EP0941494A1 - Schutzvorrichtung - Google Patents
SchutzvorrichtungInfo
- Publication number
- EP0941494A1 EP0941494A1 EP97951201A EP97951201A EP0941494A1 EP 0941494 A1 EP0941494 A1 EP 0941494A1 EP 97951201 A EP97951201 A EP 97951201A EP 97951201 A EP97951201 A EP 97951201A EP 0941494 A1 EP0941494 A1 EP 0941494A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plates
- platelets
- shrink tube
- reinforcements
- fibers
- 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.)
- Ceased
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
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
-
- 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
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2558—Reinforcement of splice joint
Definitions
- the invention relates to a method for producing a protective device for the splices of optical fibers and a protective device itself.
- EP-A1-0 1 64 784 a method for connecting optical fiber tapes is known, in which the area of the spliced fiber tapes is protected by two glass plates, which preferably have the same thermal expansion coefficient as the optical waveguides to be protected. Short end sections of the plastic sheathing of the fibers are first removed, then the opposite fiber ends are fused to one another, and finally the glass plates with the intermediate splice points are connected to one another by means of a hot-melt adhesive film or a varnish curable with UV light.
- the lacquer layer applied to the one glass plate can be provided with grooves into which the individual splice points of the optical fibers are embedded.
- a shrink tube contains an oval tube made of a hot-melt adhesive (e.g. EVA, ethylene-veneyl acetate) with a semicircular rod, for example a ceramic rod, as an insert, which serves as a support for the spliced optical fibers.
- a fiber ribbon is pushed through the hot-melt adhesive tube.
- the shrink tube with the tube and rod is brought into position over the splice points and shrunk onto them, the hot-melt adhesive softening and enclosing the stripped fibers to be protected.
- the protective device is asymmetrical, stiff and heavy compared to the fiber ribbons, has a relatively large diameter and is a foreign body that is not compatible with the glass fibers.
- quartz glass fibers have a very high mechanical strength immediately after their production.
- the fibers can be subjected to relatively high tensile and bending forces without the fibers breaking.
- this strength decreases very quickly over time if the fibers are exposed to environmental influences, for example the normal atmosphere, the dust particles, air humidity or finger sweat.
- the strength of the fibers can be determined in a known manner by applying a thin plastic coating, e.g. a layer of silicone, UV-curing adhesives, such as acrylates or epoxy resins, or with a metallization so that the fibers do not become brittle.
- EP-B1-0257841 discloses a method according to the preamble of claim 1, in which the platelets are made from break-sensitive materials with a small coefficient of thermal expansion and the surface of the platelets is passivated to increase strength.
- the platelets consist of a crystalline lithium-aluminum-silicate compound and are made to measure by mechanical processing (grinding, polishing). The processing creates fine cracks on the platelet surfaces, which are eliminated by surface treatment using ion exchange.
- the ion exchange takes place in a bath with molten sodium or potassium salts at a temperature between 350 ° C and 550 ° C for a time of 15 minutes to 24 hours.
- the object of the invention is therefore to provide a method of the type mentioned in the preamble of claim 1, after all it is possible to create a reliable and inexpensive protective device for the stripped at the junctions and very sensitive to environmental influences, this protective device if possible slim and thin and should be compatible with the dimensions of the fiber ribbon.
- quartz glass plates are drawn. Quartz glass is particularly suitable because of its high breaking strength and also because it has the same coefficient of thermal expansion as the glass used for the optical fibers.
- a Protective layer coating made with a plastic, preferably with a polyimide.
- This protective layer can be applied in a simple manner directly during the production of the platelets.
- the thickness of the protective layer is advantageously in the range of 25 ⁇ m.
- the platelets are provided on their long sides with continuous reinforcements.
- the plates provide greater resistance to their deflection.
- From DE-C2-331 301 4 it is known to provide the two cover plates at the edges with angled tabs which engage in a tooth-like manner. So that the cover plates should not move against each other. However, a certain amount of kink protection is also achieved.
- the continuous longitudinal reinforcements according to the invention are more effective for kink protection.
- the reinforcements are advantageously formed by angled side ends or by tubes or rod-like thickenings.
- platelets with two different widths are produced and the reinforcements are formed by bent longitudinal side ends and tubes arranged thereon, the two widths being chosen so that two platelets of different widths can form a locking connection with one another.
- a protective device with two interlocked plates is possible.
- the invention also relates to a protective device of the type mentioned in the preamble of claim 9, which is characterized in that platelets produced by the method according to one of claims 1 to 8 are used.
- FIG. 1 shows a perspective exploded view of two interconnected optical fiber tapes and a first embodiment of the protective device according to the invention
- FIG. 2 is a plan view of the assembled protective device and the optical fiber ribbon according to FIG. 1,
- FIG. 3 shows a perspective illustration of two interconnected optical waveguide tapes and a second embodiment of the protective device according to the invention
- FIG. 4 shows a cross section through the arrangement of FIG. 3,
- FIG. 5 shows a cross section through the assembled arrangement of FIG. 3 covered with a shrink tube
- 6 shows a cross section similar to FIG. 5 with a shrunk-on part
- Fig. 1 the connection of two glass fiber tapes 1, 2 is shown, the plastic sheath of which was removed for splicing, so that the optical fibers are exposed.
