Fiber optic module
(57) Abstract:Usage: fiber-optic communication lines. The inventive module contains fiber light guide with a protective polymeric coating that is placed with a fixed gap in a metal tubular sheath made of a ribbon having longitudinally placed on the seam. The edge of the shell is made with smooth curves. Tape thickness is comparable with the radius of the fibre, plot touch the edges of the ribbon is less than the thickness of the strip at a fixed gap between the optical fiber and a protective shell filled with a hydrophobic material. Over protective shell made additional metallic coating, including above the line touch the edges of the ribbon, the thickness of the coating is less than the thickness of the main metal shell. Top with additional metallic coating applied to the polymer coating thickness of 0.1-0.3 mm 2 C.p. f-crystals, 2 Il. table 2. The invention relates to electrical engineering, in particular to the field of optical fibers and optical cables, and can be used in the manufacture of communication cables.Known optical fiber  contains the fiber, having a core of transparent to opaline core, as well as a protective shell, which is made of a thin lacquer coating. This thin coating mainly provides the sealing surface of the fiber, which eliminates degradation of the fiber, the deterioration of its mechanical characteristics.Also known fiber optic or modules  in which the optical fiber applied to the primary buffer coating from soft silicone varnish and secondary thick shell of hard polymer type polyamide. Both the shell marked tightly with no gap. Such fiber or the module has a high mechanical strength, but, as a rule, the worst transfer characteristics, because the imposition of a thick polymer shell is hard to avoid microengine deformations. The last cause additional losses in the fiber.On the other hand, the known optical modules  the above structures, containing fiber, placed in a thick plastic tube freely, i.e. without compression and with a stock length (i.e., fiber length somewhat greater than the length of the polymer tube). In this case, the polymer tube performs a basic function, which consists in protecting the fiber from the outer transverse and longitudinal to the key and so the preservation of transmission parameters at the level made directly in the production of fiber. When used in this module fiber, according to the counterpart shown in  are able to produce modules with extremely low losses, which are used in fiber-optic communication lines and information transfer. The disadvantage of such a module, but rather the technology should include the fact that the necessary supply of fiber or its rectilinear position is difficult to sustain because of shrinkage phenomena polymer tube after its exit from the head of the press. On the other hand, the presence of a hydrophobic material inside the tube creates two intractable problems: high frost resistance and the need for its compatibility with the polymer material of the coating. The absence of these properties is not possible to create a reliable cold-resistant optical communication cables.Significant disadvantages of the known optical modules  are their large size and high intensity.For modules  a common disadvantage is the occurrence of the additional losses when exposed to high and low temperatures. This is due to the fact that due to the large coefficient of linear elongation of polymeric materials when Waimanalo extensions are much less.The closest in technical essence to the proposed technical solution should be considered as a fiber optic module  used for manufacturing a multi-fiber optic communication cables. This fiber optic module contains fiber light guide with a relatively thick protective polymer coating, is placed in a tubular sheath made of a metal strip having longitudinally placed on the seam, the edges of the shell nonlinear deformed, and the seam after manufacturing span or welded, the ratio of the outer diameter of the optical fiber to the inner diameter of the tubular metal shell more than 6/10.This module has the advantage that the fiber having a relatively thick polymer coating, additionally protected against external mechanical influences and impacts of moisture.This disadvantage inherent in the prototype  which is also a large mass of thick polymer shell (because on the inside there is a module similar ). To the disadvantage of the prototype should also be attributed to the relatively large dimensions for modern quartz fiber with diameter optical sheath 125 μm, the diameter of the secondary is the Technical result of the invention is to improve reliability and reduce material consumption by reducing the geometric dimensions of the module. This saves the high technological quality of the module under which it is necessary to understand the ability of the module to store parameters of the transmission fiber during subsequent process steps involved in the manufacture of the cable and the resistance of the fibers in the finished optical cable to mechanical loads
