29 results about "Fusion splicing" patented technology

The invention relates to a welding discharge system, and relates to the technical field of optical fiber welding, the welding discharge system comprises a main control module, a driving voltage adjusting module and three flyback boost modules, the driving voltage adjusting module is controlled by the main control module to output an adjustable primary power supply voltage, and the flyback boost modules are connected with the main control module. The primary sides of the three flyback boost modules are connected in parallel to primary power supply voltage, the secondary sides of the three flyback boost modules are connected to the corresponding discharge electrodes, and the main control module is configured to output three paths of PWM driving signals with the same frequency to the three flyback boost modules, the discharge electrode in high-voltage release discharges to the other two discharge electrodes in relatively low potential, so that the three discharge electrodes are driven to generate phase rotation in space, and a rotary discharge arc around the optical fiber is formed; therefore, the problem of non-uniform heating caused by heat concentration in a fixed discharge direction and insufficient heat radiation in other directions is solved.

A fusion splicing machine according to one embodiment includes: an optical fiber holder holding an optical fiber in the state where a tip end of the optical fiber protrudes; a rotation mechanism arranged on the opposite side of the optical fiber holder to the tip end of the optical fiber and rotating the optical fiber holder around the axis extending along the optical fiber; and a clamp unit pressing the tip end portion of the optical fiber held by the optical fiber holder. The rotation mechanism rotates the clamp unit together with the optical fiber holder.

A fusion splicing system includes a fusion splicer including a fusion mechanism to fusion-splice optical fibers, and a control unit configured to control an operation of the fusion mechanism, a first information terminal capable of communicating with the fusion splicer, and a server capable of communicating with the first information terminal. The control unit is configured to set locking on an operation of the fusion mechanism before use. The first information terminal acquires locking release information to temporarily release the locking setting from the server, and transmits a locking release command signal including the locking release information to the fusion splicer. The control unit determines whether or not the locking release information included in the received locking release command signal is appropriate, and temporarily releases the locking setting on the fusion mechanism to enable the fusion mechanism when the locking release information is appropriate.

This map information generation system comprises: a fusion splicer; a communication unit that receives fusion splicing data; and a generation unit that executes generation processing for generating map information of a target optical fiber line. The generation processing includes a step for setting, as a reference point, a point the position of which has been previously specified, a step for acquiring first distance information indicating the distance between the reference point and a first-order adjacent point, a step for setting a range for determining a candidate point serving as the first-order adjacent point on the basis of the first distance information; a step for determining, as the first-order adjacent point, a candidate point located within the range among a plurality of candidate points; and a step for generating the map information on the basis of the position of the reference point and the position of the first-order adjacent point.

The utility model discloses a kind of double-parameter optical fiber laser sensors based on Sagnac ring cascaded liquid phase filling MZI, belong to optical fiber sensor technical field, by LD pumped laser source (1), wavelength division multiplexer (2), holmium-doped optical fiber (3), optical circulator (4), sensing probe A (5), first coupler (6), sensing probe B (7), second coupler (8), optical spectrum analyzer (9), first single-mode optical fiber (501) polished in side edge, large core diameter hollow optical fiber (502) fills PDMS (503), few-mode optical fiber (504), fiber bragg grating (505), second single-mode optical fiber (506), third single-mode optical fiber (701), first panda polarization maintaining fiber (702), second panda polarization maintaining fiber (703), fourth single-mode optical fiber (704);The utility model can effectively improve the sensitivity of device to temperature by hollow optical fiber filling PDMS;By panda polarization maintaining fiber rotation shaft fusion splicing makes that interference phase difference amplification, spectral line drift is more obvious, so improve the sensitivity of device to temperature;Different reflection peak signals of few-mode optical fiber grating and Sagnac interference spectrum signals can establish sensitivity matrix to realize double-parameter measurement to temperature and strain, with excellent reliability and stability.

This utility model discloses a rotating mechanism for driving optical fibers in a hollow-core optical fiber fusion splicer. The mechanism includes a rotating mechanism body, with an optical fiber rotation positioning mechanism mounted at the front. A rotating seat is mounted on the optical fiber rotation positioning mechanism, and a notch is formed on the surface of the rotating seat. An optical fiber is inserted through the notch. A conductive slip ring is mounted on the rotating mechanism body, and a driving ring is movably mounted inside the conductive slip ring. Connecting seats are fixedly mounted on both sides of the end of the driving ring, and the connecting seats are screwed to the end face of the rotating seat. This rotating mechanism allows the optical fiber to rotate during thermal fusion welding. By rotating the optical fiber, the optimal alignment angle can be found, reducing fusion loss caused by the irregularity of the optical fiber itself. This ensures that the two optical fibers can achieve ideal concentric alignment during fusion splicing, avoiding limitations on the transmission bandwidth and data transmission rate of the optical fiber communication system, which could lead to signal distortion and affect communication quality.

