Entries |
Document | Title | Date |
20080199134 | System for identifying optical fibers and cables - An optical fiber or a cable can comprise marks that uniquely identify the fiber or cable and that facilitate tracing materials thereof back to manufacturing. The marks can extend lengthwise along the fiber or cable, for example from end-to-end. A user of the optical fiber or cable can make an identification from an end-on view. The marks can be encoded with information based on the number of marks, the widths of the individual marks, and/or the spacing between each mark. The marks can comprise a continuous barcode that is integrated into a material of the optical fiber or cable. The glassy material of a fiber optic preform can comprise an embedded set of enlarged marks, so that drawing optical fiber from the preform pulls marks of appropriate size into the fiber's cladding material. The marks can alternatively comprise encoded stripes extruded into a cable jacket. | 08-21-2008 |
20080199135 | Archimedean-lattice microstructured optical fiber - A microstructured optical fiber exhibiting enhanced circularity of the guided light mode is provided. The microstructured optical fiber includes a light-guiding core and a primary cladding surrounding the core wherein the primary cladding has a plurality of holes arranged in hexagonal unit cells defining an Archimedean-like lattice. Preferably, the core is defined by a break in a center of the Archimedean-like lattice, the break being characterised by an absence of at least one of the unit cells. Also preferably, each of the unit cells has seven holes arranged in a centred hexagon. A method of making the microstructured optical fiber is also provided. The method includes fabricating a fiber preform by stacking a plurality of canes around a rod, each cane having a number of holes arranged in a unit cell defining an Archimedean-like lattice, and drawing said fiber preform into the microstructured optical fiber. | 08-21-2008 |
20080205835 | Optical Fiber Having Reduced Hydrogen Induced Loss And The Method For Producing The Same - A method for producing optical fiber having reduced hydrogen induced loss is provided wherein the optical fiber is treated with deuterium gas for a predetermined duration. The predetermined duration of deuterium treatment is determined based on three factors, that is, a) the concentration of deuterium at which fiber is to be treated with deuterium; b) the reaction temperature at which fiber is to be treated with deuterium; and c) the pressure inside the chamber at which fiber is to be treated with deuterium. | 08-28-2008 |
20080205836 | HEAT-RESISTING PLASTIC OPTICAL FIBER AND MANUFACTURING METHOD THEREOF - A heat-resisting plastic optical fiber which excels in heat resistance and mass production and a manufacturing method thereof. The heat-resisting plastic optical fiber has a core which consists of transparent resin, and clad coated on the outer periphery of the core, which consists of the resin whose refractive index is lower than that of core. Precursor of material for the core material consists of the mixture of a group of monomers which contain polyfunctional monomer and transparent thermoplastic polymer. | 08-28-2008 |
20080219628 | Photonic Funnels and Anisotropic Waveguides for Subdiffraction Light Compression and Pulse Management at the Nanoscale - The present invention provides an apparatus for propagating electromagnetic radiation of a selected vacuum wavelength beyond the diffraction limit. The apparatus comprises a waveguide core and a cladding disposed about the core. The waveguide core may include a material with an anisotropic dielectric permittivity, with the optical axis of the material primarily aligned with direction of light propagation. In addition, the waveguide core may have a cross-sectional dimension smaller than about ½ of the selected wavelength at least at one portion of the waveguide core. The cross-sectional dimension of the waveguide core may decrease along the length of the waveguide core creating a taper to provide a photonic funnel. The waveguide core may comprise a homogeneous anisotropic material, anisotropic metamaterial, or a photonic crystal. | 09-11-2008 |
20080232752 | MARKED BODY AND MANUFACTURING METHOD THEREOF - To provide a marked body that can bear the temperature of heat treatment that is required for a PLC. A lower clad layer, a marked body, a cylindrical part, a buried layer, and an upper clad layer are laminated on a silicon substrate. The marked body is formed with a void that is formed in the buried layer made with a silicon oxide film. Therefore, the heat resistance can be improved dramatically compared to a case of the marked body that is made of metal or the like. Moreover, the refractive index within the void is about 1, so that it is possible to have a sufficient difference between the diffractive index of the material of the periphery of the void and the diffractive index within the void. This makes it possible to achieve a high-contrast marked body. | 09-25-2008 |
20080253726 | Optical fiber, optical fiber connecting method, and optical connector - An optical fiber which, at an optical fiber connecting end having a plurality of voids around the periphery of a core, has a light-permeable substance, such as a resin or glass whose refractive index is lower than that of quartz type substances, filled in the voids adjacent to the connecting end. An optical fiber connecting section where an optical fiber having a plurality of voids in a clad around the periphery of a core is connected to another optical fiber, wherein the optical fiber is connected end-to-end to aforesaid another optical fiber through a refractive index matching agent whose refractive index at the minimum temperature in actual use is lower than that of the core. | 10-16-2008 |
20080260337 | Epoxy-Functional Polysiloxanes, Silicone Composition, and Coated - Epoxy-functional polysiloxanes containing epoxy groups and hydrocarbyl groups free of aliphatic unsaturation, a silicone composition containing a polysiloxane selected from the aforementioned epoxy-functional polysiloxanes, a cured polysiloxane prepared by exposing the silicone composition to ultraviolet radiation, a coated optical fiber containing a cured polysiloxane, and a method of preparing a coated optical fiber. | 10-23-2008 |
20080267571 | Electro-optic Polymer Devices with Semiconducting Oligomer Clads - An electro-optic waveguide device comprising an electro-optic polymer core and at least one crosslinked polymer clad, wherein the crosslinked polymer clad is comprised of a first constitutional unit derived from a compound having the formula | 10-30-2008 |
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 |
20080285926 | Optical Fiber Having Desired Waveguide Parameters and Method for Producing the Same - A method for producing an optical fiber having desired cutoff wavelength, mode field diameter [MFD] and zero dispersion wavelength [ZDW] waveguide parameters even when actual refractive index [RI] profile has various configurations is provided. The method comprises overcladding/clad jacketing over the core rod based on predetermined core diameter of the core rod; refractive index [RI] profile of core of the core rod; and refractive index [RI] profile of clad of the core rod to achieve said waveguide parameters within the predetermined limits. | 11-20-2008 |
20080285927 | Single Mode Optical Fiber Having Reduced Macrobending and Attenuation Loss and Method for Manufacturing the Same - A method for manufacturing an optical fiber having uniform refractive index profile, and substantially reduced macrobending loss and attenuation loss is provided comprising controlling one or more of parameters including concentration of dopant in outer region and inner region of the core region with respect to middle region of the core region of the optical fiber preform, duration of dehydration process step, concentration of chlorine gas to control refractive index of outer region and inner region of the core region for achieving a fiber having substantially uniform refractive index profile, and substantially reduced macrobending loss and attenuation loss. | 11-20-2008 |
20080298758 | Fiber optic cables and assemblies and the performance thereof - A fiber optic jumper assembly comprising at least one bend performance optical fiber comprising a core region and a cladding region surrounding the core region, the cladding region comprising an annular hole-containing region comprised of non-periodically disposed holes, a protective covering positioned over the at least one bend performance optical fiber, and at least one connector mounted upon each end of the at least one bend performance optical fiber. A preconnectorized fiber optic jumper assembly comprising a microstructured fiber having a delta attenuation of 0.00 dB at 5 wraps about a 6 mm diameter at a reference wavelength of 1625 nm. | 12-04-2008 |
20080298759 | OPTICAL FIBER AND OPTICAL WAVEGUIDE - An optical fiber includes a core region having a first refractive index and a cladding region having a second refractive index lower than the first refractive index on an outer circumference of the core region. The cladding region includes four holes formed to have a four-fold rotational symmetry with respect to a center axis around the core region in a longitudinal direction, such that a zero-dispersion wavelength is 900 nm to 1150 nm and a cutoff wavelength is equal to or shorter than 950 nm. | 12-04-2008 |
20080317419 | OPTICAL FIBERS AND OTICAL FIBER DEVICES WITH TOTAL DISPERSION GREATER THAN MATERIAL DISPERSION - Disclosed are optical fiber devices incorporating optical fibers with total dispersion greater than material dispersion, and with preferred dispersion values less than +50 ps/nm-km. The desired dispersion values are obtained when light resides substantially in a single higher order mode (HOM) of the fiber, typically the LP | 12-25-2008 |
20080317420 | LARGE DIAMETER OPTICAL WAVEGUIDE, GRATING AND LASER - A large diameter optical waveguide, grating, and laser includes a waveguide having at least one core surrounded by a cladding, the core propagating light in substantially a few transverse spatial modes; and having an outer waveguide dimension of said waveguide being greater than about 0.3 mm. At least one Bragg grating may be impressed in the waveguide. The waveguide may be axially compressed which causes the length of the waveguide to decrease without buckling. The waveguide may be used for any application where a waveguide needs to be compression tuned. Also, the waveguide exhibits lower mode coupling from the core to the cladding and allows for higher optical power to be used when writing gratings without damaging the waveguide. The waveguide may resemble a short “block” or a longer “cane” type, depending on the application and dimensions used. | 12-25-2008 |
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 |
20090003786 | OPTICAL FIBER MODULE AND OPTICAL DEVICE - An optical fiber module includes an optical fiber that transmits a light and a holding unit that holds the optical fiber in a state in which the optical fiber is stretched in its longitudinal direction to change optical characteristics of the optical fiber. | 01-01-2009 |
20090010603 | Resin Composition for Optical Packaging Material and Process for Preparing the Same, and Optical Packaging Material, Optical Packaging Component, and Optical Module - To provide to a resin composition for an optical packaging material having a coefficient of thermal expansion approximately same as that of quartz and Pyrex (registered trade name) and capable of providing an optical packaging material exhibiting excellent flame retardancy and an optical packaging component, and an optical module and its production method. A molded body, an optical packaging component and an optical module having a low coefficient of thermal expansion and excellent flame retardancy can be obtained using a resin composition for an optical packaging material comprising a resin and inorganic fine particles which are made of a hydrolyzed condensate compound of an alkoxide compound and/or a carboxylic acid salt compound and have an average radius of gyration of 50 nm or smaller. | 01-08-2009 |
