FR2488698A1 - Assembly process for optical fibre cables - uses carrier with groove of width greater than dia. of cable and having depth greater than or equal to dia. - Google Patents
Assembly process for optical fibre cables - uses carrier with groove of width greater than dia. of cable and having depth greater than or equal to dia. Download PDFInfo
- Publication number
- FR2488698A1 FR2488698A1 FR8017842A FR8017842A FR2488698A1 FR 2488698 A1 FR2488698 A1 FR 2488698A1 FR 8017842 A FR8017842 A FR 8017842A FR 8017842 A FR8017842 A FR 8017842A FR 2488698 A1 FR2488698 A1 FR 2488698A1
- Authority
- FR
- France
- Prior art keywords
- cable
- carrier
- dia
- groove
- depth
- 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
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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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4416—Heterogeneous cables
-
- 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4407—Optical cables with internal fluted support member
-
- 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4427—Pressure resistant cables, e.g. undersea cables
-
- 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
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4489—Manufacturing methods of optical cables of central supporting members of lobe structure
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Communication Cables (AREA)
Abstract
Description
La présente invention a pour objet un dispositif d'assemblage à haute résistance pour eléments- de cables notamment à fibres. The present invention relates to a high strength assembly device for elements- cables, in particular fibers.
optiques et un cable ainsi obtenu.optics and a cable thus obtained.
I1 est connu de l'art antérieur d'utiliser des éléments de câble optiques de structure cylindrique rainurée. Chacun de ces éléments se compose d'un support à faible coefficient de dilatation thermique, autour duquel est extrudée une structure cylindrique pourvue de rainures dans lesquelles sont logées les fibres optiques. Le câbIe proprement dit est réalisé par assemblage des éléments, suivant des techniques voisines de celles utilisées en câblerie traditionnelle, en particulier pour l'assemblage des coaxiaux. Des câbles de 70 fibres ont été réalisés en structure 1 + 6 (I élément central + 6 élémentspériphériques) à partir d'éléments comportant 10 fibres.Ces cibles présentent de bonnes caractéristiques mécaniques, mais restent toutefois sensibles à des contraintes d'écrasement ou de mise sous très haute pression, la limite étant donnée par la déformation des rainures d'un élément conduisant à la mise sous contrainte de la fibre. En effet, de telles rainures doivent être réalisées avec une précision assez élevée particulièrement en ce qui concerne les flancs et doivent présenter un très bon état de surface, faute de quoi les fibres présenteraient des atténuations sensibles aux endroits où elles se trouveraient en contact avec le flanc des rainures. En pratique, de telles rainures ne peuvent ainsi pas fournir une prote tion mécanique aussi élevée qu'on le souhaiterait pour certaines applications. It is known in the prior art to use optical cable elements of grooved cylindrical structure. Each of these elements consists of a support with a low coefficient of thermal expansion, around which is extruded a cylindrical structure provided with grooves in which the optical fibers are housed. The actual cable is made by assembling the elements, according to techniques similar to those used in traditional cable, in particular for the assembly of coaxials. Cables of 70 fibers have been produced in structure 1 + 6 (I central element + 6 peripheral elements) from elements comprising 10 fibers. These targets have good mechanical characteristics, but remain sensitive to crushing or put under very high pressure, the limit being given by the deformation of the grooves of an element leading to the stressing of the fiber. Indeed, such grooves must be produced with fairly high precision, particularly with regard to the sidewalls and must have a very good surface condition, otherwise the fibers would exhibit significant attenuations at the places where they would be in contact with the side of the grooves. In practice, such grooves cannot thus provide as high mechanical protection as would be desired for certain applications.
La présente invention a pour objet un dispositif d'assemblage permettant de remédier à ces inconvénients. Une telle structure d'assemblage destinée à recevoir au moins un élément de câble à fibres optiques se caractérise par le-fait qu'elle comporte un porteur obtenu par exemple par extrusion et muni d'au moins une rainure dont la largeur 1 est supérieure au diamètre dudit câble sur une distance au moins égale audit diamètre à partir de la périphérie. The present invention relates to an assembly device making it possible to remedy these drawbacks. Such an assembly structure intended to receive at least one fiber optic cable element is characterized in that it comprises a carrier obtained for example by extrusion and provided with at least one groove whose width 1 is greater than diameter of said cable over a distance at least equal to said diameter from the periphery.
Selon un mode de réalisation, la profondeur de la rainure est supérieure à deux fois le diamètre dudit élément de câble. According to one embodiment, the depth of the groove is greater than twice the diameter of said cable element.
Suivant un mode préféré de réalisation, le porteur est extrudé et comporte au moins un support central de traction. According to a preferred embodiment, the carrier is extruded and comprises at least one central traction support.
