24 results about "Bare fiber" patented technology

A colored optical fiber comprises a bare optical fiber, a primary layer formed of a first ultraviolet curing resin covering the bare optical fiber, and a secondary layer formed of a second ultraviolet curing resin covering the primary layer, wherein a Young's modulus of the primary layer is smaller than 70% with respect to a saturated Young's modulus of the primary layer, and wherein the saturated Young's modulus of the primary layer is smaller than or equal to 0.85 MPa.

1. Name of this product design: Winding Fiber Optic Storage Tray. 2. Purpose of this design: For winding and storing bare optical fibers, armored optical fibers, and other optical fibers. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

A cladding light stripper and a manufacturing method therefor, and an optical fiber laser, relating to the technical field of cladding light strippers. The cladding light stripper (100) comprises a double-clad optical fiber assembly (1) and triple-clad bare fibers (2); the double-clad optical fiber assembly (1) comprises two sections of double-clad optical fibers (11), each double-clad optical fiber (11) comprises a double-clad bare fiber (111) and a coating layer (112) which are concentrically arranged in sequence from inside to outside, and the double-clad bare fiber (111) extends out of the coating layer (112); there are multiple sections of triple-clad bare fibers (2), the multiple sections of triple-clad bare fibers (2) are sequentially welded to form a main body (3), the two sections of double-clad optical fibers (11) are respectively welded to two ends of the main body (3) by means of the double-clad bare fibers (111), and a stripper is formed on the main body (3). The cladding light stripper (100) can be constructed from multiple sections of triple-clad bare fibers (2) while preserving the original advantages of the double-clad optical fibers (11) and the triple-clad bare fibers (2); this design can avoid the formation of local hot spots in any section of triple-clad bare fiber (2) due to prolonged high-power operation, thereby significantly improving the cladding light stripping ability of the cladding light stripper (100).

This application discloses a method for enhancing the quality of bare fiber sensing signals in vehicle-mounted vibration environments. It relates to the field of fiber optic sensing signal quality enhancement, and utilizes a multi-axis inertial measurement unit and a vibration sensing network to construct a spatiotemporal feature tensor, enabling three-dimensional dynamic perception of the vibration environment. Filtering parameters and gain are dynamically configured based on vibration characteristics to ensure stable signal acquisition under strong vibration conditions. A deep feature decoupling network, combined with vibration environment information, effectively separates noise from the target signal, improving the signal-to-noise ratio. A dynamic compensation module, based on a physical heuristic model, corrects vibration-induced transmission distortion from three dimensions: polarization state, birefringence, and microbending loss, ensuring the physical integrity of the signal. A closed-loop collaborative control mechanism dynamically optimizes the parameters of each module through real-time signal quality feedback, forming an adaptive optimization closed loop. Through spatiotemporal multi-dimensional collaborative processing, high-quality and robust enhancement of bare fiber sensing signals in vehicle-mounted vibration environments is achieved.

This utility model relates to a bare optical fiber polishing fixture, including a polishing jig and a positioning jig. The polishing jig includes a positioning plate, an upper pressure plate, and a lower base plate stacked sequentially. The positioning plate has an optical fiber positioning groove extending through its front and rear ends. The optical fiber positioning groove is formed by an array of bare fiber grooves for accommodating bare optical fibers. The upper pressure plate is located at the upper part of one end of the positioning plate and is attached to the positioning plate to clamp the bare optical fiber. The lower base plate is located at the lower part of one end of the positioning plate and is attached to the positioning plate to support the positioning plate. The polishing jig is placed on the positioning jig to position the length of the bare optical fiber extending out of the polishing jig. This utility model, through the cooperation of the polishing jig and the positioning jig, not only enables multiple optical fibers to be fixed simultaneously in the polishing jig for overall clamping, improving clamping stability, but also reduces the risk of easy breakage of the end of a single optical fiber due to friction from the polishing paper, thereby improving the polishing efficiency of bare optical fibers.

