3277results about "Fibre mechanical structures" patented technology

The invention relates to an anti-ant large-core-number fiber ribbon cable comprising a cable core and an outer sheath. The cable core includes loose tubes; and fiber ribbons are sleeved inside the loose tubes. The outer sheath is an outer nylon sheath; and a non-metallic reinforcement layer is arranged between the outer sheath and the cable core. According to the anti-ant large-core-number fiber ribbon cable provided by the invention, with the outer nylon sheath, ants can not bite the sheath, so that the damages on the optical cable by ant biting in a pipe at an area with a serious anti problem are prevented, the normal state of the cable is ensured, and the application region of the cable is extended. The cable based on a simple and reasonable structure has advantages of small cable diameter, high fiber density, large fiber capacity, and low duty ratio and can be laid in a pipe conveniently; and the bending performance is good. During branched connection, 4 to 24 fibers can be melted once, so that the construction time is saved and the manpower cost is lowered, and the construction efficiency is improved. On the basis of the full drying type dielectric structure, branched connection is realized conveniently and usage becomes convenient.

The invention discloses a windable optical cable belt and a manufacturing method thereof, and the manufacturing method comprises the steps: distributing a plurality of parallel optical fibers in the same plane, so as to form an optical cable belt; a dispensing valve is adopted to carry out dispensing and bonding on the two adjacent optical fibers, intermittent dispensing is carried out in the first direction at a first preset interval so as to form bonding parts, and the two adjacent bonding parts of the optical cable belt in the second direction are distributed at a second preset interval in the first direction; and curing the bonding part of the optical cable tape, so that the upper surface of the cured bonding part is sunken downwards, and the lower surface of the cured bonding part is sunken upwards. According to the optical fiber manufacturing method, the adjacent optical fibers are bonded in a manner of carrying out interval dispensing at the first preset interval in the first direction, and the adjacent bonding parts in the second direction have the second preset interval in the first direction, so that compared with an existing optical fiber dipping method, the method has the advantages that the crimpability of an optical cable belt can be effectively improved; and the glue consumption can be reduced.

The invention relates to a polyethylene and silica gel mixed material, a preparation method thereof and application of the polyethylene and silica gel mixed material in a composite optical cable silicon core tube. The composite material comprises the following components in parts by weight: high-density polyethylene, an ethylene-siloxane copolymer elastomer, a maleic anhydride grafted polyolefin elastomer, hydroxylated nano silicon dioxide, liquid paraffin, a crystallization nucleating agent, an ultraviolet light absorber, an auxiliary stabilizer, a processing aid and color master batch. The liquid paraffin is formed by blending dual-molecular-weight paraffin with different carbon chain lengths, and part of the liquid paraffin is grafted and modified by polybutylene so as to enhance the anchoring capacity of the lubricating phase; in addition, nano cellulose crystals grafted by a PEG-PCL (Polyethylene Glycol-Polycaprolactone) block copolymer are introduced, so that the dimensional stability and the interface structure integrity of the material are synergistically enhanced. The composite material has excellent low friction, thermal oxidation stability, creep resistance and ultraviolet aging resistance, and is suitable for preparation of a high-performance composite optical cable silicon core tube.

A telecommunications tray (50 / 300 / 400 / 600 / 900 / 1100 / 1200 / 1400 / 1800) is configured for mounting to a telecommunications fixture. The tray (50) includes a removably mounted telecommunications module (100 / 200 / 302 / 402 / 700 / 800 / 1000 / 1100 / 1300 / 1900 / 2000) that defines a body that is enclosed by a cover (1102 / 1320 / 1924) to define an interior. The module (100 / 200 / 302 / 402 / 700 / 800 / 1000 / 1100 / 1300 / 1900 / 2000) includes radius limiters (902 / 1356 / 1358 / 1954) within the interior for managing cables and defines connection locations for inputting and / or outputting signals via cables for processing within the module (100 / 200 / 302 / 402 / 700 / 800 / 1000 / 1100 / 1300 / 1900 / 2000), the telecommunications module (100 / 200 / 302 / 402 / 700 / 800 / 1000 / 1100 / 1300 / 1900 / 2000) movably mounted to the tray (50 / 300 / 400 / 600 / 900 / 1100 / 1200 / 1400 / 1800).

