Single-mode SFP transceivers for 20 km support 1–1.25 Gbps data rates over 1310 nm wavelength fiber, ideal for long-distance Gigabit Ethernet links.

Key Specifications

• Data Rate: Typically 1 Gbps (1000BASE-LX) or 1.25 Gbps for high-performance modules .
• Wavelength: 1310 nm, using Fabry-Pérot (FP) or distributed feedback (DFB) lasers for stable long-distance transmission .
• Fiber Type: Duplex single-mode fiber (9/125 µm SMF) is standard for 20 km reach .
• Connector Interface: LC duplex connectors are commonly used for secure and reliable connections .
• Hot-Pluggable: Most modules are SFP form-factor and hot-swappable, allowing installation or replacement without shutting down network equipment .
• Standards Compliance: IEEE 802.3, SFP MSA, and RoHS compliance ensures interoperability across switches, routers, and other network devices .
• Power Consumption: Low power operation, typically under 1 W, suitable for energy-efficient deployments .
• Optional Features: Some modules include Digital Optical Monitoring (DOM) for real-time monitoring of transmit/receive power, temperature, and voltage .

Applications

• Enterprise Networks: Campus networks and long-distance LAN links.
• Metropolitan Access Networks: Connecting switches and routers across city-scale infrastructure.
• Data Centers: High-speed interconnects between racks or buildings.
• ISP Networks: Long-range optical links for subscriber connectivity.
• Infrastructure Monitoring: Remote monitoring systems requiring reliable long-distance communication .

Deployment Considerations

• Ensure the transceiver is compatible with the host device (switch, router, or access point). Many 20 km SFPs are MSA-compliant and compatible with major brands, including Cisco-equivalent modules .
• Verify fiber type and connector match the existing cabling infrastructure.
• Consider modules with DOM if network monitoring and diagnostics are required.
• For bidirectional (BiDi) applications, specialized 20 km BiDi SFPs allow single-fiber operation, reducing cabling complexity . Single-mode 20 km SFP transceivers provide a cost-effective, reliable solution for medium-to-long distance Gigabit Ethernet transmission, combining compact design, hot-swappability, and standards compliance for flexible network deployment .