SAME - The present invention provides nitride semiconductors having a moderate density of basal plane stacking faults and a reduced density of threading dislocations, various products based on, incorporating or comprising the nitride semiconductors, including without limitation substrates, template films, templates, heterostructures with or without integrated substrates, and devices, and methods for fabrication of templates and substrates comprising the nitride semiconductors. | 12-04-2008 |
20090001519 | GROWTH OF PLANAR, NON-POLAR, GROUP-III NITRIDE FILMS - Growth methods for planar, non-polar, Group-III nitride films are described. The resulting films are suitable for subsequent device regrowth by a variety of growth techniques. | 01-01-2009 |
20100133663 | TECHNIQUE FOR THE GROWTH OF PLANAR SEMI-POLAR GALLIUM NITRIDE - A method for growing planar, semi-polar nitride film on a miscut spinel substrate, in which a large area of the planar, semi-polar nitride film is parallel to the substrate's surface. The planar films and substrates are: (1) {10 | 06-03-2010 |
20110278585 | GROWTH OF REDUCED DISLOCATION DENSITY NON-POLAR GALLIUM NITRIDE - Lateral epitaxial overgrowth (LEO) of non-polar gallium nitride (GaN) films results in significantly reduced defect density. | 11-17-2011 |
20120074425 | GROWTH OF REDUCED DISLOCATION DENSITY NON-POLAR GALLIUM NITRIDE - Lateral epitaxial overgrowth (LEO) of non-polar gallium nitride (GaN) films results in significantly reduced defect density. | 03-29-2012 |
20120119222 | TECHNIQUE FOR THE GROWTH OF PLANAR SEMI-POLAR GALLIUM NITRIDE - A method for growing planar, semi-polar nitride film on a miscut spinel substrate, in which a large area of the planar, semi-polar nitride film is parallel to the substrate's surface. The planar films and substrates are: (1) {10 | 05-17-2012 |
20120187454 | NITRIDE SUBSTRATES, THIN FILMS, HETEROSTRUCTURES AND DEVICES FOR ENHANCED PERFORMANCE, AND METHODS OF MAKING THE SAME - The present invention provides nitride semiconductors having a moderate density of basal plane stacking faults and a reduced density of threading dislocations, various products based on, incorporating or comprising the nitride semiconductors, including without limitation substrates, template films, templates, heterostructures with or without integrated substrates, and devices, and methods for fabrication of templates and substrates comprising the nitride semiconductors. | 07-26-2012 |