679 results about "Optical fiber cable" patented technology

Disclosed herein is an angular optical component retention and removal system that reduces the amount of space needed to accommodate fiber optic cables and enables optical components to be quickly and easily inserted, retained, and removed from an optical communications system. The optical component retention and removal system may include a single or plural angular retention sections that retain optical components in an angular orientation through a faceplate. The system may further include an insertion / retention mechanism that enables an optical component to be inserted and removed with a single hand. With the system, fiber optic cables extend at an angle from the optical components, requiring less clearance space in front of the faceplate for provision of the fiber optic cables.

The invention discloses an optical cable intelligent label full life cycle management method and system, and the method comprises the steps: extracting structured data through an XML analysis engine based on a configuration file, carrying out the semantic analysis of an unstructured text, carrying out the regression quantification of text features through combining symbol quantiles, and constructing a knowledge graph; according to the knowledge graph, dynamically adjusting the character size, the two-dimensional code position and the error-tolerant rate by adopting a generative adversarial network technology according to the optical cable type and the pasting scene, and generating optical cable intelligent labels adaptive to different scenes; collecting a label image, and converting the label image into structured label identification data including an optical cable type, a connection relation and a transmission signal type by adopting a computer vision technology; the identification data and the knowledge graph are compared, consistency is checked, potential abnormity is analyzed, influences are evaluated, and graded early warning is generated; a micro-service architecture system is constructed, data analysis, AI generation, an intelligent recognition engine and knowledge graph service are integrated, and full-life-cycle management is achieved. The intelligent level of full-life-cycle management of the optical cable label is improved.

The invention provides a hollow-core optical fiber cable fiber breakage detection method based on a reference optical fiber and an optical cable, and belongs to the technical field of optical fiber communication. The method comprises the following steps: acquiring monitoring data of a reference optical fiber in a hollow-core optical fiber cable, and performing quality evaluation on the data to generate a signal quality comprehensive score; when the score is higher than a preset threshold value, feature extraction and dynamic weighted fusion are carried out to generate a comprehensive feature vector; outputting a fiber breakage probability by using the fiber breakage state recognition model, calculating a fiber breakage risk value through a prediction model in combination with time sequence data, and obtaining a fiber breakage risk index through a risk fusion algorithm; and finally, matching and executing a hierarchical response strategy according to the risk index. According to the invention, multi-modal data fusion, intelligent state identification and active early warning are realized, and the reliability, precision and operation and maintenance efficiency of broken fiber detection are significantly improved.

The invention relates to the field of optical fiber cable preparation, and discloses an optical fiber cable preparation method and a pressure control device.The method comprises the steps that an optical fiber preform is prepared, and a sleeve is coaxially assembled outside the optical fiber preform; extending the optical fiber preform and the sleeve through two extension pipes; a cavity between one ends of the two extension pipes is blocked through a blocking piece; performing wire drawing treatment on the optical fiber preform, and dynamically adjusting micro-positive pressure and negative pressure in the optical fiber preform and between the optical fiber preform and the sleeve at the same time; the device has the beneficial effects that the problem of low stacking efficiency of the hollow optical fiber caused by deformation of the capillary tube is avoided by setting the micro-positive pressure in the optical fiber preform 1 and the negative pressure between the optical fiber preform 1 and the sleeve 2, the manufacturing efficiency is improved, and the product quality is improved.

In some embodiments, a fiber optic cable may be monitored while reducing false positives from disturbances in trusted areas. In some embodiments, a system includes a light source, a first remote termination unit in a trusted area, and a second remote termination unit in another trusted area. The light source emits light through the fiber optic cable, which passes through the first remote termination unit, an untrusted area, and then the second remote termination unit. The remote termination units reflect portions of the light back towards the light source. The system uses a prediction model to detect disturbances in the untrusted area based on the reflected light data.

Disclosed are systems and methods that employ distributed fiber optic sensing (DFOS) / distributed acoustic sensing (DAS) to monitor and provide real-time estimation of ice thickness on fiber optic communications facilities, and which integrate DSA data with a hybrid processing technique that combines frequency domain decomposition (FDD) and stochastic subspace identification (SSI). Aspects of our innovative systems and methods include: i) Hybrid Signal Processing Techniques; ii) Real-time, Continuous Ice Monitoring; iii) Enhanced Noise Robustness and Non-linear Dynamics Handling; and iv) Adaptability and Scalability.

