EP1663627A2 - Method for the production of an optical transmission element comprising a filled chamber element and optical transmission element - Google Patents
Method for the production of an optical transmission element comprising a filled chamber element and optical transmission elementInfo
- Publication number
- EP1663627A2 EP1663627A2 EP04786709A EP04786709A EP1663627A2 EP 1663627 A2 EP1663627 A2 EP 1663627A2 EP 04786709 A EP04786709 A EP 04786709A EP 04786709 A EP04786709 A EP 04786709A EP 1663627 A2 EP1663627 A2 EP 1663627A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- optical waveguide
- transmission element
- optical
- filler
- optical transmission
- 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.)
- Withdrawn
Links
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
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4486—Protective covering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00663—Production of light guides
- B29D11/00673—Supports for light guides
-
- 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
- G02B6/4405—Optical cables with longitudinally spaced waveguide clamping
Definitions
- the present invention relates to a method for producing an optical transmission element with at least one optical waveguide and with a filled chamber element surrounding the optical waveguide.
- the invention further relates to such an optical transmission element.
- Optical transmission elements such as optical cables or optical wires, for example in the form of so-called bundle wires, generally contain one or more optical waveguides, which are surrounded by a chamber element enclosing them.
- a common method of fixing the optical waveguide in an optical transmission element is to fill the chamber element with a highly viscous, thixotropic or crosslinking filler.
- the filling compound prevents water, which penetrates into the chamber tube if the transmission element is damaged, from advancing further.
- Such a filling compound has the disadvantage that it can run out or drip out in the case of vertically hanging ends of the transmission element.
- the filling compound escaping during installation can lead to contamination and handling problems on the part of the installation personnel.
- the problem of leakage of the filling compound could be countered with a cross-linking silicone filling compound based on two components.
- This has the disadvantage that the 'manufacturing process with comparatively high costs and a certain production uncertainty due to the used to com- ponents is afflicted.
- the present invention is based on the object ; to specify a method for producing an optical transmission element with which an easily manageable optical transmission element with a filled chamber element can be produced in an effective manner.
- This object is achieved by a method for producing an optical transmission element according to claim 1 and by an optical transmission element according to claim 11.
- the end product being an optical transmission element with an optical waveguide and a chamber element surrounding the optical waveguide, in which several dry and compressible filling elements are arranged in the interior of the comb element, which are formed by material pre-foamed in the interior.
- the filling elements in the pre-expanded state exert a defined contact pressure against the chamber element and against the optical waveguide for fixing the same in the longitudinal direction of the transmission element, changes in position of the optical waveguide being nevertheless possible.
- the filling elements each surround the optical waveguide, and any gaps between the optical waveguide and the chamber element in the cross-sectional plane of the transmission element are filled by the subsequently stabilizing and still slightly expanding filling compound.
- the optical waveguide and the chamber element are essentially positively contacted by the filling elements. There is thus a dry and easy-to-use optical transmission element. Leakage of filling compound and migration of the optical waveguide out of the transmission element is prevented.
- the foamed filling compound preferably has a diameter when it enters the extruder which is approximately equal to an inner diameter of the chamber element.
- the pre-expanded filling compound is still comparatively compact and resilient on the optical waveguide during the extrusion of the chamber element and only expands slightly after it has entered the extruder within the chamber element formed in order to produce a positive connection to the chamber element.
- the foamed filler preferably expands by approximately 10 percent of its volume after entry into the extruder.
- the chamber element can initially largely cure after the extrusion before the filling compound contacts the inner wall of the chamber element.
- polyurethanes or silicones can be used as filler.
- At least two nozzles are advantageously used, which apply the foamed filling compound approximately concentrically and uniformly to the optical waveguide in the radial direction of the transmission element. This largely ensures that the filler elements each match the light wave completely surround the conductor and existing gaps between the optical waveguide and the chamber element in the cross-sectional plane of the transmission element are filled by the filling compound.
