GYTY53 Steel Tape Armored Double Jackets Outdoor Direct Buried Optical Fiber Cable
| Model | GYTY53 |
| Fiber Counts | 2core - 288core |
| Structure | Stranded Loose Tube |
| Central Strength Member (CSM) | Steel Wire |
| Moisture Proof | Cable Filling Compound or Water-blocking Tape |
| Inner Jacket | PE |
| Armor | Corrugated Steel Tape (CST) |
| Outer Jacket | PE |
| Operation Temperature | -40℃~70℃ |
| Application | Underground Direct Buried Iaying |
| Drum Length | 2km, 3km, 4km or customized |
Product Overview:
GYTY53 is a heavy-duty outdoor optical fiber cable specifically designed for direct burial in harsh underground environments. It integrates multiple protective layers and a steel tape armor structure to resist external mechanical damage, moisture, corrosion, and soil pressure—making it a core solution for long-distance, underground optical communication networks.
Detailed Structure of GYTY53 Direct Burial Armored Fiber Optic Cable:
GYTY53 cable structure follows a "layered protection" design, from the inner optical fiber to the outer jacket, ensuring both signal integrity and environmental resistance.
| Layer no. | Component Name | Material & Specifications | Function |
| 1 | Optical Fiber core | Single-mode (e.g., G.652D, G.657A1) or multi-mode (e.g., OM3, OM4) fiber; | Transmit optical signals |
| 2 | Loose Tube | PBT loose tube filled with thixotropic water-blocking gel | Isolates fiber from external stress and moisture |
| 3 | Central Strength Member | High-tensile steel wire (galvanized) or FRP (Fiber Reinforced Plastic) | Bear axial tension (e.g., during laying); prevent cable stretching/deformation |
| 4 | Cable Core Stranding & Filling | Loose tubes stranded around the central strength member; water-blocking yarn/tape wrapped around the cable core | Ensure cable core stability; block water along the cable length (longitudinal water blocking) |
| 5 | Armor layer | Corrugated Steel Tape | Resist lateral pressure (e.g., soil compaction, heavy loads above ground); prevent rodent bites |
| 6 | Double Jackets | Inner PE jacket + Outer PE jacket | Isolate armor from soil (prevent rust); resist UV aging (if exposed temporarily); resist chemical corrosion (e.g., acidic/alkaline soil) |
GYTY53 Cable
GYTY53-96Core
Features of GYTY53 Underground Direct Buried Optical Fiber Cable:
(1) Excellent Environmental Resistance
Waterproof Performance: Achieves "full water blocking" through three layers: loose tube gel (radial water blocking), water-blocking yarn/tape (longitudinal water blocking), and impermeable PE jackets. It can withstand long-term immersion in groundwater or temporary flooding.
Corrosion Resistance: Double PE jackets and galvanized steel tape resist corrosion from acidic/alkaline soil, saltwater (suitable for coastal areas), and underground chemicals (e.g., fertilizer infiltration in farmland).
Aging Resistance: Outer PE jacket is added with anti-UV additives, enabling short-term exposure (e.g., during construction) without performance degradation; service life reaches 20–30 years in normal underground conditions.
(2) Strong Mechanical Protection
Lateral Pressure Resistance: Steel tape armor can withstand lateral pressure up to 10kN/100mm (equivalent to the pressure of a 10-ton vehicle passing above), avoiding cable core damage from soil compaction or heavy loads.
Tension Resistance: Central strength member (e.g., galvanized steel wire) supports tensile force up to 15–30kN, meeting the requirements of mechanical traction during long-distance direct burial (e.g., 100–500m per section).
Rodent & Animal Resistance: Steel tape armor is hard enough to prevent gnawing by rodents (e.g., moles, rats) or burrowing animals—an essential feature for underground cables in rural or suburban areas.
(3) Stable Signal Transmission
The loose tube structure isolates optical fibers from external mechanical stress (stretching, bending), ensuring the fiber's attenuation coefficient (e.g., ≤0.36dB/km at 1310nm for G.652D fiber) remains stable over long-term operation.
The cable's minimum bending radius (static: 10×cable diameter; dynamic: 20×cable diameter) allows flexible laying around obstacles (e.g., underground pipes) without damaging fibers.
(4) Cost-Effective & Easy to Construct
Direct burial design eliminates the need for expensive protective pipes (e.g., PVC or HDPE pipes), reducing engineering costs by 30–50% compared to "cable + pipe" solutions.
Lightweight (compared to double armored cables like GYTA53) and flexible, suitable for manual or mechanical laying in various terrains (flat ground, hillsides, farmland).
