Corning SMF-28(R) ULL Single Mode Optical Bare Fiber 2150 M / 2km

Corning SMF-28(R) ULL Single Mode Optical Bare Fiber is an ultra-low loss fiber engineered for long-distance telecommunications infrastructure and extended-reach applications. This 2150 m / 2 km bare fiber delivers minimal signal degradation across C-band and L-band wavelengths, meeting ITU-T G.652.B and G.654.C compliance standards. With maximum attenuation of 0.17 dB/km at 1550 nm and superior chromatic dispersion characteristics, It has the optical performance required for demanding backbone and subsea deployments.

Technical Specifications

• Core diameter: 8.2 µm


• Cladding diameter: 125.0 ± 0.7 µm


• Numerical aperture: 0.14 (at 1310 nm)


• Cable cutoff wavelength: ≤ 1260 nm


• Attenuation at 1310 nm: ≤ 0.31 dB/km


• Attenuation at 1550 nm: 0.16 dB/km (typical), 0.17 dB/km (maximum)


• Attenuation at 1625 nm: ≤ 0.20 dB/km


• Attenuation at 1383 ± 3 nm: ≤ 2.1 dB/km Dispersion and PMD


• Chromatic dispersion at 1550 nm: ≤ 18.0 ps/(nm
  
  km)


• Chromatic dispersion at 1625 nm: ≤ 22.0 ps/(nm
  
  km)


• Zero dispersion wavelength: 1304 nm to 1324 nm


• Zero dispersion slope: ≤ 0.092 ps/(nm²
  
  km)


• Polarization mode dispersion link design value: ≤ 0.04 ps/√km


• Maximum individual fiber PMD: ≤ 0.1 ps/√km Mechanical Properties


• Macrobend loss at 1550 nm (1 turn, 10 mm radius): ≤ 0.1 dB


• Macrobend loss at 1550 nm (10 turns, 15 mm radius): ≤ 0.05 dB


• Point discontinuity: ≤ 0.05 dB at 1310 nm and 1550 nm


• Core-cladding concentricity: ≤ 0.6 µm to ≤ 0.8 µm (dependent on ITU compliance variant)


• Cladding non-circularity: ≤ 0.7%


• Tensile proof stress: ≥ 100

Key Features

• Ultra-low loss design minimizes signal attenuation over extended distances


• ITU-T G.652.B and G.654.C compliance for infrastructure interoperability


• Low PMD characteristics support high-speed coherent transmission


• Excellent macrobend performance enables practical installation flexibility


• Uniform spectral response across C-band (1525–1575 nm) and L-band (1550–1625 nm)

Typical Applications

• Long-haul terrestrial backbone routes


• Submarine cable systems


• Metro core rings requiring extended reach


• High-capacity coherent optical systems

Compatibility & Integration Conforms to ITU-T Recommendation G.652.B and G.654.C standards, ensuring compatibility with existing telecommunications infrastructure and new-generation transmission equipment.