Lightwin 1.25G SFP BiDi transceiver, 1310nm-TX/1550nm-RX, 3km, DDM, LC simplex, single-mode LWO-SFP-3155-3

Network architects often face fiber scarcity in dense deployments, where each additional strand adds cost and complexity. The Lightwin LWO-SFP-3155-3 solves this by delivering full-duplex Gigabit Ethernet over a single strand of single-mode fiber. This BiDi SFP module transmits at 1310 nm and receives at 1550 nm, enabling bidirectional communication on one fiber core. With a reach of up to 3 km, it is ideal for campus backbones, enterprise access links, and metro edge connections where fiber pairs are limited or expensive.

Who is it for

This transceiver is built for network engineers, system integrators, and IT managers who need reliable, hot-swappable connectivity in switches, routers, and media converters. It suits organizations upgrading to fiber without laying new cable, as well as service providers maximizing existing fiber plant utilization.

Main features

• Bi-Directional (BiDi) design uses a single LC simplex connector and one fiber strand, halving fiber requirements.
• Supports 1.25 Gbps data rate, compliant with IEEE 802.3z 1000BASE-BX standards.
• Digital Diagnostic Monitoring (DDM/DOM) provides real-time monitoring of temperature, voltage, laser bias, and optical power.
• Hot-pluggable SFP MSA form factor for easy installation and replacement without network downtime.
• Operates over single-mode fiber (SMF) with a maximum distance of 3 km.
• DFB laser transmitter ensures stable signal quality and low power consumption (< 1 W).
• Commercial temperature range (0°C to 70°C) for standard indoor environments.

Specifications

• Form Factor: SFP (Small Form-Factor Pluggable)
• Data Rate: 1.25 Gbps
• Wavelength (Transmit): 1310 nm
• Wavelength (Receive): 1550 nm
• Fiber Type: Single-mode Fiber (SMF)
• Connector Type: LC Simplex
• Maximum Transfer Distance: 3 km
• DDM/DOM Support: Yes
• Duplex System: Simplex (BiDi)
• Compliance: IEEE 802.3z 1000BASE-BX, SFP MSA
• Hot-Plug Support: Yes
• Power Supply: 3.3V
• Operating Temperature: 0°C to 70°C
• Laser Type: DFB (Distributed Feedback)
• Power Consumption: < 1 W

Tips

For optimal performance, pair this BiDi module with a complementary transceiver that transmits at 1550 nm and receives at 1310 nm on the opposite end. Always clean LC connectors before insertion and use single-mode fiber patch cables with UPC or APC polish as per your network design. Enable DDM monitoring in your network management system to proactively detect link degradation.