CN115220164A - Macrobend-resistant butterfly-shaped optical cable applicable to FTTR (fiber to the radio transmitter and receiver) and POLAN (local area network) - Google Patents
Macrobend-resistant butterfly-shaped optical cable applicable to FTTR (fiber to the radio transmitter and receiver) and POLAN (local area network) Download PDFInfo
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- CN115220164A CN115220164A CN202210719568.3A CN202210719568A CN115220164A CN 115220164 A CN115220164 A CN 115220164A CN 202210719568 A CN202210719568 A CN 202210719568A CN 115220164 A CN115220164 A CN 115220164A
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- 230000003287 optical effect Effects 0.000 title claims abstract description 75
- 239000000835 fiber Substances 0.000 title claims abstract description 37
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 104
- 239000013307 optical fiber Substances 0.000 claims abstract description 45
- 230000001681 protective effect Effects 0.000 claims abstract description 11
- 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 6
- 239000011241 protective layer Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims 10
- 239000010959 steel Substances 0.000 claims 10
- 238000005452 bending Methods 0.000 abstract description 18
- 238000010586 diagram Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 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
- 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
- 230000003071 parasitic effect Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/443—Protective covering
- G02B6/4432—Protective covering with fibre reinforcements
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- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
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 (fiber to the Home) and POLAN (local area network), 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 the axis connecting lines of the optical fiber, the first reinforcing steel wire and the second reinforcing steel wire on the same cross section are in an isosceles triangle shape. The invention provides a macrobend-resistant butterfly-shaped optical cable for FTTR (fiber to the television) and POLAN (local area network), which adopts a butterfly-shaped protective sleeve rubber and two reinforcing steel wires, wherein 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 fiber core cannot be directly extruded or drawn, 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 put on optical fibers, and the traditional G.652 single-mode optical fiber used in large quantity cannot completely meet the use requirements in some occasions. Especially In Multi-Dwelling Unit (MDU) and In-house wiring (In-home) systems of FTTH, increasingly higher demands are being made on the index of bending loss, and manufacturers and customers have considered the need to reduce the bending radius to 5 mm. Thus, when considering the bending performance of the optical fiber, two considerations must be considered, namely low bend parasitic loss and mechanical reliability at very small bend radii.
Macrobend loss of an optical fiber refers to loss caused by bending along the axis of the optical 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/the package; when the propagation angle of the light beam at the core/cladding boundary of the bent portion of the fiber is greater than a critical value, the result is that the total internal reflection condition is not met in the bent fiber and a portion of the light beam escapes from the core of the fiber. Therefore, the optical fiber is bent to cause 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 and entering the optical fiber.
In the actual operating environment of indoor wiring, the wiring corner can inevitably appear, in order to reduce the optical power loss at the optic fibre corner, rational planning when the wire casing is opened on the one hand, on the other hand improves the anti macrobend ability of optic fibre.
In order to improve macro-bending resistance of an optical fiber, namely, improve mechanical reliability at a bending radius, the technology of embedding a reinforcing steel wire in an optical fiber sheath exists in the field, the mechanical reliability of the optical fiber at a full radius is improved under the support of toughness and strength of the reinforcing steel wire, but the bending radii of the reinforcing steel wire and a fiber core are different and the lengths of the reinforcing steel wire and the fiber core are equal when the optical fiber is bent, so that the reinforcing steel wire extrudes or pulls the fiber core when the optical fiber is bent, the service life of the fiber core is reduced, and sheath damage is possibly caused.
Disclosure of Invention
In view of the above, the invention provides a macrobend resistant butterfly optical cable for FTTR and POLAN, which adopts a butterfly 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 fiber core is not directly extruded or pulled, so that the fiber core can be better protected.
In order to achieve the purpose, the invention is realized by the following technical scheme: the invention provides a macrobend-resistant butterfly-shaped optical cable applicable to FTTR (fiber to the Top) and POLAN (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 the axis connecting lines of the optical fiber, the first reinforcing steel wire and the second reinforcing steel wire on the same cross section are in an isosceles triangle shape.
