| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 065391000 |
Plasma utilized
| 26 |
| 065413000 |
With step of vapor deposition
| 25 |
| 065435000 |
With fiber stretching, drawing, or pulling (e.g., from rod, etc.)
| 16 |
| 065406000 |
Joining or bonding optical fibers, waveguides, or preforms (e.g., coupling, etc.)
| 15 |
| 065402000 |
Producing bent, crimped, twisted, textured, or curled optical fibers or waveguides
| 10 |
| 065424000 |
Inert, nonoxidizing, or reducing environment
| 9 |
| 065392000 |
Laser utilized
| 7 |
| 065397000 |
Fluorine doping
| 6 |
| 065386000 |
Planar waveguides
| 6 |
| 065427000 |
Consolidating preform (e.g., sintering, etc.) | 5 |
| 20110100064 | METHOD AND APPARATUS FOR MANUFACTURING AN OPTICAL FIBER CORE ROD - A multi-functional method and apparatus are disclosed for producing a low hydroxyl ion-containing core rod from a tube suitable for the production of low-water optical fibers. The method and apparatus combine the use of process steps of (1) hermetically sealing a tubular quartz handle of a tubular porous core preform to a tube used to feed the porous preform into a sintering furnace, (2) dehydration and sintering, and (3) elongation of the sintered preform under vacuum, all without exposing the preform's central aperture surface to ambient atmosphere. | 05-05-2011 |
| 20120198892 | METHOD FOR PRODUCING OPTICAL FIBER PREFORM - A method for producing an optical fiber preform according to the present invention includes an etching step of heating a silica-based glass tube using a heat source continuously traversed in the longitudinal direction of the glass tube to etch the inner surface portion of the glass tube containing impurities while an etching gas is allowed to flow into the glass tube. The glass tube has a maximum alkali metal concentration of 500 to 20,000 atomic ppm, a maximum chlorine concentration of 0 to 1000 atomic ppm, and a maximum fluorine concentration of 0 to 10,000 atomic ppm. In the etching step, the maximum temperature of the outer surface of the glass tube is in the range of 1900° C. to 2250° C., and the heating time is set to a time equal to or less than a time (min) given by | 08-09-2012 |
| 20100071421 | Soot Radial Pressing For Optical Fiber Overcladding - A method and apparatus for making an optical fiber preform. The apparatus has an outer wall and an inner wall. The outer wall surrounds the inner wall and the inner wall surrounds an inner cavity of the apparatus. A consolidated glass rod is deposited in the inner cavity after which particulate glass material, such as glass soot, is deposited in the inner cavity around the glass rod. A radially inward pressure is applied against the particulate glass material to pressurize the particulate glass material against the glass rod. | 03-25-2010 |
| 20100122558 | Apparatus and Method of Sintering an Optical Fiber Preform - A method and apparatus for consolidating an optical fiber preform, wherein the optical fiber preform is located in a furnace comprising a muffle tube, said muffle tube comprising an inner section and an outer section surrounding the inner section. The inner and outer sections are comprised of different materials, and the preform is exposed to a pressure less than 0.8 atm while simultaneously exposing said preform to a temperature of at least 1000 C. | 05-20-2010 |
| 20120055199 | METHOD OF MANUFACTURING OPTICAL FIBER PREFORM - Provided is a method of manufacturing an optical fiber preform, comprising obtaining a base material ingot by sintering a porous glass base material at a high temperature to change the porous glass base material into glass while retaining an unsintered portion at one end thereof that is not completely changed to glass; and while relatively moving a heating means in a longitudinal direction of the base material ingot, applying a tensile force to a heated portion and beginning to extend the unsintered portion from one side to decrease a diameter of and extend the base material ingot. | 03-08-2012 |
| 065430000 |
With significant coating step | 5 |
| 20130118208 | METHOD AND APPARATUS FOR MANUFACTURING OPTICAL FIBER - This optical fiber manufacturing method includes: forming a bare optical fiber by drawing an optical fiber preform; forming an intermediate optical fiber by providing a coating layer, which is formed of resin, on the outer periphery of the bare optical fiber; performing primary curing of the coating layer which forms the intermediate optical fiber; pressing the outer periphery of the intermediate optical fiber; and performing secondary curing of the pressed coating layer of the intermediate optical fiber. | 05-16-2013 |
