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| Number | Title | Issue Date |
| 7290408 | Apparatus for supporting a preform having a supporting core The invention relates to apparatus for supporting a preform manufactured in an installation for manufacturing or building up preforms having supporting cores, said installation including at least rotation means having a horizontal axis of rotation and two mounting p... | 11/06/2007 |
| 7233469 | Components having actively controlled circuit elements Protection and filtering functions are provided for external circuits by internal circuits that use controlled elements. ... | 06/19/2007 |
| 7185517 | Double crucible for a glass drawing method and method of making glass fiber or a preform with the double crucible The double crucible for a glass drawing method has a heatable outer crucible (1) and an inner crucible (2) surrounded by the outer crucible (1), which is heatable separately from the outer crucible (1). Both crucibles (1,2) have an... | 03/06/2007 |
| 7171086 | Process for manufacture of an optical transmission element with several dry and compressible filling elements as well as optical transmission element In a process for the manufacture of an optical transmission element with several optical waveguides and with a slot element each surrounding the optical waveguides, a filling compound is applied intermittently to the optical waveguides in a liquid state. The optical... | 01/30/2007 |
| 7028508 | Method for producing an optical fiber and optical fiber In the known method for producing an optical fiber, a coaxial arrangement comprising a core rod and an outer jacket tube is elongated, the coaxial arrangement being supplied in a vertical orientation to a heating zone and being softened therein zonewise, starting wi... | 04/18/2006 |
| 7018504 | Loadlock with integrated pre-clean chamber A wafer carrier adapted to hold a plurality of wafers and is positioned on an elevator plate in a load lock. The elevator plate is adapted to move between a first position with the carrier in a first chamber of the load lock and a second position with the carrier in... | 03/28/2006 |
| 6996324 | Optical waveguide and method for fabricating the same An optical waveguide comprising cladding 1 and core segment 20 buried in cladding 1 and serving as a waveguide, wherein a combination of glass material constituting the core segment 20 and another glass material constituting the cladding ... | 02/07/2006 |
| 6968705 | Method and plant for cooling fluids by direct contact with liquefied gases A method and apparatus for cooling a fluid in the liquid state, possibly also containing solid elements, comprising feeding said fluid into a containing member for said fluid and also feeding into said member a cooling fluid in the liquid state, such as a liquefied ... | 11/29/2005 |
| 6902759 | Technique for coating or marking glass strands A method for providing a metallic coating on glass strands or organically precoated glass strands comprising the steps of coating the glass strand (or organically precoated glass strand) with a metallorganic material, heating the metallorganically coated glass stran... | 06/07/2005 |
| 6626011 | Method of manufacturing a monomode fluoride optical fiber, and an optical amplifier using such a fiber The invention provides a monomode optical fiber and a monomode preform (2) having a mother preform (22) housed in an outer sleeve tube (20). It is characterized in that it also includes an intermediate tube (21) between the mother preform (22) and the out... | 09/30/2003 |
| 6604388 | Solid state glass constituent delivery system 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... | 08/12/2003 |
| 6564587 | Method of producing an optical fiber by gathering material from a molten bath A starting material for producing optical fibers contains metal halides. The refractive index of the optical fiber formed from the starting marterial is predeterminable by adjusting a composite of the molten bath. The starting material is produced by mixi... | 05/20/2003 |
| 6510710 | Multi-tube delivery system 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... | 01/28/2003 |
| 6490889 | Method of forming a glass preform 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... | 12/10/2002 |
| 6223562 | Etching a halide glass tube, removing the etchant, and forming an optical fiber The surface quality of halide, preferably fluoride, articles, e.g., articles used in the preparation of halide fibers is improved by cleaning the surface with an aqueous etchant and thereafter removing the etchant by washing the surface with methanol. The... | 05/01/2001 |
| 6192713 | Apparatus for the manufacture of glass preforms A method and apparatus is 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 nu... | 02/27/2001 |
| 6178281 | Method for the manufacture of optical components, and optical component A method for the manufacture of optical components, at least one three-dimensional optical waveguide structure being produced in a light-sensitive substrate by locally subjecting the substrate to an exposure so that a difference in refractive index betwee... | 01/23/2001 |
| 6154593 | Optical device and formation of optical waveguide using light-induced effect on refractive index A glass 1 is irradiated with a focused pulsed laser beam 2 having a peak power density of 105 W/cm2 or more and a repetition rate of 10 KHz or more. The glass 1 irradiated with the laser beam 2 changes its refractive index at the foc... | 11/28/2000 |
| 6014403 | Induction furnaces for the synthesis of glasses In an induction furnace for the synthesis of glasses, in particular fluorozirconate glasses for optical fibres for telecommunications, the support device (6') for the crucible (3) is associated with a pair of sleeves (7, 9) between which an annular elemen... | 01/11/2000 |
| 5978538 | Optical device and formation of optical waveguide using light-induced effect on refractive index A glass is irradiated with a focused pulsed laser beam having a peak power density of 105 W/cm2 or more and a repetition rate of 10 KHz or more. The glass irradiated with the laser beam changes its refractive index at the focal point... | 11/02/1999 |
| 5942019 | Elongating apparatus and method for glass preform and furnace body for elongating apparatus A furnace body for a glass preform elongating apparatus which makes an elongated body by passing the glass preform through the furnace body and elongating the glass preform while heating the glass preform, the furnace body comprising a furnace core tube s... | 08/24/1999 |
| 5891531 | Process for producing a thin film of a flouride A process for producing a thin film of a fluoride comprising reacting a gaseous fluorinating agent and gas of a volatile organometallic compound in a gas phase in a reactor, wherein a plasma of the gaseous fluorinating agent obtained by activating the gas... | 04/06/1999 |