In the macrobending-resistant butterfly-shaped optical cable applicable to FTTR and POLAN, as a preferred scheme, the protective layer rubber includes a first butterfly-shaped sheath, a second butterfly-shaped sheath and two tear notches, the two tear notches are triangular and are respectively disposed at a connection position at two sides of the first butterfly-shaped sheath and the second butterfly-shaped sheath, the first reinforcing steel wire is disposed in the first butterfly-shaped sheath, the second reinforcing steel wire is disposed in the second butterfly-shaped sheath, and an axis of the optical fiber is located on a connection line of the tear notches at two sides.
Anti-macro for FTTR and POLAN as described aboveIn the bent butterfly-shaped optical cable, as a preferred scheme, the distances between the first reinforcing steel wire and the outer side of the first butterfly-shaped sheath and between the second reinforcing steel wire and the outer side of the second butterfly-shaped sheath are the same and are R 1 The distance between the first reinforcing steel wire and the second reinforcing steel wire is L 1 Wherein, L 1 ＞2R 1 。
In the above macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN, as an optimal solution, on the same cross section, the included angle a between the optical fiber axis and the axis connecting line of the first reinforcing steel wire and the second reinforcing steel wire is respectively 1 Is 140 ± 5 °.
In the macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN, preferably, the distances between the first reinforcing steel wire and the outer side of the first butterfly-shaped sheath and between the second reinforcing steel wire and the outer side of the second butterfly-shaped sheath are the same and are both R 2 The distance between the first reinforcing steel wire and the second reinforcing steel wire is L 2 Wherein L is 2 ＝2R 2 。
In the macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN, as a preferred scheme, on the same cross section, the optical fiber axis forms an included angle a with a line connecting axes of the first reinforcing steel wire and the second reinforcing steel wire respectively 2 Is 130 ± 5 °.
In the above macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN, preferably, the distances between the first reinforcing steel wire and the outside of the first butterfly-shaped sheath and between the second reinforcing steel wire and the outside of the second butterfly-shaped sheath are the same and are both R 3 The distance between the first reinforcing steel wire and the second reinforcing steel wire is L 3 Wherein L is 3 ＜2R 3 。
In the above macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN, as an optimal solution, on the same cross section, the included angle a between the optical fiber axis and the axis connecting line of the first reinforcing steel wire and the second reinforcing steel wire is respectively 3 Is 120 + -5 deg..
In the above macrobending resistant butterfly optical cable applicable to FTTR and POLAN, as a preferred solution, 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 notch is wrapped around the aramid yarn layer.
In the macrobending resistant butterfly optical cable applicable to FTTR and POLAN, preferably, the outer surface of the fiber core is provided with a coating layer.
The invention provides an anti-macrobending butterfly-shaped optical cable for FTTR and POLAN, which has the following beneficial effects:
1. the invention provides a macrobend-resistant butterfly-shaped optical cable capable of being used for FTTR (fiber to the television) and POLAN (fiber to the Internet), which adopts a butterfly-shaped protective sleeve rubber and two reinforcing steel wires, wherein when the optical cable is bent, the bending direction of the optical cable is limited by the two reinforcing steel wires;
2. the invention provides an anti-macrobending butterfly-shaped optical cable capable of being used for FTTR (fiber to the Top) and POLAN (Point-to-Point) and an anti-macrobending butterfly-shaped optical cable, wherein a fiber core, a first reinforcing steel wire and a second reinforcing steel wire are distributed in an isosceles triangle shape, and the optical cable has certain capability of being bent towards other directions besides being bent towards the direction vertical to the connecting line of the axes of the two reinforcing steel wires, for example, the optical cable is parallel to the connecting line of the axes of the two reinforcing steel wires, so that the optical cable can better adapt to the complex indoor optical fiber wiring environment;
3. the invention provides a macrobend-resistant butterfly-shaped optical cable capable of being used for FTTR (fiber to the television) and POLAN (local area network), wherein when an indoor wiring optical cable is bent, a reinforcing steel wire can support optical fibers, so that the bending angle of the optical cable at the corner and other positions is increased, macrobending is avoided, and thus the loss of the optical fibers in the optical cable during signal transmission is reduced.