This utility model belongs to the technical field of fiber optic amplifier equipment, specifically relating to a C-band few-mode erbium-doped fiber amplifier, comprising: an input-end few-mode pigtail, an input-end few-mode to single-mode mode field adapter, an input-end single-mode isolator, a single-mode wavelength division multiplexer, a single-mode pump, a single-mode erbium-doped fiber, an output-end single-mode isolator, an output-end single-mode to few-mode mode field adapter, and an output-end few-mode pigtail; wherein, the input-end few-mode pigtail, the input-end few-mode to single-mode mode field adapter, the input-end single-mode isolator, the single-mode wavelength division multiplexer, the single-mode erbium-doped fiber, the output-end single-mode isolator, the output-end single-mode to few-mode mode field adapter, and the output-end few-mode pigtail are sequentially connected by fiber optic fusion splicing; the single-mode pump and the single-mode wavelength division multiplexer are connected by fiber optic fusion splicing.

This application provides a ring beam shaping system based on multimode fiber mode interferometry, comprising an input unit, a mode conversion unit, and an output unit. The input unit is a single-mode fiber with a first fiber parameter, used to input a Gaussian beam. The mode conversion unit is a multimode fiber with a second fiber parameter, connected to the single-mode fiber via fusion splicing, used to excite and interfere with higher-order modes. The output unit is a ring-core fiber with a third fiber parameter, connected to the mode conversion unit via fusion splicing, used to maintain and output a ring beam distribution. The core diameters of the single-mode fiber, multimode fiber, and ring-core fiber increase progressively, as do the NA values ​​of the single-mode fiber, multimode fiber, and ring-core fiber. This system achieves high-quality ring beam output through a simple, flexible, and efficient all-fiber structure, significantly reducing cost and complexity, improving stability and reliability, and has broad application prospects.

An optical cable is provided, comprising an outer sheath (100), a main optical fiber (200), and at least two strength elements (300). The main optical fiber (200) and the strength elements (300) are located within the outer sheath (100). Furthermore, the main optical fiber (200) and the strength elements (300) have the same direction of extension. At least two strength elements (300) are separated on an outer periphery of the main optical fiber (200), and at least one strength element (300) is an auxiliary optical fiber. At least one strength element (300) on one side of the main optical fiber (200) is arranged as an auxiliary optical fiber. In this way, the auxiliary optical fiber serving as a strength element (300) can enhance the tensile strength of the entire optical cable, protecting the main optical fiber (200) from damage by external forces.Furthermore, the auxiliary optical fiber can also be configured to transmit an optical signal. If the main optical fiber (200) is damaged, the auxiliary optical fiber can be directly spliced ​​using fusion splicing without replacing the entire optical cable, and then used for signal transmission. This ensures the continued operation of the optical cable, simplifies maintenance, and reduces maintenance costs.

This utility model relates to the field of fusion splicing device technology, specifically a fusion splicing device for single-mode optical fiber. It includes a base, a displacement component located on the top of the base near the left side, and a first conveying component, a cutting component, and a first positioning component arranged sequentially from left to right on the top of the displacement component. A second conveying component is located on the top of the base near the right side, and a second positioning component is located to the left of the second conveying component. A fusion arc generator is located between the second positioning component and the first positioning component. This single-mode optical fiber fusion splicing device provides stable support to the bottom of the single-mode optical fiber through a first arc-shaped guide plate. Combined with the precise downward cutting of the cutter at the rectangular clearance hole, it effectively prevents bending deformation caused by the flexibility of the optical fiber during the cutting process, ensuring a flat cut end face and providing a high-quality mating surface for subsequent fusion splicing, significantly improving fusion splicing reliability.