The application discloses a method for inhibiting stimulated Brillouin scattering of a single-frequency fiber laser gain fiber, which comprises the following steps: stripping the coating layer of the gain fiber to obtain a bare fiber, wiping the bare fiber clean, and then positioning the two ends of the bare fiber by clamping the two ends of the bare fiber with a fiber clamp; heating the bare fiber by moving step by step according to a fixed length of moving interval from one end to the other end along the axial direction of the bare fiber; and increasing one or both of the temperature and the time of heating step by step after each movement, or decreasing one or both of the temperature and the time of heating step by step. The method for inhibiting stimulated Brillouin scattering of a single-frequency fiber laser gain fiber provided by the application can adjust the gradient distribution of the doped ions in the gain fiber by controlling the heating temperature, the heating time and the heating position direction parameters in a heat diffusion manner, and can broaden the Brillouin gain spectrum in the gain fiber while keeping the highest temperature of the gain fiber basically unchanged.

This invention discloses an integrated method and tooling for precise fiber stripping and online strength testing of optical fibers, relating to the field of optical fiber device manufacturing and testing technology. The method includes: fixing the optical fiber to a dedicated tooling; pushing the tooling so that its first limiting part abuts against the stripping fixture of a fiber stripping machine, mechanically determining the stripping length and performing the stripping; transferring the tooling to an integrated testing device without disassembly, applying standardized bending stress to the bare fiber; and determining the quality based on the fracture condition. The tooling includes a base with a first limiting part and a mounting groove, an assembly block with a groove, and a clamping block with a second limiting part. The arc-shaped surfaces of the two limiting parts restrict the bending amount. This invention fundamentally eliminates the influence of equipment accuracy on the stripping length through mechanical limiting, achieves online non-destructive full inspection of micro-cracks through standardized bending stress, and completes two processes in a single clamping operation through the tooling, significantly improving the accuracy, efficiency, and reliability of optical fiber connector manufacturing.

The invention provides a coating device of a high-temperature-resistant metal coating optical fiber and a using method, and relates to the technical field of optical fiber coating devices.The coating device comprises a coating mechanism, the coating mechanism comprises a mold, the mold comprises a mold barrel, a coating cavity and a mold core, the coating cavity is arranged in the mold barrel, and the mold core is arranged in the coating cavity; the mold core comprises a mold core cavity and a feeding hole, the mold core cavity is formed in the mold core, the feeding hole is formed between the mold core cavity and the coating cavity and enables the mold core cavity and the coating cavity to be communicated, the mold core cavity is cylindrical, and the height of the mold core cavity can be adjusted; the mold core further comprises an upper fiber penetrating hole and a lower fiber penetrating hole, the lower fiber penetrating hole is formed under the upper fiber penetrating hole, the upper fiber penetrating hole and the lower fiber penetrating hole are both communicated with the mold core cavity, and the coating thickness and quality can be controlled by adjusting the height of the mold core cavity; the position of the lower bottom surface of the mold core cavity is adjusted, the thickness of the metal coating coated outside the bare fiber can be accurately controlled, and the lower the position of the lower bottom surface of the mold core cavity is, the smaller the thickness of the metal coating of the coated optical fiber is; bubbles in the metal solution can be controlled by adjusting the position of the upper bottom surface of the mold core cavity; the higher the position of the upper bottom surface of the mold core cavity is, the smaller the probability that bubbles appear in the metal solution in the mold core cavity is, the higher the uniformity of the metal coating of the produced optical fiber is, and the better the quality is.

An optical connector includes a ferrule having a fiber hole, a plurality of optical fibers that are inserted into the fiber hole, and an adhesive that fixes the plurality of optical fibers to the ferrule. Each of the plurality of optical fibers has a bare fiber and a coating that partially covers the bare fiber, a portion of the bare fiber that is exposed from the coating has a small diameter portion that is located inside the fiber hole and a large diameter portion that has a larger diameter than the small diameter portion, an injection hole for injecting the adhesive is not formed in a region of the ferrule orthogonal to a longitudinal direction of the fiber hole from the small diameter portion, and an injection hole is formed in a region of the ferrule orthogonal to the longitudinal direction from the large diameter portion.