A splice equipment assembly includes two routing paths along opposite sides of a splice region. The two routing paths do not cross. The two routing paths do not extend circumferentially around the splice region. The two routing paths provide adequate slack to allow a splice tray to be removed from the splice region and moved to a workstation outside of the splice equipment assembly. Multiple splice equipment assemblies can be mounted to the same rack (e.g., at a front and rear of the rack).

The invention relates to the technical field of optical cable preparation, and discloses a high-corrosion-resistance rodent-damage-prevention self-supporting optical cable of a non-metal optical unit, which comprises the following steps of: performing surface activation on the non-metal optical unit to establish a controllable interface premise, and under the strict constraint of the premise, performing surface activation on the non-metal optical unit to obtain a rodent-damage-prevention non-metal optical unit; and setting process parameter windows of subsequent functional interface coating coating and curing, high-modulus rodent-damage-preventing material laying and sheath co-extrusion, and setting a process parameter window of subsequent functional interface coating coating and curing, high-modulus rodent-damage-preventing material laying and sheath co-extrusion. According to the invention, the high-modulus rodent-damage-preventing material laying is carried out in a sheath high-temperature extrusion process, and the high-modulus rodent-damage-preventing material is used as a heat-stable internal skeleton to normalize the flowing process of a molten sheath material; and the sheath material is promoted to form a physically deep coupled composite protection system around the skeleton when being cooled and cured, so that the corrosion resistance and the physical damage resistance are mutually enhanced in the manufacturing link, and the internal protection uniformity and the long-term service reliability of the optical cable are improved.

The invention belongs to the related field of optical communication transmission technology, and discloses a telescopic butterfly-shaped optical cable, which comprises a main body sheath, an optical fiber, a flat steel wire and a V-shaped tearing opening, and is characterized in that the whole cross section of the butterfly-shaped optical cable is of a square structure with a certain length-width ratio; the optical fiber is arranged in the main body sheath and is wrapped by a single sleeve or double sleeves; the V-shaped tearing openings are kept symmetrically arranged on the long sides of the square structure, the flat steel wires are kept symmetrically arranged on the corners or the side portions of the square structure, and the flat steel wires are correspondingly used for storing redundant parts of optical fibers in a coil mode while having the function of a reinforcing piece. According to the butterfly-shaped optical cable, on the basis that an existing suspension wire steel wire structure is completely cancelled, the weak problem of the tearing opening part is effectively avoided, it is ensured that the butterfly-shaped optical cable has the needed mechanical strength, and the optical fiber containing space of the butterfly-shaped optical cable is improved; and meanwhile, reliable storage of internal standby optical fibers can be realized, and other functions such as rapid switching can be supported.

A cable guide includes a base for positioning the cable guide on a base surface of an internal area of a telecommunications chassis. The base is generally planar. The cable guide includes a plurality of arms and at least one arm of the plurality of arms is flexible. The cable guide includes a plurality of cable channels that are defined by the plurality of arms. The plurality of cable channels each receive a plurality of furcation tubes. Each of the plurality of cable channels is configured to allow furcation tubes to move within each of the plurality of cable channels. Each cable channel has an open position and a closed position. When in the open position, furcation tubes can be loaded and unloaded into and out of the cable channel. When in the closed position, furcation tubes are restricted from being removed from the cable channel.

An enclosure for accommodating splicing between cables is disclosed. The enclosure can include a housing containing a frame (e.g., a tray) to which the cables can be affixed. The housing can have an elongate in-line configuration, a triangular configuration, or other configurations. Cable reversing configurations and moveable adapter configurations are also disclosed.

A communications panel includes a chassis receiving one or more tray arrangements that each support one or more cassettes. Each cassette carries a plurality of ports at which connections are made between front and rear plug connectors. Each tray arrangement includes guides along which the cassettes slidably mount. The guides and cassettes are configured to enable cassettes of various size to mount to the same tray without reconfiguring the guides.

