Low-loss high-strength special optical fiber

Abstract

A low-loss high-strength special optical fiber comprises a fiber core, a wrapping layer arranged on the surface of the fiber core and a coating layer covering the wrapping layer, the peripheral side of the coating layer is fixedly sleeved with a basic protection layer, and the peripheral side of the basic protection layer is fixedly connected with a plurality of reinforcing protection strips evenly distributed in the peripheral direction of the fiber core. The fiber core is provided with reinforcing protection strips, the reinforcing protection strips are parallel to the fiber core, a deformation space is formed between every two adjacent reinforcing protection strips, all the reinforcing protection strips are jointly surrounded by a lantern ring, the inner side wall of the lantern ring is fixedly connected with a plurality of buffer assemblies, and the buffer assemblies extend into the deformation spaces in a one-to-one correspondence mode. The invention provides a low-loss high-strength special optical fiber which has higher strength and impact resistance and can avoid loss caused by local tiny bending.

Description

Technical Field

[0001] The invention relates to the field of optical fibers, in particular to a low-loss and high-strength special optical fiber. Background Art

[0002] Optical fiber is the abbreviation of optical fiber, which is a fiber made of glass or plastic. It conducts light through the principle of total reflection of light, thereby realizing the function of transmitting information.

[0003] In practical applications, it is difficult for optical fibers to conduct light losslessly. Many factors can cause light loss in optical fibers. For example, when a local microbend occurs in an optical fiber, the incident angle of light at the junction of the core and the cladding will change, which in turn makes it impossible to meet the total reflection condition, causing part of the light to scatter through the cladding and coating, resulting in light loss. These losses caused by the inability to maintain total reflection can be called reflection losses.

[0004] On the other hand, in some scenarios, because the optical fiber may frequently shake, or frequently collide with other objects, or even be squeezed by other objects, the optical fiber needs to have sufficient strength to avoid damage and breakage of the optical fiber, which may cause data transmission interruption.

[0005] In the existing technology, special optical fibers mostly focus on solving one of the problems and cannot solve the above two problems at the same time. Summary of the invention

[0006] In order to solve the deficiencies in the prior art, the present invention provides a low-loss and high-strength special optical fiber, which has higher strength and impact resistance and can avoid losses caused by local micro-bending.

[0007] In order to achieve the above object, the specific scheme adopted by the present invention is: A low-loss and high-strength special optical fiber comprises a fiber core, a cladding arranged on the surface of the fiber core, and a coating layer covering the cladding, wherein a basic protective layer is fixedly sleeved on the circumferential side of the coating layer, a plurality of reinforcing protection strips uniformly distributed along the circumferential direction of the fiber core are fixedly connected to the circumferential side of the basic protective layer, and the reinforcing protection strips are parallel to the fiber core, a deformation space is formed between two adjacent reinforcing protection strips, all the reinforcing protection strips are surrounded by a ring, a plurality of buffer components are fixedly connected to the inner side wall of the ring, and the buffer components extend into the deformation space one by one.

[0008] Preferably, a reinforcement line is passed through the reinforcement protection strip, and the reinforcement line is parallel to the fiber core.

[0009] Preferably, a plurality of groups of positioning cones are fixedly provided on the inner wall of the collar, one group of the positioning cones corresponds to one of the reinforcing protection strips, and the positioning cones can penetrate into the reinforcing protection strips.

[0010] Preferably, the collar is formed by bending a strip-shaped main body and fixing both ends thereof in a fixed connection.

[0011] Preferably, one end of the main body is fixedly connected with a connecting part and an embedding part in sequence, the width of the main body is greater than the width of the embedding part, the width of the embedding part is greater than the width of the connecting part, and the other end of the main body is provided with a first accommodating groove and a second accommodating groove which are interconnected, the connecting part can be inserted into the first accommodating groove, and the embedding part can be inserted into the second accommodating groove.

[0012] Preferably, one end of the main body is provided with a plurality of first through holes, and the other end of the main body is provided with a plurality of second through holes.

[0013] Preferably, a distance is left between the buffer component and the base protective layer to form a buffer area.

[0014] Preferably, the buffer assembly comprises a plurality of first elastic columns fixedly connected to the collar, all of the first elastic columns are distributed in a matrix, and a first gap is left between two adjacent first elastic columns.

[0015] Preferably, the buffer assembly comprises a plurality of elastic tubes which are coaxially arranged and fixedly connected to the collar, and a second gap is left between two adjacent elastic tubes.

[0016] Preferably, the buffer assembly further comprises a second elastic column, which is disposed in the innermost elastic tube and fixedly connected to the collar.