20090010604 | Flexible Optical Waveguide, Method For Manufacturing Such Flexible Optical Waveguide, and Optical Module - The present invention relates to a flexible optical waveguide prepared by using a resin film for forming an optical waveguide for at least one of a lower cladding layer, a core layer and an upper cladding layer, wherein a ten point average roughness (Rz) on a surface of either one of the lower cladding layer and the upper cladding layer is 0.5 μm or more and 10 μm or less, a production process for the same and an optical module prepared by using the flexible optical waveguide. Provided are a flexible optical waveguide which is excellent in an adhesive property in compounding with an electric printed wiring board and turning a flexible optical waveguide into a multilayer, a production process for the same and an optical module prepared by using the flexible optical waveguide. | 01-08-2009 |
20090022462 | FIRE RESISTANT JACKET COMPOSITION FOR ELECTRICAL COAXIAL AND FIBER OPTIC CABLE - Zeolite-containing polyvinyl chloride containing compositions that are useful as the insulation for plenum cables are disclosed. A zeolite, either natural or synthetic, can satisfactorily replace either part or all of the molybdenum compound, particularly ammonium octamolybdate, in low smoke polyvinyl chloride based plenum compositions. Ion-exchanged zeolites, such as the zinc ion-exchanged zeolite can also be used. Zeolites are especially useful in lead-free Low Smoke PVC compositions. Because the cost of zeolite is only a fraction of the cost of the molybdenum compounds currently used in plenum cable compositions, this will dramatically reduce the cost of these materials. | 01-22-2009 |
20090034925 | Optical Fibers and Optical Fiber Devices with Total Dispersion Greater than Material Dispersion - Disclosed are optical fiber devices incorporating optical fibers with total dispersion greater than material dispersion, and with preferred dispersion values less than +50 ps/nm-km. The desired dispersion values are obtained when light resides substantially in a single higher order mode (HOM) of the fiber, typically the LP | 02-05-2009 |
20090060434 | WAVEGUIDE DEVICE - A waveguide device includes a substrate and a first electrode, a first cladding layer, a waveguide, a second cladding layer, and a second electrode sequentially provided on the substrate. At least one of the first cladding layer, the waveguide, and second cladding layer includes a ligand compound which is capable of coordinating to a metal or metal ion. | 03-05-2009 |
20090060435 | Polarization maintaining and single polarization optical fiber - An optical fiber, comprising: (i) a core, (ii) a cladding surrounding the core, (iii) at least one stress member adjacent the fiber core and situated within the cladding, said stress member comprising silica co-doped with B and F. | 03-05-2009 |
20090080843 | Polarization Maintaining And Single Polarization Optical Fiber - An optical fiber, comprising: (i) a core having a core center and a radius or a width a, (ii) a cladding surrounding the core, and (iii) at least one stress member situated proximate to the fiber core within the cladding, said stress member comprising silica co-doped with F and at least one dopant selected from the list consisting of: GeO | 03-26-2009 |
20090097807 | Shaping a laser beam with a fiber-based device - A fiber-based device and associated method effectively convert a laser beam with an initial intensity distribution of Gaussian shape into a beam with another intensity distribution, which might typically be uniform or ring-shaped although other configurations are possible. The device comprises a single mode fiber with a core in which the beam is guided and a cladding surrounding the core. A component inline with the fiber couples a portion of the guided beam from the core into the cladding for propagation through the cladding toward an output end of the fiber. Interaction between core and cladding propagation modes produces the other intensity distribution at a predetermined distance from the output end of the fiber. | 04-16-2009 |
20090110355 | Strain-managed optical waveguide assemblies and methods of forming same - The strain-managed optical waveguide assemblies of the present invention utilize a large-mode-area (LMA) optical fiber that is annealed in a first bending such that the fiber in that configuration has substantially no axial strain. A fiber support member is then used to support the annealed LMA optical fiber in a second bending configuration that forms within the LMA optical fiber an axial strain profile that reduces stimulated Brillouin scattering (SBS) as compared to the first bending configuration, and that also preferably causes the LMA optical fiber to operate in a single mode. The LMA optical fiber may have a double-clad configuration and include a doped core that serves as a gain medium. The strain-managed optical waveguide assembly can then be used to constitute a fiber amplifier that mitigates the SBS penalty associated with high-power fiber-based optical systems. The strain-managed waveguide assembly can also provide for thermal management in high-power applications, and can be used to control SBS by controlling the temperature profile along the length of the LMA optical fiber in a manner that mitigates SBS. | 04-30-2009 |
20090116798 | OPTICAL GUIDE INCLUDING NANOPARTICLES AND MANUFACTURING METHOD FOR A PREFORM INTENDED TO BE SHAPED INTO SUCH AN OPTICAL GUIDE - The invention relates to an optical fibre comprising a gain medium which is equipped with: a core ( | 05-07-2009 |
20090116799 | MANUFACTURING METHOD OF OPTICAL WAVEGUIDE DEVICE AND OPTICAL WAVEGUIDE DEVICE OBTAINED THEREBY - A manufacturing method of an optical waveguide device which is capable of easily and precisely aligning the optical axis of a light receiving and emitting element and the optical axis of an optical waveguide and capable of shortening manufacturing time, and to provide an optical waveguide device obtained thereby. An under cladding layer | 05-07-2009 |
20090123120 | Stimulated raman scattering suppressing waveguide configuration - An apparatus in one example has: a fiber having a representative refractive index profile, the refractive index profile having at least a core and a pedestal; and the fiber having a modal index in the core that is greater than a modal index of the pedestal at a predetermined signal wavelength. The fiber may also have a cladding, and may have a significantly increased index of refraction over a cladding material of the cladding to reduce effects of Stimulated Raman Scattering. | 05-14-2009 |
20090129735 | OPTICAL FIBER HAVING REDUCED DEFECT DENSITY - An optical fiber comprising a multimode glass core having a diameter of at least 250 microns and an index of refraction and a polymer cladding having a thickness and contactingly surrounding a glass portion of the fiber so as to define an interface between the glass portion and the polymer cladding. The polymer cladding can have a first index of refraction that is less than the index of refraction. The fiber can comprise a density of less than 0.25 non-conforming regions having a diameter of 25 microns or greater per millimeter of length along the fiber, where each of the non-conforming regions is a region visible to the human eye under an optical microscope and having at least a portion thereof within a selected distance of the interface. The selected distance can be less than or equal to the thickness of the polymer cladding. The optical microscope can have a total magnification of about 200. The polymer cladding can be applied to at least a part of the optical fiber in at least a class 1000 environment. Methods of using optical fibers, including receiving with an optical fiber optical energy from a source and guiding the optical energy with the optical fiber, wherein the optical energy comprises at least one of 1) pulses each comprising a peak power of at least 10 kW, 2) an average power of at least 50 Watts, or 3) an average power density of at least 2.9 kW/cm | 05-21-2009 |
20090142025 | Method of Producing Planar Multimode Optical Waveguide Using Direct Photopatterning - Disclosed is a method of producing a planar multimode optical waveguide by direct photo-patterning and, more particularly, to an optical waveguide material and a method of producing the same. It is possible to control the refractive index of the optical waveguide, and the optical waveguide has a desirable refractive index distribution throughout different dielectric regions. In the method, it is unnecessary to conduct processes of forming a clad layer and of etching a core layer, thus a production process is simplified. The method comprises coating a photosensitive hybrid material having a refractive index or a volume changed by light radiation, in a thickness of 10 microns or more, and radiating light having a predetermined wavelength onto the coated photosensitive hybrid material to form the multimode optical waveguide due to a change in refractive index of a portion onto which light is radiated. | 06-04-2009 |
20090169161 | Method for Changing Refractive Index of an Optical Fiber by Applying a High Voltage Pulse to a Longitudinal Electrode - In one embodiment of the present invention, a method is disclosed of temporarily changing refractive index of an optical fiber containing a longitudinal electrode arranged in the cladding of said fiber along and parallel to the core of the fiber, wherein the change in refractive index is performed by applying a high voltage pulse to said longitudinal electrode, the high voltage pulse including a magnitude of at least 100 volts and a duration sufficiently short to prevent melting of the electrode, such that the electrode thermally expands through ohmic heating without melting and exerts a pressure on the fiber core to induce said temporary change of the refractive index. The method is suitably used for Q-switching a fiber laser. | 07-02-2009 |
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 |
20090220202 | PHOTONIC BANDGAP FIBER - A photonic bandgap optical fiber and a method of manufacturing said fiber is disclosed. The photonic bandgap fiber comprises a core region surrounded by cladding region. The cladding region includes a background optical material having a first refractive index, and elements of optical material having a second refractive index higher than said first refractive index. The elements are arranges periodically in the background optical material. At the drawing temperature of the fibered, the background optical material has a viscosity lower than the viscosity of the optical material of the elements. | 09-03-2009 |
20090245741 | OPTICAL WAVEGUIDE - The invention relates to an optical waveguide capable of extracting light especially from arbitrary positions of the same. An object of the invention is to provide an optical waveguide capable of extracting light efficiently from arbitrary positions of the same. To achieve the above object and according to one aspect of the invention, an optical waveguide is provided with a core for guiding light, a clad and a displacing structure for the core to contact the clad. The core has a first refractive index. The clad has a second refractive index higher than the first refractive index. | 10-01-2009 |
20090252468 | Optical fiber preform including a non-axisymmetric cross section - A method for manufacturing an optical fiber includes the steps of covering an outer periphery of a first glass ( | 10-08-2009 |
20090257725 | Preform for an optical fibre - The present invention provides a method of fabricating a preform (10) for a microstructured optical fibre. The method includes providing at least one hole forming element (13) in a mold. Each hole forming element (13) is elongate and is composed of a polymeric material that stretches and reduces in thickness upon application of a tensile stress (such as a nylon line). The method also includes forming the preform material (12) around, and contiguous, with an external surface portion of each hole forming element (13). The method further includes applying a tensile stress to a portion (14) of each hole forming element (13) to locally thin a zone (18) of each hole forming element (13), the thinning resulting in local detachment of the zone (18) from the preform material (10). A length of the detached zone (18) increases while the tensile stress is applied leaving a tubular portion in the preform material (12) where the hole forming element (13) was attached. | 10-15-2009 |
20100008633 | Segmented Gain-Doping Of An Optical Fiber - The present disclosure provides an approach to more efficiently amplify signals by matching either the gain materials or the pump profile with the signal profile for a higher-order mode (HOM) signal. By doing so, more efficient energy extraction is achieved. | 01-14-2010 |