- more than two nozzles are preferably used, which are arranged in a star shape in the radial direction of the transmission element and enclose the optical waveguide between them.
- FIG. 1 shows a schematically illustrated production line for producing an optical transmission element according to the invention
- FIG. 2 shows a longitudinal section through an optical transmission element according to the invention in the final state
- Figure 3 shows a further embodiment of a device for producing an optical transmission element according to the inventive method in cross section.
- FIG. 1 shows a schematically illustrated production line with which an optical transmission element, in particular in the form of a bundle core, is produced by the method according to the invention.
- a bundle of optical fibers LW is fed to an extruder EX.
- a plurality of optical waveguides LW run into one Extruder EX for forming a chamber element, here in the form of a wire sheath AH.
- the optical waveguides LW are in particular designed as optical fibers which are arranged in the end product as an optical waveguide bundle or fiber bundle LWB within a loose tube BA with the buffer tube AH.
- optical waveguide LW for example, optical cores, each with a plurality of fibers enclosed, the cores being arranged as a strand within a cable jacket with the sheath AH.
- the invention is further described with reference to the first embodiment.
- an already foamed filler FM is discontinuously applied to the optical fiber bundle LWB by means of nozzles D1, D2.
- the optical fiber bundle LWB is then fed to the extruder EX, which forms the wire sheath AH around the optical waveguide.
- the prefoamed filling compound FM stabilizes itself within the wire sheath AH formed by the supply of heat to the wire sheath and, in the final state, forms a hardened, dry but still compressible filling element FE, which in each case surrounds the optical waveguides.
- Fillers based on foamed polyurethanes or silicones are particularly suitable.
- Two nozzles D1 and D2 are used, which apply the foamed filling compound FM approximately concentrically and uniformly to the optical waveguide LW in the radial direction of the transmission element.
- the nozzles D1, D2 are arranged opposite one another and enclose the optical waveguides LW between them.
- Piezo-controlled valves are preferably used as nozzles in order to implement the regulation of the application quantities and the short cycle times during application (approximately 1 ms per filling element to be formed) at a comparatively high take-off speed.
- the order quantity, opening time and the repetition frequency are adjusted depending on the take-off speed in the take-off direction AZ of the loose tube BA.
- the distance of the filling elements FE and their size can be set individually.
- the length and size of the FE filler elements are regulated via opening time, valve lift and material pressure.
- the LW fiber optic cables are precisely guided to prevent axial vibrations.
- FIG. 2 shows a longitudinal section through a transmission element BA according to the invention in the final state. Due to the intermittent application of the filling compound FM according to FIG. 1 to the optical waveguide LW, several dry and compressible ones are made
- FIG. 3 shows a further embodiment of a device for producing an optical transmission element using the method according to the invention in cross section.
- more than two, in particular four, nozzles D1 to D4 are used, which are arranged in a star shape in the radial direction of the loose tube and enclose the optical waveguides LW between them.
- the diameter of the filling elements can thus be set even more precisely.
- the discontinuously provided and foamed filling material only makes a small weight contribution to the finished transmission element. It is such that "it can easily and completely be stripped off without the use of additional tools of the optical fibers. They will assist you with the installation and assembly of a cable.
