CN108793725B - Optical fiber torsion device - Google Patents
Optical fiber torsion device Download PDFInfo
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- CN108793725B CN108793725B CN201710282583.5A CN201710282583A CN108793725B CN 108793725 B CN108793725 B CN 108793725B CN 201710282583 A CN201710282583 A CN 201710282583A CN 108793725 B CN108793725 B CN 108793725B
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 159
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 6
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- 230000000994 depressogenic effect Effects 0.000 claims 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims 1
- 239000006185 dispersion Substances 0.000 abstract description 19
- 230000010287 polarization Effects 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 13
- 238000001816 cooling Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000012681 fiber drawing Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/03—Drawing means, e.g. drawing drums ; Traction or tensioning devices
Abstract
The invention discloses an optical fiber torsion device, and belongs to the technical field of optical fiber manufacturing. The optical fiber torsion device comprises a rotary disk, a first limiting piece and a second limiting piece which are symmetrically arranged on the upper side and the lower side of the rotary disk; the first limiting piece is provided with a first through hole for leading in the optical fiber, the second limiting piece is provided with a second through hole for leading out the optical fiber, the rotating disk is provided with at least one pair of third through holes which are symmetrical relative to the disk center of the rotating disk, and the optical fiber passes through one of the third through holes; the first through hole, the second through hole and the third through hole are all provided with smooth inner walls; the optical fiber torsion device is also provided with a driving component, and the optical fiber torsion device is driven by the driving component to rotate around the center of the rotating disk so as to twist the optical fiber. The optical fiber torsion device provided by the invention can reduce polarization mode dispersion, can avoid damaging the surface of the optical fiber, and has the advantages of simple structure and convenience in adjustment and maintenance.
Description
Technical Field
The invention relates to the technical field of optical fiber manufacturing, in particular to an optical fiber torsion device.
Background
Polarization mode dispersion refers to polarization dispersion in single mode fibers, PMD (Polarization Mode Dispersion) for short, which is dispersion caused by minor asymmetry in the fiber cross-section that causes two mutually perpendicular fundamental polarization modes to propagate at different speeds. If the polarization mode dispersion is large, waveform degradation occurs in the signal light transmitted through the optical fiber, and adjacent pulses are difficult to separate, which results in problems such as limited transmission capacity. Further, the minute asymmetry of the optical fiber cross section is mainly due to the fact that the cross-sectional shape of the optical fiber is an elliptical cross-section, and in the manufacturing of the optical fiber, it is actually difficult to achieve a complete right circular cross-sectional shape including the core portion of the optical fiber and the surrounding cladding portion of the optical fiber, regardless of the manufacturing method of the optical fiber base material and the method of spinning (drawing) the optical fiber base material to manufacture the bare optical fiber.
In the prior art, during the optical fiber drawing process, the optical fiber is twisted by a clamping method, so that the problem of large polarization mode dispersion caused by an elliptical section in the optical fiber forming process is solved, and the aim of stably controlling the polarization mode dispersion is fulfilled. However, whether the twisting device adopts double-wheel twisting or single-wheel twisting, the surface of the optical fiber is extruded to cause different degrees of surface damage, so that certain economic loss is brought; in addition, the twisting device is relatively complex and heavy, and is inconvenient to adjust and maintain.
Disclosure of Invention
In order to solve the problems in the prior art, the embodiment of the invention provides an optical fiber torsion device which can reduce polarization mode dispersion in the optical fiber drawing process, and simultaneously avoid surface damage caused by extrusion on the surface of an optical fiber. The technical scheme is as follows:
the embodiment of the invention provides an optical fiber twisting device, which comprises a rotating disc, a first limiting piece and a second limiting piece, wherein the first limiting piece and the second limiting piece are symmetrically arranged on the upper side and the lower side of the rotating disc;
the first limiting piece is provided with a first through hole for the optical fiber to be led in, the second limiting piece is provided with a second through hole for the optical fiber to be led out, the rotating disk is provided with at least one pair of third through holes which are symmetrical relative to the disk center of the rotating disk, and the optical fiber passes through one of the third through holes;
the first through hole, the second through hole and the third through hole are all provided with smooth inner walls;
the optical fiber torsion device is also provided with a driving assembly, and the rotating disc is driven by the driving assembly to rotate around the disc center of the rotating disc so as to twist the optical fiber.
