Single-fiber 10GE optical module speed

Single-fiber 10GE optical modules, such as BiDi SFP+ transceivers, support full 10 Gigabit per second (10Gbps) data transmission over a single strand of single-mode fiber using wavelength-division multiplexing (WDM).

Overview of Single-Fiber 10GE Modules

Single-fiber 10GE modules, commonly implemented as BiDi (bidirectional) SFP+ transceivers, enable full-duplex 10GbE communication over a single strand of single-mode fiber (SMF). This is achieved by assigning different wavelengths for transmitting and receiving signals, allowing simultaneous bidirectional data flow without interference . Typical wavelength pairs might include 1270 nm for transmission and 1330 nm for reception on one end, with the opposite end swapping these wavelengths .

Speed and Performance

• Data Rate: Full 10Gbps per module, supporting standard 10 Gigabit Ethernet speeds .
• Distance: Depending on the module and fiber quality, single-fiber BiDi modules can support distances from 10 km up to 100 km, with common enterprise and metro modules supporting 10–80 km .
• Technology: Uses WDM and DFB lasers for stable wavelength output, along with PIN photodiode receivers and internal WDM couplers to separate inbound and outbound optical paths .
• Power Consumption: Typically ≤1W, making them energy-efficient for high-density deployments .

Advantages of Single-Fiber 10GE Modules

• Fiber Savings: Reduces fiber usage by 50% compared to traditional dual-fiber SFP+ modules .
• Simplified Cabling: Fewer fibers and ports reduce complexity in data centers and campus networks .
• High-Density Deployment: Ideal for spine/leaf architectures, FTTx, and carrier metro rings where fiber availability is limited .
• Standards Compliance: Compatible with SFP+ MSA, CPRI, and eCPRI protocols, ensuring interoperability with major switch and NIC vendors .

Long-Reach Single-Fiber 10GE Modules

For extended distances, SFP-10G-ZR modules provide 10Gbps over single-mode fiber up to 80 km using 1550 nm lasers and dispersion compensation techniques . These modules are suitable for metropolitan area networks (MANs), inter-building links, and long-distance data center connections. They also support digital diagnostics monitoring (DDM/DOM) for real-time performance tracking .

Summary

Single-fiber 10GE optical modules deliver full 10Gbps speed over a single strand of fiber by leveraging WDM technology. They are highly efficient, reduce fiber requirements, and support distances ranging from a few kilometers to 80 km or more, depending on the module type. These modules are widely used in data centers, campus networks, and metro networks where fiber conservation and simplified cabling are critical .