The invention provides special wire drawing equipment and method for preparing a fiber bragg grating. The equipment comprises a wire drawing furnace and an ultraviolet exposure system which are sequentially arranged from high to low, melting the optical fiber preform into a bare fiber by a fiber drawing furnace, and inscribing a grating on the bare fiber by an ultraviolet exposure system; the sensibilization system is arranged between the wire drawing furnace and the ultraviolet exposure system; the sensibilization system comprises an oxyhydrogen blast burner used for forming oxyhydrogen flames, and the formed oxyhydrogen flames are aligned with the grating inscribing area in the bare fiber for sensibilization treatment. According to the invention, the sensitization system is additionally arranged between the fiber drawing furnace and the grating inscribing system, hydrogen and oxygen are combusted to form oxyhydrogen flame, and the bare fiber which is just fused into the fiber is subjected to sensitization treatment, so that the photosensitivity of the grating inscribing area is improved, and the preparation of the fiber grating with high reflectivity is further realized.

The present disclosure relates generally to a fiber holder for holding optical fibers. The fiber holder can include a main holder body having a length that extends between first and second ends of the main holder body, a width that extends between first and second side walls of the main holder body, and a height that extends between top and bottom sides of the main holder body. The main holder body can define a plurality of fiber positioning grooves that extend along the length of the main holder body and spaced across the width of the main holder body. The main holder body also includes a fiber engagement structure having a fiber engagement surface. The fiber engagement structure can be aligned with an open region that interrupts the plurality of fiber positioning grooves. The fiber engagement structure can extend through the height of the main holder body from the top side to the fiber engagement surface.

The present disclosure relates generally to a bare fiber connection system that includes first and second multi-fiber fiber optic connectors that have a retractable shroud with a pivotal locking member mounted thereon. The pivotal locking member can be configured to lock the retractable shroud in an extended position. The pivotal locking member can be pivoted about a pivot point while remaining attached to the retractable shroud to unlock the retractable shroud such that the retractable shroud can move to a retracted position.

This invention discloses a method for preparing a fully deglassed, low-resistance drift cobalt-based amorphous alloy bare wire. The method involves glass-coating a cobalt-based amorphous alloy master alloy, followed by glass removal to obtain an initial bare wire; this wire is then subjected to multiple drawing passes, achieving a total true strain of 0.02–0.12 and a single-pass true strain ≤0.035, satisfying the required parameters. F 1 / F b =0.02~0.10; sizing bare yarn is subjected to two-stage annealing under an oxygen content of 10~120 ppm. T 1. Satisfy T x1 -130℃≤ T 1≤ T x1 -90 ℃ T 2. Satisfy T x1 -70℃≤ T 2≤ T x1 -35 ℃ T x1 The first crystallization initiation temperature was determined using differential scanning calorimetry, and conditions were applied in the low-temperature and high-temperature sections respectively, satisfying... F 2 / F b =0.01~0.10、 F 3 / F b Axial micro-tension of 0.01–0.10; surface smoothing treatment and low-temperature passivation treatment. This method solves the problems of difficulty in maintaining the amorphous state of fully devitrified bare fibers and long-term impedance drift through the synergistic effect of minimal true strain drawing, normalized two-stage annealing and micro-oxygen surface stabilization.

This invention proposes a special fiber drawing equipment and method for fabricating fiber gratings. The equipment includes a fiber drawing furnace and an ultraviolet exposure system arranged sequentially from high to low. An optical fiber preform is melted into bare fiber in the drawing furnace, and the ultraviolet exposure system inscribes the grating onto the bare fiber. A sensitization system is also provided, positioned between the drawing furnace and the ultraviolet exposure system. The sensitization system includes an oxyhydrogen torch for forming an oxyhydrogen flame, which is directed at the grating inscription area in the bare fiber to enhance its sensitivity. This invention, by adding a sensitization system between the drawing furnace and the grating inscription system, utilizes the combustion of hydrogen and oxygen to form an oxyhydrogen flame to sensitize the freshly melted bare fiber, thereby improving the photosensitivity of the grating inscription area and achieving the fabrication of highly reflective fiber gratings.