bending, torsion, transverse and longitudinal pressures and climatic influences. The last factor requires module minimal shrinkage or stretching, to prevent bending or microengine fiber during raising or lowering of the ambient temperature.The technical result of the invention is the reduction of the dimensions, material consumption without lowering the strength and reliability of the optical module, as well as increased resistance to high or low temperature environment in terms of conservation of the transmission parameters at the level of the original fiber.The achievement of the technical result according to p. 1 claims, is that the edges of the protective shell is made with smooth undeformed curves, thickness approximately equal to the radius of the optical fiber, the plot touch the edges of the ribbon is less than the thickness of the ω ratio of the outer diameter of the fiber to the inside diameter of the protective sheath less than 0.6.In the proposed technical solution of the protective sheath made of thin, rolled-up tube of a metal tape, and the tape edge with smooth and rounded, pressed together and sealed design. Increased flexibility of design, achieved in the manufacturing process of the module during negitave sheath material provides a tight seal edges together with a hydrophobic filling the space between the fiber and the protective sheath increases the tightness. The gap between the outer diameter of the fiber and the inner surface of the tube has a fixed throughout the length of such a size that ensures the necessary freedom of the fibers when the temperature of the environment so that bending of the fibers arising from the compression of the metal shell, the increment of the attenuation does not exceed the specified value.In Fig. 1 shows an optical module made in accordance with the selected prototype.The module contains the optical fiber 1, consisting of the optical fiber 2 (quartz or any other), lacquer coating 3, a tubular metal shell 4, the edges 5 which are adjacent to each other across the surface.The module implementation is a metallic tape, rounded edges 5 which are undeformed approaching a semicircle of curvature. The edges of the shell adjacent to each other. Inside the module is a hydrophobic material.A practical embodiment of such a cable with the fiber having a gradient profile of the refractive index and the characteristic geometrical dimensions of 125 and 50 microns and an external diameter of 250 μm and the thickness of copper tape 70 μm, had a diameter of 430-450 μm. A gap of about 50 μm. Increment attenuation in this module was not observed in the temperature ranges from +80 to -60o.Thus, the proposed technical solution optical module according to Fig. 2 differs from the module of the prototype Fig. 1, because he has a small geometrical dimensions and ensures the integrity of the fibers in the transverse and longitudinal direction. Geometrical dimensions of the module, if necessary, may be made by others in a fairly wide range from 0.4 to 1.2-1.5 mm.Version of the proposed technical solutions fiber optic module p. 2 has an additional metal coating, the thickness of which is substantially less than the primary metal protective coating. It can be made of tin, Nickel tightness.Version of the proposed technical solutions fiber optic module according to p. 3 has an additional polymer coating of polyethylene, PVC skin or any other polymer material with a thickness of 0.10-0,3 mm This coverage provides additional sealing and improves the processing properties of the module, ensuring its adaptability with the twisted multi-fiber cables.On the basis of the proposed technical solutions of the optical module can be made multi-fiber optical cables.For example, a possible embodiment of one - and multi-fiber optical cable, which would contain the modules PP 1 or 2 placed inside the polymer tube made of polyethylene or any other material used in the cable industry for protective shells. The cable contains a filling between the outer membrane module and the inner part of the protective cable sheath of the filaments technical glass or high-strength synthetic fibres (SVM). This filling improves the manufacturability of the cable, because these threads increase the slippage of the modules, whereby they are freely suspended inside with some clearance. In these curved. Protection against tensile loads is provided a high-strength threads RAS.Another option cable involves the twisting of modules made under item 3, around a Central strength element and protection combined external shells.Option next possible solution involves the stacking of modules on p. 1-2 inside the grooves of the Central load-bearing element, is made by extruding on a steel or stekloplastick rod polymer profile shape in cross section.Increased strength and less sensitive modules, executed, according to the invention, at PP. 1-3, to mechanical stress can increase the reliability of manufacturing a multi-fiber optical cables while maintaining the transmission parameters at the level of the original fiber.Such cables have undoubted advantages that arise from the results of comparative tests of basic optical module under item 1 of this decision, and standard fibers from which it is made. These results are shown in table 1.The results show that the miniature module, made under item 1 of this technical solution with the minimum size of the deposits allow you to create the optical communication cables miniature design, protected from the effects of the major destabilizing factors in the environment of moisture, temperature and mechanical longitudinal, transverse bending loads, including sealed cables used when exposed to high lateral loads, such as submarine cables. 1. Fiber optic module containing the fiber light guide with a protective polymeric coating that is placed with a fixed gap in a metal tubular sheath made of a ribbon having longitudinally placed on the seam, characterized in that the edge of the shell is made with smooth curves, the thickness of the tape is comparable with the radius of the fibre, plot touch the edges of the ribbon is less than the thickness of the strip at a fixed gap between the optical fiber and a protective shell filled with a hydrophobic material.2. Module p. 1, characterized in that on top of the protective sheath is made of an additional metallic coating, including above the line touch the edges of the ribbon, the thickness of the coating is less than the thickness of the main metal shell.3. Module p. 2, characterized in that the above additional metal coatings are deposited polymer is
FIELD: optical and electronic industry; production of fiber optic components having electrooptical effect.