20100014820 | Optical fibers and optical fiber devices with total dispersion greater than material dispersion - Disclosed are optical fiber devices incorporating optical fibers with total dispersion greater than material dispersion, and with preferred dispersion values less than +50 ps/nm-km. The desired dispersion values are obtained when light resides substantially in a single higher order mode (HOM) of the fiber, typically the LP | 01-21-2010 |
20100034504 | Melt Processible Semicrystalline Fluoropolymer Comprising Repeating Units Arising from Tetrafluoroethylene and a Hydrocarbon Monomer Having a Functional Group and a Polymerizable Carbon-Carbon Double Bond, and Multilayer Articles Therefrom - Disclosed is a melt processible semicrystalline fluoropolymer comprising: (a) about 0.001 to about 25 weight percent of repeating units arising from a hydrocarbon monomer having a functional group and a polymerizable carbon-carbon double bond, wherein said functional group is at least one selected from the group consisting of amine, amide, hydroxyl, phosphonate, sulfonate, nitrile, boronate and epoxidehydrocarbon monomer; and (b) the remaining weight percent of repeating units arising from tetrafluoroethylene. This melt processible semicrystalline fluoropolymer is impermeable to fuels and is useful as a lining for petroleum fuel tubing, as well as chemical resistance coating for, or adhesive between, perfluoropolymer and other polymers, metals and inorganics. | 02-11-2010 |
20100074584 | ELECTRO-OPTIC DEVICE AND METHOD FOR MAKING LOW RESISTIVITY HYBRID POLYMER CLADS FOR AN ELECTRO-OPTIC DEVICE - A low resistivity hybrid optical cladding may be formed from a sol-gel doped with an inorganic salt such as lithium perchlorate. An electro-optic device may be formed by poling an organic chromophore-loaded modulation layer through at least one layer of the low resistivity hybrid optical cladding. | 03-25-2010 |
20100080523 | DOPED OPTICAL FIBRE WITH BROKEN SPACE SYMMETRY - The invention relates to a micro-structured optical fibre ( | 04-01-2010 |
20100086271 | Ultra Low PMD Fibers and Method of Making - A method for making low PMD fiber comprising the steps of: (i) making an initial fiber preform; (ii) modifying said initial fiber preform to introduce higher birefringence than that of the initial fiber preform into modified preform; and (iii) drawing an optical fiber from the modified preform and bi-directionally spinning the drawn fiber during draw. | 04-08-2010 |
20100092141 | Silicon Photonic Fiber and Method of Manufacture - Methods of converting silica to silicon and fabricating silicon photonic crystal fiber (PCF) are disclosed. Silicon photonic crystal fibers made by the fabrication methods are also disclosed. One fabrication method includes: sealing silica PCF and a quantity of magnesium within a container, the quantity of magnesium defined by 2Mg( | 04-15-2010 |
20100092142 | Hermetic optical connection - A light-transmission assembly includes a hermetic optical connection having a housing with a housing side wall extending between opposed first and second housing ends. The housing is configured for sealable securement within a bulkhead bore through a bulkhead separating regions of relatively low and high fluid pressure and includes an interior surface defining a housing bore that extends between and through the first and second housing ends. Sealably bonded within the housing bore is a light-transmissive, rigid optical component having opposed first and second optical-component faces and an optical-component side wall extending between the optical-component faces. The assembly further includes at least a first flexible light conduit having opposed first and second light-conduit faces through which light can enter and exit the first flexible light conduit. The first light-conduit face of the first light conduit is retained in optical alignment with the first optical-component face. | 04-15-2010 |
20100129038 | OPTICAL TRANSMISSION APPARATUS - An optical transmission apparatus includes a light receiving element and an optical waveguide. The light receiving element receives light. The optical waveguide includes a core, a clad and a concave portion. The clad is adjacent to the core. The concave portion is formed in a portion of the core or a portion of the clad and diffuses the light. The portion of the core or the portion of the clad emits the light toward the light receiving element. | 05-27-2010 |
20100135626 | WAVEGUIDE HAVING A CLADDED CORE FOR GUIDING TERAHERTZ WAVES - A waveguide for guiding terahertz waves with wavelength ranging 0.1 mm-3 mm, includes a cladding tube made of a metal-free dielectric material, and a core filling a transmission space defined by the cladding tube. The core has a minimum width or diameter larger than the wavelength of the terahertz wave guided by the waveguide. The thickness of the cladding tube is smaller than the radius or one half of the width of the core. The core has an attenuation constant for the terahertz waves lower than that of the cladding tube. The waveguide guides terahertz waves mainly inside the core, and has a simple construction. | 06-03-2010 |
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 |
20100135628 | HOLEY FIBER - A holey fiber has at least: a core portion positioned at a center of the holey fiber; a cladding portion positioned around the core portion and including holes that are formed in layers around the core portion and that form a triangular lattice; d/Λ in a range of 0.43±0.03; Λ of 20 to 24 micrometers; a single-mode operation demonstrated at a wavelength of 1550 nanometers; and an effective core area equal to or larger than 500 μm | 06-03-2010 |
20100150506 | POLYMER OPTICAL WAVEGUIDE FORMING MATERIAL, POLYMER OPTICAL WAVEGUIDE AND MANUFACTURING METHOD OF POLYMER OPTICAL WAVEGUIDE - There are provided polymer optical waveguide forming material, a polymer optical waveguide and a manufacturing method of the polymer optical waveguide which reduces transmission loss with good processability. The polymer optical waveguide forming material is comprised of a polymer containing norbornene-based structural units including a hydroxy group; a photoacid generator for generating acid by irradiation of an actinic ray; and a monomer component polymerized by acid generated by said photoacid generator. | 06-17-2010 |
20100158459 | Long Lifetime Optical Fiber and Method - A fiber optic construction is described combining low OH (preferably <1 ppm) materials for use in the core and cladding elements with controlled D | 06-24-2010 |
20100183272 | OPTICAL FIBER - The present invention relates to an optical fiber having a structure to enable both prevention of resin coating combustion due to leaked light, and low-loss light transmission. The optical fiber comprises a core region, and a cladding region. The cladding region is constituted by an optical cladding which affects the transmission characteristics of light propagating in the core region, and a physical cladding which does not affect the transmission characteristics of light propagating in the core region. Particularly, a leakage reduction portion is provided in the physical cladding so as to surround an outer periphery of the core region through the optical cladding. The leakage reduction portion functions to suppress propagation of the leaked light propagating from the core region toward outside the cladding region. | 07-22-2010 |
20100189397 | Single-Mode Optical Fiber - An optical fiber includes a central core, which has a radius r | 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 |
20100215329 | Large Effective Area Low Attenuation Optical Fiber - Optical waveguide fiber that has large effective area and low loss characteristics, such as low attenuation and low bend loss. The optical waveguide fiber includes a dual trench design wherein an annular region closer to the core is preferably doped with at least one downdopant such as fluorine, which annular region is surrounded by another annular region that preferably includes closed, randomly dispersed voids. | 08-26-2010 |
20100220965 | OPTICAL FIBER STRUCTURE AND A METHOD OF PRODUCING THEREOF - An optical waveguide including a core, a buffer surrounding the core, and a cladding surrounding the buffer. The core, the buffer and the cladding include silica glass. A refractive index of the buffer is substantially equal to a refractive index of pure amorphous silica glass. The buffer may reduce bubble formation during manufacturing and may facilitate splicing of the waveguide. A numerical aperture of the waveguide may be fine-tuned by adjusting a radial dimension of the buffer in order to compensate variations in the refractive index of the core. | 09-02-2010 |
20100232754 | Method of making a low PMD optical fiber - A method of making an optical fiber includes the steps of: providing an optical fiber preform; heating an end portion of the optical fiber preform so as to obtain a softened preform end portion; drawing the softened preform end portion to form the optical fiber; applying to the optical fiber a substantially sinusoidal spin having a spin amplitude and a spin period, the substantially sinusoidal spin being transmitted to the softened preform end portion, and determining an actual spin amplitude applied to the fiber, wherein the actual spin amplitude is the spin amplitude applied in correspondence to the softened preform end portion. The spin amplitude and spin period of the substantially sinusoidal spin are selected in such a way that a ratio of the actual spin amplitude to the spin period is in the range of approximately 0.8 to approximately 1.4 turns/m | 09-16-2010 |
20100239217 | OPTICAL FIBER AND OPTICAL WAVEGUIDE - An optical fiber includes a core region having a first refractive index and a cladding region having a second refractive index lower than the first refractive index on an outer circumference of the core region. The cladding region includes four holes formed to have a four-fold rotational symmetry with respect to a center axis around the core region in a longitudinal direction, such that a zero-dispersion wavelength is 900 nm to 1150 nm and a cutoff wavelength is equal to or shorter than 950 nm. | 09-23-2010 |
20100247046 | WIDE BANDWIDTH, LOW LOSS PHOTONIC BANDGAP FIBERS - Various embodiments described herein comprise hollow core (HC) photonic bandgap fibers (PBGF) with a square lattice (SQL). In various embodiments the, HC SQL PBGF includes a cladding region comprising 2-10 layers of air-holes. In various embodiments, the HC SQL PBGF can be configured to provide a relative wavelength transmission window Δλ/λc larger than about 0.35 and minimum transmission loss in a range from about 70 dB/km to about 0.1 dB/km. In some embodiments, the HC SQL PBGF fiber can be a polarization maintaining fiber. Methods of fabricating such fibers are also disclosed herein along with some examples of fabricated fibers. Various applications of such fibers are also described herein. | 09-30-2010 |
20100254669 | PHOTONIC BANDGAP FIBER - A photonic bandgap fiber of the present invention functions as a polarization maintaining fiber, and includes: a core made from a solid material; a cladding provided around the core; a periodic structure region which is provided in a part of the cladding in a vicinity of the core and in which a plurality of high refractive index parts with a refractive index higher than that of the cladding are arranged in a periodic structure; a low refractive index region which is provided in another part of the cladding in a vicinity of the core and has an average refractive index lower than that of the core; and stress applying parts which are provided in a part of the low refractive index region close to the periodic structure region and have a thermal expansion coefficient different from that of another part of the low refractive index region. | 10-07-2010 |
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 |
20100310219 | Microstructured Transmission Optical Fiber - A microstructured optical fiber for transmitting optical signals comprised of light, the optical fiber comprising:
| 12-09-2010 |
20100316341 | OPTICAL WAVEGUIDE-TYPE WAVELENGTH DISPERSION COMPENSATION DEVICE AND MANUFACTURING METHOD THEREOF - The optical waveguide-type wavelength dispersion compensation device of the present invention has an optical waveguide as a reflection-type wavelength dispersion compensation device. The equivalent refractive index of a core changes unevenly along a light propagation direction by changing physical dimensions of the core that is embedded in a cladding. The core is designed by (a) setting a first desired reflection spectrum, ignoring transmission losses of the optical waveguide, and designing an optical waveguide that is capable of compensating the wavelength dispersion of an optical fiber to be compensated; (b) deriving a wavelength dependency characteristic of a transmission loss amount of the optical waveguide from an effective length of the optical waveguide designed in process (a); and (c) adding a reverse dependency characteristic of the wavelength dependency characteristic to the first reflection spectrum to correct it to a second reflection spectrum, and redesigning an equivalent refractive index distribution of the optical waveguide designed in the process (a) by using this second reflection spectrum. | 12-16-2010 |
