180 optical fiber cable with 72 cores
A 72-core optical fiber cable typically uses a loose tube or armored design with singlemode fibers (G.652D/G.657A1), suitable for outdoor backbone, FTTx, and LAN applications.
Cable Construction
Most 72-core optical fiber cables are built with six 12-fiber loose tubes, totaling 72 fibers, or with ribbon stacks in a single tube for compact designs . The cable may include:
- Strength members: Aramid yarns or steel rods for tensile strength and anti-buckling support .
- Outer jacket: Polyethylene (PE) for UV resistance and water protection; some cables use LSZH jackets for low-smoke, zero-halogen requirements .
- Armoring: Steel tape or double PE sheaths for crush resistance, rodent protection, and suitability for direct burial .
Fiber Type
- Singlemode fibers: G.652D or G.657A1/A2, optimized for long-distance transmission and bend-insensitive performance .
- Multimode fibers: Available in some models for LAN or short-distance applications .
Mechanical and Installation Properties
- Tensile strength: Short-term ≥ 3000 N for armored designs .
- Crush resistance: ≥ 3000 N/10 cm for steel-armored cables .
- Bending radius: Typically ≥ 20× cable outer diameter (static) to prevent fiber stress .
- Installation suitability: Can be installed in ducts, tunnels, trenches, or direct burial; armored versions provide extra protection in harsh environments .
Applications
- Backbone networks: Campus, industrial, or building backbone links .
- FTTx deployments: Fiber-to-the-home or fiber-to-the-building distribution .
- Data centers and metropolitan networks: High-density fiber connections requiring long-term stability .
- Telecom, cable TV, and broadcast networks: Outdoor and aerial installations .
Summary
A 180-meter 72-core optical fiber cable is typically a singlemode, loose tube or armored cable with robust mechanical protection, suitable for outdoor backbone, FTTx, and LAN applications. It provides high tensile and crush resistance, bend-insensitive fibers, and compliance with ITU-T G.652D/G.657A1, IEC 60794-3, and Telcordia GR-20 standards, ensuring reliable long-term performance .
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