Applications:
Deployed as underground backbone cables between telecommunication exchanges (e.g., connecting municipal-level to county-level exchanges) or as access cables for "Fiber to the Home (FTTH)" in residential areas (buried under roads or green belts to connect to distribution boxes).
Buried in farmland, orchards, or mountainous areas to provide broadband access to rural households. Resists damage from agricultural machinery (e.g., tractors) and rodent gnawing, adapting to harsh rural environments.
Laid in industrial parks (buried under factory roads) to connect production workshops, monitoring systems, and data centers; resistant to chemical corrosion from industrial wastewater.
Used in coastal areas (buried in saltwater-affected soil) for marine monitoring or coastal city communication networks, with anti-salt corrosion performance.
Integrated into municipal construction projects (e.g., road expansion, subway construction) as underground optical cables for traffic signal control, public security monitoring, and smart city data transmission.
1. Structure Parameter
| Model | GYTY53 | ||||||||
| Fiber Type | G652D G655 G657 50/125 62.5/125 | ||||||||
| Fiber Counts | 2-30 | 32-36 | 38-60 | 62-72 | 74-96 | 98-120 | 122-144 | 146-216 | 218-288 |
| Max. fibers per tube | 6 | 6 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Units (Tubes or Fillers) | 6 | 6 | 5 | 6 | 8 | 10 | 12 | 18 | 24 |
| Cable Diameter（mm） | 12.1 | 12.1 | 12.4 | 12.6 | 14.0 | 15.4 | 16.6 | 16.8 | 18.7 |
| Cable Weight（Kg/km） | 153 | 153 | 156 | 167 | 202 | 234 | 267 | 271 | 333 |
| Tensile（N） | Long/Short Term：1000/3000 | ||||||||
| Crush（N/100mm） | Long/Short Term：1000/3000 | ||||||||
| Min. Bending Radius (mm) | Static/Dynamic：12.5D/25D | ||||||||
| Temperature (℃) | Storage /Operation：-40℃~70℃ | ||||||||
2. Fiber Parameter G.652.D (after cable)
Item | Characteristics | Unit | Value | |
Geometrical | Cladding Diameter | μm | 125.0±1.0 | |
Cladding Non-circularity | % | ≤1.0 | ||
Core-Cladding Concentricity Error | μm | ≤0.6 | ||
Core Non-circularity | % | ≤12 | ||
Coating Diameter | μm | 245±10.0 | ||
Coating-Cladding Concentricity Error | μm | ≤12 | ||
Curl Radius | m | ≥4 | ||
Attenuation | Zero Dispersion Slope S0 | ps/nm²km | ≤0.092 | |
1625nm Attenuation | dB/km | ≤0.30 | ||
1383+/-3nm Attenuation | dB/km | ≤0.36 | ||
1310nm Attenuation | dB/km | ≤0.36 | ||
1550nm Attenuation | dB/km | ≤0.22 | ||
Point Discontinuity (1310nm & 1550nm) | dB | ≤0.05 | ||
Attenuation at 1285nm ~ 1330nm compared with 1310nm | dB | ≤0.03 | ||
Attenuation at 1485nm ~1580nm compared with 1550nm | dB | ≤0.03 | ||
Zero Dispersion Wavelength λ0 | nm | 1300≤λ0≤1324 | ||
Dispersion | 1285~1339nm Dispersion | ps/nm/km | ≤3.5 | |
1271~1360nm Dispersion | ps/nm/km | ≤5.3 | ||
1550nm Dispersion | ps/nm/km | 13.3~18.6 | ||
Nominal MFD Value（1310nm） | μm | 8.6-9.5 | ||
MFD Tolerance | μm | ±0.4 | ||
Bending | Cable Cut-off Wavelength λcc | nm | ≤1260 | |
1550nm Macro-bend Induced Attenuation（ 100turns with diameter of 60mm ） | dB | ≤0.5 | ||
PMD | Q | 0.01% | ||
Maximum Individual Fiber | ps/√km | 0.2 | ||
M | 20 cables | |||
3. Color Identification for Fiber and Tube
No. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
Color | Blue | Orange | Green | Brown | Slate | White | Red | Black | Yellow | Violet | Pink | Aqua |
Reel Length:
normally 2km, 3km, 4km, 5km (as your request)
Drum options: Fumigated Wooden Drum, Steel-reinforced Wooden Drum, Plywood Drum.
Cable and Drum Marking according to customer's requirements.
Shipping Pictures:
