Corning SMF-28 is a single-mode optical fiber meeting ITU-T G.652.D standards, designed for long-haul telecommunications, research, and specialized optical systems. This 20 km bare fiber spool supports dual operating wavelengths at 1310 nm and 1550 nm with exceptionally low attenuation across the C, L, and extended bands. The uncoated fiber enables custom termination and splicing for integration into bespoke systems while maintaining high durability and low microbending sensitivity.
Technical Specifications
Optical Performance
• Operating Wavelengths: 1310 nm and 1550 nm
• Attenuation at 1310 nm: ≤0.32 dB/km; 1550 nm: ≤0.18 dB/km; 1625 nm: ≤0.20 dB/km
• Mode Field Diameter: 9.2 ± 0.4 µm @ 1310 nm; 10.4 ± 0.5 µm @ 1550 nm
• Zero Dispersion Wavelength (λ₀): 1300–1324 nm
• Dispersion @ 1550 nm: ≤18.0 ps/(nm•km)
• Polarization Mode Dispersion: ≤0.04 ps/√km (link design value)
• Numerical Aperture: 0.14
• Cable Cutoff Wavelength: ≤1260 nm
Mechanical Properties
• Core Diameter: 8.2 µm
• Cladding Diameter: 125.0 ± 1 µm
• Coating Diameter: 245 ± 5 µm (bare fiber)
• Proof Test: ≥100 kpsi (0.7 GPa)
• Core-Clad Concentricity: ≤0.5 µm
• Fiber Curl: ≥4.0 m radius of curvature
Environmental Robustness
• Operating Range: -60°C to +85°C
• Induced Attenuation (all bands): ≤0.05 dB/km across temperature, humidity, and thermal cycling
– Key Features
• ITU-T G.652.D compliant with G.657.A1 performance margins
• Manufactured via Outside Vapor Deposition (OVD) for consistent geometry
• Low attenuation exceeds standard specifications across C, L, and extended L bands
• Minimal dispersion slope (≤0.092 ps/(nm²•km)) supports DWDM deployment
• Temperature-stable attenuation maintains signal integrity in extreme environments
– Typical Applications
• Long-haul terrestrial and submarine telecommunications
• DWDM and coherent optical systems
• Research and laboratory instrumentation
• Aerospace and defense optical networks
• Custom fiber-optic subsystem integration