The invention provides a light super-soft fire-resistant flame-retardant optical cable and a preparation method thereof. The light super-soft fire-resistant flame-retardant optical cable sequentially comprises a high-temperature-resistant optical fiber, a filling layer, a flame-retardant loose tube, a reinforcing layer, a heat insulation layer and a fire-resistant flame-retardant layer from inside to outside, the fireproof flame-retardant layer comprises the following preparation raw materials in percentage by mass: 55-65% of plasma activated mineral powder, 25-35% of a thermoplastic elastomer base material subjected to irradiation crosslinking treatment, 8-12% of a phosphorus-nitrogen intumescent flame retardant and 1.5-2.5% of a silane coupling agent; the nano mineral powder comprises a magnesium aluminum silicate compound, and the thermoplastic elastomer matrix comprises a blend of SEBS (Styrene-Ethylene-Butylene-Styrene) and TPU (Thermoplastic Polyurethane). The fire-resistant flame-retardant layer forms a ceramic protection layer at high temperature to perform fire-resistant flame-retardant protection and prevent heat transfer, and meanwhile, the heat insulation layer is matched to further prevent heat from being transferred to the cable core, so that the performance of the optical cable is ensured not to be influenced.

The invention belongs to the technical field of optical fibers, and relates to an optical fiber ribbon easy to optically identify and detect and a manufacturing method. The optical fiber ribbon comprises a plurality of optical fibers and an adhesive tape, the plurality of optical fibers are arranged side by side and are in line contact in sequence, and the plurality of optical fibers are connected through the adhesive tape to form the optical fiber ribbon; the projection of the adhesive tape in the thickness direction of the optical fiber ribbon comprises a first corrugated line and a second corrugated line, the first corrugated line and the second corrugated line extend in a corrugated shape in the length direction of the optical fiber ribbon, and the two ends of the first corrugated line are connected with the two ends of the second corrugated line at the contact line of the optical fiber. And a corrugated identification loop is defined. The optical fiber ribbon provided by the invention has the effect of being easily optically identified and detected.

The invention discloses a multifunctional medium-voltage cable for power transmission, and relates to the technical field of cables, the outer side end of a transmission wire core is sleeved with an inner special-shaped insulation sleeve, a plurality of power connection processing strips are embedded into the outer side end of the inner special-shaped insulation sleeve at equal intervals, and the outer side ends of the inner special-shaped insulation sleeve and the power connection processing strips are sleeved with a central insulation sleeve; according to the invention, the external staggered heat insulation strips are utilized to reduce the influence of the external environment on the interior of the cable, and at the same time, the stable heat dissipation of the interior of the cable is ensured, so that the service life of the cable is prolonged, and the service life of the cable is prolonged. Therefore, when the cable runs, the situation that the internal temperature change is too large or too high due to the fact that the heat conduction part cannot be automatically adjusted can be avoided, the situation that the insulation part of the cable is accelerated to age due to continuous thermal expansion and cold contraction or excessive heating is reduced, the running stability of the cable is improved, and the service life of the cable is prolonged.

The utility model relates to the technical field of polarization maintaining optical fibers, and provides a high-reliability polarization maintaining optical fiber array which comprises a first limiting plate, a cover plate and a plurality of first cambered surface parts, the cover plate and the first limiting plate are detachably arranged, the first limiting plate is provided with a first limiting surface, and a pressure applying surface is formed on the surface, facing the first limiting surface, of the cover plate. One end or two ends of the pressure applying surface in the optical fiber direction are respectively inclined towards the direction deviating from the first limiting surface to form a first cambered surface part, the optical fiber direction is parallel to the axial direction of the polarization maintaining optical fiber, and the length of the pressure applying surface in the optical fiber direction is smaller than that of the first limiting surface in the optical fiber direction. By arranging the first cambered surface part, the contact part of the edge of the cover plate and the polarization maintaining optical fiber is a cambered surface, so that the contact area of the edge of the cover plate and the polarization maintaining optical fiber is increased, the phenomenon of local stress concentration of the polarization maintaining optical fiber is reduced, the probability that the polarization maintaining optical fiber is damaged by the cover plate in debugging is reduced, and the reliability is higher.