- a spliced fiber ribbon Arranged on both flat sides of the spliced fiber ribbon are two elongated, thin plates 3, 3 ', which preferably consist of quartz glass and whose thickness is in the range from 15 to 300 ⁇ m. These plates are produced by pulling them out of a melted quartz glass rod, similar to the production of a glass fiber. Quartz glass is used because it is particularly unbreakable and has the same coefficient of thermal expansion as the quartz glass fibers used in telecommunications.
- the protective layer 4 can also be applied by a drawing process and can consist of a suitable metallization or passivation layer, in particular of a plastic layer.
- a plastic layer for example, it can consist of a polyimide.
- the plastic protective layer 4 has a thickness that is in the range of 25 microns. The surface of the platelets is thus protected against environmental influences, so that the initial strength, ie the strength of the platelets immediately after the drawing process, is retained. These plates are therefore kept very thin and flexible.
- the plates 3, 3 ' can be cut to the desired size, for example by scratching and breaking or by cutting with a laser beam.
- thin platelets made of other brittle materials can be provided with protective layers, in particular again made of materials whose thermal expansion coefficient corresponds to that of the glass fiber.
- the platelets 3, 3 ' can be encased by a shrink tube 6.
- This shrink tube can be provided with a hot-melt adhesive on the inside and is pushed over one of these glass fiber tapes before the connection of the two glass fiber tapes 1, 2. It is preferably longer than the platelets 3, 3 'and then also forms a kink protection 7 after its shrink-fitting, as shown in FIG. 2.
- Thin plates 3, 3 ' have greater resistance to bending if their long sides are reinforced.
- the platelets 3, 3 'according to FIGS. 3 and 4 can be provided with angled long ends 8.
- Such plates, which are glued to one another, including the glass fiber tapes, can again be covered with a shrink tube according to FIG. 5, which is shrunk on according to FIG. 6.
- the platelets 3, 3 ' can also be provided on their long sides with tubes 9, which are also covered with the protective layer 4.
- rod-like thickenings can also be used.
- the quartz glass rod from which the plates 3, 3 'are drawn must then have a corresponding profile.
- Such a rounding of the side edge region of these platelets also has the advantage that the protective layer 4 does not withdraw during application.
- the tubes 9 can also be arranged on bent longitudinal side ends 10 of the plates 3, 3 '.
- the widths of the platelets 3, 3 ' are selected differently, in such a way that these platelets can snap into each other.
- the design with the snap-in of the plates should save a shrink tube, so that faster work is possible.
- the plates with the hot melt adhesive can be preheated in a device. The spliced fiber tapes are inserted and the plates are snapped into each other so that the protected fibers can be removed immediately.
- the protruding length of the shrink tube remains funnel-shaped (not shown) so that the glass fibers can be inserted between the plates more easily.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19649007 | 1996-11-27 | ||
DE1996149007 DE19649007A1 (de) | 1996-11-27 | 1996-11-27 | Schutzvorrichtung |
PCT/EP1997/006362 WO1998023985A1 (de) | 1996-11-27 | 1997-11-14 | Schutzvorrichtung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0941494A1 true EP0941494A1 (de) | 1999-09-15 |
Family
ID=7812848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97951201A Ceased EP0941494A1 (de) | 1996-11-27 | 1997-11-14 | Schutzvorrichtung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0941494A1 (de) |
DE (1) | DE19649007A1 (de) |
WO (1) | WO1998023985A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10110740A1 (de) * | 2001-03-02 | 2002-09-12 | Rolf Rosberg | Streifen |
EP3853648A4 (de) * | 2018-09-20 | 2022-05-11 | CommScope Technologies LLC | Laminatspleissschutzvorrichtung |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4046454A (en) * | 1976-05-18 | 1977-09-06 | Bell Telephone Laboratories, Incorporated | Optical fiber connector |
DE3313014C2 (de) * | 1983-04-12 | 1985-02-07 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Abdeckung für einen Lichtwellenleiterspleiß |
DE3345222A1 (de) * | 1983-04-12 | 1985-06-27 | ANT Nachrichtentechnik GmbH, 7150 Backnang | Abdeckung fuer einen lichtwellenleiterspleiss |
EP0164784A1 (de) * | 1984-05-23 | 1985-12-18 | Koninklijke Philips Electronics N.V. | Verfahren zur Verbindung von optischen Fasern |
JPS6340107A (ja) * | 1986-08-05 | 1988-02-20 | Ngk Insulators Ltd | 光フアイバ接続用補強部材 |
DE4222937A1 (de) * | 1992-07-11 | 1994-01-13 | Oberspree Habelwerk Gmbh | Schutz für eine Lichtwellenleiter-Schweißstelle |
-
1996
- 1996-11-27 DE DE1996149007 patent/DE19649007A1/de not_active Withdrawn
-
1997
- 1997-11-14 EP EP97951201A patent/EP0941494A1/de not_active Ceased
- 1997-11-14 WO PCT/EP1997/006362 patent/WO1998023985A1/de not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9823985A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE19649007A1 (de) | 1998-05-28 |
WO1998023985A1 (de) | 1998-06-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
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 |
|
17P | Request for examination filed |
Effective date: 19990628 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE |
|
17Q | First examination report despatched |
Effective date: 19990921 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ROSSBERG, ROLF |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: ROSSBERG, ROLF |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
18R | Application refused |
Effective date: 20010811 |