Corning SMF-28 Single Mode Optical Fiber 4,000m / 4km *CONNECTORS or BARE*

The Corning SMF-28 Single Mode Optical Fiber is a high-performance 4,000 m (4 km) spool engineered for telecommunications and data networking infrastructure. Manufactured via Outside Vapor Deposition (OVD), this fiber delivers exceptional purity, geometric consistency, and low signal attenuation across mission-critical wavelength bands. Compliant with ITU-T G.652, TIA/EIA-492CAAA, and IEC 60793-2-50, it serves as the backbone for both legacy and optical systems.

– Technical Specifications

Optical Characteristics

• Core diameter: 8.2 µm
• Cladding diameter: 125.0 ± 0.7 µm
• Mode Field Diameter at 1310 nm: 9.2 µm ± 0.5 µm
• Mode Field Diameter at 1550 nm: 10.5 µm ± 0.5 µm
• Numerical Aperture (NA): 0.14
• Core-cladding concentricity: ≤ 0.5 µm
• Cladding non-circularity: ≤ 0.7%
• Cut-off wavelength: 1220–1300 nm
• Attenuation at 1310 nm: ≤ 0.35 dB/km
• Attenuation at 1550 nm: ≤ 0.25 dB/km
• Typical attenuation: < 0.2 dB/km
• Attenuation at water peak (1383 ± 3 nm): ≤ 2.1 dB/km
• Point discontinuity: ≤ 0.10 dB at 1310 nm and 1550 nm
• Zero dispersion wavelength: 1302–1322 nm
• Zero dispersion slope: ≤ 0.092 ps/(nm²•km)
• Dispersion at 1550 nm: ≤ 18.0 ps/(nm•km)
• Dispersion at 1625 nm: ≤ 22.0 ps/(nm•km)
• PMD Link Design Value: ≤ 0.04 ps/√km
• Maximum individual fiber PMD: ≤ 0.1 ps/√km

Mechanical & Physical Characteristics

• Coating diameter: 245 ± 5 µm
• Coating-cladding concentricity: < 12 µm
• Coating non-circularity: ≤ 6.0%
• Minimum fiber curl radius: ≥ 4.0 m
• Proof test strength: ≥ 100 kpsi (0.7 GN/m²)

Environmental

• Operating temperature: -60°C to +85°C
• Temperature-induced attenuation: ≤ 0.05 dB/km
• Temperature-humidity cycling-induced attenuation: ≤ 0.05 dB/km

– Key Features

• Optimized for 1310 nm and 1550 nm wavelength windows
• Ultra-low attenuation minimizes signal regeneration requirements
• Industry-standard G.652 compliance ensures interoperability
• Tight geometric tolerances enable efficient coupling and low loss splicing
• Proven OVD manufacturing process ensures fiber purity and reliability

– Typical Applications

• Long-haul terrestrial and submarine telecommunications
• Metropolitan and campus area networks
• DWDM and wavelength-division multiplexing systems
• Backbone network infrastructure
• Hybrid analog/digital signal distribution

– Compatibility & Integration

Available with connectorized terminations or as bare fiber spools. Integrates with standard single-mode patch panels, fusion splicing equipment, and optical test instrumentation calibrated for C-band and L-band operation.