A fiber optic-based communications network includes: a power insertion device, connected to multiple fiber links from a data source, configured to provide power insertion to a hybrid fiber / power cable connected to at least one fiber link of the multiple fiber links; the hybrid fiber / power cable, connecting the power insertion device to a connection interface device, configured to transmit data and power from the power insertion device to the connection interface device; and the connection interface device, configured to provide an interface for connection to an end device via a power over Ethernet (POE)-compatible connection and to provide optical to electrical media conversion for data transmitted from the power insertion device to an end device via the hybrid fiber / power cable and the PoE-compatible connection.

A telecommunications tray is configured for mounting to a telecommunications fixture. The tray includes a removably mounted telecommunications module that defines a body that is enclosed by a cover to define an interior. The module includes radius limiters within the interior for managing cables and defines connection locations for inputting and / or outputting signals via cables for processing within the module, the telecommunications module movably mounted to the tray.

A fiber optic adapter block is disclosed. The fiber optic adapter block includes at least three fiber optic adapters provided in a stacked arrangement extending widthwise in a longitudinal direction, wherein every other adapter of the at least three fiber optic adapters is staggered in a front to back direction with respect to an adjacent adapter such that front ends of the every other adapter of the at least three fiber optic adapters are aligned at a first depth and a front end of the adjacent adapter is at a second depth that is different than the first depth.

The invention discloses an abnormal section positioning method suitable for a hollow-core optical fiber cable and a special test disc tool, and belongs to the technical field of hollow-core optical fiber cables, and the method comprises the following steps: configuring the special test disc tool and a test device; coiling the hollow-core optical fiber cable to be tested on the special test disc in a partitioned manner; performing a power return-to-zero test on the test device; connecting the testing device to the inner and outer ends of the to-be-tested hollow-core optical fiber cable, and carrying out primary measurement; and judging whether the result is abnormal or not, removing the hollow-core optical fiber cable in a partition cutting mode after the result is abnormal, connecting the remaining optical cable into the test device for re-measurement, and gradually switching the inner end and the outer end of the test optical cable in the partition cutting mode until the abnormal section of the optical cable is positioned. According to the method provided by the invention, the problem that the abnormal section positioning requirement of the optical cable cannot be met by a conventional winding method can be effectively solved, repeated rewinding of the hollow-core optical fiber cable is avoided, and the efficiency and precision of positioning the abnormal section of the hollow-core optical fiber cable are improved.

The utility model relates to a center twisting type ultra-weak fiber bragg grating temperature and humidity stranded yarn, which adopts a humidity ultra-weak fiber bragg grating array, the temperature ultra-weak fiber bragg grating array and Kevlar fibers are combined to wrap a spiral armor tube, and then a metal wire braid layer is braided along the axial direction to form a temperature and humidity intelligent monofilament; the temperature and humidity intelligent monofilament serves as a center filament and is twisted with the six stainless steel wires to form a cable shape, and the temperature and humidity stranded filament of the ultra-weak fiber grating is manufactured. According to the utility model, the long-distance temperature and humidity ultra-weak fiber grating array is adopted to monitor temperature and humidity, temperature compensation is facilitated, temperature and humidity changes can be quickly responded, the filamentation porosity is large, the response speed is high, the mechanical strength is high, the adaptability is strong, and subsequent processing is facilitated.

The invention discloses an airtight packaging structure and a hollow-core optical fiber transmission system.The airtight packaging structure comprises a packaging shell, an air pressure adjusting device, an air pressure monitoring device and a control device, the packaging shell is provided with an air cavity, a packaging hole and a communicating hole, and the packaging hole and the communicating hole are both communicated with the air cavity; the air pressure adjusting device is provided with an air vent communicated with the communicating hole, the air pressure monitoring device is connected with the cavity wall of the air cavity so that the air pressure of the air cavity can be monitored through the air pressure monitoring device, and the air pressure monitoring device and the air pressure adjusting device are both electrically connected with the control device. The control device is used for receiving the real-time air pressure value monitored by the air pressure monitoring device and controlling the air pressure adjusting device to adjust the air pressure of the air cavity based on the real-time air pressure value. According to the airtight packaging structure, the pressure of the inner cavity of the hollow-core optical fiber can be maintained, water vapor, air and the like in the external environment are prevented from permeating into the inner cavity of the hollow-core optical fiber, and the stability of a communication system is guaranteed.

