CN108793725B - Optical fiber torsion device - Google Patents

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

An optical fiber twisting device

Technical field

The present invention relates to the technical field of optical fiber manufacturing, and in particular to an optical fiber twisting device.

Background technique

Polarization mode dispersion refers to polarization dispersion in single-mode optical fiber, referred to as PMD (Polarization Mode Dispersion). It is dispersion caused by the slight asymmetry of the fiber cross-section. This asymmetry causes two mutually perpendicular basic polarization modes to behave in different directions. Speed spreads. If the polarization mode dispersion is large, it will cause waveform degradation in the signal light transmitted in the optical fiber, making it difficult to separate adjacent pulses and causing problems such as limited transmission capacity. Therefore, it is hoped to suppress the polarization mode dispersion as small as possible. . In addition, the main factor in the slight asymmetry of the optical fiber cross-section is that the cross-sectional shape of the optical fiber is an elliptical cross-section. In the manufacturing of optical fibers, no matter which optical fiber base material manufacturing method is selected and which optical fiber base material is spun Even with the method of manufacturing a bare optical fiber (drawing), it is actually very difficult to achieve a completely circular cross-sectional shape including the core portion of the optical fiber and its surrounding cladding portion.

In the existing technology, during the fiber drawing process, the optical fiber is generally twisted by a "clamping" method, thereby improving the problem of large polarization mode dispersion caused by the elliptical cross-section during the fiber forming process, and achieving the purpose of stably controlling polarization mode dispersion. . However, no matter whether the twisting equipment uses double-wheel rubbing or single-wheel rubbing, it will squeeze the surface of the optical fiber and cause varying degrees of surface damage, thereby causing certain economic losses; in addition, the twisting equipment is relatively complex. , bulky and difficult to adjust and maintain.

Contents of the invention

In order to solve the above-mentioned problems in the prior art, embodiments of the present invention provide an optical fiber twisting device that can reduce polarization mode dispersion during the optical fiber drawing process, while avoiding surface damage caused by squeezing the optical fiber surface, and the optical fiber The twisting device has the characteristics of simple structure and easy adjustment and maintenance. The technical solutions are as follows:

An embodiment of the present invention provides an optical fiber twisting device. The optical fiber twisting device includes a rotating disk, a first limiting member and a second limiting member symmetrically arranged on the upper and lower sides of the rotating disk;

The first limiting member is provided with a first through hole for introducing the optical fiber, the second limiting member is provided with a second through hole for the optical fiber to be led out, and the rotating disk is provided with an opening relative to the rotating disk. At least a pair of third through holes symmetrical at the center of the 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 all have smooth inner walls;

The optical fiber twisting device is further provided with a driving component. Driven by the driving component, the rotating disk rotates around the center of the rotating disk, so that the optical fiber is twisted.

Preferably, the optical fiber twisting device includes a base frame with a hollow structure, and the rotating disk is installed on the top of the hollow structure;

The first through hole, the second through hole and the center of the rotating disk are on the same straight line;

Driven by the driving assembly, the rotating disk rotates in a clockwise direction or a counterclockwise direction or alternately rotates in both directions relative to the base frame around the center of the rotating disk.

Preferably, the driving assembly includes a rotating shaft and a driving motor, the rotating shaft is installed on the center of the rotating disk, and the rotating shaft is connected to the driving motor;

The centers of the first through hole, the second through hole and the third through hole are not on the same straight line;

Driven by the driving motor, the rotating disc rotates alternately in both directions around the rotating axis.

Furthermore, 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.

Further, a plurality of hemispherical grooves are provided on the upper surface of the base frame, and a recessed portion corresponding to the hemispherical grooves is provided on the bottom of the rotating disk. Each of the plurality of hemispherical grooves is Balls are provided, and the balls are in contact with the recessed portion.

Preferably, the driving assembly includes a motor, a rotating shaft connected to the motor, and a driving gear mounted on the rotating shaft;

The outer edge of the rotating disk is gear-shaped, and the rotating disk meshes with the driving gear.

Preferably, a displacement limiting member is also fixed on the base frame, and the displacement limiting member is located above the edge of the rotating disk.

