FR2712280A1 - Mfr. optical fibre multi-connector - Google Patents

Mfr. optical fibre multi-connector Download PDF

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Publication number
FR2712280A1
FR2712280A1 FR9313261A FR9313261A FR2712280A1 FR 2712280 A1 FR2712280 A1 FR 2712280A1 FR 9313261 A FR9313261 A FR 9313261A FR 9313261 A FR9313261 A FR 9313261A FR 2712280 A1 FR2712280 A1 FR 2712280A1
Authority
FR
France
Prior art keywords
blades
multiferule
slip
plates
equal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR9313261A
Other languages
French (fr)
Other versions
FR2712280B1 (en
Inventor
Campion Jean-Florent
Darbon Philippe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nexans Interface SA
Original Assignee
Alcatel Cable Interface
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alcatel Cable Interface filed Critical Alcatel Cable Interface
Priority to FR9313261A priority Critical patent/FR2712280B1/en
Publication of FR2712280A1 publication Critical patent/FR2712280A1/en
Application granted granted Critical
Publication of FR2712280B1 publication Critical patent/FR2712280B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3834—Means for centering or aligning the light guide within the ferrule
    • G02B6/3838—Means for centering or aligning the light guide within the ferrule using grooves for light guides
    • G02B6/3839—Means for centering or aligning the light guide within the ferrule using grooves for light guides for a plurality of light guides
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/06—Other methods of shaping glass by sintering, e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/06—Other methods of shaping glass by sintering, e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction
    • C03B19/066—Other methods of shaping glass by sintering, e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction for the production of quartz or fused silica articles
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/12—Other methods of shaping glass by liquid-phase reaction processes
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B20/00—Processes specially adapted for the production of quartz or fused silica articles, not otherwise provided for
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
    • G02B6/3862—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule radially-compressed, longitudinally-split ferrules consisting of a pair of identical matching halves

Abstract

Prodn. of a silica glass multi-connector with several parallel channels involves subjecting two adjoining embossed plates to densification heat treatment at 1300-1450<0> C for 1-3 hrs. in a vacuum or a helium atmos., the embossed plates being formed by: (a) preparing a slip contg. at least 50 wt.% synthetic silica of specific surface at least 40 sq.m/g. and as additive, at least 2 wt.% ammonium (hydrogen) fluoride or more than 0.1 mol/l. hydrofluoric acid; (b) pouring the slip into plate-forming moulds; (c) setting at ambient temp. until contraction of the resulting gel plates has terminated; (d) applying imprints in the form of parallel U- or V-grooves to the free surface of the plates; and (e) drying the embossed plates for at least 8 hrs. at max. 60<0> C in an air stream. Also claimed is a multi-connector made by the above process.

Description

Procédé de réalisation d'une multiférule en verre de silice t > our fibre optique. et multiférule ainsi obtenue
La présente invention concerne un procédé de réalisation d'une multiférule en verre de silice pour fibre optique.Process for producing a silica glass multiferule t> our optical fiber. and multiferule thus obtained
The present invention relates to a method for producing a silica glass multiferule for optical fibers.

On sait que le raccordement de fibres optiques, pour télécommunications par exemple, nécessite un guidage des extrémités de ces fibres permettant d'atteindre une grande précision d'alignement. It is known that the connection of optical fibers, for telecommunications for example, requires guidance of the ends of these fibers making it possible to achieve high alignment precision.

Dans l'art antérieur, ces multiférules étaient habituellement réalisées de manière individuelle en céramique usinée, ce qui est complexe et onéreux. In the prior art, these multiferules were usually made individually from machined ceramic, which is complex and expensive.

En outre, le fait que la multiférule ait un indice optique différent de celui des fibres entraine des phénomènes de réflexions de Fresnel qui constituent des réflexions parasites gênantes.In addition, the fact that the multiferule has an optical index different from that of the fibers gives rise to Fresnel reflection phenomena which constitute disturbing parasitic reflections.

