1
Gouez Benoit, Ripoche Pierre: Process for making optical fibre preform employing plasma deposition. Alcatel, Alcatel Fibres Optiques, July 3, 1996: EP0719738-A2 (15 worldwide citation)

A fibre optical preform is produced using a recharged plasma. The process comprises the axial modulation of at least one pass of the recharged plasma for improvement of the opto-geometric properties of the preformer. By preference, the modulation is placed during latter passes of the recharged plasm ...


2
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 ...


3
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 ...


4
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.


5
Jouvenel Bernard, Ripoche Pierre: Induction plasma torch. Alcatel Fibres Optiques, January 24, 1996: EP0693865-A1 (3 worldwide citation)

An induction plasma torch for making optical fibre preforms of pure or doped silica comprises a reaction tube (2) where the plasma (8) is formed, tube (2) being encircled by an induction coil (7) and protected against thermal shocks by an inner lining (9) less than 2 mm thick and comprising mainly s ...


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 ...