Preferably, the optical fiber twisting device comprises a base frame with a hollow structure, and the rotating disk is erected on the top of the hollow structure;
the first through hole and the second through hole are on the same straight line with the center of the rotating disk;
and under the drive of the driving assembly, the rotating disc rotates around the center of the rotating disc along a clockwise direction or a counterclockwise direction or alternately rotates along a bidirectional direction relative to the base frame.
Preferably, the driving assembly includes a rotation shaft mounted on a hub of the rotating disk and a driving motor to which the rotation shaft is connected;
the centers of the first through hole, the second through hole and the third through hole are not on the same straight line;
the rotating disc is driven by the driving motor to alternately rotate along the two-way direction around the rotating shaft.
Further, an annular convex rib is arranged at the bottom of the rotary disk, and an annular groove corresponding to the annular convex rib is arranged on the upper surface of the base frame.
Further, a plurality of hemispherical grooves are formed in the upper surface of the base frame, concave portions corresponding to the hemispherical grooves are formed in the bottom of the rotating disc, balls are arranged in the hemispherical grooves, and the balls are in contact with the concave portions.
Preferably, the driving assembly includes a motor, a rotation shaft connected to the motor, and a driving gear installed on the rotation shaft;
the outer edge of the rotating disc is in a gear shape, and the rotating disc is meshed with the driving gear.
Preferably, a displacement limiting member is also fixedly arranged on the base frame, and the displacement limiting member is positioned above the edge of the rotating disk.
Preferably, the third through holes are a pair;
the rotating disc is provided with a strip-shaped gap, and if the strip-shaped gap passes through the disc center of the rotating disc, the distances from the two ends of the strip-shaped gap to the disc center of the rotating disc are equal;
two cylindrical parts symmetrical relative to the disk center of the rotating disk are clamped on the strip-shaped gap, and the two cylindrical parts are respectively provided with the third through holes.
Preferably, the third through holes are in a plurality of pairs;
and the hole centers of all the third through holes are positioned on the same straight line.
Preferably, the first through hole, the second through hole, and the third through hole have the same diameter.
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
the first limiting piece and the second limiting piece of the optical fiber torsion device are symmetrically arranged on the upper side and the lower side of the rotating disc, the first limiting piece is provided with a first through hole for leading in an optical fiber, the second limiting piece is provided with a second through hole for leading out the optical fiber, the rotating disc is provided with at least one pair of third through holes which are symmetrical relative to the center of the rotating disc, the optical fiber passes through one of the third through holes, and therefore after sequentially passing through the first through hole of the first limiting piece, one of the at least one pair of third through holes of the rotating disc and the second through hole of the second limiting piece, the optical fiber is driven by the driving component to rotate around the center of the rotating disc, so that the optical fiber is twisted, the problem of large polarization mode dispersion caused by an elliptical section in the optical fiber forming process is solved, and the aim of stably controlling polarization mode dispersion is fulfilled; meanwhile, the first through hole, the second through hole and the third through hole are all provided with smooth inner walls, so that the first through hole, the second through hole and the third through hole cannot extrude the surface of the optical fiber to cause surface damage in the process of twisting the optical fiber by the optical fiber twisting device; in addition, the optical fiber torsion device mainly comprises a first limiting piece provided with a first through hole, a second limiting piece provided with a second through hole, a rotating disc provided with a third through hole and a driving assembly for driving the rotating disc to rotate, so that the optical fiber torsion device has the characteristics of simple structure and convenience in adjustment and maintenance.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a fiber manufacturing system;
FIG. 2 is a schematic perspective view of an optical fiber twisting device according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of an optical fiber twisting device according to an embodiment of the present invention;
FIG. 4 is an enlarged partial schematic view of the circle A of FIG. 3;
FIG. 5 is another enlarged partial schematic view of circle A in FIG. 3;
FIG. 6 is a schematic view of a rotating disc according to an embodiment of the present invention;
FIG. 7 is a schematic view of a rotating disc according to an embodiment of the present invention;
fig. 8 is a schematic cross-sectional view of an optical fiber twisting device according to an embodiment of the present invention.