Drawings
Fig. 1 is a schematic general structural diagram of a first implementation of an anti-macrobend butterfly optical cable that can be used in FTTR and POLAN according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure diagram of a first implementation of an anti-macrobending butterfly optical cable that can be used in FTTR and POLAN according to an embodiment of the present invention;
fig. 3 is a schematic general structural diagram of a second implementation of an anti-macrobend butterfly optical cable that can be used in FTTR and POLAN according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional structure diagram of a second implementation manner of an anti-macrobending butterfly optical cable that can be used in FTTR and POLAN according to an embodiment of the present invention;
fig. 5 is a schematic general structural diagram of a third implementation of an anti-macrobend butterfly optical cable that can be used in FTTR and POLAN according to an embodiment of the present invention;
fig. 6 is a schematic cross-sectional structure diagram of a third implementation of an anti-macrobending butterfly optical cable that can be used in FTTR and POLAN according to an embodiment of the present invention;
fig. 7 is a schematic cross-sectional structure diagram of a fourth implementation manner of an anti-macrobending butterfly optical cable that can be used in FTTR and POLAN according to an embodiment of the present invention.
Description of the reference numerals:
1. a first butterfly-shaped sheath; 2. a second butterfly-shaped sheath; 3. a tear opening; 4. a first reinforcing steel wire; 5. a second reinforcing steel wire; 6. a core; 7. a coating layer; 8. and an aramid yarn layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments 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 drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 6, an embodiment of the present invention provides an optical fiber cable with macro-bending resistance for FTTR and POLAN, including an optical fiber, a first reinforcing steel wire 4, a second reinforcing steel wire 5, and a protective sheath rubber with a cross section in a butterfly shape, where the optical fiber, the first reinforcing steel wire 4, and the second reinforcing steel wire 5 are embedded in the protective sheath rubber in parallel, and a connection line of axes of the optical fiber, the first reinforcing steel wire 4, and the second reinforcing steel wire 5 in the same cross section is in an isosceles triangle shape.
In the macrobending resistant butterfly-shaped optical cable applicable to FTTR and POLAN, as a preferable scheme, the protective layer rubber includes a first butterfly-shaped sheath 1, a second butterfly-shaped sheath 2 and a tear notch 3, two tear notches 3 are both triangular and are respectively disposed at a connection position at two sides of the first butterfly-shaped sheath 1 and the second butterfly-shaped sheath 2, the first reinforcing steel wire 4 is disposed in the first butterfly-shaped sheath 1, the second reinforcing steel wire 5 is disposed in the second butterfly-shaped sheath 2, and an axis of the optical fiber is located on a connection line of the tear notches 3 at two sides.
Referring to fig. 1 and fig. 2, fig. 1 and fig. 2 are a schematic general structural diagram and a schematic cross-sectional structural diagram of a first implementation of an anti-macrobending butterfly optical cable for FTTR and POLAN according to an embodiment of the present invention; in the above macrobend resistant butterfly-shaped optical cable applicable to FTTR and POLAN, preferably, the distances between the first reinforcing steel wire 4 and the outside of the first butterfly-shaped sheath 1 and between the second reinforcing steel wire 5 and the outside of the second butterfly-shaped sheath 2 are the same and are both R 1 The first reinforcing steel wire 4 and the second reinforcing steel wire 5 have an axial distance of L 1 Wherein L is 1 ＞2R 1 。
In the macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN, as a preferred scheme, on the same cross section, the optical fiber axis forms an included angle a with the axis connecting line of the first reinforcing steel wire 4 and the second reinforcing steel wire 5 respectively 1 Is 140 ± 5 °.
In the first embodiment of the present invention, the aspect ratio of the cross section of the optical cable is small, the bending direction of the optical cable is more deviated to the direction perpendicular to the axis connecting line of the first reinforcing steel wire 4 and the second reinforcing steel wire 5, 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 small, and the optical cable is suitable for a wiring environment with few 90 ° corners and a single corner direction.