The invention discloses a low-loss stress-resistant optical fiber and a preparation method and application thereof. The optical fiber comprises a fiber core, an inner cladding, an outer cladding, an outer protection layer and a hydrophobic layer which are sequentially arranged from inside to outside. According to the invention, through the innovation of the optical fiber structure, the stress resistance and the signal fidelity are synchronously improved, especially under the extreme mechanical deformation or temperature and humidity environment, the ultra-low loss is still maintained, and the reliable operation period of the system is greatly prolonged; through cooperation of the FBG and the optical fiber, the system can carry out high-precision decoupling analysis on multiple parameters of the cable, the false alarm rate is reduced by more than 40%, and the fault positioning precision reaches + / -0.5 m; due to the double protection design of the outer protection layer and the hydrophobic layer, the optical fiber can still maintain stable sensing sensitivity in severe scenes such as burying and soaking, collaborative optimization of mechanical performance and optical performance of the optical fiber is achieved, and the low-loss and high-strain-resistance characteristics of the optical fiber provide an ideal sensing carrier for cable safety monitoring. The monitoring system has the characteristics of multi-parameter fusion analysis, remote real-time early warning, strong environmental adaptability and the like.

Devices such as terminals comprising connection ports with associated securing features and methods for making the same are disclosed. In one embodiment, the device comprises a shell, at least one connection port, and at least one securing feature. The at least one connection port is disposed on the terminal with the at least one connection port comprising an optical connector opening extending from an outer surface of the terminal to a cavity of the terminal and defining a connection port passageway. The securing feature is associated with the connection port passageway and is biased by a resilient member having a predetermined pre-load restoring force to the retain position.

The invention discloses a high-strength rat-proof optical cable and a preparation method thereof. The high-strength rat-proof optical cable comprises at least one reinforcing piece, at least one cable core distributed outside the reinforcing piece, an inner protective layer wrapping the cable core, an armor layer wrapping the inner protective layer and a rat-proof outer sheath wrapping the armor layer, and the cable core is composed of at least one optical fiber and a loose tube; wherein the rat-proof outer sheath is prepared from the following raw materials in parts by weight: 70 to 80 parts of linear low-density polyethylene, 20 to 30 parts of nylon 12, 5 to 8 parts of compatilizer, 15 to 20 parts of modified composite filler, 1 to 3 parts of antioxidant and 0.5 to 1 part of lubricant. According to the high-strength rat-proof optical cable, the LLDPE / nylon 12 alloy matrix with a specific formula is adopted in the outer sheath, and the modified composite filler is introduced, so that the finally prepared optical cable outer sheath has excellent mechanical strength and wear resistance, and an efficient, long-acting and environment-friendly biological rat-proof effect is achieved.

A fiber optic adapter block is disclosed. The fiber optic adapter block includes at least three fiber optic adapters provided in a stacked arrangement extending widthwise in a longitudinal direction, wherein every other adapter of the at least three fiber optic adapters is staggered in a front to back direction with respect to an adjacent adapter such that front ends of the every other adapter of the at least three fiber optic adapters are aligned at a first depth and a front end of the adjacent adapter is at a second depth that is different than the first depth.

A fiber optic tray enclosure is provided, including a base tray including a base wall extending along a lengthwise direction and a widthwise direction. the base wall forming a fastener opening configured to receive a fastener. The side wall is attachable to the base wall at the fastener opening. A plurality of mount plates is attachable to the base wall and separated from one another along the lengthwise direction. The mount plates forming an opening configured to receive a telecommunications adapter. A top wall is attachable to the mount plate, wherein the top wall, the base wall, the side wall, and the pair of mount plates form an interior volume therebetween.