20100322575 | SINGLE MODE PROPAGATION IN FIBERS AND RODS WITH LARGE LEAKAGE CHANNELS - Various embodiments include large cores fibers that can propagate few modes or a single mode while introducing loss to higher order modes. Some of these fibers are holey fibers that comprising cladding features such as air-holes. Additional embodiments described herein include holey rods. The rods and fibers may be used in many optical systems including optical amplification systems, lasers, short pulse generators, Q-switched lasers, etc. and may be used for example for micromachining. | 12-23-2010 |
20100329616 | PHOTOSENSITIVE RESIN COMPOSITION, METHOD FOR CONTROL OF REFRACTIVE INDEX, AND OPTICAL WAVEGUIDE AND OPTICAL COMPONENT USING THE SAME - Provided are: a resin composition for the formation of an optical waveguide, which shows low transmission loss and high heat stability and enables to form a waveguide pattern at high shape accuracy and at low cost; an optical waveguide; a method of forming an optical waveguide; and an optical element using the method. A photosensitive resin composition is used, which includes a polyamic acid represented by a general formula (I) or a polyamic acid ester (A), a compound (B) having an epoxy group, and a compound (C) which generates an acid by being exposed to light. | 12-30-2010 |
20100329617 | RADIATION-CURABLE COATING COMPOSITION - The invention relates to a radiation-curable primary coating composition comprising 0.6-10 vol % of particles which when cured has an equilibrium modulus of about 1.5 MPa or less, and a cavitation strength at which a tenth cavity appears (α | 12-30-2010 |
20110002589 | Light guide strip structure - A light guide strip structure with neon effect, which is manufactured at lower cost and can be used with the bright-and-dark stripes or diffraction and interference between the light rays minimized. The light guide strip structure includes a transparent main body having a light-scattering surface and a color band disposed in the main body. The color band has a reflective index greater than that of the main body, whereby most of the light is reflected back to the main body and only a minor part of the light enters the color band to create neon effect. The light entering the main body substantially travels along an axis thereof. The light is refracted and reflected between the main body and the color band and scattered from the surface of the main body to enhance brightness and overcome the problem of vagueness. | 01-06-2011 |
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 |
20110085769 | WIDE BANDWIDTH, LOW LOSS PHOTONIC BANDGAP FIBERS - Various embodiments include photonic bandgap fibers (PBGF). Some PBGF embodiments have a hollow core (HC) and may have a square lattice (SQL). In various embodiments, SQL PBGF can have a cladding region including 2-10 layers of air-holes. In various embodiments, an HC SQL PBGF can be configured to provide a relative wavelength transmission window Δλ/λc larger than about 0.35 and a minimum transmission loss in a range from about 70 dB/km to about 0.1 dB/km. In some embodiments, the HC SQL PBGF can be a polarization maintaining fiber. Methods of fabricating PBGF are also disclosed along with some examples of fabricated fibers. Various applications of PBGF are also described. | 04-14-2011 |
20110085770 | SINGLE MODE OPTICAL FIBER WITH DEPRESSED TRENCH - An optical fiber having a core and an outer cladding, the core including from its center outward a central core having a radius and a refractive index difference with respect to the outer cladding, and a depressed inner cladding. The depressed inner cladding includes at least a first portion having a radius and a refractive index difference with respect to the outer cladding, the first portion preferably being adjacent to the central core, and a second portion adjacent to the first portion constituting a depressed trench having a radius, and a refractive index difference with respect to the outer cladding. The first portion of the inner cladding has a refractive index below the refractive index of the outer cladding, and the depressed trench has a refractive index that is lower than the refractive index of the first portion of the depressed inner cladding. The outer radius of the depressed inner cladding of the optical fiber is between 28 μm and 40 μm, the LP | 04-14-2011 |
20110103756 | OPTICAL FIBER SYSTEMS AND METHODS - One embodiment of the invention includes a method for forming an optical fiber. The method comprises providing a preform having a core material and a glass cladding material surrounding the core material. The method also comprises drawing the preform at a temperature that is greater than a melting temperature of the core material to form a drawn fiber. The method further comprises cooling the drawn fiber to form the optical fiber having a crystalline fiber core and a cladding that surrounds the crystalline fiber core and extends axially along a length of the crystalline fiber core. | 05-05-2011 |
20110135260 | OPTICAL FIBER - An optical fiber includes a core ( | 06-09-2011 |
20110135261 | OPTICAL WAVEGUIDE, OPTICAL WAVEGUIDE MODULE AND METHOD FOR FORMING OPTICAL WAVEGUIDE - An optical waveguide comprising a core and a clad characterized in that a desired part is heated and transited to machining strain release state, the part transited to the machining strain release state is curved with a specified bending radius and transited to machining strain state. That part of the optical waveguide is heated to a temperature within a range between the bending point and softening point and transited to machining strain state. The optical waveguide is an optical fiber having the outer diameter not shorter than 50 μm. The optical waveguide has the outer diameter not shorter than ten times of the mode field diameter of the optical waveguide. The optical waveguide has a bending radius of 5.0 mm or less and difference equivalent of refractive index &Dgr; | 06-09-2011 |
20110150404 | OPTICAL FIBER COATING WITH A COLOR CONCENTRATE HAVING SLICKNESS ADDITIVE - Certain embodiments of the invention may include systems and methods for coating an optical fiber. The method includes coating an optical fiber with a primary coating, preparing a secondary coating by selectively mixing a concentrate with an ultraviolet (UV) curable diluent coating, wherein the concentrate comprises predetermined amounts of a color agent and a release agent, and applying the secondary coating to the optical fiber and primary coating. | 06-23-2011 |
20110150405 | METHOD OF MANUFACTURING OPTICAL WAVEGUIDE, OPTICAL WAVEGUIDE AND OPTICAL TRANSMISSION DEVICE - A method for manufacturing an optical waveguide which includes a core configured to transmit an optical signal, and a mirror portion configured to reflect the optical signal, the method includes: forming a mask layer patterned in a predetermined shape, on a first crystal plane of a substrate made of a crystalline material; etching the first crystal plane by a wet-etching using the mask layer to form a groove having a plurality of crystal planes; providing a metallic reflection film on at least one of the plurality of crystal planes to form the mirror portion; and providing the groove with a core material to form the core. | 06-23-2011 |
20110158595 | RARE-EARTH-DOPED FIBER OPTIC WAVEGUIDE AND OPTICAL DEVICE COMPRISING IT - The invention relates to an optical waveguide, in particular an optical fibre comprising a core, formed from a material based on rare-earth-ion-doped silica, covered by an optical cladding. Nanoparticles, at least some of which are metal nanoparticles, are dispersed in the material of the core. The optical devices, such as especially optical amplifiers, comprise an optical fibre having a core formed, from a material based on rare-earth-ion-doped silica covered with an optical cladding, nanoparticles, at least some of which are metal nanoparticles, being dispersed in the material of the core, and a pumping source delivering electromagnetic excitation radiation, which propagates in the core. | 06-30-2011 |
20110182555 | LIQUID RESIN COMPOSITION FOR PRODUCTION OF OPTICAL WAVEGUIDE, OPTICAL WAVEGUIDE PRODUCED BY USING THE LIQUID RESIN COMPOSITION, AND PRODUCTION METHOD OF THE OPTICAL WAVEGUIDE - A liquid resin composition is provided which satisfies both a tackiness-free requirement and a curing sensitivity requirement for production of an optical waveguide by a roll-to-roll process. An optical waveguide produced by using the liquid resin composition and a production method of the optical waveguide are also provided. The liquid resin composition for the production of the optical waveguide comprises:
| 07-28-2011 |
20110182556 | PLASTIC-CLADDING OPTICAL FIBER - A plastic-cladding optical fiber is provided. The plastic-cladding optical fiber is provided includes: a core layer made of quartz glass; and a cladding layer formed by hardening a curable resin composition over a periphery of the core layer. Adhesion between the core layer and the cladding layer ranges 1.5 g/mm to 4.0 g/mm. | 07-28-2011 |
20110188822 | OPTICAL FIBER COATINGS FOR REDUCING MICROBEND LOSSES - Certain embodiments of the invention may include systems and methods for providing optical fiber coatings to reduce microbend losses. According to an example embodiment of the invention, a method is provided for coating an optical fiber to reduce microbend losses and polarization mode dispersion (PMD). The method includes applying a primary layer to the optical fiber, wherein the optical fiber comprises a core region surrounded by a cladding region. The method includes applying a secondary layer to the primary layer, and curing the primary and secondary layers, wherein the cured primary layer adheres to the cladding region with a minimum pullout adhesion of 6 N/cm, and the cured secondary layer has an in situ modulus of about 700 MPa to about 1200 MPa at room temperature. | 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 |
20110194826 | PHOTONIC CRYSTAL FIBER - Provided is a photonic crystal fiber capable of fusion-splicing with an ordinary optical fiber at low splicing loss and having a core region and a cladding region that surrounds the core region, wherein the cladding region is structured such that high refractive index sub-regions are periodically arranged in a two-dimensional periodic structure in the low refractive index background sub-region at a cross-section perpendicular to the fiber axis, and wherein the refractive index of the core region is higher than the refractive index of the low refractive index background sub-region. The refractive index profile of the photonic crystal fiber is uniform along the fiber axis. The effective refractive index of the core guided mode may be higher than the refractive index of the low refractive index background sub-region. | 08-11-2011 |
20110211795 | HERMETICALLY SEALED FIBER SENSING CABLE - In one aspect, the present invention provides a hermetically sealed fiber sensing cable comprising: a core fiber comprising at least one Bragg grating region, an outer surface and a length; a fiber cladding in contact with the core fiber along the entire length of the core fiber, the fiber cladding having an outer surface and a length; a carbon layer disposed upon the outer surface of the fiber cladding along the entire length of the fiber cladding, the carbon layer comprising diamond-like carbon; a hydrogen ion absorption layer in contact with the carbon layer, the hydrogen ion absorption layer being disposed on the outer surface of the carbon layer; and an outer sleeve. Also provided in another aspect of the present invention, is a component for a hermetically sealed fiber sensing cable. | 09-01-2011 |
20110243516 | OPTICAL WAVEGUIDE DEVICE, ELECTRONIC DEVICE, AND MANUFACTURING METHOD OF OPTICAL WAVEGUIDE DEVICE - An optical waveguide device includes optical waveguide wiring in which an optical waveguide crosses, and a relay part arranged at a crossing part of the optical waveguide and having a refractive index higher than that of a core of the optical waveguide. | 10-06-2011 |
