OPTICAL FIBER COMMUNICATION CABLES TYPE OF NON-METAL OR METAL CONDUCTS
Short description:
RECOIN JOINT STOCK COMPANY's non-metallic (CPKL) and metallic (CKL) sewer type fiber optic communication cables use single-mode fiber, placed in a loose tube, filled with moisture-proof oil, and have a moisture barrier. , corrugated steel tape layer, black HDPE shell. Including types with capacities from 2 to 144 fibers, used in sewers for CPKL, CKL cables and direct burial for CKL cables
PRODUCT DESCRIPTION
TECHNICAL STANDARDS FOR OPTICAL CABLES
General introduction
  • RECOIN JOINT STOCK COMPANY's cables are fully compliant with common international standards IEC, EIA, ASTM, national standards TCVN, TCN industry standards or customer standards.
1. CABLE STRUCTURE
2. Simulation of CKL cable structure
3. Technical characteristics of single-mode fiber G 652D
Fiber typeSingle mode, G.652D
Fiber Type

Single mode, G.652D

Mode Field Diameter

9.2 µm/ ±0.5µm

10.4 µm/ ±0.8µm

Cladding Diameter/ Tolerance

125.0µm/ ±1µm

Core Clad Concentricity Error

≤ 0.5µm

Cladding Non-Circularity

≤ 1%

Coating Diameter

245 ± 5µm

Cut-off Wavelength

≤ 1260 nm

Attenuation Coefficient

≤ 0.36 dB/km

≤ 0.35 dB/km

≤ 0.22 dB/km

≤ 0.21 dB/km

Wavelength Dispersion Coefficient

≤ 3.5 ps/nm·km

≤ 18 ps/nm·km

Zero Dispersion Wavelength

1300 nm ≤ l0

≤ 1324 nm

Slope at Zero Dispersion Wavelength

≤ 0.092 ps/nm²·km

Polarization Mode Dispersion Coefficient – Coated Fiber

≤ 0.2 ps/

4. Detailed components of the cable:
  • Fiber Optic
    • The optical fiber used is single-mode fiber G.652D, step refractive index.<br /> The outside of the optical fiber is color-coated (coded) according to TIA/EIA - 598 - A standards.<br /> The primary shell as well as the color ink covering the optical fiber use a material that is resistant to ultraviolet rays (acrylate), minimizing the impact of the external environment and being durable over time.<br /> When welding, the primary shell is easily stripped using specialized equipment, does not require the use of chemicals and does not affect the fibers.<br /> Components of optical fiber such as core, shell, ink... do not conduct electricity.<br /> The standard parameters of optical fibers are specified in the table above.<br /> All the fiber optics used in a cable come from a single fiber optic manufacturer.<br /> The color coding law of optical fibers in the same liquid buffer tube is specified according to the following table:
    Fiber or loose tube serial numberFiber color code or:
    Liquid tube color code
    1Blue
    2Orange
    3Green
    4Brown
    5Grey
    6White
    7Red
    8Black
    9Yellow
    10Violet
    11Pink
    12Light blue/Aqua
  • Central bearing member
    • Central bearing component: Made from non-metallic material FRP (Fiber Reinforce Platic) with uniform circular structure/dimensions, continuous, non-conductive, not connected over the entire length of the cable roll, without any any disability. You can cover the cable with PE plastic if necessary to create an even roundness for the cable.<br /> This component helps prevent the cable and optical fiber from being too stretched and still ensures the cable's flexibility throughout the process from production, transportation, installation, and use.
  • Loose tube (loose buffer tube):
    • Loose tubes are manufactured from Polybutylene Terephthalate (PBT) material, which is non-conductive. Loose tubes in a cable are color coded according to EIA/TIA-598 standards and are specified as in the table below.<br /><br /> This loose tube contains optical fibers inside and is filled with specialized moisture-proof oil (filler). The optical fibers are free and move easily.<br /><br /> The diameter of the loose tube depends on the number of optical fibers in the tube<br /><br /> The number of optical fibers in each loose tube is specified as follows:<br /><br /> – 6 optical fibers/loose tube for ${"<="} 30 s��cable,<br /><br /> – 12 optical fibers/loose tube for cables with 36 fibers or more.
  • Secondary buffer tube
    • In case to form an evenly round cable core with a solid structure but the number of loose tubes is not enough to create an even roundness for the cable, use an additional filler rod (Filler Rod).<br /><br /> This auxiliary buffer tube is made from Polyethylene (PE) plastic with a natural color that does not match the color of any liquid tube and these tubes do not contain optical fibers or any metal components, and are not electrically conductive.
  • Secondary buffer tube
