CN115220164B - Macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN - Google Patents
Macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN Download PDFInfo
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- CN115220164B CN115220164B CN202210719568.3A CN202210719568A CN115220164B CN 115220164 B CN115220164 B CN 115220164B CN 202210719568 A CN202210719568 A CN 202210719568A CN 115220164 B CN115220164 B CN 115220164B
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- sheath
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- 230000003287 optical effect Effects 0.000 title claims abstract description 57
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 104
- 239000013307 optical fiber Substances 0.000 claims abstract description 44
- 239000000835 fiber Substances 0.000 claims abstract description 29
- 230000001681 protective effect Effects 0.000 claims abstract description 12
- 239000004760 aramid Substances 0.000 claims description 11
- 229920003235 aromatic polyamide Polymers 0.000 claims description 11
- 239000010410 layer Substances 0.000 claims description 10
- 239000011247 coating layer Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims 7
- 239000010959 steel Substances 0.000 claims 7
- 238000005452 bending Methods 0.000 abstract description 20
- 230000003014 reinforcing effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
Abstract
The invention relates to the technical field of optical fibers, in particular to a macrobend-resistant butterfly-shaped optical cable capable of being used for FTTR and POLAN, which comprises an optical fiber, a first reinforcing steel wire, a second reinforcing steel wire and a protective sleeve rubber with a butterfly-shaped cross section, wherein the optical fiber, the first reinforcing steel wire and the second reinforcing steel wire are embedded in the protective sleeve rubber in parallel, and an axle center connecting line of the optical fiber, the first reinforcing steel wire and the second reinforcing steel wire in the same cross section is in an isosceles triangle shape. The invention provides a macrobend-resistant butterfly-shaped optical cable which can be used for FTTR and POLAN, and adopts a butterfly-shaped protective sleeve rubber and two reinforcing steel wires, when an optical fiber is bent, the bending direction of the optical cable is limited by the two reinforcing steel wires, and when the two reinforcing steel wires are bent, the two reinforcing steel wires cannot directly squeeze or pull a fiber core, so that the fiber core can be better protected.
Description
Technical Field
The invention relates to the technical field of optical fibers, in particular to a macrobend resistant butterfly-shaped optical cable applicable to FTTR and POLAN.
Background
With the continuous development of access networks and FTTH, new requirements are also put on optical fibers, and conventional g.652 single-mode fibers, which are used in large quantities, cannot completely meet the use requirements in certain occasions. In particular In FTTH Multi-Dwelling Unit (MDU) and In-HomeWiring systems, there is an increasing demand for bend loss, which manufacturers and customers have taken into account for the need to reduce bend radius to 5 mm. Therefore, considering the bending performance of the optical fiber, two points must be considered, namely, low bending additional loss and mechanical reliability under a small bending radius.
Macrobend loss of an optical fiber refers to the loss caused by bending along the axis of the fiber. When the light beam propagates in the axial direction of the optical fiber, a critical angle is formed between the light beam and the interface of the core/package; when the propagation angle formed at the core/cladding boundary where the light beam strikes the bent portion of the optical fiber is greater than a critical value, as a result of which the total internal reflection condition is not satisfied in the bent optical fiber, a part of the light beam escapes from the core of the optical fiber. Therefore, the optical fiber is bent to generate a loss of optical power, and the optical power transmitted to the other end is smaller than the optical power emitted from the light source into the optical fiber.
In the actual operation environment of indoor wiring, a wiring corner is inevitably formed, so that loss of optical power at an optical fiber corner is reduced, on one hand, reasonable planning is performed when a wire slot is formed, and on the other hand, the macrobending resistance of the optical fiber is improved.
In order to improve macrobend resistance of an optical fiber, that is, to improve mechanical reliability at a bending radius, there is a technology in the art of embedding a reinforcing steel wire in an optical fiber sheath, and under the toughness and strength support of the reinforcing steel wire, the mechanical reliability of the optical fiber at a full radius is improved, but since the bending radius of the reinforcing steel wire and the bending radius of the fiber core are different but the lengths are equal when the optical fiber is bent, the reinforcing steel wire can squeeze or pull the fiber core when bending occurs, resulting in reduced service life of the fiber core and possibly damage of the sheath.
