Sumitomo Electric Single Mode Fiber DSF Optical Bare Fiber 25200 m / 25km

Sumitomo Electric Single Mode Fiber DSF is a 25.2 km dispersion-shifted optical fiber engineered for long-haul backbone and metro networks. This germanium-doped silica core fiber delivers low attenuation across C, L, and O bands while maintaining controlled dispersion characteristics. The 9/125 µm core/cladding geometry pairs with dual acrylate protective coatings in 250 µm nominal diameter, enabling direct integration with standard splicing and connectorization equipment.

Technical Specifications

• Fiber Type: Single Mode Fiber (SMF), Dispersion-Shifted Fiber (DSF)


• Standard Compliance: G.652.D, G.657.A1, G.657.A2


• Core/Cladding Diameter: 9/125 µm


• Protective Coating Diameter: 250 µm (standard); 200 µm and 180 µm options available


• Length: 25,200 meters (25 km)


• Attenuation: - 1310 nm: ≤ 0.35 dB/km - 1550 nm: ≤ 0.20 dB/km - 1625 nm: ≤ 0.23 dB/km


• Zero Dispersion Wavelength: 1300–1324 nm


• PMD Link Design Value: ≤ 0.06 ps/√km


• Zero Water Peak: Available in select variants for WDM applications

Key Features

• Dual acrylate protective coatings ensure mechanical durability


• Vapor Phase Axial Deposition (VAD) manufacturing process


• Backward compatible with legacy standard single-mode fibers


• Suitable for zero water peak WDM deployments

Typical Applications

• Long-distance backbone networks


• Core and metro network segments


• Access and FTTH infrastructure


• High-bandwidth transmission systems

Compatibility & Integration Fully compatible with commercially available fusion splicing equipment and connector products. Standard 9/125 µm geometry integrates directly into existing optical infrastructure without specialized tools or adaptation.