Referring to fig. 3 and 4, fig. 3 and 4 are a schematic overall structure diagram and a schematic cross-sectional structure diagram of a second implementation manner of an anti-macrobending butterfly optical cable for FTTR and POLAN according to an embodiment of the present invention, respectively; in the above-mentioned macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, the preferable scheme isThe distances between the first reinforcing steel wire 4 and the outer side of the first butterfly-shaped sheath 1 and between the second reinforcing steel wire 5 and the outer side of the second butterfly-shaped sheath 2 are the same and are R 2 The first reinforcing steel wire 4 and the second reinforcing steel wire 5 have an axial distance of L 2 Wherein, L 2 ＝2R 2 。
In the above macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN, as an optimal solution, on the same cross section, the included angle a between the axis of the optical fiber and the axis connecting line of the first reinforcing steel wire 4 and the second reinforcing steel wire 5 is respectively 2 Is 130 ± 5 °.
In the second embodiment of the present invention, the aspect ratio of the cross section of the optical cable is moderate, the bending direction of the optical cable is still 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, but the bending capability of the optical cable parallel to the axis connecting line of 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 90 ° corners in different directions but with less 90 ° corners.
Referring to fig. 5 and 6, fig. 5 and 6 are a schematic overall structure diagram and a schematic cross-sectional structure diagram of a third implementation manner of an anti-macrobending butterfly optical cable for FTTR and POLAN according to an embodiment of the present invention, respectively; in the above macrobend resistant butterfly-shaped optical cable applicable to FTTR and POLAN, preferably, the distances between the first reinforcing steel wire 4 and the outside of the first butterfly-shaped sheath 1 and between the second reinforcing steel wire 5 and the outside of the second butterfly-shaped sheath 2 are the same and are both R 3 The first reinforcing steel wire 4 and the second reinforcing steel wire 5 have an axial distance of L 3 Wherein L is 3 ＜2R 3 。
In the above macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN, as an optimal solution, on the same cross section, the included angle a between the axis of the optical fiber and the axis connecting line of the first reinforcing steel wire 4 and the second reinforcing steel wire 5 is respectively 3 Is 120 + -5 deg.
In the third embodiment of the present invention, the aspect ratio of the cross section of the optical cable is large, and the bending direction of the optical cable is perpendicular to the axis connecting line direction of the first reinforcing steel wire 4 and the second reinforcing steel wire 5, or parallel to the axis connecting line direction of the first reinforcing steel wire 4 and the second reinforcing steel wire 5, and the optical cable has a certain degree of good bending capability, and is suitable for a wiring environment with more 90-degree corners, more 90-degree corners in different directions, more corners and complex directions.
Referring to fig. 7, fig. 7 is a schematic cross-sectional structure diagram of a fourth implementation manner of an anti-macrobending butterfly optical cable that can be used in FTTR and POLAN according to an embodiment of the present invention; in the macrobend-resistant butterfly optical cable applicable to FTTR and POLAN, preferably, 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 notch 3 is wrapped around the aramid yarn layer 8. The aramid yarn can be arranged on the periphery of the fiber core 6 in a weaving mode, and the fiber core 6 is protected to a certain extent.
In the macrobending resistant butterfly optical cable applicable to FTTR and POLAN, preferably, the outer surface of the fiber core 6 is provided with a coating layer 7. The coating layer 7 is mainly used for improving the total reflection efficiency of optical signals during propagation of the fiber core 6, and the coating layer 7 can be formed by dissolving PMMA material in methyl methacrylate during coating to form coating liquid with high viscosity, and can be coated on the fiber core 6 or can be coated by paint with good light reflection performance and without influence on the physical and chemical properties of the fiber core 6.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The foregoing detailed description of the embodiments of the present invention has been presented for purposes of illustration and description, and is intended to be exemplary only and is not intended to be exhaustive or to limit the invention to the precise forms disclosed; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. The utility model provides an anti macrobend butterfly-shaped optical cable that can be used to FTTR and POLAN, its characterized in that includes optic fibre, first enhancement steel wire, second enhancement steel wire and transversal butterfly-shaped protective sheath rubber of personally submitting, optic fibre first enhancement steel wire with the second is strengthened the parallel inlays of steel wire and is established in the protective sheath rubber, optic fibre first enhancement steel wire with the second is strengthened the axle center line of steel wire at same cross section and is isosceles triangle.