Disclosure of Invention
In view of this, the present invention provides a macrobend resistant butterfly optical cable that can be used for FTTR and POLAN, and that uses a butterfly-shaped protective sheath rubber and two reinforcing wires, wherein when an optical fiber is bent, the bending direction of the optical cable is limited by the two reinforcing wires, and when the two reinforcing wires are bent, the two reinforcing wires do not directly squeeze or pull the fiber core, so that the fiber core can be better protected.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the invention provides a macrobend-resistant butterfly-shaped optical cable which can be used for FTTR and POLAN, and comprises an optical fiber, a first reinforcing steel wire, a second reinforcing steel wire and a protective sleeve rubber with a butterfly-shaped cross section, wherein the optical fiber, the first reinforcing steel wire and the second reinforcing steel wire are embedded in the protective sleeve rubber in parallel, and the axis connecting lines of the optical fiber, the first reinforcing steel wire and the second reinforcing steel wire at the same cross section are isosceles triangles.
In the above-mentioned macrobend-resistant butterfly-shaped optical cable that can be used to FTTR and POLAN, as the preferred scheme, the protective layer rubber is including first butterfly-shaped sheath, second butterfly-shaped sheath and tearing mouth, tearing mouth has two and all is triangle-shaped, sets up respectively first butterfly-shaped sheath with the junction of second butterfly-shaped sheath both sides, first reinforcing wire sets up in the first butterfly-shaped sheath, the second reinforcing wire sets up in the second butterfly-shaped sheath, the optic fibre axle center is located both sides tear mouthful connecting line.
In the above-mentioned macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, as a preferable solution, the distances between the first reinforcing steel wire and the outer side of the first butterfly sheath and the distances between the second reinforcing steel wire and the outer side of the second butterfly sheath are the same and are R 1, and the axial distance between the first reinforcing steel wire and the second reinforcing steel wire is L 1, where L 1＞2R1.
In the above-mentioned macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, preferably, on the same cross section, the angle range of the connection line between the axes of the optical fibers and the axes of the first reinforcing steel wire and the second reinforcing steel wire is 140±5°.
In the above-mentioned macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, as a preferable solution, the distances between the first reinforcing steel wire and the outer side of the first butterfly sheath and the distances between the second reinforcing steel wire and the outer side of the second butterfly sheath are the same and are R 2, and the axial distance between the first reinforcing steel wire and the second reinforcing steel wire is L 2, where L 2＝2R2.
In the above-mentioned macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, preferably, on the same cross section, the angle range of the connection line between the axes of the optical fibers and the axes of the first reinforcing steel wire and the second reinforcing steel wire is 130±5°.
In the above-mentioned macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, as a preferable solution, the distances between the first reinforcing steel wire and the outer side of the first butterfly sheath and the distances between the second reinforcing steel wire and the outer side of the second butterfly sheath are the same and are R 3, and the axial distance between the first reinforcing steel wire and the second reinforcing steel wire is L 3, where L 3＜2R3.
In the above-mentioned macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, preferably, on the same cross section, the angle range of the connection line between the axes of the optical fibers and the axes of the first reinforcing steel wire and the second reinforcing steel wire is 120±5°.
In the above-mentioned macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, preferably, the optical fiber includes a fiber core and an aramid yarn layer, the aramid yarn layer is wrapped around the fiber core, and the tear port is wrapped around the aramid yarn layer.
In the above-mentioned macrobend resistant butterfly optical cable which can be used in FTTR and POLAN, preferably, the outer surface of the fiber core is provided with a coating layer.