The application relates to the technical field of SN connector production, and discloses a grinding device applied to an SN connector, which comprises two independently arranged grinding discs; the grinding disc comprises a disc body and a plurality of limiting pieces, the plurality of limiting pieces are uniformly arranged on the disc body at intervals, and the bottom of each limiting piece is provided with a through hole; the limiting pieces are used for fixing the SN connector, so that the to-be-ground fiber stubs pass through the through holes. The first fiber stub and the second fiber stub of the completed assembled connector are respectively ground through the grinding device, the assembly production efficiency of the connector is effectively improved, the foolproof effect is good, the whole production process does not need to be repeatedly disassembled, the risk of bare optical fiber breakage is avoided, and the product production yield and reliability are effectively improved.

A method and system for assembly and calibration of polarization-maintaining fibers in co-packaged optics is provided, the method includes the following steps: using a substrate with a plurality of V-shaped grooves arranged side by side, and placing a bare fiber segment of a polarization-maintaining fiber in each V-shaped groove; using a low-frequency vibrator to allow the bare fiber segment to move and rotate along the V-shaped groove, and controlling the length of the bare fiber segment extending out of the V-shaped groove; using an optical inspection lens set to monitor the continuous rotation, when the end-face of the bare fiber segment being rotated to a set angle, operating a first pressing assembly to press the bare fiber segment thereon; continuing to repeat the above steps until all the polarization-maintaining fibers being at the set angle, and then operating a second pressing assembly to press on the cladding segments.

The invention relates to a method for manufacturing a polarization maintaining optical fiber array for a CPO silicon optical engine. A substrate is provided with a platform with a plurality of V-shaped grooves and a supporting block; placing a bare optical fiber of a polarization maintaining optical fiber in one V-shaped groove, covering a temporary cover plate on the platform so as to press the bare optical fiber in the V-shaped groove, adjusting the polarization maintaining optical fiber so as to enable an included angle between a panda eye-fiber core-panda eye of the polarization maintaining optical fiber and the horizontal plane to be smaller than 3 degrees, dispensing glue, and bonding and fixing the bare optical fiber and the supporting block; the operation is repeated, and all the polarization maintaining optical fibers are adjusted and fixed; replacing a formal cover plate, dispensing soft glue to enable the cover plate, the polarization maintaining optical fiber and the substrate to be bonded and fixed, and dispensing hard glue to enable the cover plate, the bare optical fiber and the substrate to be bonded and fixed; cutting off the supporting block and the bare optical fiber on the supporting block to obtain a semi-finished polarization-maintaining optical fiber array; and grinding the end face of the semi-finished polarization-maintaining optical fiber array to obtain a finished polarization-maintaining optical fiber array. The method has the beneficial effects that high quality can be ensured, and the yield is greater than 99%.

The utility model discloses an MPO optical fiber patch cord arrangement mechanism, which comprises a base, one end of the base is hinged with a lifting arm, and one end of the lifting arm is provided with a notch capable of longitudinally arranging bare optical fibers in parallel. One side of the lifting arm is provided with a pressing plate capable of compacting the bare optical fiber arranged in the notch and a moving structure for driving the pressing plate to move, the other side of the lifting arm is provided with a fixing structure capable of fixing an optical fiber cable, and the upper surface of the base is provided with a leveling structure for leveling the bare optical fiber; the fiber arranging machine is more convenient to use due to the integrated lifting moving structure and the fixed structure, the continuity of fiber arranging operation is improved, the fiber arranging efficiency can be improved, the fillet arrangement at the top of the notch is matched with the width allowing only a single bare fiber to enter, the fiber arranging difficulty can be reduced, and the fiber arranging efficiency is improved. Operators can easily clamp optical fibers into the notches one by one, and the optical fibers are arranged in parallel in a single row after entering the notches.

The present disclosure relates generally to a bare fiber connection system that includes first and second multi-fiber fiber optic connectors that have a retractable shroud with a pivotal locking member mounted thereon. The pivotal locking member can be configured to lock the retractable shroud in an extended position. The pivotal locking member can be pivoted about a pivot point while remaining attached to the retractable shroud to unlock the retractable shroud such that the retractable shroud can move to a retracted position.