| 5858052 | Manufacture of fluoride glass fibers with phosphate coatings The specification describes a method for the manufacture of fluoride glass optical fibers which are covered with a protective coating of phosphate glass. The coating is produced by dipping the fluoride glass preform in a phosphate glass melt prior to draw... | 01/12/1999 |
| 5827346 | Method of making core holes in cast optical fiber preforms by drawing a wire therethrough during solidification A method of making core holes in cast cladding glass for fabricating optical fiber preforms to make single and multimode optical fibers. Liquid cladding glass is pored into a casting mold having a metallic wire that is translated through the liquid glass ... | 10/27/1998 |
| 5779756 | Method of centrifuging a halide glass and forming an optical fiber preform A method of fabricating a fluoride glass optical fiber preform which has a fluoride glass core surrounded by a fluoride glass optical cladding includes the following steps: introducing the cladding glass in the molten state into a bottom part of a mold ha... | 07/14/1998 |
| 5776222 | Method of eliminating light scattering bubbles in optical fiber preforms A method of fabricating optical preforms that yield optical fibers having minimal scattering centers by substantially eliminating bubbles and crystallites that form during preform fabrication. The method utilizes glasses having low viscosity in their liqu... | 07/07/1998 |
| 5746801 | Process of producing fluoride glass A process for producing fluoride glass, including the steps of: introducing a raw material for fluoride glass into a heating vessel; and heating the raw material in the heating vessel, while causing the heating vessel to have a negative internal pressure ... | 05/05/1998 |
| 5688553 | Polyimide coated heavy metal fluoride glass fiber and method of manufacture A method of making a polyimide coated heavy metal fluorinated fiber includes the steps of drawing an optical fiber through a low-temperature curing polyimide solution to form a polyimide coating which cures in a range of about 200° and 390° C. A low cur... | 11/18/1997 |
| 5656056 | Method for the fabrication of fluoride glass single mode optical fibers with flowing of an etchant through the fiber preform Fluoride glass optical fibers are fabricated by minimizing the number of high-temperature operations. A tube comprising an external layer of a first fluoride glass of composition suitable to form the cladding of the fiber and an internal layer of a second... | 08/12/1997 |
| 5651083 | Core insertion method and apparatus for making optical fiber preforms and optical fibers fabricated therefrom A method and apparatus are provided for forming a glass preform which can be directly drawn into a single or multi-mode optical fiber. Single or multi-mode fibers drawn from the preforms described herein have high quality core-clad interfaces since the co... | 07/22/1997 |
| 5642454 | Method and apparatus for making optical fiber preforms and optical fibers fabricated therefrom A method and apparatus are provided for drawing a self-aligned core fiber free of surface contamination and inserting the core fiber into a cladding material to make an optical fiber preform. Single or multi-mode optical fibers having high quality core-cl... | 06/24/1997 |
| 5618326 | Surface treatment of halide glass articles The surface quality of halide, preferably fluoride, articles, e.g. articles used in the preparation of halide fibres is improved by cleaning the surface with an aqueous etchant and thereafter removing the etchant by washing the surface with methanol. The ... | 04/08/1997 |
| 5618325 | Method of manufacturing a multi-component glass cylindrical part in the form of a tube and/or rod Method of manufacturing a multi-component glass cylindrical part comprising the operations of providing a vertical cylindrical cavity lined with porous membranes whose inside dimensions are very slightly larger than those of the glass cylindrical part and... | 04/08/1997 |
| 5573571 | Method for making optical fiber preforms and optical fibers fabricated therefrom A method and apparatus are provided for drawing a self-aligned core fiber free of surface contamination and inserting the core fiber into a cladding material to make an optical fiber preform. Single or multi-mode optical fibers having high quality core-cl... | 11/12/1996 |
| 5567219 | Polyimide coated heavy metal fluoride glass fiber and method of manufacture A method of making a polyimide coated heavy metal fluorinated fiber includes the steps of drawing an optical fiber through a low-temperature curing polyimide solution to form a polyimide coating which cures in a range of about 200° and 390° C. A low cur... | 10/22/1996 |
| 5560759 | Core insertion method for making optical fiber preforms and optical fibers fabricated therefrom A method and apparatus are provided for forming a glass preform which can be directly drawn into a single or multi-mode optical fiber. Single or multi-mode fibers drawn from the preforms described herein have high quality core-clad interfaces since the co... | 10/01/1996 |
| 5454847 | Vapor deposition method for depositing a film of fluorine-containing glass on a substrate A deposition method for vapor deposition of a film of fluorine-containing glass on a substrate in which said substrate is put into contact with fluxs of the vapors of the various constituents of said glass, wherein said vapor fluxs are emitted simultaneou... | 10/03/1995 |
| 5401289 | Method of making halide fibers including casting under a reduced pressure Halide glass articles, e.g. rods, tubes and preforms for making fluoride glass fibres, are prepared by melting and/or casting the articles under a low pressure, e.g. 0.01 to 500 mbars and, during the low pressure regime, a gas flow rate of between 0.01 to... | 03/28/1995 |
| 5356448 | Method of making a preform for an optical fiber A method of making a preform for an optical fiber, in which method a plurality of layers of fluoride glass are deposited inside a support tube (10); said layers (14) are deposited by laser ablation in a controlled atmosphere using a target (12) having the... | 10/18/1994 |
| 5350433 | Method of manufacturing a cylindrical part from glass, especially from fluorinated glass by maintaining a thin gaseous film around the cylinder In a method of manufacturing a cylindrical part from glass, especially but not exclusively fluorinated glass, a vertical cylindrical cavity is lined with a porous material and its inside dimensions are a few tens of microns greater than those of the part.... | 09/27/1994 |