The invention provides a macrobend resistant butterfly optical cable which can be used for FTTR and POLAN, and has the following beneficial effects:
1. The invention provides a macrobending resistant butterfly-shaped optical cable which can be used for FTTR and POLAN, wherein a butterfly-shaped protective sleeve rubber and two reinforcing steel wires are adopted, when the optical cable is bent, the bending direction of the optical cable is limited by the two reinforcing steel wires, and due to dislocation arrangement, the two reinforcing steel wires can not directly squeeze or pull a fiber core when being bent, so that the fiber core can be better protected;
2. The invention provides a macrobend resistant butterfly optical cable which can be used for FTTR and POLAN, wherein fiber cores, first reinforcing steel wires and second reinforcing steel wires are distributed in an isosceles triangle, the optical cable has certain bending capability in other directions besides bending in the direction perpendicular to the axis connecting line of the two reinforcing steel wires, for example, the optical cable is parallel to the axis connecting line direction of the two reinforcing steel wires, and can better adapt to complex indoor optical fiber wiring environments;
3. The invention provides a macrobend-resistant butterfly-shaped optical cable which can be used for FTTR and POLAN, when an indoor wiring optical cable is bent, a reinforcing steel wire can play a supporting role on an optical fiber, the bending angle of the optical cable at a corner and other positions is increased, macrobend is avoided, and therefore loss of the optical fiber in the optical cable when signals are transmitted is reduced.
Drawings
FIG. 1 is a schematic diagram of the general structure of a first implementation of a first embodiment of the present invention that may be used with FTTR and POLAN macrobend resistant butterfly cables;
FIG. 2 is a schematic cross-sectional view of a first embodiment of a first type of macrobend resistant butterfly cable useful in FTTR and POLAN provided by an example of the invention;
FIG. 3 is a schematic diagram of the general structure of a second implementation of a macrobend resistant butterfly cable useful in FTTR and POLAN provided by an example of the invention;
FIG. 4 is a schematic cross-sectional view of a second embodiment of a macrobend resistant butterfly cable useful in FTTR and POLAN provided by an example of the invention;
FIG. 5 is a schematic diagram of the general structure of a third implementation of a macrobend resistant butterfly cable useful in FTTR and POLAN provided by an example of the invention;
FIG. 6 is a schematic cross-sectional view of a third embodiment of a butterfly cable according to an embodiment of the invention, useful for FTTR and POLAN macrobend resistant cables;
fig. 7 is a schematic cross-sectional view of a fourth embodiment of a macrobend resistant butterfly cable useful in FTTR and POLAN according to an example of the invention.
Reference numerals illustrate:
1. A first butterfly sheath; 2. a second butterfly sheath; 3. tearing the mouth; 4. a first reinforcing steel wire; 5. a second reinforcing steel wire; 6. a fiber core; 7. a coating layer; 8. an aramid yarn layer.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 some embodiments of the present invention, but 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.
The following description is made in connection with specific cases, and as shown in fig. 1 to fig. 6, the specific embodiment of the present invention provides a macrobending resistant butterfly optical cable that may be used in FTTR and POLAN, and includes an optical fiber, a first reinforcing steel wire 4, a second reinforcing steel wire 5, and a protective sheath rubber with a butterfly cross section, where the optical fiber, the first reinforcing steel wire 4, and the second reinforcing steel wire 5 are embedded in parallel in the protective sheath rubber, and an axis connecting line of the optical fiber, the first reinforcing steel wire 4, and the second reinforcing steel wire 5 in the same cross section is isosceles triangle.
In the above-mentioned macrobend-resistant butterfly-shaped optical cable that can be used to FTTR and POLAN, as an optimized scheme, the protective layer rubber is including first butterfly-shaped sheath 1, second butterfly-shaped sheath 2 and tearing mouth 3, tearing mouth 3 has two and all is triangle-shaped, sets up respectively first butterfly-shaped sheath 1 with the junction of second butterfly-shaped sheath 2 both sides, first reinforcing wire 4 sets up in the first butterfly-shaped sheath 1, second reinforcing wire 5 sets up in the second butterfly-shaped sheath 2, the optic fibre axle center is located both sides tear mouth 3 link.
Referring to fig. 1 and 2, fig. 1 and 2 are a schematic general structure and a schematic cross-sectional structure of a first implementation of a first macrobending resistant butterfly optical cable applicable to FTTR and POLAN according to an embodiment of the present invention; in the above-mentioned macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, preferably, the distances between the first reinforcing steel wires 4 and the outer sides of the first butterfly sheath 1 and the second reinforcing steel wires 5 and the outer sides of the second butterfly sheath 2 are the same and are R 1, and the axial distance between the first reinforcing steel wires 4 and the second reinforcing steel wires 5 is L 1, where L 1＞2R1.