The invention discloses an anti-torsion butterfly-shaped leading-in optical cable and a manufacturing method, relates to the technical field of optical cables, and can solve the problem of poor torsion resistance of a butterfly-shaped optical cable in the prior art. The embodiment of the invention discloses an anti-torsion butterfly-shaped leading-in optical cable, which comprises an optical cable main body, the optical cable main body comprises a butterfly-shaped sheath, a traction reinforcing piece and an optical fiber assembly, and also comprises a plurality of anti-torsion plastic frameworks which are fixed on the traction reinforcing piece in an injection molding manner along the axial direction of the traction reinforcing piece, and the anti-torsion plastic frameworks are C-shaped; the torsion-compression-resistant plastic frameworks on the two traction reinforcing pieces are arranged in an opposite buckling manner; under the condition that the optical cable main body is subjected to torsion or pressure, the two torsion-compression-resistant plastic skeletons are close to each other to be in an integrated state, the two traction reinforcing pieces and the two torsion-compression-resistant plastic skeletons form a torsion-compression-resistant skeleton cage, and the optical fiber assembly is located at the central position of the torsion-compression-resistant skeleton cage; and under the condition that the light blue main body is subjected to radial tension, the two torsion-compression-resistant plastic frameworks can be far away from each other to be in a separated state.

Fibre optic cables 101-120, for use in a data communications network are adapted to be laid, along at least part of their length within a pipe (or conduit) 1 carrying a fluid and comprise fibres adapted for sensing the condition within or in the vicinity of the pipe 1. The cables 101-120 are constructed with sensing fibres 12 provided in edge interstitial spaces 19 between data fibre bundles 11. In further embodiments, the cables may comprise electrical conductors 22, 23 or one or more power fibres 15. Optionally, the cable is additionally provided with outer sensing fibres 14 which replace one or more wires in the armour 32. The cables 101-120 are optionally adapted to remain stably positioned in the invert 2 of the pipe 1 by suitable selection of stiffness and relative density compared to the fluid and / or the provision of surface formations to reduce lift and / or drag forces experienced by the cable as a result of fluid flow.

The utility model discloses a hollow-core and solid-core hybrid optical fiber cable, which belongs to the technical field of hollow-core optical fiber cables and comprises at least one hollow-core optical fiber, and each hollow-core optical fiber comprises a hollow-core unit and a wrapping layer. The hollow core unit comprises a plurality of hollow core glass tubes which are annularly arranged at equal intervals, and the hollow core glass tubes provide air fiber cores for the hollow core optical fiber to complete optical signal transmission; the cladding is a quartz cladding, and at least two solid fiber cores are arranged in the cladding; the axis of the solid fiber core and the axis of the hollow glass tube are both parallel to the axis of the hollow fiber. The optical cable provided by the utility model not only can meet the end face positioning requirement when the end face of the hollow-core optical fiber is centered and welded, but also can enable the hollow-core optical fiber to have the capability of breakpoint detection, meets the application of the OTDR technology in the hollow-core optical fiber, improves the application and maintenance convenience of the hollow-core optical fiber, and is matched with the mixed cabling of the hollow-core optical fiber and the G.652D, G.654E or G.655 solid-core optical fiber, so that the service life of the hollow-core optical fiber is prolonged, and the service life of the hollow-core optical fiber is prolonged. The comprehensive performance and the application range of the hybrid optical cable are greatly improved, and the hybrid optical cable has excellent practical value.

The present disclosure provides a hybrid optical fiber comprising a hollow core fiber section having a first end and a second end, one or more end fiber sections coupled to at least one end of the hollow core fiber section, and optionally a buffer tube encapsulating at least the hollow core fiber section. A hybrid optical cable may include a sheathing and two or more such hybrid optical fibers. Methods may include fabricating hybrid optical fibers by coupling glass core fiber sections to hollow core fiber sections, winding on a reel, and testing. Another method may involve installing and coupling hybrid optical fibers based on inspection results. The hollow core fiber sections may comprise various designs including anti-resonant, photonic bandgap, or nested structures.