The present disclosure relates to the field of coupling and packaging of high-temperature sensors, in particular, to a coupling and packaging device and method for an integrated high-temperature optical fiber sensor based on laser fusion splicing. The device includes: a laser fusion splicing module, a motion control module, and a signal detection module, wherein the laser fusion splicing module is configured to provide fusion splicing laser to the motion control module to weld and fix a tail end of an optical fiber pigtail and a sensitive unit; the motion control module includes a three-dimensional displacement platform as pedestal, an optical fiber five-dimensional displacement platform, an optical fiber clamping member, a sensitive unit clamping member, a rotating platform, and a sensitive unit three-dimensional displacement platform, and is configured to achieve the alignment and adjustment of a fusion splicing position; and the signal detection module is configured to monitor a spectral signal in the sensor in real time. The present disclosure may achieve the integrated coupling and packaging of a homogeneous material of the high-temperature optical fiber sensor.

The application discloses a kind of modular component self-pressure fusion splicing method and system, belong to space on-orbit manufacturing technical field.The method comprises: providing first module element and second module element with self-locking structure, at least one module element connection area has densification layer higher than matrix density;Assemble the first module element with second module element;Heating makes densification layer area melt, utilize the volume expansion in the process of melting is limited in the connection interface and generates self-pressure, and solidification forms connection under the self-pressure.By adjusting the densification degree, the self-pressure value can be preset, and different connection requirements can be flexibly adapted.The application realizes high-quality connection without external pressure and inert gas protection through the synergistic effect of self-locking structure and densification layer melting expansion, and the joint performance based on theoretical calculation can approach the level of base material.The optional anchoring structure further increases the solidification contact area and improves the connection strength.It is especially suitable for large-scale component on-orbit manufacturing in microgravity environment such as space station, lunar base and the like.

A fusion splicing method includes a step of exposing a glass fiber in a distal end region of an optical fiber strand, a step of disposing the optical fiber strand in a V-shaped groove, a step of pressing the optical fiber strand disposed in the V-shaped groove against the V-shaped groove by a clamp, and a step of causing the optical fiber strand to slide on the V-shaped groove. In the step of disposing the optical fiber strand in the V-shaped groove, a region of the coating portion that is not removed in the optical fiber strand is disposed in the V-shaped groove.

The utility model discloses a kind of optical fiber distribution units of fusion integration, belong to optical fiber data communication technical field;Including distribution unit body, distribution unit body is divided into left optical fiber winding area and right optical fiber fusion area, wherein horizontal setting has fiber storage cylinder in optical fiber winding area, multiple integrated trays are uniformly distributed in optical fiber fusion area vertically;Integrated tray is provided with lower layer fiber storage area and upper layer winding area, the middle part of upper layer winding area is provided with optical fiber protection tube placement area, left and right two ends are respectively provided with two layers of arc-shaped wire clamping device inside and outside symmetry, front and rear two ends are respectively provided with two layers of straight plate wire clamping device inside and outside symmetry, arc-shaped wire clamping device between inside and outside layer, straight plate wire clamping device jointly constitute optical fiber wiring channel.The utility model device will be integrated tray with fiber storage cylinder through internal optical fiber connection integrated design, not only reduce the size of integrated tray, but also can reduce the space occupied by overall structure.

The present application relates to the technical field of optical gyroscopes, and specifically relates to a resonant fiber-optic gyroscope driven by a low-power broadband light source and a working method thereof. The fiber-optic gyroscope comprises an ASE light source, a circulator, a Y waveguide, a fiber resonant cavity, a first coupler, a second coupler, a photoelectric detector, and a signal processing unit. The ASE light source is connected to the circulator, and the circulator is connected to the input port of the Y waveguide and the photoelectric detector. The first coupler and the second coupler each have four ports. The Y waveguide is connected to port 1 of the first coupler and port 1 of the second coupler. The fiber resonant cavity is composed of the first coupler, the second coupler, and a section of fiber coil. Port 2 of the first coupler and port 2 of the second coupler are through-arm ports, and port 2 of the first coupler and port 2 of the second coupler are connected by means of 90° polarization axis rotation fusion splicing polarization maintaining optical fiber. The present application can significantly improve the utilization rate of the light source, effectively improve the stability and sensitivity of the system, and has significant engineering application potential.

This invention discloses a method for using an optical cable splice box for emergency repair of fiber optic composite submarine cables. The splice box comprises a main body module and an optical cable sealing and fixing module. First, the optical cable is stripped in layers according to specified dimensions to create a stepped interface. Then, the optical cable sealing and fixing module is assembled. The assembled module is screwed into the module fixing hole on the side of the splice box, and the stainless steel tube layer of the optical cable is fixed to the optical fiber fixing seat. A grounding wire is then pressed in, and the optical fiber is fused together. After fusion splicing, the optical fiber is coiled in a fusion coil. After coiling, the splice box cover and body are closed, and the external screws are tightened sequentially to complete the installation. This invention uses a modular design, has excellent water-blocking and tensile strength, and offers advantages such as wide adaptability, simple operation, and reliable performance.