[0017] In the special optical fiber of the present invention, a basic protective layer is arranged on the coating layer, and the basic protective layer is used to strengthen the structure of the optical fiber, avoid local micro-bending of the optical fiber, and then avoid loss caused by local micro-bending, so as to achieve the effect of low loss. On the basis of setting the basic protective layer, the present invention sets a plurality of reinforcing protection strips around the basic protective layer. On the one hand, the reinforcing protection strips can improve the impact resistance of the optical fiber. When the optical fiber is impacted, the reinforcing protection strips can absorb part of the impact energy and realize the protection of the optical fiber core. On the other hand, the reinforcing protection strips can also improve the anti-torsion performance of the optical fiber. When the optical fiber is twisted, the reinforcing protection strips will accumulate energy. When the optical fiber is not subjected to external force, the reinforcing protection strips can be restored and drive the optical fiber core to restore, avoiding damage caused by long-term distortion of the optical fiber core, and further improving the overall strength. In order to further improve the strength and impact resistance of the optical fiber, the present invention also sets a ferrule and a buffer assembly. The ferrule can be arranged at a position where the optical fiber needs to be bent or is susceptible to impact according to the actual application requirements of the optical fiber. After the ferrule is fixed, the buffer assembly extends into the deformation space. When the optical fiber is impacted, the collar can absorb the impact energy and deform, and drive the buffer component to move in the deformation space. When the buffer component contacts the base protective layer or the reinforced protective strip, it can deform, thereby further absorbing the impact energy and protecting the optical fiber core. On the other hand, the location of the collar can further improve the overall strength and reduce the possibility of slight bending of the optical fiber core, thereby reducing the loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the special optical fiber of the present invention; Figure 2 is a structural schematic diagram of the first embodiment of the elastic component; Figure 3 It is a schematic diagram of the connection method at both ends of the collar body; Figure 4 It is a structural schematic diagram of the second embodiment of the elastic component.

[0020] Figure numerals: 1-fiber core, 2-cladding, 3-coating layer, 4-basic protective layer, 5-reinforcement protection strip, 6-reinforcement wire, 7-ring, 8-buffer assembly, 9-positioning cone, 10-deformation space, 11-buffer area, 12-first elastic column, 13-first gap, 14-connecting part, 15-embedded part, 16-first through hole, 17-second through hole, 18-elastic tube, 19-second gap, 20-second elastic column. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] A low-loss and high-strength special optical fiber comprises a core 1, a cladding 2 arranged on the surface of the core 1, and a coating layer 3 covering the cladding 2, a basic protective layer 4 is fixedly sleeved on the circumferential side of the coating layer 3, a plurality of reinforcing protection strips 5 evenly distributed along the circumferential direction of the core 1 are fixedly connected to the circumferential side of the basic protective layer 4, and the reinforcing protection strips 5 are parallel to the core 1, and a deformation space 10 is formed between two adjacent reinforcing protection strips 5, all the reinforcing protection strips 5 are surrounded by a ring 7, and a plurality of buffer components 8 are fixedly connected to the inner side wall of the ring 7, and the buffer components 8 extend into the deformation space 10 one by one.

[0023] In the special optical fiber of the present invention, the core 1, cladding 2 and coating 3 are all conventional optical fiber structures, hereinafter referred to as the optical fiber core, and its specific structure and principle are not repeated here. In addition to the optical fiber core, a basic protective layer 4 is provided on the coating layer 3, and the basic protective layer 4 is used to strengthen the structure of the optical fiber to avoid local micro-bending of the optical fiber, thereby avoiding loss caused by local micro-bending and achieving a low-loss effect. On the basis of setting the basic protective layer 4, the present invention sets a plurality of reinforcing protection strips 5 around the basic protective layer 4. On the one hand, the reinforcing protection strips 5 can improve the impact resistance of the optical fiber. When the optical fiber is impacted, the reinforcing protection strips 5 can absorb part of the impact energy and protect the optical fiber core. On the other hand, the reinforcing protection strips 5 can also improve the torsion resistance of the optical fiber. When the optical fiber is twisted, the twisting of the reinforcing protection strips 5 will accumulate energy. When the optical fiber is not subjected to external force, the reinforcing protection strips 5 can be restored and drive the optical fiber core to recover, avoiding damage caused by long-term twisting of the optical fiber core, and further improving the overall strength. In order to further improve the strength and impact resistance of the optical fiber, the present invention also provides a ring 7 and a buffer assembly 8. The ring 7 can be set at a position where the optical fiber needs to be bent or is susceptible to impact according to the actual application requirements of the optical fiber. After the ring 7 is fixed, the buffer assembly 8 extends into the deformation space 10. When the optical fiber is impacted, the ring 7 can absorb the impact energy and deform, and drive the buffer assembly 8 to move in the deformation space 10. When the buffer assembly 8 contacts the basic protective layer 4 or the reinforced protective strip 5, it can deform, thereby further absorbing the impact energy and protecting the optical fiber core. On the other hand, the position where the ring 7 is set can further improve the overall strength and reduce the possibility of slight bending of the optical fiber core, thereby reducing the loss.