20110243517 | UNCOUPLED MULTI-CORE FIBER - A multi-core fiber of the present invention employs the multi-core fiber mode, which corresponds to the “uncoupled” operation aspect in which individual cores are used independently for single-mode transmission, to perform space division multiplexing transmission using a multi-core fiber in which multiple single-mode cores are stored in one optical fiber. More specifically, the multi-core fiber of the present invention forms an uncoupled multi-core fiber that makes individual cores correspond to single-mode, independent transmission channels. | 10-06-2011 |
20110262090 | SINGLE-POLARIZATION FIBER - Embodiments of the invention relate to a single-polarization fiber that may include a W-type refractive-index profile having a depressed region along an unguided principal axis of the fiber, and a quasi step-index profile along a guided principal axis of the fiber. The quasi step-index profile may have a depressed region with a radial extent at least twice that of the depressed region along the unguided axis. | 10-27-2011 |
20110274397 | TIGHT-BUFFERED OPTICAL FIBER HAVING IMPROVED FIBER ACCESS - Certain embodiments of the invention may include systems and methods for providing tight-buffered optical fiber having improved fiber access. According to an example embodiment of the invention, a method for making a tight buffer upcoated optical fiber having a predetermined buffer stripping force is provided. The method includes controlling residual acrylate unsaturation (RAU) and oxygen in at least an outer surface of un-buffered optical fiber to achieve a predetermined buffer stripping characteristic, applying a tight buffer composition comprising acrylate to the un-buffered optical fiber, and curing the tight buffer composition. | 11-10-2011 |
20110280531 | RESIN COMPOSITION FOR PRODUCTION OF OPTICAL WAVEGUIDE, AND OPTICAL WAVEGUIDE PRODUCED BY USING THE RESIN COMPOSITION - A resin composition is provided, which satisfies both an uncured layer flexibility requirement and a patterning resolution requirement for production of an optical waveguide by a roll-to-roll process. An optical waveguide produced by using the resin composition is also provided. The resin composition comprises: (A) an aromatic multifunctional epoxy polymer having a weight average molecular weight (Mw) of 500 to 5000; (B) an aromatic multifunctional epoxy polymer having a weight average molecular weight (Mw) of 10000 to 50000; (C) at least one of monofunctional, difunctional and trifunctional liquid aromatic epoxy monomers; and (D) a photoacid generator; wherein the components (A), (B) and (C) are present in proportions of 80 to 90 parts by weight, 5 to 15 parts by weight, and 1 to 10 parts by weight, respectively, based on a total of 100 parts by weight of the components (A), (B) and (C). | 11-17-2011 |
20110280532 | Optical fiber manufacturing method and optical fiber - The present invention relates to, for example, a method of easily manufacturing an optical fiber having any refractive index profile with fewer kinds of rods, and an optical fiber is manufactured by preparing a plurality of rods including at least two kinds of rods having different refractive indexes from each other, bundling rods selected from the plurality of rods to construct two or more rod units, producing a preform including a region in which the two or more rod units are combined so as to have a cross-sectional shape having rotational symmetry of order 2 or more, and manufacturing an optical fiber by drawing the preform. | 11-17-2011 |
20110286709 | Method and System for Edge Cladding of Laser Gain Media - A gain medium operable to amplify light at a gain wavelength and having reduced transverse ASE includes an input surface and an output surface opposing the input surface. The gain medium also includes a central region including gain material and extending between the input surface and the output surface along a longitudinal optical axis of the gain medium. The gain medium further includes an edge cladding region surrounding the central region and extending between the input surface and the output surface along the longitudinal optical axis of the gain medium. The edge cladding region includes the gain material and a dopant operable to absorb light at the gain wavelength. | 11-24-2011 |
20120002931 | OPTICAL WAVEGUIDE DEVICE AND METHOD OF MANUFACTURING THEREOF - In an optical waveguide device of the present invention, optical element mount ( | 01-05-2012 |
20120014653 | MANUFACTURING METHOD FOR OPTICAL FIBER PREFORM AND OPTICAL FIBER - Provided is a manufacturing method for an optical fiber preform of which the core is doped with a rare earth element. The method includes: depositing glass particles within a silica tube by the modified chemical vapor deposition method, the glass particles mainly consisting of silicon dioxide; adding the rare earth element and aluminum to the glass particles within the silica tube by the solution doping method; heating the silica tube while flowing a phosphorous-containing gas into the silica tube to sinter the glass particles within the silica tube while adding the phosphorous; and heating and collapsing the silica tube to which the rare earth element, the aluminum, and the phosphorous are added. | 01-19-2012 |
20120027369 | GI TYPE OPTICAL FIBER AND METHOD FOR MANUFACTURING SAME - A GI type optical fiber of the present invention is a GI type optical fiber having a core component and a cladding component disposed around the outer periphery of the core component, the core component includes a polymer containing at least 55 wt % chlorostyrene monomer and a dopant, and the cladding component includes a polymer of a monomer containing at least 35 wt % methyl methacrylate. It is an object of the present invention to provide a GI type optical fiber in which chlorostyrene is used as the predominant component of the monomer that constitutes the core component, and therefore has excellent transparency and good flexibility, and allows high-speed communication. | 02-02-2012 |
20120039576 | OPTICAL WAVEGUIDE WITH EMBEDDED LIGHT-REFLECTING FEATURE AND METHOD FOR FABRICATING THE SAME - A method for fabricating an optical waveguide includes setting, on a lower cladding of an optical waveguide, a light-reflecting feature and at least one waveguide core distinct from the reflecting feature. An upper cladding is applied that embeds both the light-reflecting feature and the waveguide core. | 02-16-2012 |
20120063733 | OPTICAL FIBER, IN PARTICULAR A LASER FIBER CONTAINING A DOPED GLASS FIBER CORE AND CLADDING AROUND THE FIBERGLASS CORE - The invention relates to an optical fiber, in particular a laser fiber, containing a doped glass fiber core ( | 03-15-2012 |
20120093469 | ULTRA HIGH NUMERICAL APERTURE OPTICAL FIBERS - Various embodiments described include optical fiber designs and fabrication processes for ultra high numerical aperture optical fibers (UHNAF) having a numerical aperture (NA) of about 1. Various embodiments of UHNAF may have an NA greater than about 0.7, greater than about 0.8, greater than about 0.9, or greater than about 0.95. Embodiments of UHNAF may have a small core diameter and may have low transmission loss. Embodiments of UHNAF having a sufficiently small core diameter provide single mode operation. Some embodiments have a low V number, for example, less than 2.4 and large dispersion. Some embodiments of UHNAF have extremely large negative dispersion, for example, less than about −300 ps/nm/km in some embodiments. Systems and apparatus using UHNAF are also disclosed. | 04-19-2012 |
20120093470 | OPTICAL FIBER WITH SINGLE COATING - An optical fiber includes a glass core and a protective coating consisting of a single coating layer disposed to surround the glass core, wherein the single coating layer is formed from a cured polymeric material obtained by curing a radiation curable composition including: (i) a radiation curable urethane(meth)acrylate oligomer, preferably including a backbone derived from polyoxytetramethylene glycol, (ii) at least one monofunctional reactive monomer, (iii) at least one multifunctional reactive monomer, and (iv) an adhesion promoter. | 04-19-2012 |
20120106908 | OPTICAL FIBER - A optical fiber ( | 05-03-2012 |
20120114291 | OPTICAL FIBER AND METHOD FOR MANUFACTURING SAME - [Object] The present invention has the object of providing an optical fiber enabling high-speed communication, that exhibits superior transparency and excellent flexibility, and that includes trichloroethyl methacrylate as a main component of the core portion monomer. | 05-10-2012 |
20120121226 | INTERLOCKING OPTICAL FIBER - An optical fiber includes an outer periphery formed into a shape that configures the fiber to interlock with the other fibers with complementary shapes. Methods and systems for fabricating such interlocking fibers are also disclosed. In one example, a method includes drawing a first optical fiber from a preform and forming an outer periphery of the first optical fiber into a shape that configures the first optical fiber to be interlocked with a second optical fiber comprising an outer periphery formed into a shape that is complementary to the shape of the first optical fiber. | 05-17-2012 |
20120134636 | HOLEY FIBER - A holey fiber includes a core portion located at a center of the holey fiber, and a cladding portion located around the core portion, the cladding portion having holes formed in layers around the core portion. The holes are arranged so as to form a triangular lattice while d/Λ is within a range of 0.33 to 0.43, Λ is within a range of 10.5 micrometers to 15 micrometers when a hole diameter is d in micrometer and a lattice constant of the triangular lattice is Λ in micrometer, and in a wavelength of 1550 nanometer, an effective core-area is equal to or greater than 130 μm | 05-31-2012 |
20120148206 | Rare-Earth-Doped Optical Fiber - An optical fiber includes a central core and an optical cladding. The central core includes a core matrix surrounding nanoparticles. The nanoparticles include rare earths, a nanoparticle matrix, and an outer layer. The nanoparticle matrix surrounds the rare earths, and the outer layer surrounds the nanoparticle matrix. The atomic ratio of nanoparticle matrix atoms other than oxygen to rare earth atoms is typically between about 300 and 1,000. The outer layer, which typically has a thickness of between about 1 nanometer and 2 nanometers, includes an outer layer matrix that is substantially free from rare earths. | 06-14-2012 |
20120155818 | OPTICAL FIBER WITH SINGLE LAYER COATING FOR FIELD TERMINATION - A structure for optical fiber with single layer coating suitable for field termination process is provided, including a glass core, a cladding layer, and a permanent coating protective layer. The thickness of the permanent coating ranges preferably from about 4 um to 8 um, and remains on the optical fiber during the field termination process to provide protection to the optical fiber after the buffer layer is striped off. In addition, the optical fiber structure of the present invention still conforms to the specification of the standard optical fiber. The optical fiber of the structure according to the present invention can simplify the field termination process so that the quality efficiency of the deployment is improved. | 06-21-2012 |
20120155819 | RESIN COMPOSITION FOR OPTICAL WAVEGUIDE, OPTICAL WAVEGUIDE PRODUCED BY USING THE RESIN COMPOSITION, AND PRODUCTION METHOD OF THE OPTICAL WAVEGUIDE - A resin composition for an optical waveguide is provided, which has excellent adhesiveness to a cladding layer of the optical waveguide and excellent patternability for formation of a core portion of the optical waveguide and reduces the optical waveguide loss. An optical waveguide produced by using the resin composition is also provided. The resin composition comprises: (A) a multifunctional partially-acrylated epoxy resin, as a major component, having an epoxy group and a (meth)acrylate group in the same main chain thereof; and (B) a photopolymerization initiator as a curing component. The optical waveguide includes: a substrate; a cladding layer provided on the substrate; and a core portion provided on the cladding layer for transmission of an optical signal; wherein the core portion is formed from the resin composition. | 06-21-2012 |