The application discloses a flexible optical fiber ribbon, an optical unit and an optical cable, and belongs to the technical field of optical cables. The flexible optical fiber ribbon comprises a plurality of optical fibers which are bonded by axial discontinuous bonding portions, and the plurality of optical fibers are arranged in transverse parallel in an unfolded state. The flexible optical fiber ribbon is divided into a first part and a second part by a plane where the central axes of the plurality of optical fibers are located. At least one of the first part and the second part satisfies the following conditions: any point A on the cross section of the bonding portion in contact with the optical fiber satisfies D A / D≤0.25; and a pole point B on the cross section profile of the bonding portion satisfies D B / D≤0.134. In the application, the flexible optical fiber ribbon controls the forming shape of the bonding portion, so that when the optical fibers connected by the bonding portion fall into a V-shaped clamp, the pole point of the bonding portion and any position are not in contact with the V-shaped groove or the contact does not deform, so that the flexible optical fiber ribbon is in the same height on the V-shaped groove, and the flexible optical fiber ribbon is effectively reduced in the fusion splicing error rate.

An optical fiber fusion splicer includes an image acquisition unit, a condition setting unit, and a fusion splicing unit. The image acquisition unit acquires an image including each of end surfaces of first and second optical fibers that are splicing targets in a state where the end surfaces of the first and second optical fibers are disposed to face each other. The condition setting unit sets splicing conditions in accordance with a state of each of the end surfaces by identifying the state of each of the end surfaces on the basis of the image. The fusion splicing unit fusion-splices the first and second optical fibers together by means of discharge between a pair of electrode bars in accordance with the splicing conditions set by the condition setting unit.

This invention discloses a method and system for melting and splicing modular large components suitable for microgravity environments, belonging to the field of on-orbit manufacturing technology for space. The method includes: providing prefabricated metal modules; installing a constraint mold around the surfaces to be joined to form a closed cavity; joining the surfaces to be joined; melting the joint area by applying current and using contact resistance heating; applying pressure and acting on the molten metal through the constraint mold; and removing the mold after pressure holding and solidification. Preferably, the surfaces to be joined are mutually matching non-planar geometric joint surfaces, with a micro-bump array and flow-guiding microgrooves on their surfaces; the method also includes being carried out under a low-pressure inert atmosphere of 200-400 Pa. The system includes a module storage unit and a connection operation unit. This invention, through the organic combination of constraint molds and electric heating, combined with a precisely designed non-planar interface and a low-pressure atmosphere, achieves high-quality and high-safety connection of metal modules under microgravity environments, providing core technical support for the on-orbit construction of space stations.

The present invention provides a fusion splicer that allows for end-face observation and enables fusion splicing using three electrode rods. [Solution] When the reflective member 23 is raised towards the space between the optical fibers 21, the shoulder portion 27 of the reflective member 23 comes into contact with the tapered portion 29, and the shielding member 25 is pushed down. That is, the shielding member 25 rotates and tilts around the rotation axis 31. Also, since the third electrode 7c is fixed to the shielding member 25, the third electrode 7c rotates along with the rotational movement of the shielding member 25. In this way, when the shielding member 25 opens, the third electrode 7c moves laterally together with the shielding member 25, and the top of the reflective member 23 is opened, thus preventing interference between the rising reflective member 23, the shielding member 25 and the third electrode 7c.

This invention discloses a wind- and sand-resistant fiber optic fusion splicing protection device for desert areas, relating to the field of fiber optic fusion splicing technology. It includes a protective cover and a fusion splicer disposed inside the protective cover. An installation unit is provided on the upper side of the protective cover, and sealing units are provided on the left and right sides of the protective cover. Placement slots are provided on both sides of the protective cover, and support blocks are fixedly connected to both sides of the protective cover. The installation unit includes a cover plate disposed on the upper side of the protective cover, and the sealing unit includes multiple sets of guide plates. This wind- and sand-resistant fiber optic fusion splicing protection device for desert areas, by providing a protective cover, a fusion splicer, and placement slots, facilitates the placement of the fusion splicer within the protective cover. By placing the cover plate on the protective cover, the sealing plates on both sides seal the placement slots, effectively sealing and protecting the fusion splicer and preventing external wind and sand from entering the fusion splicer during splicing, thus affecting the splicing effect.