On a proposé plus récemment dans les brevets
FR-A-2669119 et FR-A-2680879 de partir d'une ébauche en matériau vitreux de section bien définie dans laquelle ont été précisément usinés des alésages cylindriques, d'axes parallèles entre eux; on dispose ensuite cette ébauche verticalement dans une installation du même type qu'une installation de fibrage pour fibres optiques et on effectue un étirage de manière à obtenir une multiférule aux dimensions souhaitées.More recently it has been proposed in patents
FR-A-2669119 and FR-A-2680879 to start from a blank in vitreous material of well-defined section in which have been precisely machined cylindrical bores, with axes parallel to each other; this blank is then placed vertically in an installation of the same type as a fiber drawing installation for optical fibers and drawing is carried out so as to obtain a multiferule of the desired dimensions.

Le problème qui se pose est le coût de l'usinage préalable des alésages cylindriques de l'ébauche. The problem which arises is the cost of the preliminary machining of the cylindrical bores of the blank.

La présente invention a pour but de proposer un procédé moins coûteux que les procédés précédents, et permettant d'obtenir directement des multiférules en silice. The object of the present invention is to propose a process which is less expensive than the preceding processes, and which makes it possible to directly obtain multiferules in silica.

La présente invention a pour objet un procédé de réalisation d'une multiférule en verre de silice comprenant une pluralité de canaux parallèles entre eux, caractérisé par le fait - que l'on réalise d'abord deux lames gravées de la manière suivante:
préparation d'une barbotine comportant au moins 50% en
poids de silice synthétique, de surface spécifique au
moins égale à 40m2/gramme, et un additif choisi parmi le
fluorure d'ammonium, le bifluorure d'ammonium, dans une
proportion supérieure ou égale à 2% en poids, ou l'acide
fluorhydrique dans une proportion supérieure à 0,1 mole
par litre,
coulée de ladite barbotine respectivement dans deux
moules dont le fond et les parois latérales ont la forme
desdites lames,
prise en masse à la température ordinaire jusqu'à ce
que la contraction des deux lames de gel obtenues soit
terminée,
- application sur la surface libre desdites lames d'une
empreinte présentant des nervures longitudinales
parallèles à section en U ou en V,
- séchage des lames gravées pendant au moins huit heures
à une température inférieure ou égale à 60'C sous
balayage d'air, - que l'on applique les deux lames gravées l'une contre l'autre de manière à former une multiférule, - et que l'on effectue un traitement thermique de densification entre 1300-C et 1450 pendant une durée comprise entre une et trois heures sous vide ou sous atmosphère d 'hélium. The present invention relates to a process for producing a silica glass multiferule comprising a plurality of mutually parallel channels, characterized in that - that two plates are first produced etched as follows:
preparation of a slip comprising at least 50% in
weight of synthetic silica, specific surface area
less equal to 40m2 / gram, and an additive chosen from
ammonium fluoride, ammonium bifluoride, in a
proportion greater than or equal to 2% by weight, or the acid
hydrofluoric in a proportion greater than 0.1 mol
per liter,
casting of said slip respectively in two
molds with the bottom and side walls of the form
said blades,
solidification at room temperature until
that the contraction of the two gel blades obtained is
finished,
- application on the free surface of said blades of a
cavity with longitudinal ribs
parallel with U or V section,
- drying of the engraved slides for at least eight hours
at a temperature less than or equal to 60 ° C under
air sweep, - that the two etched blades are applied against each other so as to form a multiferule, - and that a densification heat treatment is carried out between 1300-C and 1450 for a period of between one and three hours under vacuum or in a helium atmosphere.

Lors de la prise en masse des deux lames on peut contrôler qu'on est parvenu à la fin de la contraction du gel par une mesure des dimensions de ces lames. A ce stade les lames présentent une surface libre tout à fait lisse et leur viscosité rend encore possible l'impression par une empreinte. When the two plates have solidified, it is possible to check that the end of the contraction of the gel has been reached by measuring the dimensions of these plates. At this stage the slides have a completely smooth free surface and their viscosity still makes imprinting possible.

Les moules utilisés peuvent être en polypropylène ou analogue. The molds used can be made of polypropylene or the like.

Lors du traitement de densification, les deux lames gravées se solidarisent au niveau de toutes leurs surfaces en contact et définissent une multiférule de densité 2,2, directement utilisable. During the densification treatment, the two etched blades are joined at the level of all their contacting surfaces and define a multiferule of density 2.2, which can be used directly.