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.

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.

A system for calibrating the light sensitivity of a camera includes a light emitter for emitting a light pulse, a fiber splitter for receiving the light pulse via an input port and providing first and second portions of the light pulse to respective first and second output ports, and a light collector for receiving the first portion from the first output port and converting the first portion to a first signal representative of a light characteristic of the first portion. A first fiber optic cable connects the light emitter and the input port, a second fiber optic cable connects the first output port and the light collector, and a third fiber optic cable has a first cable end connected with the second output port and a second cable end for emitting the second portion of the light pulse for capture by the camera. A related method is also provided.

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.

Fibre optic cables (100), 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 (100) comprise one or more data fibre bundles (11) and armour (32) in the form of a layer of protective wires provided around the data fibre bundles (11). The cable (100) is additionally provided with outer sensing fibres (14) which replace one or more wires in the armour (32). The cables (100) 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.

A method of improving heat recovery from a geothermal well includes receiving temperature distribution data from a distributed temperature sensing (DTS) system comprising a fiber optic cable disposed in a wellbore, which extends through a formation; analyzing the temperature distribution data to determine a fluid flow profile along the wellbore; determining, based on the fluid flow profile, a location of dominant flow rate; and injecting a sealing agent into the formation at the location. When the sealing agent cures, fractures within a fracture system are sealed in the formation at the location. The cured sealing agent prevents or mitigates fluid flow through the formation at the location.

The utility model discloses a rat-proof aerial optical cable, which belongs to the technical field of optical fiber cables, solves the problem that in order to ensure mechanical strength and rat-proof performance, the rat-proof aerial optical cable is high in structure and material arrangement cost, and comprises an optical cable jacket, a plurality of barb mechanisms are uniformly arranged on the outer surface of the optical cable jacket at intervals along the axial direction of the optical cable jacket, and barb binding pieces are coated on the outer surfaces of the optical cable jacket and the plurality of barb mechanisms; wherein the barb mechanism comprises a fixing piece which is attached to and fixedly connected with the optical cable jacket, one end of the fixing piece is connected with a first barb piece, the first barb piece is elastically connected with the fixing piece, and the barb binding piece is used for elastically binding the first barb piece on the surface of the optical cable jacket. The rat-proof structure for the aerial optical cable is provided with the rat-proof barbs, so that the barbs can be unfolded by removing the barb binding pieces when the optical cable is laid, and transportation and laying are facilitated.

The invention relates to the technical field of structural health detection, and discloses an FBG and distributed optical fiber-based pipeline deformation leakage dual-mode detection device, which comprises an FBG soil pressure meter, an FBG pore pressure meter, an FBG liquid level meter, an FBG strain meter, a distributed optical fiber, a cable, a BOTDA demodulator, an FBG demodulator, a computer and a visual LED lamp. The FBG soil pressure meter, the FBG pore pressure meter, the FBG liquid level meter and the FBG strain meter are respectively arranged in four directions of the pipeline, the distributed optical fibers are spirally arranged on the surface of the pipeline, and the health state of the pipeline is evaluated by detecting the strain and temperature of a pipeline body and the relative soil pressure change, the relative pore pressure change and the relative liquid level change of the surrounding environment. According to the invention, the health state of the pipeline can be monitored in real time more accurately.

The invention discloses an end sealing structure and sealing method of a hollow-core optical fiber cable and a sealing prefabricated cable, and belongs to the technical field of hollow-core optical fiber matching, the end sealing structure comprises a sealing element, a sealing locking cap and a sealing thermal shrinkage cap which are arranged in a combined mode, and the three sealing elements are sequentially arranged at the end of the hollow-core optical fiber cable; multi-stage sealing of the end part of the hollow-core optical fiber cable can be realized, and the end part sealing effect of the hollow-core optical fiber cable is effectively ensured while the arrangement reliability of the end part sealing structure at the end part of the optical cable is ensured. The end sealing structure of the hollow-core optical fiber cable is simple in structure and convenient to assemble, end sealing of the hollow-core optical fiber cable can be reliably achieved, the situation that impurities enter a transmission channel of the hollow-core optical fiber to affect the follow-up transmission quality of the hollow-core optical fiber cable is avoided, the hollow-core optical fiber cable can be laid in a humid environment or a complex gas environment, and the service life of the hollow-core optical fiber cable is prolonged. The convenience of laying and using the hollow-core optical fiber cable is effectively improved, and the hollow-core optical fiber cable has excellent use value.

