25G BiDi SFP28 80km Simplex LC Single-Mode Fiber Transceiver

• Supports data rates up to 25.78125Gb/s
• Up to 80km transmission over G.652 single-mode fiber
• BiDi bidirectional transmission over a single fiber strand
• TX wavelength: 1309nm
• RX wavelength: 1295nm
• EML laser transmitter
• Integrated SOA and PIN TIA receiver
• Hot-pluggable SFP28 form factor
• Simplex LC optical connector
• Supports Digital Diagnostic Monitoring (DDM)
• Commercial and industrial temperature options available
• Commercial power consumption ≤2.2W
• Industrial power consumption ≤2.8W
• Designed for long-distance 25G Ethernet applications

• 25G Ethernet long-distance links
• 5G mobile backhaul
• 5G network transport and aggregation
• Metro network aggregation
• Data center interconnects (DCI)
• Long-distance enterprise networks
• Fiber-constrained network deployments
• Single-fiber network expansion
• Telecom access and transport networks

FiberMania provides OEM and customized manufacturing services for 25G BiDi SFP28 optical transceivers. Customization options can include TX/RX wavelength combinations, host equipment compatibility, EEPROM coding, DDM parameters, operating temperature grade, product labeling, housing identification, packaging, and other project-specific requirements.

For BiDi applications, the transceiver must be paired with a complementary module using the corresponding opposite wavelength configuration. Customers can provide their existing module specifications or target equipment information so our engineering team can evaluate wavelength pairing, host compatibility, and network deployment requirements before production.

Q1. Why does a BiDi transceiver use only one fiber?

A BiDi transceiver uses different wavelengths for transmitting and receiving signals, allowing both directions of communication to share a single fiber strand. This can significantly reduce fiber consumption compared with conventional duplex optical links and is especially useful when spare fiber resources are limited.

Q2. Can two identical 25G BiDi modules be used at both ends of a link?

Normally, BiDi modules need to be used as a complementary pair rather than as two identical units. The TX wavelength of one module should correspond to the RX wavelength of the other, and vice versa. For this configuration, a 1309nm TX / 1295nm RX module should be paired with the complementary wavelength configuration.

Q3. What is the role of the integrated SOA in the receiver?

The Semiconductor Optical Amplifier (SOA) can provide optical signal amplification within the receiver path, helping compensate for optical losses in extended-reach links. Combined with the PIN photodiode and TIA, it supports the receiver’s ability to detect and process weak incoming optical signals.

Q4. What is the difference between the commercial and industrial versions?

The primary difference is their intended operating environment and power consumption. The industrial version is designed for wider temperature conditions and has a higher maximum power consumption of up to 2.8W, while the commercial version has a maximum power consumption of 2.2W. The appropriate grade should be selected according to the installation environment.

Q5. What should be considered when planning an 80km BiDi link?

The nominal 80km reach should not be considered independently from the complete optical link. Fiber attenuation, connector and splice losses, optical power budget, fiber quality, wavelength characteristics, and the performance of the paired BiDi modules should all be evaluated to determine whether the required distance can be reliably achieved.

Q6. Can the TX/RX wavelengths be customized for a specific project?

Yes. For OEM and B2B projects, customized wavelength configurations can be discussed according to the customer’s network architecture. The complementary wavelength relationship between the two ends must be maintained so that the modules can communicate correctly over the single fiber.