Corning Single Mode fiber SMF-28 Optical Bare Fiber 500km / 20x25km

Corning SMF-28 is a single-mode optical fiber engineered for long-haul and submarine network deployments. Supplied as 20 spools of 25 km each (500 km total length), this ITU-T G.652-compliant bare fiber delivers ultra-low attenuation and high tensile strength critical for signal integrity across extended distances.

– Technical Specifications

• Fiber Type: Single-Mode Optical Fiber (SMF-28)
• Total Length: 500 km (20 × 25 km spools)
• Core Diameter: 8.2 µm
• Cladding Diameter: 125.0 ± 0.7 µm
• Mode-Field Diameter: 9.2 ± 0.4 µm @ 1310 nm; 10.7 ± 0.5 µm @ 1550 nm
• Numerical Aperture: 0.14
• Zero Dispersion Wavelength: 1313 nm (typical); range 1300–1324 nm
• Zero Dispersion Slope: 0.086 ps/(nm²•km) typical; ≤ 0.092 ps/(nm²•km) max
• Attenuation: ≤ 0.34 dB/km @ 1310 nm; ≤ 0.20 dB/km @ 1550 nm
• Polarization Mode Dispersion: ≤ 0.06 ps/√km (link design); ≤ 0.1 ps/√km (max individual fiber)
• Macrobend Loss: ≤ 0.03 dB @ 1550 nm (100 turns, 32 mm mandrel); ≤ 0.03 dB @ 1310 nm (100 turns, 50 mm mandrel)
• Dispersion: ≤ 18.0 ps/(nm•km) @ 1550 nm; ≤ 22.0 ps/(nm•km) @ 1625 nm
• Cable Cutoff Wavelength: ≤ 1260 nm
• Tensile Proof Stress: ≥ 100 kpsi (0.7 GPa)
• Coating: Dual Acrylate CPC® coating, 245 ± 5 µm OD
• Manufacturing Process: Outside Vapor Deposition (OVD)

– Key Features

• ITU-T G.652 (including G.652.D) compliance ensures interoperability across diverse telecom infrastructures
• Ultra-low attenuation minimizes signal degradation over extended spans
• High tensile strength rated to 100 kpsi proof stress supports demanding installation and operational conditions
• Dual Acrylate CPC® coating provides environmental protection and durability
• PMD specifications support networks designed for ≤ 0.5 ps/√km maximum PMD

– Typical Applications

• Long-haul terrestrial and submarine optical networks
• High-capacity transmission systems at 1310 nm and 1550 nm
• Regional and backbone network infrastructure

– Compatibility & Integration

SMF-28 integrates with standard single-mode terminal equipment, splicing systems, and optical amplifiers designed for ITU-T G.652 compliance. Zero dispersion wavelength of 1313 nm and controlled dispersion slope enable predictable performance in wavelength-division multiplexed (WDM) systems operating across the O, E, S, C, and L bands.