| 20100281922 | Methods for producing optical fibers - Methods for producing optical fibers along nonlinear paths include incorporating fluid bearings. An optical fiber is drawn from a preform along a first pathway, contacted with a region of fluid cushion of a fluid bearing, and redirected along a second pathway as the fiber is drawn across said region of fluid cushion. | 11-11-2010 |
| 20120192593 | METHOD FOR PRODUCING OPTICAL FIBER PREFORM - There is provided a method for producing an optical fiber preform used in producing an optical fiber having low attenuation. The production method includes (1) a rod formation step of forming a glass rod of a silica glass containing an alkali metal element, the average concentration of the alkali metal element being 5 at·ppm or more, (2) a heat treatment step of heat-treating the glass rod, (3) a core part formation step of forming an alkali metal element-free silica glass layer having a chlorine concentration of 6000 at·ppm or more around the perimeter of the glass rod heat-treated in the heat treatment step to form a core part including the glass rod and the silica glass layer, and (4) a cladding part formation step of forming a cladding part of a silica-based glass having a lower refractive index than the core part around the perimeter of the core part. | 08-02-2012 |
| 20100319406 | APPARATUS FOR AND METHOD OF PROCESSING GLASS OPTICAL FIBER, METHOD OF MANUFACTURING AND METHOD OF DRAWING OPTICAL FIBER - An apparatus includes: an introducer to introduce a glass optical fiber that has passed a pulling mechanism pulling, to draw the glass optical fiber, one end of an optical fiber preform that has been fused by heating; a shredder including a casing connected to the introducer and a shredding mechanism to shred the glass optical fiber introduced by the introducer in the casing into glass optical-fiber pieces; a pipe connected to the casing of the shredder and to carry the glass optical-fiber pieces; and a suction unit connected to the pipe and to suction the glass optical-fiber pieces via the pipe. | 12-23-2010 |
| 20100319405 | OPTICAL FIBER MANUFACTURING DEVICE AND OPTICAL FIBER MANUFACTURING METHOD - An optical fiber manufacturing device includes a bare optical fiber-forming unit that forms a bare optical fiber by pulling an optical fiber preform; a coating unit that forms an optical fiber by coating the bare optical fiber outputted from the bare optical fiber-forming unit with a coating layer; a first direction-converter, which is a solid body that comes into contact with the optical fiber outputted from the coating unit and thereby first changing its traveling direction; and a winder that winds the optical fiber obtained from the first direction-converter, in which: the first direction-converter is a rotating body having a circumferential face that contacts with the optical fiber and is formed around an axis of rotation thereof; and the contact angle, centered on the axis of rotation, between this rotating body and the optical fiber is in the range of 10° to 80°. | 12-23-2010 |
| 065425000 |
Electromagnetic, magnetic, wave, or particulate energy utilized | 5 |
| 20110277511 | MULTI-ELECTRODE SYSTEM WITH VIBRATING ELECTRODES - A multi-electrode system includes a fiber holder that holds at least one optical fiber, a plurality of electrodes arranged to generate a heated field to heat the at least one optical fiber, and a vibration mechanism that causes at least one of the electrodes from the plurality of electrodes to vibrate. The electrodes can be disposed in at least a partial vacuum. The system can be used for processing many types of fibers, such processing including, as examples, stripping, splicing, annealing, tapering, and so on. Corresponding fiber processing methods are also provided. | 11-17-2011 |
| 20090139269 | Fiber Cure with Extended Irradiators - A method for producing an optical fiber that includes a method for producing an optical fiber, said method comprising: (i) drawing a bare optical fiber from a preform along a first pathway at a rate of at least 10 m/sec; (ii) contacting said bare optical fiber with a region of fluid in a fluid bearing and redirecting said bare optical fiber along a second pathway as said bare optical fiber is drawn across said region of fluid cushion; (iii) coating the bare optical fiber; and (iv) irradiating said coated fiber in at least one irradiation zone to at least partially cure said coating, while subjecting the optical fiber to UV light. | 06-04-2009 |