Corresponding part names indicated by numerals in the drawings:
1. a clamping device; 2. an optical fiber preform; 3. a melting furnace; 4. softening and forming area; 5. a primary cooling device; 6. a secondary cooling device; 7. a third stage cooling device; 8. a coating device; 9. a curing device; 10. an optical fiber twisting device; 11. a positioning wheel; 12. a wire winding device; 13. an optical fiber; 101. a base frame; 102. a first limiting member; 103. a second limiting piece; 104. a rotating disc; 105. a drive assembly; 106. a displacement limiting member; 1011. an annular groove; 1012. hemispherical grooves; 1013. a ball; 1021. a first through hole; 1031. a second through hole; 1041. a third through hole; 1042. annular convex ribs; 1043. a strip-shaped slit; 1044. a cylindrical member; 1051. a motor; 1052. a rotating shaft; 1053. a drive gear; 1054. a rotation shaft; 1055. and driving the motor.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The embodiment of the invention provides an optical fiber torsion device which can be applied to the manufacturing process of a low-polarization-mode dispersion optical fiber, so that the problem of large polarization mode dispersion caused by an elliptical cross section of the optical fiber is solved, and meanwhile, the surface damage caused by extrusion on the surface of the optical fiber is avoided.
Referring to fig. 1, fig. 1 is a schematic diagram of an optical fiber manufacturing system. The optical fiber manufacturing system manufactures an optical fiber by passing through a clamping device 1, a melting furnace 3, a softening and molding zone 4, a primary cooling device 5, a secondary cooling device 6, a tertiary cooling device 7, a coating device 8, a solidifying device 9, an optical fiber twisting device 10, a positioning wheel 11, and a take-up device 12, which are arranged in order along the drawing direction of the optical fiber. The optical fiber manufacturing system is characterized in that an optical fiber preform 2 is firstly fed into a melting furnace 3 through a clamping device 1, the axis of the drawn optical fiber is rotated while being heated in a softening and forming area 4, the optical fiber is gradually annealed through a primary cooling device 5, a secondary cooling device 6 and a tertiary cooling device 7, gradually cooled to 40-50 ℃, a bare silica glass body is coated with a resin protection layer through a coating device 8, the resin is solidified through a solidifying device 9 to form a coating layer so as to ensure the strength and the hardness of the optical fiber, the optical fiber is twisted through an optical fiber twisting device 10, and finally the optical fiber is wound on a special plate through a wire winding device 12 after passing through a positioning wheel 11, so that the optical fiber manufacturing process is completed.
Example 1
Referring to fig. 2, fig. 2 is a schematic perspective view of an optical fiber twisting device according to an embodiment of the present invention. The optical fiber twisting device 10 includes a base frame 101, a first stop 102, a second stop 103, a rotating disk 104, and a drive assembly 105.
Specifically, the base frame 101 has a hollow structure in a cylindrical shape, the rotating disc 104 is erected on the top of the hollow structure, and the first limiting piece 102 and the second limiting piece 103 are symmetrically arranged on the upper side and the lower side of the rotating disc 104; the distance between the first limiting piece 102, the second limiting piece 103 and the rotating disc 104 can be adjusted. The first limiting member 102 and the second limiting member 103 may be respectively fixed on a supporting structure (not shown), and the supporting structure may be fixed on the base frame 101.
The first limiting member 102 is provided with a first through hole 1021, the second limiting member 103 is provided with a second through hole 1031, the rotating disk 104 is provided with at least one pair of third through holes 1041 symmetrical relative to the disk center of the rotating disk 104, wherein the first through hole 1021 is used for guiding in the optical fiber 13, the second through hole 1031 is used for guiding out the optical fiber 13, and the third through holes 1041 are used for allowing the optical fiber 13 to pass through.
The first through hole 1021, the second through hole 1031, and the third through hole 1041 each have a smooth inner wall to ensure that the surface of the optical fiber is not damaged when the optical fiber is twisted. The cross sections of the inner walls of the first through hole 1021, the second through hole 1031 and the third through hole 1041 can be round or elliptical; wherein the first through hole 1021, the second through hole 1031 and the third through hole 1034 have the same diameter, the same diameter is set according to the diameter of the optical fiber, so that the optical fiber can pass through, and the optical fiber passing through the first through hole 1021, the second through hole 1031 and the third through hole 1034 can be twisted by the rotation of the rotating disk, in practical application, the diameters of the first through hole 1021, the second through hole 1031 and the third through hole 1034 can be set to be 2mm + -0.1 mm. Wherein the first through hole 1021, the second through hole 1031, and the third through hole 1034 have the same depth, the depth may be set to 5mm±0.5mm.