20120170901 | OPTICAL FIBER END PROCESSING METHOD AND OPTICAL FIBER END PROCESSING APPARATUS AND OPTICAL FIBER END - An optical fiber end processing method includes fixing two portions of an optical fiber, heating and fusing the optical fiber between the two fixed portions, to form a first heat fusion region, heating and fusing the optical fiber fixed between the two fixed portions unit while fixing the two fixed portions, moving a heat fusion unit from a side of the first heat fusion region toward a base end side of the optical fiber, and pushing a heat fusion portion of the optical fiber in a direction of shortening a length of the heat fusion portion, to form a second heat fusion region continuous to the first heat fusion region and in which the air holes of the optical fiber disappear; and removing the first heat fusion region by cutting the optical fiber within the second heat fusion region after the second heat fusion forming. | 07-05-2012 |
20120201502 | SIDE PUMP FIBER, METHOD OF MAKING SAME, AND OPTICAL DEVICES USING SAME - A side pump fiber and a method of making a side pump fiber are provided. A plurality of pump fibers can be joined to a side of a signal fiber, at different locations. The method includes creating a lengthwise, tapered, concave pocket cut in a pump (or side pump) fiber, inserting the signal fiber in the pocket cut, and then coupling the side pump fiber to the center fiber at the pocket cut. Optical amplifiers and lasers, as examples, can be made using the above method and side pump fibers. | 08-09-2012 |
20120243842 | Plastic Optical Fiber Comprising Cyclic Block Copolymer - Plastic optical fibers or plastic optical fiber cores with good high temperature resistance to optical attenuation loss are prepared from a cyclic block copolymer characterized by a: A. Weight ratio of hydrogenated conjugated diene polymer block to hydrogenated vinyl aromatic polymer block of 35:65 to 10:90; B. Number average molecular weight (Mn) of from 40,000 to 150,000, grams per mole (g/mol); and C. Hydrogenation level such that each hydrogenated vinyl aromatic polymer block and each hydrogenated conjugated diene polymer block has a hydrogenation level of at least 95 percent. | 09-27-2012 |
20120294575 | LOW BEND LOSS OPTICAL FIBER - An optical fiber includes a central glass core region comprising maximum refractive index delta percent Δ | 11-22-2012 |
20120321260 | OPTICAL WAVEGUIDES HAVING FLATTENED HIGH ORDER MODES - A deterministic methodology is provided for designing optical fibers that support field-flattened, ring-like higher order modes. The effective and group indices of its modes can be tuned by adjusting the widths of the guide's field-flattened layers or the average index of certain groups of layers. The approach outlined here provides a path to designing fibers that simultaneously have large mode areas and large separations between the propagation constants of its modes. | 12-20-2012 |
20120321261 | METHOD FOR PRODUCING OPTICAL FIBER - There is provided a method for producing an optical fiber having low attenuation, the optical fiber including a core that contains an alkali metal element. An optical fiber preform that includes a core part and a cladding part is drawn with a drawing apparatus to form an optical fiber, the core part having an average concentration of an alkali metal element of 5 atomic ppm or more. During the drawing, the time the temperature of glass is maintained at 1500° C. or higher is 110 minutes or less. The drawing speed is preferably 1200 m/min or more and more preferably 1500 m/min to 2300 m/min. The optical fiber preform preferably has a diameter of 70 mm to 170 mm and more preferably 90 mm to 150 mm. | 12-20-2012 |
20120321262 | PHOTONIC CRYSTAL FIBERS HAVING A PREFERRED BENDING PLANE AND SYSTEMS THAT USE SUCH FIBERS - In general, in a first aspect the invention features photonic crystal fibers that include a core extending along a waveguide axis, a confinement region extending along the waveguide axis surrounding the core, and a cladding extending along the waveguide axis surrounding the confinement region, wherein the cladding has an asymmetric cross-section. | 12-20-2012 |
20120328254 | OPTICAL FIBER AND METHOD AND APPARATUS FOR MANUFACTURING OPTICAL FIBER - An optical fiber including an optical fiber wire is provided. The optical fiber wire has a bare optical fiber portion, to which first elastic torsion is applied, and a coating layer, which coats the bare optical fiber portion and which is formed of curable resin and generates elastic repulsion against resilience occurring in the bare optical fiber portion so that the first elastic torsion applied to the bare optical fiber portion is held. Second elastic torsion is applied to the entire optical fiber configured to include the bare optical fiber portion and the coating layer. | 12-27-2012 |
20130011107 | METHOD FOR MANUFACTURING A PREFORM AND PREFORM FOR DRAWING A MICROSTRUCTURED OPTICAL FIBER - In a method for manufacturing a preform for drawing a microstructured optical fiber, a core element and multiple sub-elements are arranged extending along the perform. The sub-elements and the core element form a bundle, which is twisted by a specified angle about the longitudinal axis of the bundle, wherein the pattern formed by the cross section of the sub-elements and the cross section of the core element is preserved along a length of the perform. The sub-elements and the core elements are subsequently at least partially fused together by heating the material of which the core element and the sub elements are made of above the transformation point of the material, so as to at least partially eliminate the cavities between the sub-elements, between the sub-elements and the core element, and between the sub-elements and the casing. | 01-10-2013 |
20130022326 | OPTICAL FIBER, AND LASER DEVICE USING THE SAME - The invention aims to provide an optical fiber in which light that is input to the clad is easily released to the outside of the clad, and a laser device using the optical fiber. An optical fiber ( | 01-24-2013 |
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 |
20130051746 | OPTICAL WAVEGUIDE, OPTICAL TRANSMISSION MODULE, AND ELECTRONIC DEVICE - An optical waveguide has a clad, a core surrounded by the clad and having an index of refraction larger than an index of refraction of the clad, an incident end face that makes light enter the core; and an exiting end face that makes light exit from the core. Two side faces of the optical waveguide are formed so as to have an angle change. The two side faces are translationally symmetric with each other, or two side faces excluding a portion of the side faces are translationally symmetric with each other. | 02-28-2013 |
20130064513 | OPTICAL FIBER - An optical fiber has a plurality of holes in a cladding around a core, and has a high failure strength and small transmission loss. The core is made of glass. The cladding surrounds the core, and the holes are formed in the cladding so as to extend along a central axis of the fiber. The holes are formed with constant intervals therebetween along a circle centered on the core, and each hole has a substantially circular cross section. The cladding is sectioned into two claddings. A residual stress in an inner region that is inside a circumcircle of the holes is a compressive stress. | 03-14-2013 |
20130071078 | DUAL COATED OPTICAL FIBERS AND METHODS FOR FORMING THE SAME - Dual coated optical fibers and methods for forming dual coated optical fibers are disclosed herein. The dual coated optical fibers include a glass fiber comprising a core region, a cladding region and a dual coating layer surrounding the glass fiber. The dual coating layer includes an inner coating and an outer coating. The inner coating surrounds the glass fiber and includes a first polyimide material. In one embodiment the first polyimide material also includes an adhesion promoter. The outer coating surrounds and is in direct contact with the inner coating and includes a second polyimide material having a decomposition threshold temperature greater than the first polyimide material. The second polyimide material may also have a modulus of elasticity greater than the first polyimide material and a moisture uptake lower than the first polyimide material. | 03-21-2013 |
20130077925 | OPTICAL FIBER - An optical fiber includes a core section and a cladding section. A k value expressed by k=4Aeff/(πMFD | 03-28-2013 |
20130089296 | MULTI-MODE OPTICAL FIBER - The present invention relates to a multi-mode optical fiber having a structure enabling stable production and broadening of communication bandwidth as compared with the conventional structures. The multi-mode optical fiber has a core with a diameter | 04-11-2013 |
20130108230 | BUFFERED FIBERS WITH ACCESS FEATURES | 05-02-2013 |
20130114933 | ULTRA HIGH NUMERICAL APERTURE OPTICAL FIBERS - Various embodiments described include optical fiber designs and fabrication processes for ultra high numerical aperture optical fibers (UHNAF) having a numerical aperture (NA) of about 1. Various embodiments of UHNAF may have an NA greater than about 0.7, greater than about 0.8, greater than about 0.9, or greater than about 0.95. Embodiments of UHNAF may have a small core diameter and may have low transmission loss. Embodiments of UHNAF having a sufficiently small core diameter provide single mode operation. Some embodiments have a low V number, for example, less than 2.4 and large dispersion. Some embodiments of UHNAF have extremely large negative dispersion, for example, less than about −300 ps/nm/km in some embodiments. Systems and apparatus using UHNAF are also disclosed. | 05-09-2013 |
20130121655 | BEND-RESISTANT SINGLE-MODE OPTICAL FIBRE - A single-mode optical fibre for transmitting optical signals includes a central core region for guiding the optical signals, and a cladding region surrounding the core region and including a void-containing annular layer containing randomly distributed voids, wherein the void-containing layer is doped with fluorine at a concentration of less than 1 wt % and has a radial thickness equal to or smaller than 3 μm. | 05-16-2013 |
20130129291 | MULTI-MODE OPTICAL FIBER - The present invention relates to a multi-mode optical fiber having a structure which can be produced with good stability with a communication bandwidth broader than that in the conventional structures, and in which both GeO | 05-23-2013 |
20130156391 | UNIFORM WHITE COLOR LIGHT DIFFUSING FIBER - Light diffusing optical fibers for use in illumination applications and which have a uniform color gradient that is angularly independent are disclosed herein along with methods for making such fibers. The light diffusing fibers are composed of a silica-based glass core that is coated with a number of layers including both a scattering layer and a phosphor layer. | 06-20-2013 |
20130156392 | UNIFORM UV EFFICIENT LIGHT DIFFUSING FIBER - Light diffusing optical fibers for use in ultraviolet illumination applications and which have a uniform color gradient that is angularly independent are disclosed herein along with methods for making such fibers. The light diffusing fibers are composed of a silica-based glass core that is coated with a number of layers including a scattering layer. | 06-20-2013 |
20130202264 | WAVEGUIDES HAVING PATTERNED, FLATTENED MODES - Field-flattening strands may be added to and arbitrarily positioned within a field-flattening shell to create a waveguide that supports a patterned, flattened mode. Patterning does not alter the effective index or flattened nature of the mode, but does alter the characteristics of other modes. Compared to a telecom fiber, a hexagonal pattern of strands allows for a three-fold increase in the flattened mode's area without reducing the separation between its effective index and that of its bend-coupled mode. Hexagonal strand and shell elements prove to be a reasonable approximation, and, thus, to be of practical benefit vis-à-vis fabrication, to those of circular cross section. Patterned flattened modes offer a new and valuable path to power scaling. | 08-08-2013 |
20130223803 | RESIN COMPOSITION FOR FORMATION OF OPTICAL WAVEGUIDE, RESIN FILM FOR FORMATION OF OPTICAL WAVEGUIDE WHICH COMPRISES THE RESIN COMPOSITION, AND OPTICAL WAVEGUIDE PRODUCED USING THE RESIN COMPOSITION OR THE RESIN FILM - The present invention relates to: a resin composition for forming an optical waveguide, containing (A) a polymer having a hydroxyl group and/or a carboxyl group, (B) a (meth)acrylate having a urethane bond, (C) a polyfunctional blocked isocyanate compound, and (D) a radical polymerization initiator; a resin film for forming an optical waveguide, containing the resin composition for forming an optical waveguide; and an optical waveguide containing a lower cladding layer, a core part and an upper cladding layer, at least one of which contains the resin composition for forming an optical waveguide or the resin film for forming an optical waveguide. The present invention provides a resin composition for forming an optical waveguide that can form a high precision thick film excellent in transparency, heat resistance and toughness and is useful for a resin film for forming an optical waveguide having high productivity; a resin film for an optical material containing the resin composition for forming an optical waveguide; and a resin composition for forming an optical waveguide, a resin film for forming an optical waveguide, and an optical waveguide excellent in transparency, heat resistance, environmental reliability and toughness, using the same. | 08-29-2013 |