| 20080264107 | Methods and Process of Tapering Waveguides and of Forming Optimized Waveguide Structures - In some embodiments of the present invention, an electrical field is applied across a waveguide substrate so as to induce ion exchange process that affects the cross section of the waveguide. Shaped electrical field may, according to the invention, may control the size and shape of the waveguide along it. | 10-30-2008 |
| 20090211303 | Accelerated aging of phosphorus-doped optical fibers - Adverse hydrogen aging limitations in multiply-doped optical fibers are overcome by passivating these optical fibers using a deuterium passivation process. This treatment essentially pre-reacts the glass with deuterium so that the most active glass sites are no longer available to react with hydrogen in service. Optical fibers of main interest are doped with mixtures of germanium and phosphorus. Optimum passivating process conditions are described. | 08-27-2009 |
| 20100132410 | SYSTEM AND METHOD FOR MANUFACTURING FIBRES - The present invention relates to a system for manufacturing fibres comprising a melting furnace, a crucible within said furnace comprising at least one orifice ( | 06-03-2010 |
| 065434000 |
With quench cooling (e.g., forced air or cryogenic immersion, etc.) | 4 |
| 20100107701 | OPTICAL FIBER MANUFACTURING METHOD AND OPTICAL FIBER MANUFACTURING APPARATUS - An optical fiber apparatus and manufacturing method thereof includes: forming a bare optical fiber by melting and deforming an optical fiber preform; cooling the bare optical fiber after the bare optical fiber forming step by passing it through a flow channel of a cooling unit through which cooling gas flows; and forming a protective coating layer by supplying a molten resin to a periphery of the bare optical fiber after the cooling step thereby forming an optical fiber. The cooling gas flowing toward a vertically lower end of the flow channel is blocked by the molten resin used to form the protective coating layer, and carbon dioxide gas is supplied toward the flow channel from a position which is vertically below the supply position of the cooling gas and vertically above the blocking position of the molten resin. | 05-06-2010 |
| 20090139270 | Fiber air turn for low attenuation fiber - A method for forming an optical fiber includes drawing the optical fiber from a glass supply and treating the fiber by maintaining the optical fiber in a treatment zone wherein the fiber is cooled at a specified cooling rate. The optical fiber treatment reduces the tendency of the optical fiber to increase in attenuation due to Rayleigh scattering, and/or over time following formation of the optical fiber due to heat aging. Methods for producing optical fibers along nonlinear paths incorporating fluid bearings are also provided thereby allowing for increased vertical space for the fiber treatment zone. | 06-04-2009 |
| 20100064731 | Thermally Stable IR-Transmitting Chalcogenide Glass - A thermally stable chalcogenide glass, a process for making the same, and an optical fiber drawn therefrom are provided. A chalcogenide glass having the composition Ge | 03-18-2010 |
| 20120260697 | SYSTEMS AND METHODS FOR COOLING OPTICAL FIBER - In one embodiment, an optical fiber cooling system includes a first cooling tube oriented substantially in parallel with and spaced apart from a second cooling tube such that an optical fiber pathway is positioned between the first cooling tube and the second cooling tube. The first cooling tube includes a plurality of cooling fluid outlets positioned along an axial length of the first cooling tube which are oriented to direct a flow of cooling fluid across the optical fiber pathway towards the second cooling tube. The second cooling tube includes a plurality of cooling fluid outlets positioned along an axial length of the second cooling tube which are oriented to direct a flow of cooling fluid across the optical fiber pathway towards the first cooling tube. | 10-18-2012 |
| 065393000 |
Hollow optical fibers or waveguides | 4 |
| 20090095023 | 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. | 04-16-2009 |
| 20090056383 | HOLEY OPTICAL FIBER WITH RANDOM PATTERN OF HOLES AND METHOD FOR MAKING SAME - A random array of holes is created in an optical fiber by gas generated during fiber drawing. The gas forms bubbles which are drawn into long, microscopic holes. The gas is created by a gas generating material such as silicon nitride. Silicon nitride oxidizes to produce nitrogen oxides when heated. The gas generating material can alternatively be silicon carbide or other nitrides or carbides. The random holes can provide cladding for optical confinement when located around a fiber core. The random holes can also be present in the fiber core. The fibers can be made of silica. The present random hole fibers are particularly useful as pressure sensors since they experience a large wavelength dependant increase in optical loss when pressure or force is applied. | 03-05-2009 |