The application discloses an optical fiber fusion splicer, and belongs to the technical field of optical fiber fusion splicing. The optical fiber fusion splicer comprises a machine box, a machine cover hingedly arranged above the machine box, a fusion groove arranged on the upper wall of the machine box, a fusion mechanism and a core adjusting mechanism arranged in the fusion groove, a plurality of guide sliding rods arranged on the upper wall of the core adjusting mechanism, an optical fiber clamping mechanism slidably connected to the guide sliding rods, a self-adjusting pushing assembly arranged in the machine box and used for driving the optical fiber clamping mechanism to vertically slide, a sliding cavity symmetrically and communicatively arranged on the two sides of the fusion groove, a protective cover arranged in the sliding cavity, the fusion mechanism arranged in the protective cover, a pushing driving assembly arranged in the machine box and used for driving the two protective covers to reversely move, a time-delay linkage assembly arranged between the connecting frame and the pushing driving assembly, and a negative pressure dust collecting assembly arranged in the protective cover. The optical fiber fusion splicer can effectively prevent dust from entering the discharge electrode, remove the dust, and guarantee the fusion quality.

The application discloses a kind of high-precision detection method and system of oil and gas pipeline accompanying fiber optical fading point, belong to the technical field of fiber detection and oil and gas pipeline operation and maintenance.For the problems such as low efficiency, poor precision and large amount of work of existing OTDR single detection method, the application adopts the method combining OTDR and DAS system: establish the ranging alignment function of OTDR and DAS;Through OTDR initial measurement of optical fading point, determine the DAS channel number after function conversion, and knock the ground for initial exploration;Knock the vertical position of the fiber vertically in the direction perpendicular to the pipeline;After fusion splicing of the fiber, knock longitudinally, and determine the accurate point when the energy group channel number jumps.This application improves the detection accuracy from 10m to within 2m, increases the accuracy by 80%, and reduces the invalid excavation area by 90%.

This invention discloses an optical fiber propulsion mechanism for optical fiber fusion splicing, relating to the technical field of optical fiber fusion splicing devices. It includes an optical fiber fusion splicer body and an outer shell protecting internal components. An electrode rod is housed within the outer shell, with a set of bases on each side of the electrode rod. A clamping mechanism on the platform adaptively fixes the insulation layer of the optical fiber and drives the optical fiber towards the electrode rod. The clamping mechanism includes a shaped frame that moves freely in the horizontal direction, with clamping components for fixing the optical fiber on the shaped frame. This invention, by setting the clamping mechanism, achieves rapid coarse and precise adjustment of the optical fiber position. Driven by the shaped frame components, the shaped frame can quickly push the optical fiber towards the electrode rod, completing the coarse adjustment process. Subsequently, through fine adjustment using a first electric push rod, the optical fiber is precisely adjusted to the set splicing position. This combination of coarse and fine adjustment significantly improves the efficiency of optical fiber fusion splicing.

A fusion splicing method according to one embodiment comprises: a step for aligning a first multicore fiber (F1) and a second multicore fiber (F2); a step for calculating an axial deviation amount (d) from information obtained by observing respective end surfaces (E) of the first multicore fiber (F1) and the second multicore fiber (F2); a step for calculating an angular deviation amount (θ) from information obtained by observing the first multicore fiber (F1) and the second multicore fiber (F2) from the sides of the first multicore fiber (F1) and the second multicore fiber (F2); and a step for calculating an estimated loss in fusion splicing of the first multicore fiber (F1) and the second multicore fiber (F2) from the axial deviation amount (d) and the angular deviation amount (θ).

The application belongs to the technical field and particularly relates to a long-mark-length fiber grating concrete carbonation monitoring sensor and a monitoring method. The sensor comprises a first interface, a PH sensor, an optical fiber, a strain sensor and a second interface. The PH sensor and the strain sensor are connected in series through the optical fiber or fusion splicing and are placed side by side at the same position of the concrete structure. The sensor can realize in-situ real-time monitoring of the carbonation degree of the concrete and "prior" prediction of the possibility of the occurrence of the steel bar corrosion through the measurement of the pH value of the concrete. The double-sensor integrated design of the synchronous measurement of the pH value and the strain can simultaneously obtain the strain and the pH value changes caused by the external load. The long-mark-length structure design can increase the contact surface of the pH sensitive hydrogel and the concrete, and the sleeve can ensure that the FBG is uniformly stressed in the mark length and effectively reduces the influence of the local accidental error.