The application relates to a ring spot combiner processing method and belongs to the technical field of ring spot combiners. The ring spot combiner processing method comprises the following steps: removing a coating layer of a preset number of optical fiber end portions to form bare fibers, and the bare fiber lengths of the optical fibers are sequentially increased; a fiber with a median bare fiber length is inserted into a central hole of a multi-hole tube with a preset number of hole positions, and the remaining optical fibers are respectively inserted into the remaining holes of the multi-hole tube; a volatile liquid is dropped on the bare fibers to gather the bare fibers of all the optical fibers into a bare fiber bundle, and the optical fibers are fixed at preset positions near the interface of the coating layer to form fixed parts; a sleeve is sleeved on the bare fiber bundle, and the residual volatile liquid on the bare fiber bundle is removed; the sleeve and the bare fibers are fixed at the sleeve opening of the sleeve by using low-refraction glue, and the sleeve and the bare fibers inside the sleeve are subjected to fusion tapering. Therefore, the ring spot combiner processing method saves operation time, reduces operation difficulty, and improves production efficiency.

To provide an optical fiber carrying resin molding capable of further improving measurement accuracy.SOLUTION: The optical fiber-supporting resin-molded article includes a long core 11, one or more optical fibers 12 extending in the direction of the axis O1 of the core 11, and a fixing member 112 for fixing the optical fibers 12 to the core 11, wherein the optical fibers 12 each include a bare fiber and an optical-fiber coating layer covering the peripheral surface of the bare fiber, and the fixing member 112 has a melting temperature lower than the melting temperatures of the core 11 and the optical-fiber coating layer.SELECTED DRAWING: Figure 4

The application discloses an ultrasonic excitation optical fiber node, which comprises two bare optical fiber segments and two spherical bare optical fiber intersection segments, one bare optical fiber segment is integrally connected with the spherical surface of one side of the two spherical bare optical fiber intersection segments, and the other bare optical fiber segment is integrally connected with the spherical surface of the other side of the two spherical bare optical fiber intersection segments, the two spherical radii of the two spherical bare optical fiber intersection segments are equal, and the common chord d of the two spherical bare optical fiber intersection segments is determined by the spherical radius r of the two spherical bare optical fiber intersection segments and the difference l between the spherical radius r of the two spherical bare optical fiber intersection segments and the chord distance. The application can solve the problems that the piezoelectric ultrasonic transducer is susceptible to electromagnetic interference, has a relatively large volume and is difficult to detect a non-planar structure, and effectively widens the detection range of the optical fiber ultrasonic transducer.

The invention relates to an optical fiber helium-free cooling wiredrawing coating method and device, bare optical fibers are drawn out from an optical fiber wiredrawing furnace, are cooled by air and then enter an optical fiber coater to be subjected to layered coating treatment by resin coating, and the layered coating treatment comprises at least two times of inner coating layer coating and at least one time of outer coating layer coating. The inner coating layer is coated by adopting an inner coating layer resin coating, the outer coating layer is coated by adopting an outer coating layer resin coating, the bare optical fiber enters an ultraviolet curing device for curing treatment after layered coating treatment, and the bare optical fiber is tightly coated with the inner coating layer and the outer coating layer with different elastic moduli after curing treatment. According to the invention, the surface temperature of the optical fiber is isolated by coating the surface of the bare optical fiber with the first inner coating layer, so that the subsequent coating of the inner and outer resin coatings is not or less affected by the temperature of the optical fiber, and the coating of the inner and outer coating layers of the optical fiber is completed; helium is not needed for cooling, so that the wire drawing processing cost is reduced, and the working procedures and the device are simplified.

The application discloses a kind of high tension online wire drawing device, system, method and product of rotating polarization maintaining optical fiber, and the coating resin in conical dish is formed into vortex by paddle, opposite circumferential friction force is applied to bare optical fiber passing through it with the direction of rotation, to overcome the torsion of rotating polarization maintaining optical fiber when drawing, so that rotating polarization maintaining optical fiber can be drawn under greater drawing tension, thereby solve the technical problems such as poor strength, short length, higher attenuation caused by rotating polarization maintaining optical fiber drawn under low tension.The system provided by the application uses the above device to replace the coating cup of the existing drawing tower, without the need to additionally increase the mechanism, and is suitable for modification on the existing rotary drawing system.The optical fiber prepared by using high tension drawing process has lower attenuation, higher strength, longer length, more accurate rotating pitch distribution, and better appearance consistency and environmental reliability.