Provided is a monitoring system that includes: a detection position acquisition means that acquires a first detection position at which vibration was detected at a first optical fiber cable and a second detection position at which vibration was detected at a second optical fiber cable that is spaced at an interval from the first optical fiber cable; and a crossing angle estimation means that estimates the crossing angle at which a mobile body has crossed the first optical fiber cable and the second optical fiber cable on the basis of the first detection position and the second detection position.

The application relates to the technical field of laser measuring instruments, in particular to a high-bandwidth CAT6-optical fiber composite communication cable system, which comprises a composite cable module, a test module and a control module; the composite cable module is used for forming a composite communication cable pair through a CAT6 network cable and an optical fiber cable to transmit communication signals; the test module is connected with the composite cable module and is used for testing the performance of the composite communication cable, and comprises a signal generator used for providing a test signal, a filter connected with the signal generator and used for filtering the test signal, and a temperature sensor arranged in a test area and used for detecting the temperature of the test area; the control module is connected with the composite cable module and the test module and is used for determining the bit error rate threshold of the optical fiber cable according to the average transmission delay duration of the test signal; and the application improves the test stability of the composite communication cable.

A method of performing a field (100) measurement is disclosed. The method comprises: arranging a landing dock (122) at a target location in the field, the landing dock (122) coupled to a fiber optic cable (123) for distributed fiber optic sensing measurements; guiding an unmanned aerial vehicle (UAV) (150) to land on a landing dock, the UAV (150) comprising an interrogator unit (151); communicatively coupling the interrogator unit (151) and the fiber optic cable (123) in response to the UAV landing on the landing dock (122); transmitting, by the interrogator unit (151), the light pulses to the fiber optic cable (123); receiving backscattered light from the fiber optic cable (123) in response to transmitting the light pulse; and generating, by the interrogator unit (151), a measurement of the target position based on the received backscattered light.

The utility model relates to the technical field of optical fiber cable transmission engineering, and discloses a firmly-connected difficult-to-damage optical cable identification tag, which comprises a coding strip, an identification plate is slidably connected to the inner wall of the coding strip, fixing holes are arranged at two ends of the coding strip, numeric string identifications are arranged on the identification plate, and the number string identifications are arranged on the coding strip. A first sliding groove and a second sliding groove are formed in the coding strip, an elastic clamping plate is fixedly connected to the outer wall of the identification plate, the outer wall of the elastic clamping plate is connected to the inner wall of the second sliding groove, and the outer wall of the elastic clamping plate is slidably connected to the inner wall of the first sliding groove. According to the utility model, through the mutual cooperation of the coding strip, the elastic clamping plate, the first sliding groove and the second sliding groove, the identification plate can be disassembled, when the label is damaged and information is changed, a new label can be conveniently disassembled and replaced or information is rewritten without damaging an optical cable and peripheral facilities, and the cost and time are saved.

An example test system includes a probe card configured to contact a device under test (DUT); a module including a first optical connector configured to contact a second optical connector on the DUT, with the first optical connector being for a fiber optic cable; and a motion system configured to move into, and out of, contact with the module. When the motion system is in contact with the module, the motion system is configured to move the module relative to the DUT in order to align the first optical connector to the second optical connector.

An optical fiber cable is provided comprising a core comprising an optical fiber, a wrapping tube wrapping the core, a jacket housing the core and the wrapping tube, a tension-resisting member of a fiber reinforced plastics (FRP) embedded in the jacket and a wire member which is flexible, includes fibers, and is embedded in the jacket. In a transverse cross-sectional view, the wire member is located inside a virtual circle that has a center which is a center axis of the core and that passes through a center of the tension-resisting member. A circumferential dimension of the wire member is greater than a radial dimension of the wire member.

A high-power multiplexer / demultiplexer ("mux / demux") and a three-dimensional ("3D") printed phase mask are provided for hollow-core optical fiber applications. The high-power mux / demux includes hollow core optical fiber interfaces configured to couple with free-space optical fiber cables, a diffraction grating, a 3D printed phase mask, and a set of lenses. The diffraction grating is configured, based on different wavelengths, either to at least diffract each optical signal of a plurality of optical signals having different wavelengths into two or more optical signals or to at least diffract a single optical signal having multiple wavelengths into a plurality of optical signals. The phase mask includes reflective features configured to reflect optical signals at different optical path lengths to provide reflected optical signals with different phases. The set of lenses is configured to collimate optical signals onto or from the diffraction grating or to focus optical signals onto or from the phase mask.

