General Information:
· Cable Type: GJYXCH (Optical Fiber Cable with various core counts)
Fiber Type: G.657.A1 (Single-mode fiber)
Fiber Colors:
GJYXCH-1: Blue (1 Core)
GJYXCH-2: Blue, Orange (2 Cores)
GJYXCH-4: Blue, Orange, Green, Brown (4 Cores)
Physical Specifications:
· Load-bearing Strength Member:
Material: Phosphating Steel Wire
Size: 1 wire, 1.0 mm
· Cable Strength Member:
Material: Phosphating Steel Wire
Size: 2 wires, 0.45 mm
· Outer Sheath Material: LSZH (Low Smoke Zero Halogen)
· Cable Diameter: (2.0 ± 0.1) x (5.1 ± 0.1) mm
Mechanical Properties:
· Minimum Bending Radius:
Operation: 30D (D = Cable Diameter)
Using: 15D
· Available Tensile Strength:
Long-term: 300N
Short-term: 600N
· Available Crush Strength:
Long-term: 1000 N/100mm
Short-term: 2000 N/100mm
Optical Characteristics (After Cable Finished):
· Attenuation:
1310 nm: ≤ 0.36 dB/km
1550 nm: ≤ 0.22 dB/km
· Cut-off Wavelength: (not provided, typically ≤ 1260 nm for G.657.A1)
Environmental Characteristics:
· Storage Temperature: -40°C to +70°C
· Operating Temperature: -30°C to +60°C
■ Cross Section:
■ Cable Specification:
· 2024: Year of manufacture.
· FTTH: Type of cable (Fiber to the Home).
· XX (G.657A): Number of cores (e.g., 1 core, 2 cores, etc.) with the fiber type specified as G.657A (a single-mode optical fiber standard).
· XXXXm: Length of the cable in meters.
The marking is printed every 1 meter;
● The color of marking is white, but if the remarking is necessary, the yellow color marking shall be printed newly on a different position.
● An occasional unclear of length marking is permitted if both of the neighboring markings are clear;
● The both cable ends are sealed with heat shrinkable end caps to prevent water ingress.
■ Fiber Properties:
The properties of single mode optical fiber (ITU-T Rec. G.657)
Physical Characteristics:
· MFD (Mode Field Diameter) at 1310nm: 8.2 – 9.0 mm
· Cladding Diameter: 125.0 ± 0.7 mm
· Cladding Non-circularity: ≤ 1.0% (ensures the cladding is nearly circular)
· Cladding to Core Concentricity Error: ≤ 0.5 mm (ensures proper alignment between the core and cladding)
· Secondary Coating Diameter: 245.0 ± 10.0 mm
· Secondary Coating to Cladding Concentricity Error: ≤ 12.0 mm
· Fiber Curl: ≥ 4.0 m (indicates minimum allowable radius for fiber bending)
Optical Performance (Attenuation) at Various Wavelengths:
· At 1310nm: ≤ 0.34 dB/km
· At 1383nm: ≤ 0.31 dB/km
· At 1383nm (after H2 aging): Δ ≤ 0.01 dB/km (indicates minimal degradation after aging)
· At 1550nm: ≤ 0.20 dB/km
· At 1625nm: ≤ 0.23 dB/km
Discontinuity:
· Point Discontinuity at 1310nm and 1550nm: ≤ 0.02 dB (ensures minimal discontinuities at these wavelengths)
Cut-off Wavelength (λc):
· At 1310nm: 1150 ≤ λc ≤ 1330 nm (indicates the operational range for fiber cut-off)
Zero Dispersion Wavelength (λ₀):
· At 1310 – 1324 nm: 1300 – 1324 nm (range of wavelengths with minimal chromatic dispersion)
Chromatic Dispersion (D(λ)):
· At 1288-1339 nm: ≤ 3.5 ps/(nm·km)
· At 1271-1360 nm: ≤ 5.3 ps/(nm·km)
· At 1550 nm: ≤ 18 ps/(nm·km)
· At 1625 nm: ≤ 22 ps/(nm·km)
Polarization Mode Dispersion (PMD):
· Fiber PMD: ≤ 0.2 ps/km¹/²
· Link PMD: ≤ 0.1 ps/km¹/² (for longer transmission distances)
● Attenuation vs. Wavelength maximum increase of the att. in 1285-1330nm reference the att. at 1310nm 0.03dB/km; maximum increase of the att. in 1525-1575nm reference the att. at 1550nm 0.02dB/km.
● Attenuation from out end- attenuation from inner end 0.05dB/km ; max segment loss-avg loss0.03dB/km.(OTDR)
■ Mechanical Characteristics:
Proof Stress Level:
· Strain: ≥ 2.0% (indicates the strain at which the proof stress is defined)
· Proof Tension Stress: ≥ 19.76 N (the force at which the fiber undergoes permanent deformation)
Allowable Bending Radii:
· 15 mm (the minimum radius the fiber can be bent without damaging it)
Additional Attenuation with Bending:
· For 10 turns with D=30mm:
At 1550 nm: α ≤ 0.25 dB
At 1625 nm: α ≤ 1.0 dB
· For 1 turn with D=20mm:
At 1550 nm: α ≤ 0.75 dB
At 1625 nm: α ≤ 1.5 dB
These values represent the additional signal loss (attenuation) induced when the fiber is bent. A smaller bending radius or more turns results in higher attenuation.
Coating Strip Force:
· Peak Value (F): 1 ≤ F ≤ 8.9 N (force required to strip the coating)
· Average Value (F): 1 ≤ F ≤ 5 N (average stripping force required)
Dynamic Fatigue Test (Nd):
· Nd ≥ 20 (a measure of the fiber’s resistance to dynamic fatigue, indicating the number of cycles the fiber can withstand under stress before breaking)
Tensile Test, Breaking Strength (sf(0.5)):
· sf ≥ 3.8 GPa (the breaking strength of the fiber, measured in gigapascals, indicating the fiber’s ability to withstand tension)
■ Packing and Marking:
Packing
● Each single length of cable shall be reeled on Plastic Drum.
● Drum length: Standard drum length is 3000m±2% or design as per client inquiry ;
Drum Marking (can according to the requirement in the technical specification)
-Manufacturer name;
-Manufacturing year and month;
-Roll-direction arrow;
-Cable outer end position indicating arrow;
-The word “OPTICAL FIBER CABLE”;
-Cable type and size;
-Drum number;
-Drum length;
-Gross / net weight;
-Origin, The word “MADE IN CHINA”;
-Caution plate indicating the correct method for loading, unloading and convey the cable;
-Other customer information such as contract no., project no., and delivery destination. (if needed)
Cable identification documents
-Product qualified certificate;
-Test report.