SUBSTANCE: the inventions are dealt with optical and electronic industry, and may be used for development engineering of transmitting systems and data processing, in which application of the fiber optic components with electrooptical effect is expedient. The fiber consists of a core, a light conducting shell, a light-absorbing shell containing light-absorbing elements and current-carrying electrodes. The method includes operations of a down-draw of separate glass rods from glasses fillets composing elements of a fiber, piling up a pack of a with the form of cross-section of a hexahedron or a square including piling of electrodes, afterstretching of preform and its pulling into a fiber with application of a polymeric coating. The invention allows to create a single-mode fiber with heightened electrooptical effect from the glasses having a Kerr constant by 1.5 order higher than one of a quartz glass, to produce fibers with the given structure of shells, cores and control electrodes at simplification of process of a drawing down of fibers.
EFFECT: the invention ensures creation of a single-mode fiber with heightened electrooptical effect, to produce fibers with the given structure of shells, cores and control electrodes, to simplify process of fibers drawing down.
13 cl, 9 dwg
SUBSTANCE: fiber has core and cover. Fiber is made in such a way, that in case of change of radiuses of beds with different refraction coefficients, at least one optical property of core, for example, effective section of core Aeff and slant of dispersion curve, reach appropriate limit values in given range of deflections from base radius. Length of cut wave equals 1450 nm or less. Optical fibers have practically constant optical properties and allow to vary chromatic dispersion in certain limits.
EFFECT: higher efficiency.
2 cl, 14 dwg
FIELD: optical cable and optical fiber manufacture.
SUBSTANCE: branded optical fiber has optical-fiber core, marking layers, and dyed layer. Set of marking layers composed of small definite-size droplets of marking dye are disposed at intervals along optical fiber core, on its surface. Dyed layer is applied to marking layers and to optical-fiber core on areas covered with marking layers. Specified thickness of dyed layer is not less than or equal to 2 μm and not more than or equal to 10 μm. Specified thickness of marking layers is not less than or equal to 0.5 μm and not more than or equal to 2.5 μm. Specified length of marking layers is not less than or equal to 1 mm and not more than or equal to 15 mm. Interval between marking layers should be specified between 1 and 200 mm. Specified volumetric efficiency of marking layers should be mot over or equal to 20%. Specified diameter of small droplets should be not less than or equal to 10 μm. and not less than or equal to 10 μm. Optical cable has plurality of branded fibers disposed in forming tube covered with plastic jacket.
EFFECT: enhanced identifying ability and reduced laying loss.
18 cl, 11 dwg
FIELD: cable termination.
SUBSTANCE: device 1 for cable termination 20, which cables have elastic power member 21, has one retaining member 3 for placing end of cable 20 and support member 2 for placing one retaining member. Support member 2 is provided with clamping aids 11, 12 to prevent any longitudinal movement of retaining member 3. Aids 11, 12 have resilient claw 11 departing from support plate of support member 2. The other similar claw or wall departs fro support plate of support member. The clamping aids create clamping pressure to retaining member at longitudinal direction, which member 3 is disposed onto support member, to press power member 21 between clamping aids and one surface of retaining member.
EFFECT: easy and simple cable termination.
12 cl, 4 dwg
SUBSTANCE: flexible fiber-optic cable, which has many optical fibers connected together in form of bundle with flexible central part inside which part optical fibers move relatively adjacent fibers in fiber-optic bundle. The cable also has two rigid end parts. Any of two rigid end parts has thickness-uniform protection layer, disposed along their external surface starting from point disposed at distance from free end of end part and is directed inside. Tip is disposed around protection layer and is put with tension on protection layer in such a manner that end part is centered in tip. Binder is disposed between tip and rigid part from point, disposed at distance from free end of any of end parts to inside, till free end of end part for connection with rigid end part.
EFFECT: centering of end parts of fiber-optic bundle in tips; lesser damage of fibers of end of parts of cable.
18 cl, 6 dwg
FIELD: engineering of devices meant for efficient detection of position of cords, wires or cables used in electric engineering.
SUBSTANCE: device includes, either in or on each cord, wire, cable or pipeline, an optical filament, placed from one socket to other socket of cord, wire, cable or pipeline. First end of optical filament is accessible on appropriate socket of wire with possible lighting of it by injecting light into filament. Second end of optical filament is accessible on different end of same cord and is made with possible receipt of light, injected into filament on first end. Bent ends of optical filament are sunk into sockets.
EFFECT: trustworthy identification of ends of cords, wires, cables, pipelines, independently from their number and locations, without interrupting communication or stopping operation.
6 cl, 5 dwg
FIELD: optical cables.
SUBSTANCE: optical cable contains element for transferring optical signals, and structure capable of protecting aforementioned element. Aforementioned structure is a multi-layered structure and is positioned in position, radially external relatively to aforementioned one element, and contains: a) one first protective layer of polymer material in position, radially external relatively to aforementioned element; b) one protective layer of foamed polymer material in position, radially external relatively to aforementioned first protective layer, and c) one second protective layer of polymer material in position, radially external relatively to aforementioned protective layer of foamed polymer material. Foamed polymer material has density ranging from 0,3 to 0,7 kg/dm3 and stretching resilience module ranging from 300 to 700 MPa at 20°C.
EFFECT: increased resistance of cable to impact and compression, increased flexibility of cable.
4 cl, 5 dwg
FIELD: the invention refers to sealing of an optical fiber.
SUBSTANCE: the mode envisages getting a container having an aperture, provision of two compacted stripes, placement of a part of the optical fiber between the two compacted stripes, application of heat and/or pressure to the stripes so as to receive a hermetic element, placement of the hermetic element in the aperture, application to the container of heat and/or pressure. The hermetic element hermetically surrounds the fiber.
EFFECT: creation of a simple and economical mode which may be used for different types of coverings, hard and flexible.
9 cl, 8 dwg
FIELD: tubular cable conduits for placement of subterranean cables.
SUBSTANCE: cable conduit device contains flexible structure of internal cable tunnel and is built in such a way, that a cable is contained inside the cable conduit. Flexible structure is composed of a separate sheet of flexible material in form of stripes, which are connected along their longitudinal edges to define the channel, through which cable may pass in longitudinal direction, through structure of internal cable tunnel between layers. Adjacent layers have varying width between longitudinal edges, as a result of which the wider layer projects to the side from the narrower layer to create open configuration relatively to the channel. Flexible insert for insertion into cable conduit contains flexible material, having base threads, formed of polyester and filling threads made of nylon. Flexible structure in one of variants contains textile material.
EFFECT: creation of dividing device which ensures improved usage of space inside the cable conduit.
7 cl, 8 dwg
FIELD: electrical engineering.
SUBSTANCE: extended hose comprises flexible layered hose. The width of the layers is the same, and the layers are spaced one from the other. The spaces receive extending members.
EFFECT: expanded functional capabilities.
70 cl, 10 dwg
FIELD: optical modules with anti-corrosion cover.
SUBSTANCE: method for manufacturing an optical module with anti-corrosion aluminum cover, which is sprayed onto the surface of free buffer tube made of stainless steel includes following stages: spraying of fine aluminum powder onto the surface of free buffer tube made of stainless steel by melting the aluminum template with electric arc heating and spraying of melted aluminum with compressed air. Also, heating of aluminum cover layer up to temperature between 100 and 700°C, rolling of heated layer of aluminum cover to reduce porosity and deviations in thickness of aluminum cover layer and fast cooling of rolled layer of aluminum cover to prevent worsening of working properties of elements inside the optical module. Before the spraying stage, included additionally is the stage of preliminary heating of free buffer tube made of stainless steel up to temperature between 50 and 100°C. before the preliminary heating stage, included additionally is the stage of jet machining of the surface of the free buffer tube of stainless steel to create convex and concave sections. Optical cable, inbuilt in lightning protection cable, includes one or more optical modules, manufactured in accordance to the method.
EFFECT: increased productivity, reduced cost of products, reduced porosity and thickness deviations of resulting aluminum cover layer, which prevents corrosion of aluminum cover layer.
2 cl, 4 dwg
FIELD: fiver-optic engineering.
SUBSTANCE: method can be during mounting of building lengths of optical cables in couplings to provided output of conductors from earth electrodes. Washers are moved apart according to template for distance being equal to distance between grooves of coupling's port. Space between washers is filled with sealing compound. Conductor with washers is mounted in port of lower part of coupling's case in such a way that washers come into grooves of coupling's port. Lower and top ports of coupling's case are connected together. Washers with openings, number of which openings equals to number of earth electrodes to be introduced, are put one atop other in such a manner that openings are brought in coincidence. Earth electrode is inserted into any opening in such a way that single earth electrode goes through any opening to pass through both washers. After that washers are moved apart to follow template for distance being equal to distance between grooves of coupling's port. Space between washers is filled with sealing compound. Earth conductor with washers is inserted into port of lower part of coupling's case in such a way that washers enter grooves of coupling's port and top and lower parts of case are connected together to provide sealing of coupling's port of optical cable where earth conductors are outputted from armor to earth conductors.
EFFECT: widened area o application.