D'autres caractéristiques et avantages de la présente invention apparaîtront au cours de la description suivante d'un mode de réalisation donné à titre illustratif, mais nullement limitatif. Dans le dessin annexé: - La figure 1 montre très schématiquement la coulée d'une barbotine dans un moule en vue de la réalisation d'une demimultiférule. Other characteristics and advantages of the present invention will emerge from the following description of an embodiment given by way of illustration, but in no way limiting. In the appended drawing: - Figure 1 shows very schematically the casting of a slip in a mold with a view to producing a demimultiférule.

- La figure 2 montre la barbotine après la prise en masse et l'obtention d'une lame.- Figure 2 shows the slip after setting and obtaining a blade.

- La figure 3 illustre schématiquement l'impression de la surface de la lame de la figure 2 avec une empreinte.- Figure 3 schematically illustrates the printing of the surface of the blade of Figure 2 with an imprint.

- La figure 4 montre un détail de l'empreinte de la figure 3.- Figure 4 shows a detail of the footprint of Figure 3.

- La figure 5 montre une multiférule selon l'invention après l'opération de densification.- Figure 5 shows a multiferule according to the invention after the densification operation.

On réalise une barbotine en dispersant 600 grammes de silice pyrogénée vendue sous le nom de AEROSIL 0x-50 par la
Société DEGUSSA, dans 300 grammes d'eau désionisée. Le silice a une surface spécifique de 50 m2 par gramme.A slip is produced by dispersing 600 grams of fumed silica sold under the name AEROSIL 0x-50 by the
DEGUSSA company, in 300 grams of deionized water. Silica has a specific surface area of 50 m2 per gram.

La dispersion est effectuée dans un mélangeur de type turbosphère, vendu par la Société MORITZ. The dispersion is carried out in a turbosphere type mixer, sold by the company MORITZ.

On ajoute à la barbotine 2 grammes de fluorure d'ammonium; on pourrait remplacer cet additif par la même quantité de bifluorure d'ammonium ou par l'acide fluorhydrique dans une proportion supérieure à 0,1 mole par litre. 2 grams of ammonium fluoride are added to the slip; this additive could be replaced by the same quantity of ammonium bifluoride or by hydrofluoric acid in a proportion greater than 0.1 mole per liter.

On coule la barbotine dans des moules 1 en une matière plastique, telle que le polypropylène; un exemple est schématiquement illustré dans la figure 1. The slip is poured into molds 1 made of a plastic material, such as polypropylene; an example is schematically illustrated in figure 1.

Ce moule 1 est une boîte parallélépipédique de dimensions 4mm x 40mm x 60mm. On le nettoie soigneusement à l'alcool pour éliminer tout point d'accrochage et on le remplit de la barbotine 2 précédemment préparée. This mold 1 is a parallelepipedal box of dimensions 4mm x 40mm x 60mm. It is carefully cleaned with alcohol to eliminate any sticking point and it is filled with the previously prepared slip 2.

La barbotine prend en masse et, au bout d'une quinzaine de minutes, elles s'est complètement contractée, et apparaît dans la figure 2 comme une lame 3 dont la surface supérieure 4 est parfaitement lisse. La contraction maximale de la lame 3 peut être contrôlée par une mesure de ses dimensions qui peut être faite par un dispositif automatique de capteurs, ou de manière empirique par comparaison avec une dimension repère schématisé en 10. The slurry solidifies and, after about fifteen minutes, it has contracted completely, and appears in FIG. 2 as a blade 3, the upper surface 4 of which is perfectly smooth. The maximum contraction of the blade 3 can be controlled by measuring its dimensions which can be made by an automatic sensor device, or empirically by comparison with a reference dimension shown schematically at 10.

