Draka Fibre Technology B.v.

Draka Comteq B.v.

Momentive Performance Materials Gmbh

Plasma Optical Fibre B.v.

Dennis Robert Simons

Frans Gooijer

Rob Hubertus Matheus Deckers

Igor Milicevic

Antonius Henricus Elisabeth Breuls

Eric Aloysius Kuijpers

Ivo Flammer

Cedric Gonnet

Larry Qiang Zeng

Guangjun Xu

Jelle Philip Terpsma

Henrikus Lambertus Maria Jansen

Mattheus Jacobus Nicolaas Van Stralen

Martinus Johannes Marinus Jozeph Swarts

Henrikus L M Jansen

Cédric Gonnet

Arnold Bloemendal

Henrikus Kambertus Maria Jansen

The present invention relates to a method for manufacturing a preform for optical fibers, wherein deposition of glass-forming compounds on the substrate takes place. The present invention furthermore relates to a method for manufacturing optical fibers, wherein one end of a solid preform is heated, after which an optical fiber is drawn from said heated end.

Method of manufacturing an optical fibre preform

Disclosed is a method of heat treating quartz glass deposition tubes at between 900&#xb0; C. and 1200&#xb0; C. for at least 115 hours. The resulting deposition tubes are useful in forming optical preforms that can yield optical fibers having reduced added loss.

Glass-tube extended-baking process

The present invention relates to a method for manufacturing a preform for optical fibers, wherein deposition of glass-forming compounds on the substrate takes place. The present invention furthermore relates to a method for manufacturing optical fibers, wherein one end of a solid preform is heated, after which an optical fibre is drawn from said heated end.

Method for manufacturing a preform for optical fibres

Extended-baking process for glass deposition tubes

A device for applying, in use, electromagnetic microwave radiation in a plasma cavity. The device includes a plasma cavity present within a housing, being substantially cylindrically symmetric about a first axis, and which plasma cavity includes a cylindrical wall provided with a circumferential slit. The plasma cavity is in communication, via the slit, with a first end of an elongated microwave guide having a longitudinally extending second axis. The device is in communication in use with a microwave generating device via the other end of the microwave guide, in which the electromagnetic microwave radiation being generated may include several modes, where the device can, in use, generate microwave radiation in the slit, which microwave radiation has only one electromagnetic field distribution at least in one direction perpendicularly to the propagation direction of the microwave radiation in the microwave guide.

Device for applying electromagnetic microwave radiation in a plasma cavity

The present invention relates to a method of manufacturing an optical fiber by carrying out one or more chemical vapor deposition reactions in a substrate tube, with the optical fiber exhibiting a low sensitivity to the hydrogen-induced attenuation losses at a transmission wavelength of 1550 nm. The present invention furthermore relates to an optical fiber comprising a cladding layer and a light-conducting core, which fiber has been obtained by using the present method.

Optical fiber and method of manufacturing an optical fiber

A preform for manufacturing an optical fibre or an optical fiber, where the variation in the refractive index contrast of the preform does not exceed an absolute value of 2%, measured for a preform having a length of at least 60 cm, or the deviation of the preform in relation to the average value of the profile parameter &#x3b1; does not exceed an absolute value of 0.03, measured for a preform having a length of at least 80 cm. The optical fibre has a deviation from the average value of the profile shape parameter &#x3b1; of maximally about 0.03.

Method for the production of an optical fibre, preform, and an optical fibre

The present invention relates to a method for manufacturing a bar-shaped preform. The present invention further relates to a method for manufacturing optical fibers using the manufactured bar-shaped preform.

Method for manufacturing a bar-shaped preform as well as a method for manufacturing optical fibres from such a bar-shaped preform

The present invention relates to a method of manufacturing a solid preform by moving a heat source parallel to the longitudinal axis of a substrate tube, whose inner surface is coated with one or more doped or undoped glass layers, so as to collapse the substrate tube into the solid preform in a number of passes, with an etchant being supplied to the interior of the substrate tube after a number of passes of the heat source.

Method of manufacturing a solid preform

The present invention relates to a method of manufacturing an optical fiber, which method comprises the following steps: In addition to that, the present invention relates to a preform for manufacturing an optical fiber, as well as to an optical fiber.

The present invention relates to a method for the manufacture of a single mode optical fibre comprising a light-conductive core portion, an internal cladding portion surrounding said core portion and a jacketing portion surrounding said internal cladding portion, in which the refractive index of the core portion is larger than those of the cladding and jacketing portion areas, and in which the refractive indices of the cladding and jacketing portion areas are practically equal.

Single mode optical fibre, and method for the manufacture of a single mode optical fibre

The present invention relates to a method for producing a preform, which is substantially free of OH impurities, for an optical fiber, wherein one or more quartz layers, which may or may not be doped, are deposited on the internal surface of a quartz glass support tube, in which method a furnace is moved axially with respect to the support tube, and after the quartz layers have been deposited the support tube is contracted into a bar-shaped preform while being heated, wherein the furnace comprises an electrical resistance furnace, in which furnace the support tube is rotated, with the space between the rotating support tube and the furnace being washed with an inert gas.

MCVD/PCVD method for making a preform with movement of a furnace

The invention relates to a device for manufacturing a preform, wherein a carrier tube is collapsed to a preform, which device comprises a heating element forming a cylindrical envelope, which envelope defines an annular inlet opening and an annular outlet opening at opposite ends of the envelope, a carrier tube being present within the cylindrical envelope, between said openings, the heating element being movable in axial direction with respect to the carrier tube, and means for supplying a non-oxidizing gas to the space between the carrier tube and the envelope.

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Eindhoven, Netherlands

Dennis Robert Simons