The rotating disk 104 is rotated relative to the base frame 101 about the center of the rotating disk 104 by the drive assembly 105, so that the optical fibers are twisted. The driving component 105 is fixedly disposed inside the base frame 101, and the driving component 105 contacts with the rotating disk 104 to control the rotating disk 104 to rotate around the center thereof, thereby driving the optical fiber passing through the third through hole 1041 on the rotating disk 104 to twist.
The first through hole 1021 and the second through hole 1031 are on the same straight line with the center of the rotating disk 104, in other words, the centers of the first through hole 1021 and the second through hole 1031 are on the central axis of the rotating disk 104, so when the optical fiber 13 sequentially passes through the first through hole 1021, the second through hole 1031 and the third through hole 1041, the optical fiber 13 forms a certain angle at the third through hole 1041 along the length direction, and the angle formed by the invention is not limited by the specific limitation of the angle by properly adjusting the distance between the first limiting member 102, the second limiting member 103 and the rotating disk 104, or changing the third through hole through which the optical fiber passes.
The rotary disk 104 rotates clockwise or counterclockwise or alternately in both directions about its center relative to the base frame 101 under the drive of the drive assembly 105. During the drawing process of the optical fiber, the optical fiber is provided with a certain tension, for example, the tension range is 3-5N, so that the optical fiber is ensured to twist through the rotation of the rotating disc. Since the driving unit 105 controls the rotating disk 104 to rotate only circumferentially, in a counterclockwise direction, or in a clockwise direction, or alternately to and fro within a certain rotation angle, the alternating to and fro rotation is clockwise and counterclockwise alternating rotation. Wherein, the rotation direction and rotation angle can be determined by the torsion parameters set by an operator on a control panel connected with the driving component 105, and the torsion parameters are set to ensure that the optical fiber twists 1-35 circles per meter in one rotation period, so as to realize that the polarization mode dispersion coefficient of the optical fiber is not more than 0.04ps/km 1/2 。
Further, referring to fig. 3 and 4, fig. 3 is a schematic cross-sectional structure of an optical fiber twisting device according to an embodiment of the present invention, fig. 4 is a partially enlarged schematic view of a circled a in fig. 3, a bottom of a rotating disc 104 is provided with an annular rib 1042, and an upper surface of a base frame 101 is provided with an annular groove 1011 corresponding to the annular rib 1042. The center of the annular groove is disposed on the vertical center line of the hollow structure of the base frame 101, when the rotating disc 104 rotates, the rotating disc 104 rotates in the annular track formed by the annular groove through the cooperation of the annular ribs 1042 and the annular groove 1011, in practical application, the surfaces of the annular ribs 1042 and the annular groove 1011 can be set to be smooth surfaces, so that small friction force exists between the annular ribs 1042 and the annular groove 1011, and the rotating disc 104 can smoothly rotate relative to the base frame 101.
It should be noted that, the structure between the bottom of the rotating disc 104 and the base frame 101 is not limited to the above structure, in practical application, an annular groove may be further provided at the bottom of the rotating disc 104, and an annular rib corresponding to the annular groove may be provided on the surface of the base frame 101, so long as the rotating disc 104 can rotate around its center relative to the base frame 101 under the driving of the driving assembly 105, which is not particularly limited in the embodiment of the present invention.
In another implementation manner of the embodiment of the present invention, referring to fig. 5, fig. 5 is another enlarged partial schematic view of the circle a in fig. 3, a plurality of hemispherical grooves 1012 are provided on the upper surface of the base frame 101, a recess (not labeled) corresponding to the hemispherical grooves 1012 is provided at the bottom of the rotating disc 104, balls 1013 are provided in the hemispherical grooves 1012, and the balls 1013 are in contact with the recess. Wherein, the hemispherical grooves 1012 are uniformly distributed on the surface of the base frame 101 opposite to the rotating disk 104, and form a plurality of annular structures with the center of the rotating disk 104 as the center.
In this embodiment, the balls 1013 at the bottom of the rotating disc 104 roll in the hemispherical grooves 1012 of the base frame 101 under the driving of the driving assembly 105, and the balls 1013 contact with the concave portions of the rotating disc 104, so that the rotating disc 104 can rotate smoothly around its center relative to the base frame 101.
Further, referring to fig. 3, the driving assembly 105 includes a motor 1051, a rotation shaft 1052 connected to the motor 1051, and a driving gear 1053 mounted on the rotation shaft 1052; the outer edge of the rotary disk 104 is gear-shaped, and the rotary disk 104 is meshed with a drive gear 1053.