A kit for an encryption system characterized in that the kit consists of two mobile phones, a positioning device, several connecting elements, commercially available software for text, sound, image and video processing and a USB plug in which a camera, a light-sensitive photodiode, a laser diode, a microphone, a loudspeaker and a connector for fiber optic cables are arranged.

The present disclosure relates to a system for making or assembling fiber optic connectors that allows a pre-terminated fiber optic cable to be made compatible with any number of different styles or types of fiber optic connectors or fiber optic adapters. The present disclosure also relates to a fiber optic connector having first and second pieces connected to twist-to-engage interface and also including a rotational interlock. The present disclaimer relates to a fiber optic connector having a boot that mounts in multiple different axial positions.

A cassette configured for the installation in a fiber enclosure system. The cassette includes a base, a first wall including a first front post, a second wall including a second front post, and a front wall with an opening including an adapter configured to connect to at least one fiber optic cable. The cassette further includes a latch located on the first wall configured to releasably connect the cassette to the fiber enclosure system, where a cassette lock is configured to retract the latch when the lock is actuated away from a rear of the cassette and deploy the latch when the lock is actuated toward the rear of the cassette.

The present disclosure provides a micro sheath buffer tube with rollable optical fiber ribbons for optical fiber cable to reduce the overall cable diameter. The buffer tube indicates one or more subunits, a micro sheath layer and a plurality of water swellable yarns. The one or more subunits encloses a plurality of optical fiber ribbons. Each optical fiber ribbon of the plurality of optical fiber ribbons includes 12 optical fibers. Further, each of a plurality of optical fibers is a colored optical fiber. In addition, the micro sheath layer surrounds the one or more subunits. Furthermore, the one or more subunits has a coating layer of low smoke zero halogen material.

A system may include a fiber optic cable buried under a surface and a smart sensor module coupled to the fiber optic cable. A controller may be coupled to the smart sensor module. The smart sensor module includes a light source coupled to an end of the fiber optic cable and a detector coupled to the end of the fiber optic cable. The controller may manage a transmission of a pulse of light from the light source to launch the pulse of light into the fiber optic cable. The detector may receive a backscatter generated from the pulse of light scattered off fiber molecules of the fiber optic cable. The smart sensor module may determine a temperature of the fiber optic cable based on an intensity of the generated backscatter. The controller may send an alert when the determined temperature is outside a predetermined threshold range from a base temperature.

The purpose of the present invention is to provide a vibration analysis processing device that is capable of identifying the location of occurrence of an event without being affected by an installation environment of an optical fiber.　A vibration analysis processing device 10 comprises: an input unit 11 that receives input of vibration data which is transmitted to an optical fiber cable 50 and which has been measured by a vibration measuring instrument 20; and a computation processing unit 12 that divides the optical fiber cable 50 into a plurality of sections in a distance direction, and, on the basis of the vibration data, generates, for each of the sections, a bit sequence in which bits are given indicating whether or not a specific vibration of a specific frequency component is occurring, that generates a determination value sequence in which moving average values calculated for the bit sequence with an arbitrary window size in the distance direction are arranged in the distance direction, and that detects a point or an area where the moving average value exceeds an arbitrary threshold value in the determination value sequence.

An optical fiber cable includes a cable main body including 3000 or more optical fibers, a sheath material receiving therein the optical fibers, and a multi-fiber connector connected to ends of the optical fibers, in which the sheath material includes 0.2% or more by mass and 1.5% or less by mass of silicone.

An optical switch and system including the same are provided. The optical switch includes (i) a fastening portion configured to releasably attach directly or indirectly to a fuse casing, (ii) a cable connecting portion including a first fiber optic cable connection port, a second fiber optic cable connection port, and an optical through-channel extending from the first fiber optic cable connection port and the second fiber optic connection port; and (iii) an actuator configured to move between a first position associated with a non-blown fuse and a second position associated with a blown fuse. The actuator includes an optical blocking portion that is moved into or within the optical through-channel of the cable connecting portion when the actuator is in the second position.