Preferably, the third through holes are a pair;

The rotating disk is provided with a strip-shaped gap, if the strip-shaped gap passes through the center of the rotating disk, and the distance from both ends of the strip-shaped gap to the center of the rotating disk is equal;

Two cylindrical parts that are symmetrical with respect to the 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, there are multiple pairs of third through holes;

The hole centers of all the third through holes are located on the same straight line.

Preferably, the first through hole, the second through hole and the third through hole have the same diameter.

The beneficial effects brought by the technical solutions provided by the embodiments of the present invention are:

Since the first limiting member and the second limiting member of the optical fiber twisting device are symmetrically arranged on the upper and lower sides of the rotating disk, the first limiting member is provided with a first through hole for introducing the optical fiber, and the second limiting member is provided with a first through hole for introducing the optical fiber. The second through hole from which the optical fiber is led out. The rotating disk is provided with at least a pair of third through holes that are symmetrical with respect to the center of the rotating disk. The optical fiber passes through one of the third through holes, so that the optical fiber passes through the first limiting member in turn. After the first through hole, one third through hole of at least a pair of third through holes of the rotating disk, and the second through hole of the second limiting member, the rotating disk is driven by the driving assembly to rotate around its disk center, so as to The optical fiber is twisted, thereby solving the problem of large polarization mode dispersion caused by the elliptical cross-section during the fiber forming process, and achieving the purpose of stably controlling polarization mode dispersion; at the same time, due to the first through hole, the second through hole, and the third through hole, The holes all have smooth inner walls, so when the optical fiber twisting device twists the optical fiber, the first through hole, the second through hole, and the third through hole will not squeeze the surface of the optical fiber and cause surface damage; in addition, due to the The optical fiber twisting device mainly consists of a first limiting member provided with a first through hole, a second limiting member provided with a second through hole, a rotating disk provided with a third through hole, and a driving assembly that drives the rotating disk to rotate. Therefore, the optical fiber twisting device has the characteristics of simple structure and easy adjustment and maintenance.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of an optical fiber manufacturing system;

Figure 2 is a schematic three-dimensional structural diagram of an optical fiber twisting device provided by an embodiment of the present invention;

Figure 3 is a schematic cross-sectional structural diagram of an optical fiber twisting device provided by an embodiment of the present invention;

Figure 4 is a partially enlarged schematic diagram of circle A in Figure 3;

Figure 5 is another partially enlarged schematic diagram of circle A in Figure 3;

Figure 6 is a schematic structural diagram of a rotating disk provided by an embodiment of the present invention;

Figure 7 is a schematic structural diagram of a rotating disk provided by an embodiment of the present invention;

Figure 8 is a schematic cross-sectional structural diagram of an optical fiber twisting device provided by an embodiment of the present invention.

The corresponding component names represented by the numbers in the figure:

1. Clamping device; 2. Optical fiber preform; 3. Melting furnace; 4. Softening molding area; 5. Primary cooling device; 6. Secondary cooling device; 7. Tertiary cooling device; 8. Coating device; 9. Curing device; 10. Optical fiber twisting device; 11. Positioning wheel; 12. Take-up device; 13. Optical fiber; 101. Base frame; 102. First limiter; 103. Second limiter; 104. Rotation Disk; 105. Driving assembly; 106. Displacement limiter; 1011. Annular groove; 1012. Hemispherical groove; 1013. Ball; 1021. First through hole; 1031. Second through hole; 1041. Third through hole ; 1042. Annular ribs; 1043. Strip gaps; 1044. Cylindrical parts; 1051. Motor; 1052. Rotating shaft; 1053. Driving gear; 1054. Rotating shaft; 1055. Driving motor.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, 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. Obviously, the described embodiments are only Some embodiments of the present invention are not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and cannot be understood as limiting the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and The simplified description is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

Embodiments of the present invention provide an optical fiber twisting device. The optical fiber twisting device can be used in the manufacturing process of low polarization mode dispersion optical fibers to solve the problem of large polarization mode dispersion caused by the elliptical cross-section of the optical fiber, while avoiding damage to the optical fiber. The surface is squeezed and causes surface damage.

Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of an optical fiber manufacturing system. The optical fiber manufacturing system consists of a clamping device 1, a melting furnace 3, a softening molding area 4, a primary cooling device 5, a secondary cooling device 6, a tertiary cooling device 7, and a coating device 8 that are sequentially arranged along the fiber drawing direction. The curing device 9, the optical fiber twisting device 10, the positioning wheel 11, and the take-up device 12 are used to manufacture the optical fiber. Among them, the process of manufacturing optical fibers by the optical fiber manufacturing system is: first, the optical fiber preform 2 is sent into the melting furnace 3 through the clamping device 1, and the drawn optical fiber is rotated on the axis while being heated in the softening and molding zone 4, and passes through the first-level cooling device 5. The secondary cooling device 6 and the tertiary cooling device 7 perform step-by-step annealing, gradually cooling to 40°~50°, and then pass through the coating device 8 to coat the exposed silica glass body with a resin protective layer, and then pass through the curing device 9 The cured resin forms a coating to ensure the strength and hardness of the optical fiber, and then the optical fiber is twisted through the optical fiber twisting device 10. Finally, after passing through the positioning wheel 11, the optical fiber is wound on a special plate using the take-up device 12 to complete the optical fiber manufacturing. process.

Embodiment 1

Referring to Figure 2, Figure 2 is a schematic three-dimensional structural diagram of an optical fiber twisting device provided by an embodiment of the present invention. The optical fiber twisting device 10 includes a base frame 101, a first limiting member 102, a second limiting member 103, a rotating disk 104 and a driving assembly 105.

Specifically, the base frame 101 has a cylindrical hollow structure, the rotating disk 104 is erected on the top of the hollow structure, and the first limiting member 102 and the second limiting member 103 are symmetrically arranged on the upper and lower sides of the rotating disk 104; first The distance between the limiting member 102, the second limiting member 103 and the rotating disk 104 is adjustable. Wherein, the first limiting member 102 and the second limiting member 103 can be respectively fixed on a supporting structure (not shown), and the supporting structure can 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, and the rotating disk 104 is provided with at least a pair of third through holes 1041 that are symmetrical with respect to the center of the rotating disk 104. , wherein the first through hole 1021 is used for the optical fiber 13 to be introduced, the second through hole 1031 is used for the optical fiber 13 to be led out, and the third through hole 1041 is used for the optical fiber 13 to pass through.

The first through hole 1021, the second through hole 1031, and the third through hole 1041 all have smooth inner walls to ensure that no damage is caused to the optical fiber surface when the optical fiber is twisted. The inner wall cross-sections of the first through hole 1021, the second through hole 1031, and the third through hole 1041 may be circular or elliptical; wherein the first through hole 1021, the second through hole 1031, and the third through hole 1041 The through holes 1034 have the same diameter, and the same diameter is set according to the diameter of the optical fiber, so that the optical fiber can pass through, and at the same time, the first through hole 1021 and the second through hole 1031 can be passed through the rotation of the rotating disk. The optical fiber with the third through hole 1034 is twisted. In practical applications, the diameters of the first through hole 1021, the second through hole 1031 and the third through hole 1034 can all be set to 2mm±0.1mm. The first through hole 1021, the second through hole 1031 and the third through hole 1034 have the same depth, and the depth can be set to 5mm±0.5mm.

Driven by the driving assembly 105, the rotating disk 104 rotates around the center of the rotating disk 104 relative to the base frame 101, causing the optical fiber to twist. Among them, the driving component 105 is fixedly installed inside the base frame 101. The driving component 105 is in contact with the rotating disk 104 to control the rotating disk 104 to rotate around its center, 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 as 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 both on the central axis of the rotating disk 104. , therefore when the optical fiber 13 passes through the first through hole 1021, the second through hole 1031 and the third through hole 1041 in sequence, the optical fiber 13 forms a certain angle at the third through hole 1041 along its length direction. The distance between the first limiter 102, the second limiter 103 and the rotating disk 104, or the third through hole for the optical fiber to pass through, is changed so that the angle is limited to the range of 10° to 45°. The present invention is suitable for all The size of the angle formed is not specifically limited.

Driven by the driving assembly 105, the rotating disk 104 rotates clockwise or counterclockwise or alternately in both directions around its center relative to the base frame 101. Among them, during the fiber drawing process, the optical fiber is given a certain tension, such as a tension range of 3 to 5N, to ensure that the optical fiber is twisted by the rotation of the rotating disk. Since the driving assembly 105 controls the rotating disk 104 to only perform circular rotation, rotate in the counterclockwise direction, or rotate in the clockwise direction, or alternately rotate back and forth within a certain rotation angle, the alternate rotation is clockwise or counterclockwise. Turn alternately. Among them, the rotation direction and rotation angle can be determined by the twist parameters set by the operator on the control panel connected to the driving assembly 105. The setting of the twist parameters ensures that in one rotation cycle, each meter of optical fiber twists 1 ~35 turns to achieve the optical fiber polarization mode dispersion coefficient not greater than 0.04ps/km ^1/2 .