- the filling material is such that it voids within the fiber bundle and between the fiber and the chamber wall in cross section line of the loose tube is sealed watertight, but the fibers can easily be pulled through them. The fibers are clean and without residues and can be used immediately for further assembly (splicing, storing in cassettes) without additional cleaning steps.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Mechanical Engineering (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Sealing Material Composition (AREA)
- Optical Integrated Circuits (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10342319A DE10342319A1 (en) | 2003-09-12 | 2003-09-12 | Process for producing an optical transmission element with a filled chamber element and optical transmission element |
PCT/DE2004/001986 WO2005025842A2 (en) | 2003-09-12 | 2004-09-07 | Method for the production of an optical transmission element comprising a filled chamber element and optical transmission element |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1663627A2 true EP1663627A2 (en) | 2006-06-07 |
Family
ID=34305719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04786709A Withdrawn EP1663627A2 (en) | 2003-09-12 | 2004-09-07 | Method for the production of an optical transmission element comprising a filled chamber element and optical transmission element |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070058913A1 (en) |
EP (1) | EP1663627A2 (en) |
CN (1) | CN1878654B (en) |
DE (1) | DE10342319A1 (en) |
WO (1) | WO2005025842A2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10311371B4 (en) * | 2003-03-14 | 2005-08-04 | CCS Technology, Inc., Wilmington | Method for producing an optical transmission element with a plurality of dry and compressible filling elements |
DE102005048730B4 (en) * | 2005-10-12 | 2009-10-15 | CCS Technology, Inc., Wilmington | Method for producing an optical transmission element and optical transmission element |
US8929701B2 (en) | 2012-02-15 | 2015-01-06 | Draka Comteq, B.V. | Loose-tube optical-fiber cable |
CN106057156A (en) * | 2016-07-29 | 2016-10-26 | 北京小米移动软件有限公司 | Liquid crystal display control method and liquid crystal display control device |
CN108318248B (en) * | 2017-01-16 | 2021-09-28 | 舍弗勒技术股份两合公司 | Optical fiber vibration sensing-based bearing state online monitoring system |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2445532C2 (en) * | 1974-09-20 | 1976-09-09 | Aeg Telefunken Kabelwerke | Corrugated sheathed fiber light guide |
DE2743260C2 (en) * | 1977-09-26 | 1990-05-31 | kabelmetal electro GmbH, 3000 Hannover | Optical fiber communications cable and process for its manufacture |
DE3306551A1 (en) * | 1983-02-22 | 1984-08-23 | Siemens AG, 1000 Berlin und 8000 München | DEVICE FOR PRODUCING A LIGHTWAVE GUIDE ELEMENT |
DE3931666A1 (en) * | 1989-09-22 | 1991-04-04 | Kabelmetal Electro Gmbh | MESSAGE CABLES |
US5148509A (en) * | 1991-03-25 | 1992-09-15 | Corning Incorporated | Composite buffer optical fiber cables |
DE19500467A1 (en) * | 1995-01-05 | 1996-07-11 | Siemens Ag | Optical cable and method for recycling it |
DE19516970A1 (en) * | 1995-05-09 | 1996-11-14 | Siemens Ag | Electric and optical cable filler with max. swelling power if water enters |
DE19713063A1 (en) * | 1997-03-27 | 1998-10-01 | Siemens Ag | Communications cable device for e.g. optical fibre ribbon |
US6584251B1 (en) * | 2000-05-23 | 2003-06-24 | Alcatel | Solid stranding flextube unit |
-
2003
- 2003-09-12 DE DE10342319A patent/DE10342319A1/en not_active Ceased
-
2004
- 2004-09-07 CN CN2004800333184A patent/CN1878654B/en not_active Expired - Fee Related
- 2004-09-07 US US10/571,987 patent/US20070058913A1/en not_active Abandoned
- 2004-09-07 WO PCT/DE2004/001986 patent/WO2005025842A2/en active Application Filing
- 2004-09-07 EP EP04786709A patent/EP1663627A2/en not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2005025842A3 * |
Also Published As
Publication number | Publication date |
---|---|
WO2005025842A3 (en) | 2005-06-16 |
DE10342319A1 (en) | 2005-04-21 |
US20070058913A1 (en) | 2007-03-15 |
WO2005025842A2 (en) | 2005-03-24 |
CN1878654B (en) | 2011-09-14 |
CN1878654A (en) | 2006-12-13 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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17P | Request for examination filed |
Effective date: 20060309 |
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DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20070402 |
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R17C | First examination report despatched (corrected) |
Effective date: 20070914 |
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GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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RTI1 | Title (correction) |
Free format text: METHOD FOR THE PRODUCTION OF AN OPTICAL TRANSMISSION ELEMENT COMPRISING A FILLED CHAMBER ELEMENT |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20091029 |