Prysmian Cavi E Sistemi Energia S.r.l.

Pirelli Cavi E Sistemi S.p.a.

Pirelli & C. S. P. A.

Dsm IP Assets B.v.

Pirelli Tyre S.p.a.

Prysmian S.p.a.

Marco Arimondi

Luca Castellani

Enrico Albizzati

Giacomo Stefano Roba

Thomas Hanel

Lidia Terruzzi

Franco Veronelli

Sabrina Fogliani

Johannes Adrianus Van Eekelen

Adrianus Gijsbertus Maria Abel

Gouke Dirk Jan Geus

Sandra Joanna Nagelvoort

Duurt Pieter Alkema

Gouke Dirk Geus

Adrianus Gijsbertus Abel

Andrea Macchetta

Daniela Asnaghi

Donata Piccolo

Duurt Pleter Willem Alkema

Duurt Pleter Willem Alklma

Anna Castaldo

Ilenia Santi

Marco Galante

Duurt Pieter Willem Alkema

Joannes Adrianus Van Eekelen

Guojun Dai

In a process for manufacturing a micro-structured optical fibre, an intermediate preform is made by forming a sol; pouring the sol in a cylindrical mould including a set of structural generating elements defining internal structural elements of the intermediate preform; transforming the sol into a gel so as to obtain a cylindrical gel body defining the intermediate preform; and removing the cylindrical intermediate preform from the mould.

Process for manufacturing a micro-structured optical fibre

A method and device for vaporizing a liquid reactant. A vaporizing plate having a top surface defines a liquid flow channel, the channel being laterally delimited by edges having a height greater than a minimum thickness of liquid reactant required to generate vapor under film or nucleate boiling regime. A heating system is associated to the vaporizing plate for heating the liquid reactant over a minimum temperature required to generate vapor under nucleate or, preferably, film boiling regime. A cap covers the vaporizing plate to collect the vapor at a predetermined pressure and provided with a vapor exit and a liquid feeder feeds the liquid reactant onto the vaporizing plate.

Method for vaporizing a liquid reactant in manufacturing a glass preform

An intermediate polymer preform of elongated shape for manufacturing a microstructured optical fibre is made from a mould with a tubular par containing a pattern of hole generating elements (wires, rods or tubes) extending along it. The hole generating elements are releasably attached to an upper and to a lower base of the mould. The mould is cleaned by circulating a filtered solvent in it. The mould is filled with a fluid polymer optical material or polymer precursor. The polymer material or precursor is consolidated so that it cannot change its shape under operating stress conditions at ambient temperature. The hole generating elements are released from the upper and lower base. The consolidated core preform is extracted from the mould. The process can further include calibrating the intermediate preform.

Optical fiber capable of controlling attenuation losses caused by microbending on the signal transmitted thereby. The optical fiber comprises: a) an internal glass portion; b) a first coating layer of a first polymeric material surrounding said glass portion; and c) a second coating layer of a second polymeric material surrounding said first coating layer, wherein said first polymeric material has a hardening temperature lower than &#x2212;10&#xb0; C., an equilibrium tensile modulus lower than 1.5 MPa, wherein said first coating layer has a thickness of from 18 &#x3bc;m to 28 &#x3bc;m and wherein said second coating layer has a thickness of from 10 &#x3bc;m to 20 &#x3bc;m.

Optical fiber

A method for controlling attenuation losses caused by microbending on the signal transmitted by an optical fiber having an internal glass portion. A first coating layer of a first polymeric material surrounds the glass portion and a second coating layer of a second polymeric material surrounds the first coating layer. The first polymeric material has a hardening temperature lower than 10&#xb0; and an equilibrium modulus lower than 1.5 MPa.

Method for controlling microbending induced attenuation losses in an optical fiber

A method for manufacturing a glass preform includes supplying a first gaseous or vapor phase composition to a reaction chamber; supplying water as a second gaseous or vapor phase composition to the reaction chamber; reacting the water and the first gaseous or vapor phase composition to form an aerosol of glass particles; directing the aerosol along the reaction chamber, out of the reaction chamber, and toward a target; and depositing glass particles of the aerosol onto the target. The first gaseous or vapor phase composition is disposed to provide a hydrolyzable glass precursor. Walls of the reaction chamber have a temperature gradient in which a temperature of the walls increases in a direction of flow of the aerosol along the reaction chamber. Alternatively, a flow of the aerosol along the reaction chamber has a temperature gradient in which a temperature of the aerosol increases in the direction of flow.

Method of forming an optical fiber preform by combustionless hydrolysis

Process for producing silica by decomposition of an organosilane

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Pavia, Italy

Marco Arimondi