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| Number | Title | Issue Date |
| 7647792 | Method for fabricating 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... | 01/19/2010 |
| 7299659 | Method for manufacturing optical fiber preforms Method and burner for increasing the deposition rate of porous glass deposit in the manufacture of optical preforms, by modifying the cross-sectional shape of the flow of glass particles impacting onto a target preform. In particular, the cross-section of the flow o... | 11/27/2007 |
| 7270550 | Board to board connector A board to board connector includes a dielectric housing and a plurality of terminals. The dielectric housing has an upper surface, a bottom surface and a plurality of terminal passages which pass through the upper surface and the bottom surface. Each terminal is re... | 09/18/2007 |
| 7159418 | Method of producing synthetic quartz glass Fluorine-containing synthetic quartz glass is produced by feeding silica-forming material, hydrogen, and oxygen gases from a burner to a reaction zone, flame hydrolyzing the silica-forming material in the reaction zone to form particles of silica, depositing the sil... | 01/09/2007 |
| 7116877 | Method of manufacturing an optical fibre suitable for high transmission rates The present invention relates to a method of manufacturing an optical fibre suitable for high transmission rates, which method comprises: i) supplying one or more glass forming precursors, and possibly a dopant, to a quartz substrate tube, ii) forming a plasma in th... | 10/03/2006 |
| 7082791 | Apparatus for fabricating soot preform for optical fiber An apparatus for fabricating a soot preform for an optical fiber. The soot preform is fabricated by depositing glass particles on a starting rod capable of being rotated and pulled up. The apparatus comprises elements as follows. A reaction chamber is used for depos... | 08/01/2006 |
| 7073354 | Method for manufacturing optical fiber preform and burner apparatus for this method for manufacturing optical fiber preform The present invention provides an optical fiber preform manufacturing method and a burner apparatus employed for this method. In this manufacturing method, when glass particles are synthesized in an oxy-hydrogen flame emitted from a burner to form a porous optical f... | 07/11/2006 |
| 7069748 | Optical fiber, optical fiber preform, and manufacturing method therefor An optical fiber and an optical fiber preform having optical characteristics, such as the wavelength dispersion, close to design values by controlling the amount of change in the refractive index in the core, thereby realizing high-quality and high-speed transmissio... | 07/04/2006 |
| 7058269 | Reconstructed glass for fiber optic applications The present invention concerns a preform for an optical fiber, an optical fiber so obtained and methods for making the same. The fiber is characterized in that porous glass doped with at least one dopant is used. Resulting fibers can be used to make high attenuation... | 06/06/2006 |
| 7013678 | Method of fabricating graded-index optical fiber lenses A GRIN fiber lens is fabricated by the steps of providing a graded index glass preform, thinning the graded index preform to remove a sufficient thickness of the graded glass to establish a desired Δn, and drawing a graded index optical fiber from the thinned grade... | 03/21/2006 |
| 6988378 | Light weight porous structure These glass bodies are light weight porous structures such as a boules of high purity fused silica (HPFS). More specifically, the porous structures are supports for HPFS mirror blanks. Porous glass is made utilizing flame deposition of pure silica or doped silica in... | 01/24/2006 |
| 6965469 | Fiber amplifier having a non-doped inner core and at least one doped gain region A fiber amplifier includes at least one longitudinally extending non-doped inner core capable of transmitting signals. At least partially surrounding the inner core and extending at least partially therealong, the fiber amplifier also includes at least one gain regi... | 11/15/2005 |
| 6938443 | Method for the manufacture of a quartz glass preform for an optical fiber The invention relates to a method for manufacture of a quartz glass preform for an optical fibre consisting of the following steps: preparation of a hollow cylinder made of porous quartz glass which exhibits an inner layer with a doping substance which increases the... | 09/06/2005 |
| 6928841 | Optical fiber preform manufacture using improved VAD The specification describes a VAD method for producing optical fiber preforms by depositing soot onto a solid core rod. The solid core rod preferably has a uniform composition, doped or undoped, suitable for the center core region of the preform. The primary claddin... | 08/16/2005 |
| 6910352 | Deposition of high fluorine content silica soot The invention includes methods of making a fluorine doped soot particle. One method of the invention includes the steps of (1) delivering a silicon containing precursor to a first opening in a burner face; (2) delivering a source of oxygen to a second opening, where... | 06/28/2005 |
| 6862900 | Method and apparatus for reducing stress between depositions within a substrate tube A method and apparatus for forming a glass article such as an optical fiber having a substantially matching viscosity across an interface associated with a first section and a second section of the optical fiber is disclosed herein. The first section has a first hal... | 03/08/2005 |
| 6843076 | Single step laydown method of making dry fiber with complex fluorine doped profile A method of making an optical waveguide preform includes forming a preform including a first portion and a second radial portion, wherein the second portion includes a dopant, and wherein the first portion exhibits a density greater than the second portion. The meth... | 01/18/2005 |
| 6817213 | Method of fabricating optical fiber preform and method of fabricating optical fiber Methods of fabricating an optical fiber preform and a method of fabricating an optical fiber of the invention realize the fabrication of an optical fiber having desirable transmission characteristics in the entire wavelength rage of about 1.3 to 1.6 μm. The fabrica... | 11/16/2004 |
| 6802191 | Controlled collapse of depressed index optical fiber preforms The doped silica core region of a core rod for an optical fiber preform is protected against unwanted fluorine doping during fluorine doping of the outer silica layer by selectively consolidating the core region prior to fluorine doping. Due to dopants in the core r... | 10/12/2004 |
| 6790529 | Multimode fiber having a refractive index profile The present invention relates to a multimode fiber having a refractive index profile, wherein the area surrounding the center of the fiber has a refractive index profile such that the responses of a DMD (Differential Mode Delay) measurement carried out on a fiber ha... | 09/14/2004 |