In the foregoing macrobend-resistant butterfly optical cable that may be used in FTTR and POLAN, preferably, on the same cross section, the angle range between the axes of the optical fibers and the axes of the first reinforcing steel wire 4 and the second reinforcing steel wire 5 is 140±5°, where the angle range is a 1.
In the first embodiment of the invention, the aspect ratio of the cross section of the optical cable is smaller, the bending direction of the optical cable is more inclined to the direction perpendicular to the axis connecting line of the first reinforcing steel wire 4 and the second reinforcing steel wire 5, and the bending capability in the direction parallel to the axis connecting line of the first reinforcing steel wire 4 and the second reinforcing steel wire 5 is smaller, so that the optical cable is suitable for the wiring environment with less 90-degree rotation angle and single rotation angle direction.
Referring to fig. 3 and 4, fig. 3 and 4 are a schematic general structure and a schematic cross-sectional structure of a second implementation of a macrobend resistant butterfly cable applicable to FTTR and POLAN according to an example of the present invention, respectively; in the above-mentioned macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, preferably, the distances between the first reinforcing steel wires 4 and the outer sides of the first butterfly sheath 1 and the second reinforcing steel wires 5 and the outer sides of the second butterfly sheath 2 are the same and are R 2, and the axial distance between the first reinforcing steel wires 4 and the second reinforcing steel wires 5 is L 2, where L 2＝2R2.
In the foregoing macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, preferably, on the same cross section, the angle range between the axes of the optical fibers and the axes of the first reinforcing steel wires 4 and the second reinforcing steel wires 5 is 130±5°, where the angle range is a 2.
In the second embodiment of the invention, the aspect ratio of the section of the optical cable is moderate, the bending direction of the optical cable is still more biased to be perpendicular to the axis connecting direction of the first reinforcing steel wire 4 and the second reinforcing steel wire 5, but the bending capability of the optical cable in the axis connecting direction parallel to the first reinforcing steel wire 4 and the second reinforcing steel wire 5 is improved, and the optical cable is suitable for a wiring environment with less 90-degree rotation angle and 90-degree rotation angle in different directions.
Referring to fig. 5 and 6, fig. 5 and 6 are a schematic general structure and a schematic cross-sectional structure of a third implementation of a macrobending resistant butterfly optical cable applicable to FTTR and POLAN according to an example of the present invention; in the above-mentioned macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, preferably, the distances between the first reinforcing steel wires 4 and the outer sides of the first butterfly sheath 1 and the second reinforcing steel wires 5 and the outer sides of the second butterfly sheath 2 are the same and are R 3, and the axial distance between the first reinforcing steel wires 4 and the second reinforcing steel wires 5 is L 3, where L 3＜2R3.
In the foregoing macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, preferably, on the same cross section, the angle range between the axes of the optical fibers and the axes of the first reinforcing steel wires 4 and the second reinforcing steel wires 5 is 120±5°, where the angle range is defined by the angle range a 3.
In the third embodiment of the invention, the aspect ratio of the section of the optical cable is large, and the bending direction of the optical cable is perpendicular to the axis connecting direction of the first reinforcing steel wire 4 and the second reinforcing steel wire 5 or parallel to the axis connecting direction of the first reinforcing steel wire 4 and the second reinforcing steel wire 5, so that the optical cable has certain degree of better bending capability and is suitable for a wiring environment with more 90-degree corners, more 90-degree corners in different directions and complicated directions.
Referring to fig. 7, fig. 7 is a schematic cross-sectional structure diagram of a fourth implementation of the FTTR and POLAN macrobend resistant butterfly cable according to an embodiment of the present invention; in the above-mentioned macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, as a preferred solution, the optical fiber includes a fiber core 6 and an aramid yarn layer 8, the aramid yarn layer 8 is wrapped around the fiber core 6, and the tear port 3 is wrapped around the aramid yarn layer 8. The aramid yarn may be disposed around the fiber core 6 in a woven manner, thereby protecting the fiber core 6 to some extent.