[0024] In order to further enhance the protective effect of the reinforcing protection strip 5 on the optical fiber core, a reinforcing wire 6 is passed through the reinforcing protection strip 5, and the reinforcing wire 6 is parallel to the optical fiber core 1. The reinforcing wire 6 can be made of metal, and when the optical fiber is subjected to shear force, the reinforcing wire 6 can protect the optical fiber core from all directions to prevent the optical fiber core from breaking, thereby further enhancing the overall strength.

[0025] In order to ensure that the buffer assembly 8 can move and deform smoothly in the deformation space 10, it is necessary to make the capacity of the deformation space 10 larger than the volume of the buffer assembly 8. However, if the position of the ring 7 is not stable enough, the buffer assembly 8 may be offset, thereby affecting the buffering effect. In order to avoid this situation, multiple groups of positioning cones 9 are fixedly arranged on the inner wall of the ring 7, and one group of positioning cones 9 corresponds to one reinforcing protection strip 5, and the positioning cones 9 can penetrate into the reinforcing protection strip 5. When the ring 7 is fixed to the sides of all reinforcing protection strips 5, the positioning cones 9 can penetrate into the reinforcing protection strip 5, so that the reinforcing protection strip 5 can be used to limit the positioning cones 9, and then the ring 7 can be limited, fully ensuring the stability of the position of the ring 7, and finally avoiding the displacement of the buffer assembly 8 caused by the rotation of the ring 7 around the optical fiber core, so as to ensure that the buffer assembly 8 can always function stably. In order to further ensure that the buffer assembly 8 can move and deform smoothly in the deformation space 10, a distance is left between the buffer assembly 8 and the base protective layer 4 to form a buffer area 11.

[0026] Furthermore, in order to facilitate the placement of the ferrule 7 at a desired location, i.e., a location where the optical fiber needs to be bent or is susceptible to impact, the ferrule 7 is formed by bending a strip-shaped main body and fixing the two ends together. By using the strip-shaped main body to bend to form the ferrule 7, the location of the ferrule 7 can be flexibly set in actual use without having to fix the location of the ferrule 7 during the production process, which is more flexible and can also reduce costs.

[0027] In order to form the ring 7 by bending the strip-shaped main body, one end of the main body is fixedly connected with a connecting portion 14 and an embedding portion 15 in sequence, the width of the main body is greater than the width of the embedding portion 15, and the width of the embedding portion 15 is greater than the width of the connecting portion 14. The other end of the main body is provided with a first receiving groove and a second receiving groove that are interconnected, the connecting portion 14 can be inserted into the first receiving groove, and the embedding portion 15 can be inserted into the second receiving groove. After the main body is bent, the embedding portion 15 is inserted into the second receiving groove, and the connecting portion 14 is inserted into the first receiving groove. Because the width of the embedding portion 15 is greater than that of the connecting portion 14, the embedding portion 14 cannot be removed from the second receiving groove along the length direction of the main body, thereby fixing the positions of the two ends of the main body. Furthermore, the two ends of the main body can be fixedly connected together by glue filling to form a stable ring 7.

[0028] In order to improve the connection strength at both ends of the main body, one end of the main body is provided with a plurality of first through holes 16, and the other end of the main body is provided with a plurality of second through holes 17. During the glue pouring process, the glue can enter the first through holes 16 and the second through holes 17, and after the glue dries, the two ends of the main body can be fully fixed together to ensure the stability of the ring 7 structure.