| 20090133445 | Method for manufacturing glass body and method for manufacturing optical fiber - A method for manufacturing a glass body containing bismuth, which can be used for manufacturing an optical fiber having a low background-loss is provided. The method includes depositing a glass micro-particle layer on an inner wall of a glass pipe, consolidating the glass micro-particle layer to form a glass layer, reducing of a diameter of the glass pipe having the glass layer on the inner wall of the glass pipe, and collapsing the glass pipe having been reduced in diameter at the diameter-reducing step so as to form the glass body. At the depositing step, the glass micro-particle layer is formed while an organobismuth compound is being supplied into the glass pipe. At the consolidating step, the glass layer is consolidated while an organobismuth compound is being supplied into the glass pipe. The optical fiber is made by drawing the glass body. | 05-28-2009 |
| 20120118019 | METHOD OF PRODUCING OPTICAL FIBER - A method of producing an optical fiber that has a hole extending in a longitudinal direction includes preparing a glass preform that has a hole extending in a longitudinal direction, synthesizing a porous preform layer by depositing silica-based glass particles on an outer circumference of the glass preform, dehydrating the porous preform layer, sintering the dehydrated porous preform layer under a reduced pressure so that the porous preform layer becomes a translucent glass preform layer that contains closed pores, and drawing a translucent glass preform that includes the glass preform and the translucent glass preform layer so that the translucent glass preform layer becomes a transparent glass layer. | 05-17-2012 |
| 065404000 |
With step of casting or forming nonfiber workpiece (e.g., molding liquid preform, shaping molten glass against a forming surface, etc.) | 4 |
| 20090193851 | CORE SUCTION TECHNIQUE FOR THE FABRICATION OF OPTICAL FIBER PREFORMS - Optical fiber preforms which can be drawn into optical fibers of desired dimensions are fabricated by applying a vacuum to a cladding tube and drawing molten glass from a crucible into a bore of the cladding tube while a portion of the cladding tube is within a furnace preferably through a small hole in the top of the furnace. The method and apparatus are particularly applicable to highly non-linear fiber (HNLF) glasses and highly doped or rare earth glasses since materials therein are generally expensive and only a small quantity of molten glass is required but can be applied to virtually any optical fiber construction where the core glass has a lower melting or softening point than that of the cladding tube. Sources of contamination, breakage and other preform defects are substantially avoided and toxic substances, if present are readily confined. | 08-06-2009 |
| 20100107700 | Methods For Forming Cladding Portions Of Optical Fiber Preform Assemblies - A method of forming a cladding portion of an optical fiber preform assembly includes positioning a glass core cane in a mold cavity and loading the mold cavity with silica glass soot. The silica glass soot is compressed in an axial direction as the vibratory energy is applied to the mold body to form a soot compact around the glass core cane, wherein the soot compact is the cladding portion of an optical fiber preform assembly and the glass core cane is a core portion of the optical fiber preform assembly. | 05-06-2010 |
| 20090090136 | METHOD OF MAKING LOW-TEMPERATURE OPTICAL GLASS FIBERS FREE OF DEFECTS - A method of molding low-temperature glass into a preform for formation by drawing into glass fiber, especially for transmission of mid-IR, involves casting a cladding glass into a mold cavity in the shape of the desired preform to form a cladding layer, and forming a glass core within the cladding layer, wherein the molten cladding glass is drained from the bottom of the mold cavity, forming an annular coating of cladding glass as an annular layer, and the core glass is quickly added within the annular cladding layer to form the glass core with the cladding layer thereabout. | 04-09-2009 |
| 20090139268 | Optical glass, precision press-molding preform, optical element and processes for production of these - Provided are optical glasses having a phosphate-containing composition that can materialize highly useful optical properties including high-refractivity and high-dispersion properties; an optical glass comprising P | 06-04-2009 |