Further, referring to FIG. 3 and FIG. 4 , FIG. 3 is a schematic cross-sectional structural diagram of an optical fiber twisting device provided by an embodiment of the present invention. FIG. 4 is a partially enlarged schematic diagram circled A in FIG. 3 . The bottom of the rotating disk 104 An annular convex rib 1042 is provided, and an annular groove 1011 corresponding to the annular convex rib 1042 is provided on the upper surface of the base frame 101 . Among them, the ring center of the annular groove is set on the vertical center line of the hollow structure of the base frame 101. When the rotating disk 104 rotates, the annular ribs 1042 cooperate with the annular groove 1011, and the rotating disk 104 is positioned at the annular groove. The annular rib 1042 and the annular groove 1011 can be rotated within the formed annular track. In practical applications, the surfaces of the annular convex rib 1042 and the annular groove 1011 can be set as smooth surfaces, so that there is less friction between the annular convex rib 1042 and the annular groove 1011. , so that the rotating disk 104 can rotate smoothly relative to the base frame 101 .

It should be noted that the structure between the bottom of the rotating disk 104 and the base frame 101 is not limited to the above structure. In practical applications, an annular groove can also be provided at the bottom of the rotating disk 104 and the surface of the base frame 101 is provided with The annular ribs corresponding to the annular groove only need to be able to rotate the rotating disk 104 around its center relative to the base frame 101 when driven by the driving assembly 105. This is not specifically limited in the embodiment of the present invention.

In another implementation of the embodiment of the present invention, with reference to Figure 5, Figure 5 is another partially enlarged schematic diagram circled A in Figure 3. The upper surface of the base frame 101 is provided with a plurality of hemispherical grooves. 1012. The bottom of the rotating disk 104 is provided with a recessed portion (not labeled) corresponding to the hemispherical groove 1012. Balls 1013 are provided in the plurality of hemispherical grooves 1012, and the balls 1013 are in contact with the recessed portion. Among them, a plurality of hemispherical grooves 1012 are evenly 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 ring center.

In this embodiment, driven by the driving assembly 105, the plurality of balls 1013 at the bottom of the rotating disk 104 respectively roll in the plurality of hemispherical grooves 1012 of the base frame 101, and the balls 1013 contact the recessed portion of the rotating disk 104. , so that the rotating disk 104 can rotate smoothly around its center relative to the base frame 101 .

Further, as shown in Figure 3, the driving assembly 105 includes a motor 1051, a rotating shaft 1052 connected to the motor 1051, and a driving gear 1053 installed on the rotating shaft 1052; the outer edge of the rotating disk 104 is gear-shaped, and the rotating disk 104 is connected to the driving gear. Gears 1053 mesh.

Among them, the rotating shaft 1052 is fixedly connected to the driving gear 1053. Under the operation of the motor 1051 and according to the set parameters, the rotating shaft 1052 drives the driving gear 1053 to rotate. Since the driving gear 1053 meshes with the outer peripheral teeth of the rotating disk 104, This drives the rotating disk 104 to rotate, causing the optical fiber passing through one of the third through holes 1041 of the rotating disk 104 to twist, and then the mechanical wave of vibration generated by the twisting is transmitted along the optical fiber to the softening zone where the optical fiber is drawn and formed. Periodic rotation improves the cladding out-of-roundness of the optical fiber and achieves the effect of reducing polarization mode dispersion in optical fiber production.

It should be noted that in other embodiments, the driving assembly can also be configured as other driving structures, such as the driving assembly as a belt driving structure. The embodiment of the present invention does not limit the specific structure of the driving assembly.

Further, as shown in FIGS. 2 and 3 , a displacement limiter 106 is also fixed on the base frame 101 . The displacement limiter 106 is located above the edge of the rotating disk 104 . The displacement limiter 106 is in a strip shape and is used for When the rotating disk 104 rotates, the upward movement of the rotating disk 104 is restricted. Preferably, there are three displacement limiting members 106 to further ensure the stability of the rotation of the rotating disc 104 while restricting the upward movement of the rotating disc 104 .