20130230288 | OPTICAL FIBER - An optical fiber for use with a light source is illustrated. The optical fiber includes a main body with a cylindrical lateral surface and an end. The end includes an end surface substantially perpendicular to an axis of the main body and a convex connecting surface between the lateral surface and the end surface, thereby increasing incident angles of the light rays that refracted into the main body through the connecting surface. | 09-05-2013 |
20130236149 | OPTICAL WAVEGUIDE FORMING EPOXY RESIN COMPOSITION, CURABLE FILM FORMED FROM THE EPOXY RESIN COMPOSITION FOR FORMATION OF OPTICAL WAVEGUIDE, AND LIGHT TRANSMISSION FLEXIBLE PRINTED BOARD - An excellent optical waveguide forming epoxy resin composition is provided, comprising:
| 09-12-2013 |
20130243379 | MULTI-MODE OPTICAL FIBER - The present invention relates to a GI-type multi-mode optical fiber in which the outer diameter 2a of a core is 47.5 to 52.5 μm or 60 to 65 μm. In the multi-mode optical fiber, stress in the optical axis direction remaining in an outermost peripheral portion of the cladding is tensile stress of 0 to 25 MPa, the outermost peripheral portion of the cladding being defined as a region having a diameter of 1.8b or more when the diameter of the cladding is 2b. | 09-19-2013 |
20130243380 | OPTICAL FIBER, OPTICAL TRANSMISSION LINE, AND METHOD FOR MANUFACTURING OPTICAL FIBER - An optical fiber ( | 09-19-2013 |
20130251322 | METHOD OF MANUFACTURING GLASS PREFORM - A method of manufacturing a glass preform is provided. The method including, vaporizing an alkali metal compound or an alkali earth metal compound and being brought the alkali metal compound or the alkali earth metal compound into contact with a hydroxyl group on a surface of porous silica glass and dehydrating the porous silica glass, and sintering the dehydrated porous silica glass and forming a transparent glass body. | 09-26-2013 |
20130251323 | OPTICAL FIBER, OPTICAL TRANSMISSION SYSTEM, AND METHOD FOR MEASURING OPTICAL FIBER - An optical fiber includes a core portion and a cladding portion that is formed around an outer periphery of the core portion and has a refractive index lower than a maximum refractive index of the core portion. As characteristics at a wavelength of 1550 nm, an effective core area in a fundamental propagation mode is 120 μm | 09-26-2013 |
20130272668 | OPTICAL FIBER - An optical fiber of the invention satisfies Δ | 10-17-2013 |
20130279867 | OPTICAL FIBER - In order to decrease transmission loss caused by Rayleigh scattering in an optical fiber, without negatively affecting the curvature loss, provided is an optical fiber comprising a core at a center thereof, a low refractive index layer that is adjacent to the core and covers an outer circumference of the core, and a cladding that is adjacent to the low refractive index layer and covers an outer circumference of the low refractive index layer, wherein a refractive index of the core is higher than a refractive index of the cladding, a refractive index of the low refractive index layer is lower than the refractive index of the cladding, and the refractive index of the low refractive index layer decreases in a direction from an inner portion of the low refractive index layer to an outer portion of the low refractive index layer. | 10-24-2013 |
20130287351 | OPTICAL WAVEGUIDE FORMING EPOXY RESIN COMPOSITION, OPTICAL WAVEGUIDE FORMING CURABLE FILM, LIGHT TRANSMISSION FLEXIBLE PRINTED BOARD, AND PRODUCTION METHOD FOR THE FLEXIBLE PRINTED BOARD - An optical waveguide forming epoxy resin composition is free from a diluent component irrelevant to a curing reaction, and comprises:
| 10-31-2013 |
20130302000 | MULTI-MODE OPTICAL FIBER - The present invention relates to a GI-type multi-mode optical fiber in which the outer diameter of the core is 47.5 to 52.5 μm or 60 to 65 μm, or to a bend resistant multi-mode optical fiber provided with resistance against property fluctuation caused by the bending of the multi-mode optical fiber by providing a trench portion having a low refractive index at the outer periphery of the core. In the multi-mode optical fiber, both the maximum tensile stress and the maximum compressive stress in the optical axis direction remaining in the core are 50 MPa or less. | 11-14-2013 |
20130302001 | LOW-LOSS OPTICAL FIBER OVER WIDE WAVELENGTH RANGE AND METHOD OF MANUFACTURING THE SAME - A low-loss optical fiber over wide wavelength range includes a transmission loss of less than or equal to 40 dB/km in a whole wavelength range of 400-1400 nm, and being manufactured by drawing an optical fiber preform including a core composed of a silica glass having a hydroxyl-group concentration of less than or equal to 1 ppm and a cladding composed of a silica glass having a fluorine concentration of more than or equal to 3.2 wt %. | 11-14-2013 |
20140010506 | OPTICAL FUSE DEVICES, OPTICAL FIBER LINES, AND METHODS OF MANUFACTURING SAME - An optical fuse device adapted to be placed in between ends of lead-in fibers of an optical fiber line. The optical fuse device has a destructible region having a core, the destructible region including a light absorbing material adapted to heat and destroy the core upon application of a light intensity greater than a predetermined threshold. Optical fiber lines including the optical fuse device and methods of manufacturing the optical fuse device are provided. Numerous other aspects are provided. | 01-09-2014 |
20140050450 | OPTICAL FIBER PREFORM, METHOD OF MANUFACTURING OPTICAL FIBER PREFORM, AND METHOD OF MANUFACTURING OPTICAL FIBER - A porous layer is formed by depositing a silica glass particle around a core rod. The porous layer is dehydrated. The dehydrated porous layer is sintered under a decreased pressure until the dehydrated porous layer becomes a translucent glass layer containing a closed pore. The translucent glass layer is vitrified under an ambient atmosphere including an inert gas other than a helium gas. | 02-20-2014 |
20140056566 | Microlayer Coextrusion of Optical End Products - The disclosed embodiments generally relate to extruding multiple layers of micro- to nano-polymer layers in a tubular shape. In particular, the aspects of the disclosed embodiments are directed to a method for producing a Bragg reflector comprising co-extrusion of micro- to nano-polymer layers in a tubular shape. | 02-27-2014 |
20140064684 | OPTICAL FIBER - The present invention relates to an optical fiber having a structure to enable both prevention of resin coating combustion due to leaked light, and low-loss light transmission. The optical fiber comprises a core region, and a cladding region. The cladding region is constituted by an optical cladding which affects the transmission characteristics of light propagating in the core region, and a physical cladding which does not affect the transmission characteristics of light propagating in the core region. Particularly, a leakage reduction portion is provided in the physical cladding so as to surround an outer periphery of the core region through the optical cladding. The leakage reduction portion functions to suppress propagation of the leaked light propagating from the core region toward outside the cladding region. | 03-06-2014 |
20140064685 | OPTICAL FIBER AND OPTICAL COMMUNICATION SYSTEM INCLUDING THE SAME - An optical fiber according to an embodiment of the present invention is provided with a center core, a side core, and a cladding. The center core includes a ring part where a relative index difference varies discontinuously, in its peripheral region, and when a is a radius from a core center to an outside of the ring part and c is a radius to a position where the relative index difference is maximum in the side core, an index profile is realized in a shape where c/a is in the range of 2.25 to 2.50, so as to enable setting of a dispersion value, a cable cutoff wavelength, a bending loss in the diameter of 20 mm, and an effective area in desired ranges. | 03-06-2014 |
20140079362 | OPTICAL FIBER - An optical fiber | 03-20-2014 |
20140105553 | GRAPHENE PHOTONIC DEVICE - Provided is a graphene optical device. The optical device includes a lower clad, an optical waveguide extended on the lower clad in a first direction, a first dielectric layer disposed on the optical waveguide, and a graphene layer extended on the first dielectric layer in a second direction. | 04-17-2014 |
20140133816 | Holey Fiber - A holey fiber includes a core portion and a cladding portion in which holes located in the outer periphery of the core portion and arranged around the core portion in layers, and a low refractive index layer having an internal diameter that is equal to or larger than four times a mode field radius of light in the core portion and having a refractive index lower than the core portion are formed. | 05-15-2014 |
20140140672 | OPTICAL WAVEGUIDE FORMING RESIN COMPOSITION, OPTICAL WAVEGUIDE AND LIGHT TRANSMISSION FLEXIBLE PRINTED BOARD PRODUCED BY USING THE RESIN COMPOSITION, AND PRODUCTION METHOD FOR THE OPTICAL WAVEGUIDE - There are provided an optical waveguide forming resin composition, an optical waveguide and a light transmission flexible printed board both produced by using the composition, and a production method for the optical waveguide, wherein the resin composition is superior in coatability, capable of omitting a solvent drying step in coating film formation, and suitable as a material for forming an optical waveguide which allows only a low waveguide loss and which has a higher Tg and higher flexibility. An optical waveguide forming resin composition comprises the following components (A) through (D), wherein the optical waveguide forming resin composition is free from a solid resin component and the viscosity thereof under a 25° C. environment is within the range of 10 to 20 mPa·s:
| 05-22-2014 |
20140153888 | SUPERCONTINUUM PULSE SOURCE WITH ENHANCED SPECTRUM - A source of optical supercontinuum radiation comprises a microstructured optical fibre and a pump laser adapted to generate lasing radiation at a pump wavelength, the microstructured optical fibre comprising a core region and a cladding region which surrounds the core region; the core of the microstructured fibre comprising a first refractive index and the cladding region comprising an effective refractive index such that the Δ-value is greater than 0.03; the fibre comprising a zero dispersion wavelength within ±200 nm of said pump wavelength; wherein the fibre can support a plurality of modes at said pump wavelength; and wherein the pump laser is adapted to launch said lasing radiation at said pump wavelength into said core region of said microstructured optical fibre to excite the fundamental mode of the fibre. In one practice, the source of optical supercontinuum radiation does not include a pump laser arranged to pump said microstructured optical fibre at a wavelength different from said pump wavelength. | 06-05-2014 |
20140193127 | TRIPLE-SHEATHED MONOMODE OPTICAL FIBER - According to the invention, the intermediate sheath ( | 07-10-2014 |
20140205251 | COLOR CODED OPTICAL FIBERS - The specification describes an optical fiber color coding scheme that uses two colors, where each of the two colors constitutes one half of the surface of the optical fiber coating. If a longitudinal portion of the coating is considered a hollow cylinder, then each of the two colors is a hollow hemi-cylinder. To ensure that each of the two colors is always plainly visible to an installer, the two colors are formed with a twist. Using two colors for coding substantially increases the number of available unique color codes. Coloring the entire coating reduces the chances of error in identifying the optical fibers. | 07-24-2014 |
20140205252 | Non-Destructive Dissipation of Excess Optical Energy - Optical energy in excess of that which is properly coupled into the core of an optical fiber is non-destructively redirected and benignly dissipated so as to minimize damage in a fiber coupled system. | 07-24-2014 |