Lorsque la lame 3 a atteint cet état, elle présente une viscosité telle qu'elle peut supporter l'impression par une empreinte 6 sur sa face 4, sans pour autant s'étaler dans le moule 1. Cette empreinte 6 en plexiglass, liée à une presse 7, comprend trois nervures 8, dont une est visible en coupe agrandie dans la figure 4. Elle a un profil transversal en V, l'angle du V étant égal à 140' et sa hauteur égale à 0,3mm. When the blade 3 has reached this state, it has a viscosity such that it can withstand the impression by an imprint 6 on its face 4, without however spreading out in the mold 1. This plexiglass imprint 6, linked to a press 7 comprises three ribs 8, one of which is visible in enlarged section in FIG. 4. It has a transverse V-shaped profile, the angle of the V being equal to 140 'and its height equal to 0.3mm.

On effectue alors un séchage sous air à 40'C pendant au moins huit heures. Drying is then carried out in air at 40 ° C. for at least eight hours.

Deux lames 5 et 5' munies de leurs sillons en V sont accolées comme indiqué en coupe par la figure 5, de manière à définir une pièce en forme de multiférule à trois canaux parallèles 9 à section en forme de losange. Two blades 5 and 5 'provided with their V-shaped grooves are placed side by side as shown in section in FIG. 5, so as to define a part in the form of a multiferule with three parallel channels 9 with a diamond-shaped section.

Cet ensemble subit alors un traitement de densification à 1400'C pendant deux heures sous balayage d'hélium. This assembly then undergoes a densification treatment at 1400 ° C. for two hours under helium scavenging.

Lors du traitement les deux pièces 5 et 5' se solidarisent au niveau de leurs surfaces de contact, et leur densité devient égale à 2,2. During the treatment, the two parts 5 and 5 'become united at their contact surfaces, and their density becomes equal to 2.2.

On obtient une multiférule en silice dense transparente comportant trois canaux ayant deux angles à 140' et une diagonale égale à 0,2mm. A transparent dense silica multiferule is obtained comprising three channels having two angles at 140 ′ and a diagonal equal to 0.2 mm.

Bien entendu l'invention n'est pas limitée au mode de réalisation qui vient d'être décrit, notamment au niveau de la composition de la barbotine, du choix du matériau des moules, ou de la forme des sillons. Of course, the invention is not limited to the embodiment which has just been described, in particular as regards the composition of the slip, the choice of the material of the molds, or the shape of the grooves.

Claims (3)

REVENDICATIONS 1/ Procédé de réalisation d'une multiférule en verre de silice comprenant une pluralité de canaux parallèles, caractérisé par le fait - que l'on réalise d'abord deux lames gravées de la manière suivante:1 / A method of making a silica glass multiferule comprising a plurality of parallel channels, characterized in that - that two blades etched in the following manner are first produced: - préparation d'une barbotine comportant au moins 50% en - preparation of a slip comprising at least 50% in poids de silice synthétique, de surface spécifique au weight of synthetic silica, specific surface area moins égale à 40m2/gramme, et un additif choisi parmi le less equal to 40m2 / gram, and an additive chosen from fluorure d'ammonium, le bifluorure d'ammonium, dans une ammonium fluoride, ammonium bifluoride, in a proportion supérieure ou égale à 2% en poids, ou l'acide proportion greater than or equal to 2% by weight, or the acid fluorhydrique dans une proportion supérieure à 0,1 mole hydrofluoric in a proportion greater than 0.1 mol par litre, per liter, coulée de ladite barbotine respectivement dans deux casting of said slip respectively in two moules dont le fond et les parois latérales ont la forme molds with the bottom and side walls of the form desdites lames, said blades, prise en masse à la température ordinaire jusqu'à ce solidification at room temperature until que la contraction des deux lames de gel obtenues soit that the contraction of the two gel blades obtained is terminée, finished, application sur la surface libre desdites lames d'une application on the free surface of said blades of a empreinte présentant des nervures longitudinales cavity with longitudinal ribs parallèles à section en U ou en V, parallel with U or V section, séchage des lames gravées pendant au moins huit heures drying the etched slides for at least eight hours à une température inférieure ou égale à 60'C sous at a temperature less than or equal to 60 ° C under balayage d'air, - que l'on applique les deux lames gravées l'une contre l'autre de manière à former une multiférule, - et que l'on effectue un traitement thermique de densification entre 1300in et 1450' pendant une durée comprise entre une et trois heures sous vide ou sous atmosphère d'hélium. air sweep, - that the two etched blades are applied against each other so as to form a multiferule, - and that a densification heat treatment is carried out between 1300in and 1450 'for a period of time between between one and three hours under vacuum or in a helium atmosphere. 2/ Procédé selon la revendication 1, caractérisé par le fait que, pour déterminer la fin de la contraction desdites lames, on effectue un contrôle de leurs dimensions.2 / A method according to claim 1, characterized in that, to determine the end of the contraction of said blades, a control of their dimensions is carried out. 3/ Multiférule obtenue par la mise en oeuvre du procédé selon l'une des revendications précédentes. 3 / Multiferule obtained by implementing the method according to one of the preceding claims.
FR9313261A 1993-11-08 1993-11-08 Method for producing a multiferule in silica glass for optical fiber, and multiferule thus obtained. Expired - Fee Related FR2712280B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9313261A FR2712280B1 (en) 1993-11-08 1993-11-08 Method for producing a multiferule in silica glass for optical fiber, and multiferule thus obtained.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9313261A FR2712280B1 (en) 1993-11-08 1993-11-08 Method for producing a multiferule in silica glass for optical fiber, and multiferule thus obtained.