Des éléments conducteurs peuvent être répartis dans le porteur et se substituer éventuellement au support central de traction. Conductive elements can be distributed in the carrier and possibly replace the central traction support.
Un câble selon l'invention comporte une structure d'assemblage telle que définie ci-dessus et au moins un élément de câble à fibres optiques disposé dans une rainure. A cable according to the invention comprises an assembly structure as defined above and at least one element of fiber optic cable disposed in a groove.
Dans un mode de réalisation, au moins une rainure peut être occupée par un élément de câble électrique. In one embodiment, at least one groove can be occupied by an electric cable element.
Un câble suivant Invention comporte de préférence une ceinture maintenant les éléments de câble dans les rainures, et au moins une gaine de protection. A cable according to the invention preferably comprises a belt holding the cable elements in the grooves, and at least one protective sheath.
L'invention sera mieux comprise par référence aux dessins annexés dans lesquels:
- la figure 1 représente une coupe transversale d'un câble comportant une structure d'assemblage selon l'invention;
- la figure 2 représente une coupe transversale d'un élément de câble optique.The invention will be better understood by reference to the appended drawings in which:
- Figure 1 shows a cross section of a cable comprising an assembly structure according to the invention;
- Figure 2 shows a cross section of an optical cable element.
Selon la figure 1, un assemblage suivant l'invention comporte un porteur 3 réalisé par. exemple par extrusion et muni d'au moins un support 1 à faible coefficient de dilatation thermique. According to Figure 1, an assembly according to the invention comprises a carrier 3 produced by. example by extrusion and provided with at least one support 1 with a low coefficient of thermal expansion.
Ledit porteur 3 comporte à sa périphérie au moins une rainure 11 de profondeur p et de rayon de courbure r en fond de rainure. Said carrier 3 has at its periphery at least one groove 11 of depth p and radius of curvature r at the bottom of the groove.
Selon la figure 2, un élément de câble 4 connu en soi et destiné à être disposé dans les rainures 1 1 comporte une âme 5 et une structure cylindrique 6 obtenue par exemple par extrusion et pourvue de rainures 12 dans lesquelles sont disposées des fibres optiques 7. Un rubanage extérieur 8 maintient les fibres dans les rainures 12 sans toutefois exercer de contraintes sur celles-ci. According to Figure 2, a cable element 4 known per se and intended to be disposed in the grooves 1 1 has a core 5 and a cylindrical structure 6 obtained for example by extrusion and provided with grooves 12 in which are arranged optical fibers 7 An external taping 8 holds the fibers in the grooves 12 without, however, exerting stresses on them.
Les éléments de câble 4 sont disposés dans les rainures Il de la structure d'assemblage, celles-ci présentant une largeur 1 supérieure au diamètre D de l'élément 4 sur une profondeur P au moins égale audit diamètre D. Une telle mesure assure que l'élément de câble 4 ne sera pas soumis à des contraintes. La profondeur des rainures peut être au moins égale à deux fois le diamètre de l'élément 4. Les dimensions des rainures et leur profii ne sont pas critiques étant donné qu'il s'agit dans ce cas d'un porteur mécanique qui n'est pas en contact avec les fibres optiques. On peut donc les réaliser en tenant compte uniquement des contraintes mécaniques auxquelles le câble pourrait être soumis. The cable elements 4 are arranged in the grooves II of the assembly structure, these having a width 1 greater than the diameter D of the element 4 over a depth P at least equal to said diameter D. Such a measure ensures that the cable element 4 will not be subjected to stresses. The depth of the grooves can be at least twice the diameter of the element 4. The dimensions of the grooves and their profii are not critical since it is in this case a mechanical carrier which does not is not in contact with optical fibers. They can therefore be produced taking into account only the mechanical stresses to which the cable could be subjected.
Une structure d'assemblage selon l'invention permet donc de disposer librement les éléments de câble à l'intérieur des rainures 11. L'application de contraintes extérieures importantes du type pression ou écrasement, se traduit alors uniquement par une déformation du porteur 3. An assembly structure according to the invention therefore makes it possible to freely dispose the cable elements inside the grooves 11. The application of significant external stresses of the pressure or crushing type, then only results in a deformation of the carrier 3.
Des éléments éventuellement conducteurs 2 peuvent être répartis dans le porteur 3. Ceux-ci peuvent jouer le rôle du support 1 qui n'est dans ce cas plus nécessaire. En outre, les rainures 11 peuvent servir également à disposer des éléments de câbles électriques ce qui permet de réaliser des câbles mixtes optiquesélectriques. Possible conductive elements 2 can be distributed in the carrier 3. These can play the role of the support 1 which is no longer necessary in this case. In addition, the grooves 11 can also be used to dispose of the elements of electric cables which makes it possible to produce mixed optical-electric cables.
