Manufacturer Single Fiber Bidirectional 1G

1G BiDi SFP transceivers enable full-duplex Gigabit Ethernet over a single fiber strand, reducing fiber usage while supporting distances from 3 km up to 120 km depending on the model.

Overview

1G BiDi SFP modules are Small Form-Factor Pluggable transceivers designed for single-mode fiber applications. Unlike standard duplex SFPs that require two fibers (one for transmit, one for receive), BiDi modules use wavelength division multiplexing (WDM) to transmit and receive data over a single fiber strand, making them ideal for fiber-constrained deployments in enterprise networks, data centers, and telecom infrastructure .

Key Manufacturers and Products

• Ubiquiti: Offers the UF-SM-1G-S module, supporting 1 Gbps over single-mode fiber up to 3 km with LC connectors. BiDi models require deployment in matched wavelength pairs for proper operation .
• Cisco: Provides 1000BASE-BX SFPs such as GLC-BX-D/U for bidirectional transmission over a single strand, supporting distances up to 10 km. Industrial temperature variants are available for harsh environments, and modules support Digital Optical Monitoring (DOM) for real-time performance tracking .
• EdgeOptic: Supplies a wide range of 1G BiDi SFPs with distances from 3 km to 120 km, LC/UPC connectors, and compatibility with standard Gigabit Ethernet switches and routers .
• Syrotech: Offers 1G BiDi SFPs optimized for long-distance transmission with low power consumption, suitable for enterprise and telecom applications .

Technical Features

• Data Rate: 1 Gbps (Gigabit Ethernet)
• Fiber Type: Single-mode (SMF)
• Connector Type: LC/UPC
• Distance Range: 3 km to 120 km depending on module and wavelength
• Full-Duplex Communication: Enabled over a single fiber strand
• Hot-Swappable: Compatible with MSA-compliant SFP ports
• Power Consumption: Low, typically under 1 W
• Applications: Enterprise LAN, data center interconnects, FTTx, and telecom networks

Advantages

• Reduces fiber usage by half compared to standard duplex SFPs
• Cost-effective for fiber-constrained environments
• Flexible deployment with matched wavelength pairs
• Supports long-distance links without additional fiber infrastructure
• Monitoring and reliability features available on industrial-grade modules

Deployment Considerations

• BiDi modules must be paired correctly (A/B wavelengths) to ensure proper communication.
• Fiber quality, splices, and connectors affect maximum achievable distance.
• Some modules support industrial temperature ranges (-40°C to 85°C) for outdoor or harsh environments.
• Digital Optical Monitoring (DOM) can provide real-time metrics such as optical power, temperature, and voltage for network management . 1G BiDi SFPs are widely used to maximize fiber efficiency while maintaining reliable Gigabit Ethernet performance, making them a practical choice for modern network deployments where fiber availability is limited.