SFP BIDI transceiver Lightwin LWO-SFP100-5531-20, 155 Mbps, 1550nm TX / 1310nm RX, 20 km, DDM, LC-Simplex, Singlemode

Lightwin LWO-SFP100-5531-20 is a bidirectional (BIDI) singlemode SFP transceiver module that supports a 155 Mbps data rate with a 1550 nm transmit wavelength and a 1310 nm receive wavelength. The module is designed for point-to-point fiber links up to 20 km using an LC-simplex connector and provides Digital Diagnostic Monitoring (DDM) for real-time status of optical parameters. It is intended for telecom, metro networks, media converters and fiber uplink applications where wavelength-division bidirectional connectivity reduces fiber count.

Advantages

The transceiver combines BIDI functionality and singlemode optics to enable two-way communication over a single fiber strand, reducing cabling complexity and installation costs. With support for DDM, network administrators can monitor transmit power, receive power, temperature, supply voltage and laser bias current remotely, which simplifies troubleshooting and maintenance. The LC-simplex interface provides compatibility with standard fiber patch panels and media converters, while the compact SFP form factor allows hot-pluggable installation in compatible equipment.

Suitable for

• Telecommunication and metro network links requiring 155 Mbps throughput.
• Media converters that convert electrical interfaces to singlemode fiber.
• Fiber uplinks and access networks where minimizing fiber count is important.
• Environments that benefit from remote diagnostics via DDM.

When it may not be suitable

This module is optimized for singlemode fiber and is not suitable for multimode fiber systems. It supports a fixed data rate of 155 Mbps, so it is not appropriate for applications that require higher Ethernet speeds such as Gigabit or 10 Gigabit links. Additionally, the wavelengths (1550 nm TX / 1310 nm RX) are specific to BIDI deployment; using the wrong complementary module or mismatched wavelengths will prevent link establishment.

Key specifications

• Data rate: 155 Mbps
• Transmit wavelength: 1550 nm
• Receive wavelength: 1310 nm
• Maximum link distance: up to 20 km over singlemode fiber
• Connector type: LC-Simplex
• Form factor: SFP (hot-pluggable)
• Diagnostic feature: Digital Diagnostic Monitoring (DDM)
• Fiber type: Singlemode

How to use

Install the Lightwin LWO-SFP100-5531-20 into a compatible SFP slot while the host device is powered on or off; the SFP is hot-pluggable but follow your equipment vendor guidelines. Connect the LC-simplex connector to the singlemode fiber link, ensuring the mating cable uses the complementary BIDI module at the remote end (the remote module must use 1310 nm TX / 1550 nm RX). Verify the link and monitor DDM parameters through your switch, media converter or network management system to confirm optical power levels and module status.

What to consider before purchase

• Verify that the host device supports third-party SFP modules and the SFP form factor.
• Confirm singlemode fiber infrastructure and that the remote end uses the complementary BIDI wavelength pairing.
• Ensure 155 Mbps data rate meets the application requirements; this module is not backward/forward compatible with higher-speed interfaces.
• Check that the maximum 20 km range is sufficient for your link budget and account for connector/splice losses.

Usage recommendations

For reliable operation, match the transceiver with a complementary BIDI module at the far end, maintain clean LC connector endfaces, and monitor DDM readings after installation to validate optical margins and detect degradation. Use proper ESD precautions during handling and follow vendor instructions for supported devices.