Les éléments une fois disposés dans les rainures 11, on peut disposer une ceinture 9 autour du porteur 3, ce qui permet de maintenir les éléments de câble dans les rainures, puis appliquer une ou plusieurs gaines de protection 10 autour de l'ensemble, par exemple une enveloppe métallique soudée 14, ainsi qu'au moins une gaine plastique extérieure 13. Un tel câble est avantageux dans le cas ou les contraintes mécaniques sont très élevées, ce qui implique la nécessité de faire des concessions sur l'encombrement des câbles, par exemple dans le cas de câble sous-marins. Once the elements are arranged in the grooves 11, a belt 9 can be placed around the carrier 3, which makes it possible to hold the cable elements in the grooves, then apply one or more protective sheaths 10 around the assembly, by example a welded metal casing 14, as well as at least one outer plastic sheath 13. Such a cable is advantageous in the case where the mechanical stresses are very high, which implies the need to make concessions on the size of the cables, for example in the case of submarine cable.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8017842A FR2488698A1 (en) | 1980-08-13 | 1980-08-13 | Assembly process for optical fibre cables - uses carrier with groove of width greater than dia. of cable and having depth greater than or equal to dia. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8017842A FR2488698A1 (en) | 1980-08-13 | 1980-08-13 | Assembly process for optical fibre cables - uses carrier with groove of width greater than dia. of cable and having depth greater than or equal to dia. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2488698A1 true FR2488698A1 (en) | 1982-02-19 |
FR2488698B1 FR2488698B1 (en) | 1984-04-06 |
Family
ID=9245162
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8017842A Granted FR2488698A1 (en) | 1980-08-13 | 1980-08-13 | Assembly process for optical fibre cables - uses carrier with groove of width greater than dia. of cable and having depth greater than or equal to dia. |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2488698A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2520519A1 (en) * | 1982-01-26 | 1983-07-29 | Cables Electro Telecommunicati | Protective cable carrying optical fibre - consists of sleeve with flat diametral reinforcing strip of similar expandability as optical fibre and resistant to stress |
FR2555326A1 (en) * | 1983-11-18 | 1985-05-24 | Foptica | Optical cable especially for connection and process for manufacturing such a cable |
EP0266941A2 (en) * | 1986-11-04 | 1988-05-11 | Nortel Networks Corporation | Optical cable |
US4820014A (en) * | 1987-02-25 | 1989-04-11 | Sumitomo Electric Industries, Ltd. | Optical cable |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2288318A1 (en) * | 1974-10-15 | 1976-05-14 | Siemens Ag | COMMUNICATION CABLE WITH OPTICAL TRANSMISSION ELEMENTS |
DE2508315A1 (en) * | 1975-02-24 | 1976-09-02 | Siemens Ag | Optical cable for signal transmission - has several optical transmission elements applied on strong core of stranded steel wires |
DE2507583A1 (en) * | 1975-02-19 | 1976-09-02 | Siemens Ag | Optical cable for signal transmission - has several optical transmission elements applied on a strong core of stranded steel wires |
-
1980
- 1980-08-13 FR FR8017842A patent/FR2488698A1/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2288318A1 (en) * | 1974-10-15 | 1976-05-14 | Siemens Ag | COMMUNICATION CABLE WITH OPTICAL TRANSMISSION ELEMENTS |
DE2507583A1 (en) * | 1975-02-19 | 1976-09-02 | Siemens Ag | Optical cable for signal transmission - has several optical transmission elements applied on a strong core of stranded steel wires |
DE2508315A1 (en) * | 1975-02-24 | 1976-09-02 | Siemens Ag | Optical cable for signal transmission - has several optical transmission elements applied on strong core of stranded steel wires |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2520519A1 (en) * | 1982-01-26 | 1983-07-29 | Cables Electro Telecommunicati | Protective cable carrying optical fibre - consists of sleeve with flat diametral reinforcing strip of similar expandability as optical fibre and resistant to stress |
FR2555326A1 (en) * | 1983-11-18 | 1985-05-24 | Foptica | Optical cable especially for connection and process for manufacturing such a cable |
EP0266941A2 (en) * | 1986-11-04 | 1988-05-11 | Nortel Networks Corporation | Optical cable |
EP0266941A3 (en) * | 1986-11-04 | 1990-06-06 | Northern Telecom Limited | Optical cable |
US4820014A (en) * | 1987-02-25 | 1989-04-11 | Sumitomo Electric Industries, Ltd. | Optical cable |
Also Published As
Publication number | Publication date |
---|---|
FR2488698B1 (en) | 1984-04-06 |
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ST | Notification of lapse |