Under the operation of the motor 1051, the rotating shaft 1052 drives the driving gear 1053 to rotate according to the set parameters, and the driving gear 1053 is meshed with the outer peripheral gear teeth of the rotating disc 104, so as to drive the rotating disc 104 to rotate, so that the optical fiber passing through one of the third through holes 1041 of the rotating disc 104 is twisted, and further the vibration mechanical wave generated by the twisting is transmitted to a softening area of the optical fiber drawing formation along the optical fiber, and periodically rotates, so that the out-of-roundness of the cladding of the optical fiber is improved, and the effect of reducing polarization mode dispersion in the optical fiber production is achieved.
It should be noted that, in other embodiments, the driving assembly may be configured in other driving structures, for example, a belt driving structure is configured in the driving assembly, and the specific structure of the driving assembly is not limited in the embodiment of the present invention.
Further, referring to fig. 2 and 3, a displacement limiting member 106 is further fixedly disposed on the base frame 101, and the displacement limiting member 106 is located above an edge of the rotating disc 104, where the displacement limiting member 106 is in a strip shape and is used to limit the upward movement of the rotating disc 104 when the rotating disc 104 rotates. Preferably, the displacement limiting members 106 are three, and the rotation stability of the rotating disc 104 is further ensured while the upward movement of the rotating disc 104 is limited.
It should be noted that, the structure and the number of the displacement limiting members 106 are not limited to the above-mentioned arrangement, and in practical application, the displacement limiting members 106 may be configured as annular displacement limiting members with the center of the rotating disk 104 as the center, where the annular displacement limiting members are located above the edge of the rotating disk, and the structure and the number of the displacement limiting members 106 are not limited specifically in the embodiment of the present invention.
Further, referring to fig. 6, fig. 6 is a schematic structural diagram of a rotating disc according to an embodiment of the present invention, and a pair of third through holes 1041 are provided; the rotating disc 104 is provided with a strip-shaped gap 1043, the strip-shaped gap 1043 passes through the center of the rotating disc 104, and the distances from the two ends of the strip-shaped gap 1043 to the center of the rotating disc 104 are equal; two cylindrical parts 1044 symmetrical relative to the center of the rotary disk 104 are respectively clamped on the strip-shaped gap 1043, and the two cylindrical parts 1044 are respectively provided with a third through hole 1041, wherein the distance from the two cylindrical parts 1044 to the center of the rotary disk 104 can be adjusted in practical application, and the positions of the two cylindrical parts 1044 are fixed on the strip-shaped gap 1043 in a clamping manner after the adjustment, so that the stability of the optical fiber twisting after passing through the third through hole 1041 is ensured.
In another implementation of this embodiment, the third through holes 1041 are in multiple pairs; the centers of all the third through holes 1041 are located on the same straight line. Referring to fig. 7, fig. 7 is a schematic structural diagram of a rotary disk according to another embodiment of the present invention, two pairs of third through holes 1041 are provided on the rotary disk 104, and the centers of all the third through holes 1041 of the two pairs are located on the same straight line, and the third through holes 1041 are provided on the rotary disk 104 in pairs, so that the rotation stability of the rotary disk 104 is ensured.
In other implementations of the embodiments of the present invention, all the centers of the pairs of third through holes may not be all aligned.
According to the optical fiber torsion device provided by the embodiment of the invention, the first limiting piece and the second limiting piece of the optical fiber torsion device are symmetrically arranged on the upper side and the lower side of the rotating disk, the first limiting piece is provided with the first through hole for leading in the optical fiber, the second limiting piece is provided with the second through hole for leading out the optical fiber, the rotating disk is provided with at least one pair of third through holes which are symmetrical relative to the disk center of the rotating disk, and the optical fiber passes through one of the third through holes, so that after sequentially passing through the first through hole of the first limiting piece, one of the at least one pair of third through holes of the rotating disk and the second through hole of the second limiting piece, the optical fiber is rotationally coiled around the disk center by the driving of the driving component so as to twist the optical fiber, and the problem of large polarization mode dispersion caused by an elliptical section in the optical fiber forming process is solved, and the purpose of stably controlling polarization mode dispersion is achieved; meanwhile, the first through hole, the second through hole and the third through hole are all provided with smooth inner walls, so that the first through hole, the second through hole and the third through hole cannot extrude the surface of the optical fiber to cause surface damage in the process of twisting the optical fiber by the optical fiber twisting device; in addition, the optical fiber torsion device mainly comprises a first limiting piece provided with a first through hole, a second limiting piece provided with a second through hole, a rotating disc provided with a third through hole and a driving assembly for driving the rotating disc to rotate, so that the optical fiber torsion device has the characteristics of simple structure and convenience in adjustment and maintenance.
