Double Sheath Direct Burial Armored Fiber Optic Cable, as the name suggests, is a type of fiber optic communication cable with a double protective layer (sheath), specifically designed for direct burial underground without the need for additional protective conduits (such as sub-ducts or pipes). Its core design philosophy is to provide extremely high mechanical protection, moisture and corrosion resistance, and long-term reliability to withstand the complex and harsh underground environment.
Double Sheath Direct Burial Fiber Optic Cable: With its double-layered sheath and armored structure, it provides unparalleled physical and environmental protection, specifically designed for long-term, reliable, and maintenance-free direct burial in challenging underground environments. Although the initial cable cost is higher, its superior reliability, long lifespan, and savings on conduit costs make it an indispensable choice for critical infrastructure network construction.
Features
Excellent Mechanical Protection:
Compression Resistance: Withstands soil pressure, rock compression, and impact during construction backfilling.
Impact Resistance:
Prevents accidental damage from digging tools (such as shovels and picks).
Tensile Strength:
Maintains fiber optic cable integrity during laying and soil movement.
Rodent Resistance:
The armored layer effectively prevents damage from rodents such as rats and moles.
Excellent Moisture and Water Resistance:
The double sheath and intermediate armor/moisture barrier form multiple moisture barriers.Internal gel filling prevents moisture from spreading longitudinally along the cable. This is crucial for ensuring long-term stability and low attenuation of the fiber in humid underground environments.
Chemical and Environmental Stress Resistance:
The HDPE outer sheath resists corrosion from acids, alkalis, fertilizers, and oils in the soil.Designed to withstand stresses caused by temperature changes and soil movement.
Long Lifespan and High Reliability:
Designed for an underground service life of 20-30 years or even longer, with very low maintenance costs.Suitable for critical infrastructure such as backbone networks, military networks, and power communication systems that require extremely high network availability.
Application:
Long-distance communication trunk lines: Backbone network segments traversing fields, mountainous areas, and riverbeds (requiring additional protection).
Power communication systems: Complementary to OPGW or ADSS cables laid along high-voltage transmission lines, used for connections between substations.
Campuses, industrial parks, and smart cities: Underground main fiber optic cables connecting different buildings or areas.
Harsh environments: Areas with rocky terrain, high humidity, severe rodent infestation, or where heavy machinery may pass.
Other Armored Fiber Optic Cable
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