2. The macrobend-resistant butterfly optical cable for FTTR and POLAN according to claim 1, wherein said protective layer rubber comprises a first butterfly-shaped sheath, a second butterfly-shaped sheath and two tearing openings, wherein said tearing openings are triangular and are respectively disposed at the connection positions of two sides of said first butterfly-shaped sheath and said second butterfly-shaped sheath, said first reinforcing steel wire is disposed in said first butterfly-shaped sheath, said second reinforcing steel wire is disposed in said second butterfly-shaped sheath, and said optical fiber axis is located on the connection line of said tearing openings at two sides.
3. The FTTR and POLAN macrobend resistant butterfly optical cable of claim 2, wherein the first strength steel wire is the same distance from the outside of the first butterfly sheath and the second strength steel wire is the same distance from the outside of the second butterfly sheath and both are R 1 The distance between the first reinforcing steel wire and the second reinforcing steel wire is L 1 Wherein L is 1 ＞2R 1 。
4. The FTTR and POLAN macrobend-resistant butterfly optical cable according to claim 3, wherein, on the same cross section, the optical fiber axis forms an included angle A with the axis connecting line of the first reinforcing steel wire and the second reinforcing steel wire respectively 1 Is 140 ± 5 °.
5. The macrobend resistant butterfly optical cable for FTTR and POLAN according to claim 2, wherein the distance between the first reinforcing steel wire and the outside of the first butterfly sheath and the distance between the second reinforcing steel wire and the outside of the second butterfly sheath are the same and both R 2 The distance between the first reinforcing steel wire and the second reinforcing steel wire is L 2 Wherein L is 2 ＝2R 2 。
6. The FTTR and POLAN macrobend resistant butterfly optical cable of claim 5, wherein in the same cross section, the optical fiber axis forms an angle A with the line connecting the axes of the first and second reinforcing steel wires 2 Is 130 ± 5 °.
7. The FTTR and POLAN macrobend resistant butterfly optical cable of claim 2, wherein the first strength steel wire is the same distance from the outside of the first butterfly sheath and the second strength steel wire is the same distance from the outside of the second butterfly sheath and both are R 3 The distance between the first reinforcing steel wire and the second reinforcing steel wire is L 3 Wherein L is 3 ＜2R 3 。
8. The FTTR and POLAN macrobend resistant butterfly optical cable of claim 7, wherein in the same cross section, the optical fiber axis forms an angle A with the line connecting the axes of the first and second reinforcing steel wires 3 Is 120 + -5 deg.
9. An FTTR and POLAN macrobend resistant butterfly optical cable as claimed in claim 2, wherein said optical fiber includes a core and a layer of aramid yarn, said aramid yarn layer being wrapped around said core and said tear notch being wrapped around said aramid yarn layer.
10. An FTTR and POLAN macrobend resistant butterfly cable as claimed in claim 9, wherein the outer core surface is provided with a coating layer.
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| CN202210719568.3A CN115220164B (en) | 2022-06-23 | 2022-06-23 | Macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN |
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| CN202210719568.3A CN115220164B (en) | 2022-06-23 | 2022-06-23 | Macrobend-resistant butterfly-shaped optical cable applicable to FTTR and POLAN |
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| CN110148485A (en) * | 2019-05-21 | 2019-08-20 | 优易电缆(张家港)有限公司 | A kind of high flexibility anti-torsion robot cable |
| CN211529662U (en) * | 2020-03-03 | 2020-09-18 | 天津有容蒂康通讯技术有限公司 | Photoelectric composite cable |
| CN212010484U (en) * | 2020-07-01 | 2020-11-24 | 河南庆州电缆有限公司 | Water-blocking cable |
| CN113534370A (en) * | 2021-06-16 | 2021-10-22 | 华为技术有限公司 | Optical cable |
| CN216287673U (en) * | 2021-11-03 | 2022-04-12 | 重德集团有限公司 | High-temperature-resistant, corrosion-resistant and flame-retardant composite cable |
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