| 065426000 |
Drying, dehydration, OH removal or prevention | 4 |
| 20130098116 | MUFFLE TUBE INSPECTION METHOD AND MANUFACTURING METHOD OF SILICA GLASS-BASED OPTICAL FIBER PREFORM - A muffle tube inspection method inspects a muffle tube used for dehydrating and sintering a silica glass-based optical fiber preform, the muffle tube includes a sintering furnace provided with a furnace body covering a heater disposed around a periphery of the muffle tube. The method detects a crack generated at the muffle tube by measuring a pressure inside the furnace body while varying a pressure inside the muffle tube. | 04-25-2013 |
| 20100154480 | METHOD OF MANUFACTURING OPTICAL FIBER BASE MATERIAL - A method of manufacturing an optical fiber base material having very little impurity which deteriorates the transmission characteristic of an optical fiber is provided. The method of manufacturing an optical fiber base material including: producing a core member for the optical fiber base material by dehydrating and transparently vitrifying a base material formed by depositing glass particles; and drawing the core member and then adding a cladding thereto at a desired core to cladding ratio, wherein the dehydrating includes suspending the base material in a furnace tube having a heating region in a first atmosphere at a first temperature, the base material passing through the heating region as upwardly moving, and the transparently vitrifying includes situating the base material below once and then allowing the base material to pass through the heating region in a second atmosphere at a second temperature as upwardly moving again. | 06-24-2010 |
| 20100294002 | OPTICAL FIBER PREFORM MANUFACTURING METHOD - The present invention provides a method for manufacturing an optical fiber preform, which provides an optical fiber with stable transmission loss characteristics, and improves manufacturing efficiency. The method for manufacturing an optical fiber preform comprises dehydrating the optical fiber soot preform by lowering the optical fiber soot preform within the muffle tube and passing through a heating region, pulling up the dehydrated optical fiber soot preform to the predetermined position, and sintering the optical fiber soot preform by lowering the optical fiber soot preform again within the muffle tube and passing through the heating region where temperature of the heating region is higher than temperature of the heating region in dehydrating; wherein A≦B is satisfied where A is pull-up speed (mm/minute) of the optical fiber soot preform during the pulling up and B is gas flow rate (mm/minute) within the muffle tube at room temperature during the pulling up. Furthermore, 1.5×A≦B is satisfied. | 11-25-2010 |
| 20120318025 | DEVICE AND METHOD FOR MANUFACTURING AN OPTICAL PREFORM - A device for contracting a hollow substrate tube made of quartz glass into an optical perform including a heat source movable relative to the longitudinal direction of the substrate tube and an insert tube positioned in the interior of the substrate tube, at one end thereof, provided with a central opening through which a gas is passed and supplied to the interior of the substrate tube. | 12-20-2012 |
| 065388000 |
Nonoxygen halide glass (e.g., metal halide, etc.) | 3 |
| 20100107699 | Method and system for producing an infrared transmitting fiber - The invention relates to a method for producing an infrared transmitting fiber ( | 05-06-2010 |
| 20100095706 | Method for manufacturing optical fibers and optical fiber performs - A method of manufacturing an optical fiber preform, the method comprising: providing a substantially elongated core preform made out of a core fluorinated glass; providing a substantially elongated and substantially tubular cladding preform made out of a cladding fluorinated glass, the cladding preform defining a bore extending substantially longitudinally therethrough; inserting the core preform into the bore of the cladding preform; fusing the core preform and the cladding preform to each other to produce an intermediate preform; heating the intermediate preform up to a stretching temperature, the stretching temperature being such that the core and cladding fluorinated glasses both have a viscosity of between 10 | 04-22-2010 |