It should be noted that the structure and number of the displacement limiter 106 are not limited to the above-mentioned settings. In practical applications, the displacement limiter 106 can also be set as an annular displacement limiter with the center of the rotating disk 104 as the center of the ring. member, wherein the annular displacement limiting member is located above the edge of the rotating disk. The structure and number of the displacement limiting member 106 are not specifically limited in the embodiment of the present invention.

Further, referring to Figure 6, Figure 6 is a schematic structural diagram of a rotating disk provided by an embodiment of the present invention. The third through holes 1041 are a pair; the rotating disk 104 is provided with a strip slit 1043, and the strip slit 1043 rotates The distance between the two ends of the strip-shaped gap 1043 and the center of the rotating disk 104 is equal; two cylindrical parts 1044 that are symmetrical with respect to the center of the rotating disk 104 are respectively clamped on the strip-shaped gap 1043. , the two cylindrical components 1044 are respectively provided with third through holes 1041, wherein the distance between the two cylindrical components 1044 and the center of the rotating disk 104 can be adjusted in practical applications, and after adjustment, the two cylindrical components 1044 can be adjusted. The position of the cylindrical component 1044 is fixed on the strip slit 1043 by a clamping method to ensure the stability of the twisting of the optical fiber passing through the third through hole 1041.

In another implementation of this embodiment, there are multiple pairs of third through holes 1041; the hole centers of all third through holes 1041 are located on the same straight line. Referring to Figure 7, Figure 7 is a schematic structural diagram of a rotating disk provided in another embodiment of the present invention. The rotating disk 104 is provided with two pairs of third through holes 1041, and all third through holes of the two pairs are The hole centers of the third through holes 1041 are all located on the same straight line. Since the third through holes 1041 are arranged in pairs on the rotating disk 104, the stability of the rotation of the rotating disk 104 is ensured.

It should be noted that in other implementations of the embodiment of the present invention, it is also possible to arrange that all the hole centers of the plurality of pairs of third through holes are not located on the same straight line.

An embodiment of the present invention provides an optical fiber twisting device. Since the first limiting member and the second limiting member of the optical fiber twisting device are symmetrically arranged on the upper and lower sides of the rotating disk, the first limiting member is provided with a third hole for introducing the optical fiber. A through hole and a second limiting member are provided with a second through hole for leading out the optical fiber. The rotating disk is provided with at least a pair of third through holes that are symmetrical with respect to the center of the rotating disk. The optical fiber passes through one of the third through holes. Therefore, after the optical fiber passes through the first through hole of the first limiting member, one of at least a pair of third through holes of the rotating disk, and the second through hole of the second limiting member in sequence, it is driven down by the driving assembly. The rotating disc rotates around its center to twist the optical fiber, thereby solving the problem of large polarization mode dispersion caused by the elliptical cross-section during the fiber forming process, and achieving the purpose of stably controlling polarization mode dispersion; at the same time, due to the first through hole, The second through hole and the third through hole both have smooth inner walls. Therefore, when the optical fiber twisting device twists the optical fiber, the first through hole, the second through hole and the third through hole will not squeeze the surface of the optical fiber. Cause surface damage; in addition, because the optical fiber twisting device mainly consists of a first limiting member provided with a first through hole, a second limiting member provided with a second through hole, a rotating disk provided with a third through hole, and a drive The optical fiber twisting device is composed of a driving assembly for rotating the rotating disk, so the optical fiber twisting device has the characteristics of simple structure and easy adjustment and maintenance.

Embodiment 2

Referring to FIG. 8 , FIG. 8 is a schematic cross-sectional structural diagram of an optical fiber twisting device provided by an embodiment of the present invention. The optical fiber twisting device 10 includes a first limiting member 102 , a second limiting member 103 , a rotating disk 104 and a driving assembly 105 .

Specifically, the first limiting member 102 and the second limiting member 103 are symmetrically arranged on the upper and lower sides of the edge of the rotating disk 104; the distance between the first limiting member 102, the second limiting member 103 and the rotating disk 104 is Adjustable. Wherein, the first limiting member 102 and the second limiting member 103 can be respectively fixed on a supporting structure (not shown).