Example two
Referring to fig. 8, fig. 8 is a schematic cross-sectional view of an optical fiber twisting device according to an embodiment of the present invention. The optical fiber twisting device comprises an optical fiber twisting device 10 comprising a first stop 102, a second stop 103, a rotating disc 104 and a drive assembly 105.
Specifically, the first limiting piece 102 and the second limiting piece 103 are symmetrically arranged on the upper side and the lower side of the edge of the rotating disc 104; the distance between the first limiting piece 102, the second limiting piece 103 and the rotating disc 104 can be adjusted. The first limiting member 102 and the second limiting member 103 may be fixed on a supporting structure (not shown) respectively.
The first limiting member 102 is provided with a first through hole 1021 for the optical fiber 13 to be introduced, the second limiting member 103 is provided with a second through hole 1031 for the optical fiber 13 to be introduced, the rotating disk 104 is provided with at least one pair of third through holes 1041 symmetrical relative to the center of the rotating disk, and the optical fiber 13 passes through one of the third through holes 1041..
The first through hole 1021, the second through hole 1031, and the third through hole 1041 each have a smooth inner wall to ensure that the surface of the optical fiber is not damaged when the optical fiber is twisted. The cross sections of the inner walls of the first through hole 1021, the second through hole 1031 and the third through hole 1041 can be round or elliptical; wherein the first through hole 1021, the second through hole 1031 and the third through hole 1041 have the same diameter, which is set according to the diameter of the optical fiber so as to enable the optical fiber to pass therethrough, and simultaneously the optical fiber passing through the first through hole 1021, the second through hole 1031 and the third through hole 1041 can be twisted by the rotation of the rotating disk, in practical application, the diameters of the first through hole 1021, the second through hole 1031 and the third through hole 1041 may be set to 2mm±0.1mm. Wherein the first through hole 1021, the second through hole 1031, and the third through hole 1041 have the same depth, the depth may be set to 5mm±0.5mm.
The optical fiber twisting device is further provided with a driving assembly 105, and the rotating disk 104 rotates around the center of the rotating disk 104 under the driving of the driving assembly 105 so as to twist the optical fiber 13.
Wherein the driving assembly 105 includes a rotation shaft 1054 and a driving motor 1055, the rotation shaft 1054 is mounted on a hub of the rotation disk 104, and the rotation shaft 1054 is connected to the driving motor 1055.
The centers of the first through hole 1021, the second through hole 1031 and the third through hole 1041 are not on the same line, and the third through hole 1041 is the third through hole closest to the first through hole 1021 and the second through hole 1031 among all the third through holes on the rotating disk 104. When the optical fiber 13 sequentially passes through the first through hole 1021, the second through hole 1031 and the third through hole 1041, the optical fiber 13 forms a certain angle at the third through hole 1041 along the length direction thereof, and the angle formed by the present invention is not limited by properly adjusting the distance between the first limiting member 102, the second limiting member 103 and the rotating disk 104, or changing the third through hole through which the optical fiber passes, so that the angle is limited to the range of 120 degrees to 150 degrees.
The rotary disk 104 is alternately rotated in a bi-directional direction about the rotary shaft 1054 by the driving motor 1055, and the bi-directional alternating rotation angle ranges from-90 ° to +90°. During the drawing process of the optical fiber, the optical fiber is provided with a certain tension, for example, the tension range is 3-5N, so that the optical fiber is ensured to twist through the rotation of the rotating disc. The angle of rotation may be defined by a torsion parameter set by the operator on a control panel connected to the drive assembly 105 to ensure that the optical fiber does not wind around the rotating disk 104.