In the above-mentioned macrobend resistant butterfly optical cable which can be used in FTTR and POLAN, the outer surface of the core 6 is preferably provided with a coating layer 7. The coating layer 7 is mainly used for improving the total reflection efficiency of an optical signal when the fiber core 6 propagates, PMMA material can be dissolved in methyl methacrylate to form coating liquid with larger viscosity when the coating layer 7 is coated, and the coating layer is coated on the fiber core 6, or paint with good light reflection performance and no influence on the physicochemical property of the fiber core 6 can be used.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The foregoing has outlined rather broadly the more detailed description of the invention in order that the detailed description of the invention that follows may be better understood, and in order that the present principles and embodiments may be better understood; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the idea of the present invention, the present disclosure should not be construed as limiting the present invention in summary.
Claims (3)
1. The utility model provides a can be used to FTTR and POLAN anti macrobend butterfly-shaped optical cable, its characterized in that includes optic fibre, first steel wire, second steel wire and the protective sheath rubber that the transversal personally submits butterfly, optic fibre, first steel wire and second steel wire are strengthened the parallel embedding of steel wire and are established in protective sheath rubber, optic fibre, first steel wire and second steel wire be isosceles triangle in the axle center line of same cross section;
The protective sleeve rubber comprises a first butterfly-shaped sheath, a second butterfly-shaped sheath and tearing openings, wherein the two tearing openings are triangular and are respectively arranged at the joints of the two sides of the first butterfly-shaped sheath and the two sides of the second butterfly-shaped sheath, the first reinforcing steel wire is arranged in the first butterfly-shaped sheath, the second reinforcing steel wire is arranged in the second butterfly-shaped sheath, and the axes of the optical fibers are positioned on the connecting lines of the tearing openings at the two sides;
The distances between the first reinforcing steel wire and the outer side of the first butterfly-shaped sheath and the distances between the second reinforcing steel wire and the outer side of the second butterfly-shaped sheath are the same and are all R1, the axial distance between the first reinforcing steel wire and the second reinforcing steel wire are L1, wherein L1 is more than 2R1,
On the same cross section, the angle range of an included angle A1 between the axis of the optical fiber and the axis connecting line of the first reinforcing steel wire and the axis connecting line of the second reinforcing steel wire is 140+/-5 degrees;
the distances between the first reinforcing steel wire and the outer side of the first butterfly sheath and the distances between the second reinforcing steel wire and the outer side of the second butterfly sheath are the same and are all R2, the axial distance between the first reinforcing steel wire and the second reinforcing steel wire are L2, wherein L2=2R2,
On the same cross section, the angle range of an included angle A2 between the axis of the optical fiber and the axis connecting line of the first reinforcing steel wire and the axis connecting line of the second reinforcing steel wire is 130+/-5 degrees;
The distances between the first reinforcing steel wire and the outer side of the first butterfly-shaped sheath and the distances between the second reinforcing steel wire and the outer side of the second butterfly-shaped sheath are the same and are all R3, the axial distance between the first reinforcing steel wire and the second reinforcing steel wire is L3, wherein L3 is less than 2R3,
On the same cross section, the angle range of the included angle A3 between the optical fiber axis and the connecting line of the first reinforcing steel wire and the second reinforcing steel wire axis is 120+/-5 degrees.
2. The macrobend resistant butterfly fiber optic cable of claim 1, wherein the optical fiber comprises a core and an aramid yarn layer, the aramid yarn layer being disposed about the core and the tear port being disposed about the aramid yarn layer.
3. The macrobend resistant butterfly cable of claim 2, wherein the outer surface of the core is provided with a coating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210719568.3A CN115220164B (en) | 2022-06-23 | Macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210719568.3A CN115220164B (en) | 2022-06-23 | Macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115220164A CN115220164A (en) | 2022-10-21 |
| CN115220164B true CN115220164B (en) | 2024-07-16 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383486A (en) * | 2013-08-07 | 2013-11-06 | 江苏中天科技股份有限公司 | Armored pipeline butterfly optical cable and production method thereof |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383486A (en) * | 2013-08-07 | 2013-11-06 | 江苏中天科技股份有限公司 | Armored pipeline butterfly optical cable and production method thereof |
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