The CORNING SMF-28e+ is a G.652.D compliant single-mode optical fiber engineered for metro and access network deployments. This 2.1 km spool delivers low attenuation across an extended wavelength range of 1260 nm to 1625 nm, with exceptional performance at 1550 nm (≤ 0.18 dB/km) and 1490 nm (≤ 0.21 dB/km). The fiber maintains backward compatibility with legacy single-mode installations while offering tighter manufacturing tolerances and improved macrobend characteristics.
Technical Specifications
Optical Performance
• Operating wavelength: 1260 nm to 1625 nm
• Attenuation at 1310 nm: ≤ 0.32 dB/km
• Attenuation at 1550 nm: ≤ 0.18 dB/km
• Attenuation at 1625 nm: ≤ 0.20 dB/km
• Mode field diameter at 1310 nm: 9.2 ± 0.4 µm
• Mode field diameter at 1550 nm: 9.9–10.9 µm
• Zero dispersion wavelength: 1304 nm ≤ λ₀ ≤ 1324 nm (±7 nm tolerance)
• Dispersion at 1550 nm: ≤ 18.0 ps/(nm•km)
• Dispersion at 1625 nm: ≤ 22.0 ps/(nm•km)
• Polarization mode dispersion link design value: ≤ 0.06 ps/√km
• Maximum individual fiber PMD: ≤ 0.1 ps
• Cable cutoff wavelength: ≤ 1260 nm
• Numerical aperture: 0.14
Physical Dimensions
• Core diameter: 8.2 µm
• Cladding diameter: 125 ± 0.7 µm
• Coating diameter: 242 ± 5 µm
• Fiber curl: ≥ 4.0 m radius of curvature
Macrobend Loss
• 1550 nm (32 mm diameter, 100 turns): ≤ 0.03 dB
• 1310 nm (50 mm diameter, 100 turns): ≤ 0.03 dB
Mechanical & Environmental
• Proof test stress: ≥ 100 kpsi (0.69 GPa)
• Operating temperature: -60°C to +85°C
• Rayleigh backscatter coefficient at 1550 nm: -82 dB
– Key Features
• Improved macrobend performance: 0.03 dB vs. 0.05 dB legacy specification
• NexCor® technology delivers 3 dB SBS threshold improvement
• Tighter zero dispersion wavelength tolerance (±7 nm vs. ±10 nm)
• Full-length proof test ensures fiber reliability
• Low PMD for high-speed transmission systems
– Typical Applications
• Metro and access network deployments
• Network infrastructure upgrades
• Long-haul backbone installations
• Multi-wavelength systems leveraging C-band and L-band operation
– Compatibility & Integration
Full backward compatibility with ITU-T G.652 legacy single-mode fibers enables direct integration into existing optical networks without performance degradation.