According to the optical fiber torsion device provided by the embodiment of the invention, the first limiting piece and the second limiting piece of the optical fiber torsion device are symmetrically arranged on the upper side and the lower side of the rotating disk, the first limiting piece is provided with the first through hole for leading in the optical fiber, the second limiting piece is provided with the second through hole for leading out the optical fiber, the rotating disk is provided with at least one pair of third through holes which are symmetrical relative to the disk center of the rotating disk, and the optical fiber passes through one of the third through holes, so that after sequentially passing through the first through hole of the first limiting piece, one of the at least one pair of third through holes of the rotating disk and the second through hole of the second limiting piece, the optical fiber is rotationally coiled around the disk center by the driving of the driving component so as to twist the optical fiber, and the problem of large polarization mode dispersion caused by an elliptical section in the optical fiber forming process is solved, and the purpose of stably controlling polarization mode dispersion is achieved; meanwhile, the first through hole, the second through hole and the third through hole are all provided with smooth inner walls, so that the first through hole, the second through hole and the third through hole cannot extrude the surface of the optical fiber to cause surface damage in the process of twisting the optical fiber by the optical fiber twisting device; in addition, the optical fiber torsion device mainly comprises a first limiting piece provided with a first through hole, a second limiting piece provided with a second through hole, a rotating disc provided with a third through hole and a driving assembly for driving the rotating disc to rotate, so that the optical fiber torsion device has the characteristics of simple structure and convenience in adjustment and maintenance.
Any combination of the above optional solutions may be adopted to form an optional embodiment of the present invention, which is not described herein.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The optical fiber torsion device is characterized by comprising a rotary disk, a first limiting piece and a second limiting piece which are symmetrically arranged on the upper side and the lower side of the rotary disk;
the first limiting piece is provided with a first through hole for the optical fiber to be led in, the second limiting piece is provided with a second through hole for the optical fiber to be led out, the rotating disk is provided with at least one pair of third through holes which are symmetrical relative to the disk center of the rotating disk, and the optical fiber passes through one of the third through holes;
the first through hole, the second through hole and the third through hole are all provided with smooth inner walls;
the optical fiber torsion device is further provided with a driving assembly, and the rotating disc is driven by the driving assembly to rotate around the disc center of the rotating disc so as to twist the optical fiber;
the first through hole and the second through hole are on the same straight line with the center of the rotating disk;
under the drive of the drive component, the rotating disc rotates around the disc center of the rotating disc along a clockwise direction or a counterclockwise direction or alternately rotates along a bidirectional direction relative to the base frame;
the centers of the first through hole, the second through hole and the third through hole are not on the same straight line.
2. The fiber optic twisting device of claim 1, comprising a pedestal having a hollow structure, the rotating disk being mounted on top of the hollow structure.
3. The fiber optic torsional device of claim 1 wherein the drive assembly includes a rotating shaft mounted on a hub of the rotating disk and a drive motor, the rotating shaft being connected to the drive motor;
the rotating disc is driven by the driving motor to alternately rotate along the two-way direction around the rotating shaft.
4. An optical fiber twisting device according to claim 2, wherein,
the bottom of the rotating disk is provided with an annular convex rib, and the upper surface of the base frame is provided with an annular groove corresponding to the annular convex rib.
5. An optical fiber twisting device according to claim 2, wherein,
the upper surface of bed frame is provided with a plurality of hemisphere recesses, the bottom of rotary disk be equipped with the depressed part that the hemisphere recess corresponds, a plurality of all be equipped with the ball in the hemisphere recess, the ball with the depressed part contact.
6. An optical fiber twisting device according to claim 2, wherein,
the driving assembly comprises a motor, a rotating shaft connected to the motor and a driving gear arranged on the rotating shaft;
the outer edge of the rotating disc is in a gear shape, and the rotating disc is meshed with the driving gear.
7. An optical fiber twisting device according to claim 2, wherein,
and the base frame is also fixedly provided with a displacement limiting member, and the displacement limiting member is positioned above the edge of the rotating disk.
8. The optical fiber twisting device according to claim 1, wherein,
the third through holes are a pair;
the rotary disc is provided with a strip-shaped gap, the strip-shaped gap passes through the disc center of the rotary disc, and the distances from the two ends of the strip-shaped gap to the disc center of the rotary disc are equal;
two cylindrical parts symmetrical relative to the disk center of the rotating disk are clamped on the strip-shaped gap, and the two cylindrical parts are respectively provided with the third through holes.
9. The optical fiber twisting device according to claim 1, wherein,
the third through holes are in a plurality of pairs;
and the hole centers of all the third through holes are positioned on the same straight line.
10. The fiber optic twisting device of claim 1, wherein the first through hole, the second through hole, and the third through hole have the same diameter.
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| CN201710282583.5A CN108793725B (en) | 2017-04-26 | 2017-04-26 | Optical fiber torsion device |
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| CN108793725B true CN108793725B (en) | 2024-01-02 |
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