The first limiting member 102 is provided with a first through hole 1021 for the introduction of the optical fiber 13. The second limiting member 103 is provided with a second through hole 1031 for the optical fiber 13 to be led out. The rotating disk 104 is provided with a structure that is symmetrical with respect to the center of the rotating disk. There are at least a pair of third through holes 1041, 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 all have smooth inner walls to ensure that no damage is caused to the optical fiber surface when the optical fiber is twisted. The inner wall cross-sections of the first through hole 1021, the second through hole 1031, and the third through hole 1041 may be circular or elliptical; wherein the first through hole 1021, the second through hole 1031, and the third through hole 1041 The through holes 1041 have the same diameter, and the same diameter is set according to the diameter of the optical fiber, so that the optical fiber can pass through, and at the same time, the first through hole 1021 and the second through hole 1031 can be passed through the rotation of the rotating disk. The optical fiber in the third through hole 1041 is twisted. In practical applications, the diameters of the first through hole 1021, the second through hole 1031, and the third through hole 1041 can all be set to 2 mm ± 0.1 mm. The first through hole 1021, the second through hole 1031 and the third through hole 1041 have the same depth, and the depth can be set to 5mm±0.5mm.

The optical fiber twisting device is also provided with a driving assembly 105. Driven by the driving assembly 105, the rotating disk 104 rotates around the center of the rotating disk 104 to cause the optical fiber 13 to twist.

The driving assembly 105 includes a rotating shaft 1054 and a driving motor 1055. The rotating shaft 1054 is installed on the center of the rotating disk 104, and the rotating 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 straight line. The third through hole 1041 is among all the third through holes on the rotating disk 104 and the first through hole 1021 and the second through hole 1041 are not in the same straight line. The through hole 1031 is the closest third through hole. When the optical fiber 13 passes through the first through hole 1021, the second through hole 1031 and the third through hole 1041 in sequence, the optical fiber 13 forms a certain angle at the third through hole 1041 along its length direction. The first through hole 1041 can be adjusted appropriately. The distance between the limiter 102, the second limiter 103 and the rotating disk 104, or the third through hole for the optical fiber to pass through, is changed so that the angle is limited to the range of 120 degrees to 150 degrees. The present invention can The angle size is not specifically limited.

Driven by the driving motor 1055, the rotating disk 104 alternately rotates in a bidirectional direction around the rotation axis 1054, and the bidirectional alternating rotation angle range is -90° to +90°. Among them, during the fiber drawing process, the optical fiber is given a certain tension, such as a tension range of 3 to 5N, to ensure that the optical fiber is twisted by the rotation of the rotating disk. The rotation angle can be limited by the torsion parameters set by the operator on the control panel connected to the driving assembly 105 to ensure that the optical fiber will not be wrapped around the rotating disk 104 .

An embodiment of the present invention provides an optical fiber twisting device. Since the first limiting member and the second limiting member of the optical fiber twisting device are symmetrically arranged on the upper and lower sides of the rotating disk, the first limiting member is provided with a third hole for introducing the optical fiber. A through hole and a second limiting member are provided with a second through hole for leading out the optical fiber. The rotating disk is provided with at least a pair of third through holes that are symmetrical with respect to the center of the rotating disk. The optical fiber passes through one of the third through holes. Therefore, after the optical fiber passes through the first through hole of the first limiting member, one of at least a pair of third through holes of the rotating disk, and the second through hole of the second limiting member in sequence, it is driven down by the driving assembly. The rotating disc rotates around its center to twist the optical fiber, thereby solving the problem of large polarization mode dispersion caused by the elliptical cross-section during the fiber forming process, and achieving the purpose of stably controlling polarization mode dispersion; at the same time, due to the first through hole, The second through hole and the third through hole both have smooth inner walls. Therefore, when the optical fiber twisting device twists the optical fiber, the first through hole, the second through hole and the third through hole will not squeeze the surface of the optical fiber. Cause surface damage; in addition, because the optical fiber twisting device mainly consists of a first limiting member provided with a first through hole, a second limiting member provided with a second through hole, a rotating disk provided with a third through hole, and a drive The optical fiber twisting device is composed of a driving assembly for rotating the rotating disk, so the optical fiber twisting device has the characteristics of simple structure and easy adjustment and maintenance.

All the above optional technical solutions can be combined in any way to form optional embodiments of the present invention, and will not be described again one by one.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

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.