| 6751987 | Burners for producing boules of fused silica glass Burners (14) are used to make glass bodies (19) from OMCTS. The burners have six concentric regions. Putting certain gases through the regions results in thicker bodies than can be achieved with existing techniques and with improved efficiency. ... | 06/22/2004 |
| 6748768 | Apparatus and method of doping silica with fluorine during laydown A method for doping silica soot with fluorine during laydown, including providing a bait rod, and providing a burner, wherein the burner emits a reactant flame. The method also including providing at least one first gas-feed separate from the burner, wherein the gas... | 06/15/2004 |
| 6739156 | Maintaining a plug-free system during a silica soot creation process The present invention is directed to a system and method for delivering liquid reactants through a burner assembly to form soot used in the manufacture of glass, and in particular, optical waveguides. Due to the tendency of liquid reactants to react to form solids w... | 05/25/2004 |
| 6735981 | High heat capacity burners for producing fused silica boules Burners and methods for producing fused silica members. The burner includes seven gas-emitting regions, including four regions for emitting a mixture of oxygen and combustible gas. ... | 05/18/2004 |
| 6574994 | Method of manufacturing multi-segmented optical fiber and preform A method for manufacturing optical fiber preform and fiber. According to the method, a core cane segment is formed with a refractive index delta preferably between 0.2% and 3% that is most preferably formed by an OVD method. A sleeve is formed including a... | 06/10/2003 |
| 6535679 | Optical fiber and method of manufacturing the same In an optical fiber of this invention, the MFD is increased to effectively suppress the influence of nonlinear optical effects. A method of manufacturing the optical fiber effectively prevents bubble occurrence in a transparent preform, deformation of the... | 03/18/2003 |
| 6523369 | Method of forming an optical fiber A method and apparatus are disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low n... | 02/25/2003 |
| 6467313 | Method for controlling dopant profiles The present invention discloses novel methods for fabricating glass articles, particularly optical fiber glass preforms, which may contain alumina, yttrium, lanthanum, erbium, or other rare earth metals as dopants. The glass articles made in accordance wi... | 10/22/2002 |
| 6405567 | Reduced dispersion optical waveguide and methods for fabricating the same A reduced dispersion optical waveguide and methods of fabricating the same are implemented. The optical waveguide may be fabricated in commercially practicable units without having to predetermine its length in a particular application. The reduced disper... | 06/18/2002 |
| 6379873 | Method and apparatus for the construction of photosensitive waveguides There is disclosed a method of constructing photosensitive waveguides on silicon wafers through the utilization of a Plasma Enhanced Vapor Deposition (PECVD) system. The deposition is utilized to vary the refractive index of resulting structures when they... | 04/30/2002 |
| 6318128 | Method of making an article having a gradient composition According to the invention, a) at least the first and second compositions of this material in the fluid phase are prepared, b) a sheet (61) of the first composition is poured continuously onto a flat support (4), c) a sheet (62) of t... | 11/20/2001 |
| 6145344 | Method for the preparation of a porous silica glass preform for optical fibers Proposed is an improvement in the VAD process for the preparation of a porous silica glass preform for double-core optical fibers by using three oxyhydrogen flame burners installed one above the other in a flame hydrolysis chamber in which a porous silica... | 11/14/2000 |
| 6138479 | Method for making an article having a gradient of composition The present invention relates to a method of making a rectangular bar have a gradient composition. In optical or ophthalmic applications, the gradient of composition ensures formation of a corresponding gradient of optical property, such as refractive ind... | 10/31/2000 |
| 6062046 | Method of making a single-mode optical fiber with multiple concentric core portions including the RIT process The present invention relates to a single-mode optical fiber having a configuration which enables lowering of dispersion slope while securing a sufficient MFD. This single-mode optical fiber has a refractive index profile in which an indent with a suffici... | 05/16/2000 |
| 5933743 | Method of improving alignment signal strength by reducing refraction index at interface of materials in semiconductors A method and resulting structure for reducing refraction and reflection occurring at the interface between adjacent layers of different materials in a semiconductor device, assembly or laminate during an alignment step in a semiconductor device fabricatio... | 08/03/1999 |
| 5761366 | Optical fiber with smooth core refractive index profile and method of fabrication A method of fabricating a dispersion shifted optical fiber with a smooth annular ring refractive index profile has the steps of heating a quartz tube with an external oxygen or hydrogen burner and supplying the quartz tube with raw materials including SiC... | 06/02/1998 |
| 5746797 | Process for producing a gradient index optical element A gradient index optical element is disclosed which comprises a surface perpendicular to an optical axis, this surface having points of equal refractive index whose connection provides substantially elliptic lines. This gradient index optical element can ... | 05/05/1998 |
| 5696038 | Boule oscillation patterns in methods of producing fused silica glass Oscillation/rotation patterns for improving the off-axis homogeneity of fused silica boules are provided. The patterns reduce the optical effects of periodic off-axis striae by decreasing the ratio of Ɗnstriae to Ɗzstriae, where Ɗ... | 12/09/1997 |
| 5683486 | Method of forming a fiber preform to minimize shifts of the zero-dispersion wavelength An improvement is proposed, in a method for the preparation of a step-index silica glass preform as a precursor of optical fibers by completing the cladding layer of the secondary preform by the outer deposition on and around a primary preform consisting ... | 11/04/1997 |
| 5676725 | Method of manufacturing single-mode optical fiber A method of manufacturing an optical fiber in which the deviation of a cutoff wavelength from a design value can be minimized. It is found that, upon diameter reduction of a porous core glass body by heat treatment, when the diameter reduction ratio is se... | 10/14/1997 |