Publications (2)

Publication Number Publication Date
FR2712280A1 true FR2712280A1 (en) 1995-05-19
FR2712280B1 FR2712280B1 (en) 1995-12-29

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Country Link
FR (1) FR2712280B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0899242A2 (en) * 1997-08-29 1999-03-03 Hoya Corporation Preform for an optical fibre fixing member and process for the production thereof
WO2016045907A1 (en) * 2014-09-24 2016-03-31 Ev Group E. Thallner Gmbh Method for producing an optical glass element

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63225536A (en) * 1987-03-13 1988-09-20 Seiko Instr & Electronics Ltd Production of substrate for optical disk
JPH01100032A (en) * 1987-10-12 1989-04-18 Seiko Epson Corp Production of glass body
EP0392599A2 (en) * 1989-04-11 1990-10-17 Philips Patentverwaltung GmbH Method of manufacturing glass bodies with areas of different optical refraction
FR2669119A1 (en) * 1990-11-08 1992-05-15 Alcatel Cable Method of manufacturing multiferrules which include a series of cylindrical channels having parallel axes, and multiferrule arising from this method
FR2680879A1 (en) * 1991-08-30 1993-03-05 Alsthom Cge Alcatel Method of manufacturing ferrule or multiferrule blanks, and blanks obtained by this method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63225536A (en) * 1987-03-13 1988-09-20 Seiko Instr & Electronics Ltd Production of substrate for optical disk
JPH01100032A (en) * 1987-10-12 1989-04-18 Seiko Epson Corp Production of glass body
EP0392599A2 (en) * 1989-04-11 1990-10-17 Philips Patentverwaltung GmbH Method of manufacturing glass bodies with areas of different optical refraction
FR2669119A1 (en) * 1990-11-08 1992-05-15 Alcatel Cable Method of manufacturing multiferrules which include a series of cylindrical channels having parallel axes, and multiferrule arising from this method
FR2680879A1 (en) * 1991-08-30 1993-03-05 Alsthom Cge Alcatel Method of manufacturing ferrule or multiferrule blanks, and blanks obtained by this method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 21 (C - 560) 18 January 1989 (1989-01-18) *
PATENT ABSTRACTS OF JAPAN vol. 13, no. 315 (C - 619) 18 July 1989 (1989-07-18) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0899242A2 (en) * 1997-08-29 1999-03-03 Hoya Corporation Preform for an optical fibre fixing member and process for the production thereof
EP0899242A3 (en) * 1997-08-29 1999-06-09 Hoya Corporation Preform for an optical fibre fixing member and process for the production thereof
WO2016045907A1 (en) * 2014-09-24 2016-03-31 Ev Group E. Thallner Gmbh Method for producing an optical glass element
TWI679098B (en) * 2014-09-24 2019-12-11 奧地利商Ev集團E塔那有限公司 Method for the production of an optical glass element
US10519057B2 (en) 2014-09-24 2019-12-31 Ev Group E. Thallner Gmbh Method for the production of an optical glass element

Also Published As

Publication number Publication date
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