Corning SMF-28(R) ULL FIBER is a single-mode optical fiber engineered for long-distance, high-performance network transmission. This ultra-low-loss design delivers exceptional signal integrity across extended spans, supporting both conventional and architectures. Compliant with ITU-T G.652.B and G.654.C standards, the fiber achieves attenuation and polarization mode dispersion characteristics.
Technical Specifications
Physical Properties
• Core diameter: 8.2 µm
• Cladding diameter: 125.0 ± 0.7 µm
• Coating diameter: 242 ± 5 µm (standard); 200 ± 5 µm (high-density)
• Core-clad concentricity: ≤ 0.8 µm (G.654.C) / ≤ 0.6 µm (G.652.B)
• Cladding non-circularity: ≤ 0.7%
• Minimum fiber curl radius: ≥ 4.0 m
• Proof test level: ≥ 100 kpsi (0.69 GPa)
Optical Performance
• Attenuation at 1310 nm: ≤ 0.31 dB/km (max), ≤ 0.272 dB/km (typical)
• Attenuation at 1550 nm: ≤ 0.17 dB/km (max), ≤ 0.158 dB/km (typical)
• Attenuation at 1625 nm: ≤ 0.20 dB/km
• Zero dispersion wavelength: 1300–1324 nm
• Dispersion slope: ≤ 0.092 ps/(nm²•km)
• Chromatic dispersion at 1550 nm: ≤ 18.0 ps/(nm•km)
• Chromatic dispersion at 1625 nm: ≤ 22.0 ps/(nm•km)
• Mode-field diameter at 1310 nm: 9.2 ± 0.5 µm
• Mode-field diameter at 1550 nm: 10.7 ± 0.5 µm
• Numerical aperture: 0.14 NA
• Maximum individual fiber PMD: ≤ 0.1 ps/√km
• PMD link design value: ≤ 0.04 ps/√km
• Cable cutoff wavelength: ≤ 1260 nm
Environmental Stability
• Temperature dependence: ≤ 0.05 dB/km over −60°C to +85°C
• Temperature-humidity cycling: ≤ 0.05 dB/km (−10°C to +85°C, 98% RH)
– Key Features
• Ultra-low attenuation enables longer transmission distances with minimal signal degradation
• Low PMD (≤ 0.1 ps/√km) supports high data rates without timing distortion
• Dual ITU standard compliance ensures interoperability across legacy and advanced systems
• Attenuation flatness across C, L, and extended bands maintains performance across wavelength windows
• Mandrel wrap performance at 1550 nm (≤ 0.75 dB) confirms bend-resistant characteristics
– Typical Applications
• Long-haul terrestrial and submarine cable systems
• Metro and regional backbone networks
• DWDM and coherent transmission systems
• Dispersion-managed long-distance links
– Compatibility & Integration
Mode-field diameter matches standard single-mode fiber families, enabling straightforward splicing and connector integration. Zero dispersion wavelength centered at 1300–1324 nm provides optimal performance in conventional and extended-band DWDM grids. Supplied in 8,000 m / 8 km length.