20140233900 | Microstructured Optical Fibre Having A Large Core And A Flattened Fundamental Mode, Production Method Thereof And Use Of Same In Laser Microfabrication - The fibre comprises a core ( | 08-21-2014 |
20140241682 | PHOTONIC DEVICE STRUCTURE AND METHOD OF MANUFACTURE - Disclosed method and apparatus embodiments provide a photonic device with optical isolation from a supporting substrate. A generally rectangular cavity in cross section is provided below an element of the photonic device and the element may be formed from a ledge of the supporting substrate which is over the cavity. | 08-28-2014 |
20140241683 | OPTICAL WAVEGUIDE ELEMENT AND METHOD OF PRODUCING THE SAME - An optical waveguide element includes a cladding portion made of a silica-based glass, and an optical waveguide positioned in the cladding portion and made of a silica-based glass in which a ZrO | 08-28-2014 |
20140270665 | LARGE CORE MULTIMODE OPTICAL FIBERS - The specification describes multimode optical fibers produced by improved methods that reduce the manufacturing cost. These methods may also be more efficient in terms of power loss. In one of the embodiments, the improved design has a large core of pure silica derived from a rod-in-tube method. In the embodiment, a down-doped cladding is produced by depositing fluorine-doped silica on the inside of a silica starting tube using isothermal radio frequency plasma deposition. The silica core is inserted and the starting tube collapsed. The silica starting tube is removed and optical fiber is drawn from the fluorine-doped glass coated silica rod. | 09-18-2014 |
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 |
20140270667 | Glass Buffers - The present disclosure is directed to optical fibers having glass buffers. As such, some embodiments comprise an optical fiber having a core, a cladding, and a glass buffer. For some embodiments, the glass buffer has an index of refraction that is greater than the index of refraction of the cladding. | 09-18-2014 |
20140270668 | REMOVING UNWANTED LIGHT FROM HIGH-POWER OPTICAL SYSTEMS - The present disclosure is directed to removing unabsorbed cladding light in high-power optical systems. Some embodiments comprise a glass block with a refractive index that is greater than a refractive index of a fiber cladding, and a metal housing that is located external to the glass block. The glass block and the metal housing, in combination, removes excess light. | 09-18-2014 |
20140270669 | OPTICAL FIBER SHEET - An optical fiber sheet | 09-18-2014 |
20140301706 | Low Brillouin Scattering Optical Fibers and Formation Methods Thereof - Disclosed is an optical fiber formed from a preform that includes a clad component and a core component. The core component includes one or more precursor core materials. The precursor core materials and the clad materials are selected such that that the photoelastic constants of at least one precursor core material and the clad material are of opposite sign resulting in a final glass optical fiber of tailored Brillouin performance. The clad material may include an oxide glass having a positive photoelastic constant and the core component may include a precursor core material that has a negative photoelastic constant. During formation, the precursor core material can melt and interact with clad material that precipitates into the core to form a glass of at least one tailored Brillouin property, such as very low Brillouin gain. | 10-09-2014 |
20140321823 | Multi-Mode Interference Device - A multi-mode interference (MMI) device includes a substrate layer, a core layer grown on the substrate layer for propagating an optical signal, and a cladding layer grown on the core layer for guiding the optical signal. The MMI device includes a patch with a non-uniform shape formed by an intersection of a plurality of curves forming a non-uniform refractive index distribution within the MMI device. The plurality of curves includes at least one curve with a non-null curvature. | 10-30-2014 |
20140369658 | MULTIMODE OPTICAL FIBER - The present invention relates to a multimode optical fiber having a structure for stably reducing eccentricity relative to an insert hole of a connector ferrule to be mounted at an end thereof, wherein a fiber outer diameter of the multimode optical fiber along its longitudinal direction varies periodically in a range of ±0.5 μm with respect to a target fiber outer diameter. | 12-18-2014 |
20140376867 | OPTICAL FIBER COATING FOR SHORT DATA NETWORK - A hybrid cladding for optical fibers used in short data networks. The hybrid cladding surrounds a glass waveguide fiber and is surrounded by a primary coating. The hybrid cladding has low adhesion to the primary coating. The low adhesion permits stripping of the primary coating from the hybrid cladding without damaging the hybrid cladding and without leaving residue of the primary coating on the surface of the hybrid cladding. The hybrid cladding may be formed by curing a composition that includes a monomer with a radiation-curable functional group, a slip component, and a photoinitiator. The radiation-curable functional group may be a (meth)acrylate group. The slip component may contain silicon or silicone and may further contain a radiation-curable functional group. Silicone di(meth)acrylate is an illustrative slip component. | 12-25-2014 |
20140376868 | HIGHLY TRANSMISSIVE GLASSES WITH HIGH SOLARISATION RESISTANCE, USE THEREOF AND METHOD FOR PRODUCTION THEREOF - Glasses are provided that are highly transparent and have very good resistance to solarisation. The resistance to solarisation is favoured to a special extent by the production method. The concentrations of reduced polyvalent ion species are reduced by targeted use of bubbling with an oxidising gas. Methods for producing glasses and to the uses thereof, particularly as core glasses in optical waveguides, are also provided. | 12-25-2014 |
20150016793 | Waveguide Structure - A waveguide structure includes a bottom dielectric layer, a core layer disposed over the bottom dielectric layer, an etch stop layer disposed over the core layer, and a cladding layer or a buffer layer disposed over the etch stop layer. The waveguide structure is configured to guide a light signal through different geography, such as straight, taper, turning, grating and tight coupling sections. | 01-15-2015 |
20150071595 | FIBER COATINGS WITH LOW YOUNG'S MODULUS AND HIGH TEAR STRENGTH - Fiber coatings with low Young's modulus and high tear strength are realized with coating compositions that include an oligomeric material formed from an isocyanate, a hydroxy acrylate compound and a polyol. The oligomeric material includes a polyether urethane acrylate and a di-adduct compound, where the di-adduct compound is present in an amount of at least 2.35 wt %. The reaction mixture used to form the oligomeric material may include a molar ratio of isocyanate:hydroxy acrylate:polyol of n:m:p, where n may be greater than 3.0, m may be between n−1 and 2n−4, and p may be 2. Young's modulus and tear strength of coatings made from the compositions increase with increasing n. Coatings formed from the present oligomers feature high tear strength for a given Young's modulus. | 03-12-2015 |
20150104138 | Method and Apparatus for Processing Optical Fiber Under Microgravity Conditions - An apparatus used for the fabrication of fiberoptic waveguides utilizing a novel melting and resolidifying apparatus and method while under microgravity conditions is disclosed. In one embodiment, the optical fiber core has a lower melting point than the cladding and the core is melted and resolidified under microgravity conditions. The molten lower melting point core is thus contained by the higher melting point cladding while under microgravity conditions. | 04-16-2015 |
20150125122 | GRAPHENE COATED FIBER OPTICS - A graphene coated optic fiber is disclosed that includes an optic fiber encapsulated within a graphene capsule. This graphene capsule may comprise a single layer of graphene or multiple layers of graphene. A graphene coated optic fiber is disclosed that includes a graphene end cap to protect and end portion of the optic fiber. | 05-07-2015 |
20150131955 | LIGHT DIFFUSING FIBER WITH LOW MELTING TEMPERATURE GLASS - A light-diffusing optical fiber that includes a core region in the fiber that comprises a core glass composition; and an inner cladding in the fiber that surrounds the core region and comprises a cladding glass composition that substantially differs from the core glass composition. The core glass composition comprises a doped, low-melting point silica glass having less than 90% by weight SiO | 05-14-2015 |
20150301278 | Preform for an Optical Waveguide and A Fiber with Non-Circular Core - Preform for an optical waveguide containing a core with a non-circular geometry and at least one cladding layer, in which the dopand concentration of the cladding layer is increased compared to the dopand concentration of a preform with circular core geometry and identical NA. A method for the production of a preform for an optical fiber is provided. An optical waveguide with a nominal dopand concentration of c(eff) x F≦c(nom) in at least one cladding layer is also provided. | 10-22-2015 |
20150329404 | METHOD OF PRODUCING GLASS PREFORM AND OPTICAL FIBER - A method of producing a glass preform including: forming a porous glass soot configured by an inner deposition soot deposited on a start material and an outer deposition soot deposited outside the inner deposition soot; and sintering, after the forming, the porous glass soot while doping with fluorine to form a glass body including an inner glass portion and an outer glass layer. An amount of the fluorine, with which the inner deposition soot is doped at the sintering, is equal to or more than 0 g/cm | 11-19-2015 |
20150329405 | OPTICAL FIBER MANUFACTURING METHOD AND OPTICAL FIBER - There is provided a method for producing a low-loss alkali metal-doped silica core optical fiber having excellent hydrogen resistance. The method for producing the optical fiber according to the present invention includes a drawing step of drawing an optical fiber preform in a drawing furnace to produce a silica glass-based optical fiber including a core region containing an alkali metal with an average concentration of 0.5 atomic ppm or more and a cladding region that surrounds the core region and a heating step of heating the optical fiber in a heating furnace through which the optical fiber drawn from the drawing furnace passes. | 11-19-2015 |
20150370008 | OPTICAL-FIBER PREFORM AND METHOD FOR MANUFACTURING OPTICAL-FIBER PREFORM - An optical fiber preform which can be drawn into a low attenuation optical fiber is provided with a core portion and a cladding portion surrounding the core portion. The core portion includes a first core portion and a second core portion surrounding the first core portion. The cladding portion includes a first cladding portion surrounding the second core portion and a second cladding portion surrounding the first cladding portion. The first core portion contains an alkali metal element, the concentration of oxygen molecules contained in glass is 30 mol ppb or more and 200 mol ppb or less in a part of or entire region having an alkali metal atom concentration of 100 atomic ppm or more, and the concentration of oxygen molecules contained in glass is 10 mol ppb or less in a region having an alkali metal atom concentration of 50 atomic ppm or less. | 12-24-2015 |
20160009588 | OPTICAL FIBER WITH REDUCING HYDROGEN SENSITIVITY | 01-14-2016 |
20160009589 | METHOD OF MAKING OPTICAL FIBERS IN A REDUCING ATMOSPHERE | 01-14-2016 |
20160147010 | OPTICAL FIBER - An optical fiber containing an alkali metal and capable of reducing Rayleigh scattering loss is provided. An optical fiber has a core and a cladding made of silica glass and enclosing the core. The cladding contains fluorine and has a refractive index lower than the refractive index of the core. The core contains first group dopants selected from the group of Na element, K element, or a compound thereof at an average concentration of 0.2 ppm or more and 10 ppm or less. The core also contains second group dopants for reducing the viscosity of silica glass and having a diffusion coefficient of 1×10 | 05-26-2016 |
20160161670 | OPTICAL FIBER FOR THE REDUCTION OF STIMULATED BRILLOUIN SCATTERING IN HIGH-POWER APPLICATIONS - The invention relates to an optical fiber comprising a core and a cladding, wherein the core is made of a glass composition having a near-zero electrostrictive coefficient M | 06-09-2016 |
20190146152 | Waveguide Array Module and Receiver Optical Sub-Assembly | 05-16-2019 |