1
Drouart Alain, Gouez Benoit, Lumineau Yves, Ripoche Pierre, Campion Jean Florent: Process for purifying natural or synthetic silica and depositing purified silica on an optical fibre preform. Alsthom Cge Alcatel, September 9, 1998: EP0863108-A1 (9 worldwide citation)

A natural or synthetic silica purification method involves supplying a plasma or flame (4) with silica grains (11) from a first feed pipe (9) and with a chlorinated or preferably fluorinated compound in a carrier gas (15) from a second feed pipe (13), the feed conditions of the two pipes (9, 13) bei ...


2
Drouart Alain, Gouez Benoit, Ripoche Pierre: Process and apparatus for producing preforms for glass fibres. Alsthom Cge Alcatel, November 4, 1998: EP0875489-A1 (8 worldwide citation)

A method is claimed for the fabrication of glass fibre preforms. The method consists of rotating a preformer (10) around its axis (12), displacing it in translation relative to a plasma blowtorch (14), in a direction parallel to the axis (12) of the preformer, the axes (20) of the flame (18) and (12 ...


3
Drouart Alain, Gouez Benoit, Jouvenel Bernard, Lumineau Yves, Matau Max, Ripoche Pierre: Process of plasma recharging a preform for optical fibre and optical fibre made from recharged preform produced by this method.. Alcatel Fibres Optiques, June 21, 1995: EP0658520-A1 (7 worldwide citation)

The process for plasma recharging a preform (P) for optical fibre is characterised in that it consists in introducing hydroxyl ions in a controlled manner into the recharge silica deposited on the said preform (P). Application: optical fibre, in particular single-mode.


4
Drouart Alain, Matau Max, Mazabraud Pascal: Apparatus for drawing an optical fibre from a preform. Alcatel Fibres Optiques, October 29, 1997: EP0803478-A1 (6 worldwide citation)

Device is used for the fibrillation of a preformer (2) of an optical fibre in a vitreous material fitted to one end of a terminal (3) of diameter less than or equal to the diameter of the preformer. The device comprises: (a) means (10) for retaining the preformer (2) essentially vertical by the inte ...


5
Le Sergent Christian, Drouart Alain: Method of making light guides.. Lyonnaise Transmiss Optiques, April 25, 1984: EP0106752-A1 (5 worldwide citation)

Procédé de fabrication de guides d'ondes lumineuses comportant une couche-support plane en un matériau d'indice de réfraction relativement faible, une couche plane de propagation des ondes lumineuses en un matériau d'indice de réfraction plus élevé que celui de la couche-support, enserrée entre deux ...


6
Drouart Alain, Gouez Benoit, Lumineau Yves, Ripoche Pierre, Campion Jean Florent: Process for purifying silica and use for depositing the purified silica on an optical fibre preform. Cit Alcatel, February 23, 2000: EP0980849-A1 (3 worldwide citation)

Process for purifying natural or synthetic silica comprises using a plasma or a flame (4), a supply of calorific energy (3) and a supply unit (9) of natural or synthetic silica grains (11), also supplying a fluorinated or chlorinated compound mixed with a carrier gas (15). Supply conditions are adju ...


7
Ripoche Pierre, Drouart Alain, Humbert Patrick: Process and device for manufacturing optical fibre preforms. Cit Alcatel, July 4, 2001: EP1112975-A1 (3 worldwide citation)

Production of preform for making an optical fiber involves increasing the diameter of a primary preform (10) by injection (24) of grains on its surface and fixing the grains using a plasma torch comprising a refractory material tube (16) and an inductor (22) around the tube. The distance between the ...


8
Drouart Alain, Gouez Benoit, Lumineau Yves, Campion Jean Florent, Ripoche Pierre: Process for purifying natural or synthetic silica and depositing purified silica on an optical fibre preform. Alcatel Fibres Optiques, September 11, 1998: FR2760449-A1 (2 worldwide citation)

A natural or synthetic silica purification method involves supplying a plasma or flame (4) with silica grains (11) from a first feed pipe (9) and with a chlorinated or preferably fluorinated compound in a carrier gas (15) from a second feed pipe (13), the feed conditions of the two pipes (9, 13) bei ...


9
Wurier Bernard, Drouart Alain, Ripoche Pierre: Soldering the ends of optical preforms together by means of a plasma torch. Cit Alcatel, October 20, 1999: EP0950643-A1 (2 worldwide citation)

Heating is carried out by effecting a relative displacement of the heating system (15) w.r.t. the ends of the preforms following a radial direction orthogonal to the common longitudinal axis (A) in a manner that heats the periphery (7B, 9B), then the center of the preforms. End-to-end assembly of tw ...


10
Ripoche Pierre, Drouart Alain, Gouez Benoit: Process for manufacturing an optical fibre preform by external deposition of silica, optionally doped. Cit Alcatel, September 13, 2000: EP1035081-A1 (1 worldwide citation)

An optical fiber preform production process, comprising regulation of the relative positions of an injector (5) and a heater (4) during one or more passes along a preform (3), is new. An optical fiber preform production process comprises external deposition of optionally doped silica by one or more ...