[0029] Two embodiments of the buffer assembly 8 are provided below. Embodiment 1

[0030] The buffer assembly 8 includes a plurality of first elastic columns 12 fixedly connected to the collar 7, all of which are distributed in a matrix, and a first gap 13 is left between two adjacent first elastic columns 12. When the collar 7 is impacted, the first elastic column 12 can be deformed. By leaving the first gap 13 between two adjacent first elastic columns 12, sufficient space can be left for the first elastic column 12 to deform. During the deformation process, the first elastic column 12 can absorb the energy of the impact on the collar 7, avoiding the impact energy from directly acting on the optical fiber core, thereby protecting the optical fiber core by using the buffer assembly 8. Embodiment 2

[0031] The buffer assembly 8 includes a plurality of elastic tubes 18 coaxially arranged and fixedly connected to the ferrule 7, and a second gap 19 is left between two adjacent elastic tubes 18. When the ferrule 7 is impacted, the elastic tube 18 can be deformed. By leaving the second gap 19 between adjacent elastic tubes 18, sufficient space can be left for the elastic tube 18 to deform. During the deformation process, the elastic tube 18 can absorb the energy of the impact on the ferrule 7, avoiding the impact energy from directly acting on the optical fiber core, thereby using the buffer assembly 8 to protect the optical fiber core.

[0032] Considering that the wall of the elastic tube 18 cannot be too thick, otherwise the deformation ability is affected, and if the wall of all the elastic tubes 18 is relatively thin, it is easy to lead to insufficient impact resistance. In order to avoid this situation, the buffer assembly 8 also includes a second elastic column 20, which is arranged in the innermost elastic tube 18 and fixedly connected to the collar 7. The second elastic column 20 can support all the elastic tubes 18 to prevent all the elastic tubes 18 from being unable to fully absorb the impact after being deformed.

[0033] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0034] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low-loss, high-strength special optical fiber, comprising a fiber core (1), a cladding (2) arranged on the surface of the fiber core (1), and a coating layer (3) covering the cladding (2), characterized in that: A base protective layer (4) is fixedly sleeved on the circumferential side of the coating layer (3); a plurality of reinforcing protection strips (5) uniformly distributed along the circumferential direction of the fiber core (1) are fixedly connected to the circumferential side of the base protective layer (4); the reinforcing protection strips (5) are parallel to the fiber core (1); a deformation space (10) is formed between two adjacent reinforcing protection strips (5); all the reinforcing protection strips (5) are surrounded by a ring (7); a plurality of buffer components (8) are fixedly connected to the inner side wall of the ring (7); the buffer components (8) extend into the deformation space (10) one by one.

2. A low-loss, high-strength special optical fiber as claimed in claim 1, characterized in that: A reinforcement line (6) is passed through the reinforcement protection strip (5), and the reinforcement line (6) and the fiber core (1) are parallel to each other.

3. A low-loss and high-strength special optical fiber as claimed in claim 1, characterized in that: A plurality of groups of positioning cones (9) are fixedly arranged on the inner wall of the collar (7), one group of the positioning cones (9) corresponds to one of the reinforcing protection strips (5), and the positioning cones (9) can penetrate into the reinforcing protection strip (5).

4. A low-loss and high-strength special optical fiber as claimed in claim 1, characterized in that: The collar (7) is formed by bending a strip-shaped main body and fixing both ends thereof in a fixed connection.

5. A low-loss and high-strength special optical fiber as claimed in claim 4, characterized in that: One end of the main body is fixedly connected with a connecting portion (14) and an embedding portion (15) in sequence, the width of the main body is greater than the width of the embedding portion (15), and the width of the embedding portion (15) is greater than the width of the connecting portion (14), and the other end of the main body is provided with a first receiving groove and a second receiving groove which are connected to each other, the connecting portion (14) can be inserted into the first receiving groove, and the embedding portion (15) can be inserted into the second receiving groove.

6. A low-loss and high-strength special optical fiber as claimed in claim 5, characterized in that: One end of the main body is provided with a plurality of first through holes (16), and the other end of the main body is provided with a plurality of second through holes (17).

7. A low-loss and high-strength special optical fiber as claimed in claim 1, characterized in that: A distance is left between the buffer component (8) and the base protective layer (4) to form a buffer area (11).

8. A low-loss and high-strength special optical fiber as claimed in claim 1, characterized in that: The buffer assembly (8) comprises a plurality of first elastic columns (12) fixedly connected to the collar (7), all of the first elastic columns (12) being distributed in a matrix, and a first gap (13) being left between two adjacent first elastic columns (12).

9. The low-loss and high-strength special optical fiber according to claim 1, characterized in that: The buffer assembly (8) comprises a plurality of elastic tubes (18) which are coaxially arranged and fixedly connected to the collar (7), with a second gap (19) being left between two adjacent elastic tubes (18).

10. A low-loss and high-strength special optical fiber as claimed in claim 9, characterized in that: The buffer assembly (8) further comprises a second elastic column (20), wherein the second elastic column (20) is arranged in the innermost elastic tube (18) and is fixedly connected to the collar (7).

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