| 20100077800 | METHOD FOR FABRICATING POROUS SILICAPREFORM AND POROUS SILICA PREFORM - A method for fabricating a porous silica preform includes the steps of supplying fuel gas for generating an oxyhydrogen flame to a glass synthesizing burner; supplying Gas A containing silicon and Gas B containing fluorine to the burner; synthesizing glass particles; and depositing the glass particles around a starting rod, in which when glass particles are deposited directly on the starting rod, a supply of Gas A and a supply of Gas B supplied to the burner are adjusted so that a ratio of the number of fluorine atoms to the number of silicon atoms in the gas supplied to the burner satisfies the following Formula (1): | 04-01-2010 |
| 065399000 |
Incorporating dopant into porous body | 2 |
| 20100000260 | METHOD FOR FABRICATING A PREFORM, A PREFORM, AN OPTICAL FIBER AND AN AMPLIFIER - The present invention relates to a method and an apparatus for fabricating a preform ( | 01-07-2010 |
| 20120060561 | GLASS PREFORM MANUFACTURING METHOD - A glass preform manufacturing method, includes: preparing a glass element having a rough surface; turning a raw material of an alkali metal compound or a raw material of an alkaline earth metal compound into particles; depositing particles of the alkali metal compound or the alkaline earth metal compound on the rough surface of the glass element; oxidizing the particles of the alkali metal compound or the alkaline earth metal compound while diffusing alkali metal oxide or alkaline earth metal oxide in the glass element; and manufacturing a glass preform into which the alkali metal oxide or the alkaline earth metal oxide is doped. | 03-15-2012 |
| 065387000 |
Forming lens integral with optical fiber | 2 |
| 20090277228 | THREE-DIMENSIONAL OPTICAL WAVEGUIDE, METHOD OF MANUFACTURING SAME, OPTICAL MODULE, AND OPTICAL TRANSMISSION SYSTEM - A three-dimensional optical waveguide is formed by laminating planar substrates such as a plurality of lens substrates and, an isolator substrate and a wavelength division multiplexing filter, the optical substrates at least include a waveguide substrate having a waveguide and a reflecting surface. In the three-dimensional optical waveguide, the planar substrates are positioned by markers integrally formed on at least two of the planar substrates. Light directed into the waveguide is reflected by a reflecting surface and passes through the lens substrates and the isolator substrate. | 11-12-2009 |
| 20080245109 | METHODS TO FABRICATE A PHOTOACTIVE SUBSTRATE SUITABLE FOR SHAPED GLASS STRUCTURES - This invention provides an inexpensive and rapid method for fabricating a high-anisotropic-etch ratio, shaped glass structures using a novel photosensitive glass composition. Structures of the photosensitive glass may include micro-channels, micro-optics, microposts, or arrays of hollow micro-needles. Furthermore, such shaped glass structures can be used to form a negative mold for casting the shape in other materials. | 10-09-2008 |
| 065390000 |
Scandium (Sc), yttrium (Y), or rare earth doped core or preform (i.e., atomic numbers 21, 39, 57-72) | 2 |
| 20110067451 | Method of Fabricating Optical Fiber Using An Isothermal, Low Pressure Plasma Deposition Technique - An isothermal, low pressure-based process of depositing material within a substrate has been developed and results in creating an extremely narrow reaction zone within which a more uniform and efficient deposition will occur. Sets of isothermal plasma operating conditions have been found that create a narrow deposition zone, assuring that the deposited material is clear glass rather than soot particles. The chemical delivery system, in one arrangement, utilizes rods of solid phase source material (which may otherwise be difficult to obtain in gaseous form). The operating conditions are selected such that the hot plasma does not transfer a substantial amount of heat to the substrate tube, where the presence of such heat has been found to result in vaporizing the reactant material (creating soot) and developing hot spots. | 03-24-2011 |
| 20120151968 | METHOD OF MANUFACTURING PHOTONIC BAND GAP FIBER BASE MATERIAL AND METHOD OF MANUFACTURING PHOTONIC BAND GAP FIBER - A method of manufacturing a photonic band gap fiber base material includes: a forming step of continuously forming a columnar core glass body | 06-21-2012 |
| 065395000 |
Sol-gel or liquid phase route utilized | 2 |
| 20090235696 | Method for Manufacturing Grin Lens - A method of manufacturing a GRIN lens includes a forming a wet gel from an alcohol solution containing a silicon alkoxide, a dopant alkoxide, and an aluminum alkoxide; dissolving by leaching the dopant and aluminum away from an outer peripheral surface of the wet gel to provide a refractive index distribution; forming a dry gel by drying the wet gel; forming a glass preform by firing the dry gel; and wire-drawing the perform. In the step of leaching, most aluminum dissolves from the wet gel, thereby increasing the porosity of the dry gel and preventing cracking during sintering and foaming during wire-drawing. | 09-24-2009 |