    • In case to form an evenly round cable core with a solid structure but the number of loose tubes is not enough to create an even roundness for the cable, use an additional filler rod (Filler Rod).<br /><br /> This auxiliary buffer tube is made from Polyethylene (PE) plastic with a natural color that does not match the color of any liquid tube and these tubes do not contain optical fibers or any metal components, and are not electrically conductive.
  • Liquid tube filling
    • The spaces between the fiber and the inner surface of the liquid tube lumen are filled with a special compound (Thixotropic Jelly Compound). This compound has the effect of preventing water and moisture penetration into the tube, helping to ensure stable transmission quality.<br /><br /> This filler is not toxic to human health, does not affect other components in the cable as well as the color of the optical fiber. This substance is colorless, odorless, does not mold, and does not conduct electricity.<br /><br /> This filler is non-conductive and has a low coefficient of thermal expansion, ensuring it does not harden at very low temperatures. Does not hinder the movement of fibers in loose tubes.
  • Cable core waterproof component, Cable core coating and waterproof fiber:
    • The cable core is waterproofed and moisture-proof using the dry cable core method (quick desiccant compound - SAP), this compound completely protects the cable core from water as well as moisture from penetrating the cable, ensuring Cable cores are always dry in all environments. The entire cable core waterproof component includes the following 2 components:<br /><br /> Water swellable tape is wound along the entire outside and along the length of the cable core and water swellable yarn is wound around the central load-bearing member and continuously throughout the length of the cable.<br /><br /> These two components ensure absolute prevention of water and moisture penetration into the cable core. This waterproof tape and fiber is non-conductive, insulating, non-flammable and anti-mold.
  • Cable braiding
    • The loose tubes are arranged sequentially along with other components such as auxiliary buffer tubes (filler tubes) if necessary and are twisted SZ in reverse along the axis of the central load-bearing fiber. The above cable core is wound with two polyester yarn binders in opposite directions, with enough tension to ensure the cable core is sturdy, maintaining the order and position of the cable components throughout the production, construction and use process. use.<br /><br /> The braiding steps and excess fiber in the loose tube ensure that the actual fiber excess in the cable compared to the length printed on the cable is guaranteed to be ≥ 1%.
  • Additional reinforcement components (Option – reinforced braided wire):
    • Using many Aramid yarns with very high tension resistance, adding primary reinforcement helps increase the tension resistance of the cable core as well as the cable. These additional reinforcing fibers are placed outside the waterproof tape, arranged evenly and tightly braided to the inner cable core.
  • Inner sheath of the cable (for cables with 2 sheaths):
    • It is a high-quality black carbon-containing HDPE plastic layer that can withstand the impact of ultraviolet rays, contains appropriate antioxidants, is not capable of mold growth, and does not contain metal components.<br /><br /> The shell has a uniform thickness, is evenly round over the entire length of the cable, has uniform quality, is not rough, does not contain air bubbles, is not split, has no cracks, blisters, lumps or any defects. What disability?<br /><br /> Cable sheath thickness: ≥ 1.0mm..
  • The steel band ripples
    • Corrugated steel tape protects the cable from mechanical impacts and rodents. The tape is wound along the entire cable core with the overlap of the steel tape being at least 3 mm.<br /><br /> This steel tape is made from steel material coated with Ethylene arcylic copolymer on both sides..
  • The outer shell of the cable:
    • It is a high-quality black carbon-containing HDPE plastic layer that can withstand the impact of ultraviolet rays, contains appropriate antioxidants, is not capable of mold growth, and does not contain metal components.<br /><br /> The shell has uniform thickness, is evenly rounded over the entire length of the cable, uniform quality, no roughness, no air bubbles, no separation, no cracks, blisters, lumps or any defects. any.<br /><br /> Cable sheath thickness: ≥ 1.5mm.
  • Cable hanger: made of galvanized steel consisting of 7 strands twisted together
    • – Use 7/1.0mm hanging wire for cables with a capacity of up to 72 fibers<br /><br /> – Use 7/1.2mm hanging wire for cables with a capacity of 96 fibers or more