| 20080264106 | Process for the Production of Glass-Monoliths by Means of the Sol-Gel Process - Method for fabricating a glass-monolith by the sol-gel process, in which a pyrogenically produced silica (fumed silica) is used in the form of a powder and/or a dispersion, characterized in that as pyrogenically produced silica (fumed silica) a silica (fumed silica) deriving from the group highly pure, pyrogenically produced silica (fumed silica) with a metal content of lower than 9 ppm and/or a pyrogenically prepared silicon dioxide powder having—a BET surface area of 30 to 90 m2/g, —a DBP number of 80 or less, an average aggregate area of less than 25,000 nm2, an average aggregate circumference of less than 1,000 nm, at least 70% of the aggregates having a circumference of less than 1,300 nm is used. | 10-30-2008 |
| 065400000 |
Ion exchange utilized | 1 |
| 20100251775 | DEUTERIUM TREATMENT METHOD FOR OPTICAL FIBRES - A treatment method for an optical fibre including the steps of exposing the fibre to an atmosphere containing deuterium at a given temperature, concentration and pressure, measuring the attenuation in the fibre as a function of time at least one wavelength, during the exposure of the fibre to an atmosphere containing deuterium, identifying an attenuation maximum after an exposure duration, and stopping the exposure of the fibre to the atmosphere containing deuterium when said duration has elapsed. | 10-07-2010 |
| 065429000 |
With etching or leaching | 1 |
| 20100236293 | APPARATUS AND METHOD FOR MANUFACTURING TAPERED FIBER OPTIC COMPONENTS - A system for producing a tapered fiber optic component, the system including a support platform, coupled with a first end of an optical fiber, a weight suspended from a second end of the optical fiber, such that the weight applies longitudinal pulling pressure on the optical fiber, and a moveable heater, positioned adjacent to a predetermined area of the optical fiber, the predetermined area is positioned between the first end and the second end of the optical fiber, the moveable heater applying thermal energy to the predetermined area of the optical fiber, when the optical fiber is lengthened by the pulling pressure, the movable heater follows the predetermined area, such that the movable heater remains adjacent to the predetermined area of the optical fiber. | 09-23-2010 |
| 065394000 |
Ion implantation | 1 |
| 20100071420 | Optical Fiber Preform Fabricating Method, Optical Fiber Fabricating Method and Optical Fiber - The present invention relates to an optical fiber preform fabricating method that makes it possible to implement a reduction in iron impurities at a low cost. The optical fiber preform fabricating method comprises a glass synthesis step for forming a glass region constituting at least a part of the core area of the optical fiber. The glass synthesis step includes a deposition step of depositing glass particles containing the Al-element inside the glass pipe by means of chemical vapor deposition, and a consolidation step of obtaining a transparent glass body from the glass soot body thus obtained. In other words, the deposition step synthesizes glass particles on the inside wall of a glass pipe by feeding raw material gas, in which the content ratio (O/Al) of the O-element and Al-element is 20 or less, into the glass pipe. Furthermore, the consolidation step obtains a transparent glass body from the glass soot body by heating the glass soot body. The transparent glass body that is formed in the consolidation step constitutes part of the core region. | 03-25-2010 |
| 065401000 |
Extruding | 1 |
| 20100162770 | Armored Fiber Optic Assemblies and Methods of Making the Same - Armored fiber optic assemblies are disclosed that include a dielectric armor along with methods for manufacturing the same. The dielectric armor has an armor profile, thereby resembling conventional metal armored cable to the craft. The dielectric armor provides additional crush and impact resistance and the like for the optical fibers and/or fiber optic assembly therein. The dielectric armor is advantageous to the craft since it provides the desired mechanical performance without requiring the time and expense of grounding like conventional metal armored cables. Additionally, the armored fiber optic assemblies can have any suitable flame and/or smoke rating for meeting the requirements of the intended space. | 07-01-2010 |
