25G BiDi SFP28 80km Transceiver (Side B): BIDI-25G-SFP28-80B

Our EDGEOPTIC BIDI-25G-SFP28-80B is a multi-vendor compatible 25G BiDi SFP28 single-fiber optical module designed for ultra-long-haul 25 Gigabit Ethernet applications requiring fiber conservation. The BIDI-25G-SFP28-80B module transmits at 1309.14nm wavelength and receives at 1295.56nm wavelength, with data rates from 8.5 to 28.1 Gbps supporting multiple protocol standards and applications. Our 25G BiDi SFP28 80km transceiver utilizes EML (Electro-absorption Modulated Laser) technology for transmission and APD (Avalanche Photodiode) for receiving, serving as the complementary unit for bidirectional communication when paired with the BIDI-25G-SFP28-80A module.

The transceiver ensures a 31 dB guaranteed optical link budget with host-based Forward Error Correction (FEC) support, which determines the maximum transmission distance capabilities. Over standard single-mode fiber (SMF), the module achieves reliable bidirectional transmission up to 80 kilometers, making it ideal for regional backbone networks, inter-city connections, and applications where both fiber optimization and ultra-long reach are essential. However, distance is just an indicative parameter calculated for convenience of identification – eventually we calculate distance taking into account minimal optical budget and average attenuation of optical cabling in industry standards. The BiDi architecture with EML and APD technologies maximizes fiber utilization while maintaining exceptional 80km reach, requiring proper pairing with the BIDI-25G-SFP28-80A module to establish bidirectional communication.

BIDI-25G-SFP28-80B compatible ultra-long-haul BiDi module is hot-pluggable SFP28 with single LC/UPC connector as an optical interface, reducing fiber infrastructure requirements by 50% while supporting regional-scale distances. The electrical interface conforms to SFF-8431, SFF-8472, and SFF-8432 MSA (Multi-Source Agreement) specifications, ensuring compatibility with standard SFP28 host systems supporting multiple vendor equipment platforms. Our 25G BiDi SFP28 80km transceiver can be encoded to be compatible and successfully operate in different 80+ brands of equipment. The module incorporates comprehensive DDM/DOM (Digital Diagnostic Monitoring) functionality providing real-time information including transmitted and received optical power levels, module temperature, bias current, and supply voltage. This diagnostic data is available via MSA-compatible EEPROM interface, enabling continuous monitoring of both wavelength channels on ultra-long single-fiber links.

The module operates within a 0 to 70°C temperature range with maximum power consumption of 2.2W, optimized for deployment in controlled environment data centers and telecom facilities. The EML laser technology provides exceptional output power from -2 to 7 dBm at 1309.14nm with outstanding extinction ratio of 8 dB minimum, ensuring superior signal quality and chromatic dispersion tolerance over 80km distances. The APD photodiode receiver delivers enhanced sensitivity of -29 dBm at 1295.56nm wavelength with precise 2.1nm wavelength bandwidth, providing superior signal detection compared to PIN-based alternatives. The receiver overload protection at 5 dBm ensures safe operation across varying link conditions while maintaining wavelength isolation between transmit and receive paths. The transceiver achieves multi-vendor interoperability through adherence to SFP28 MSA standards, though equipment with vendor-specific module validation may require custom EEPROM programming for compatibility.

Our 25G BiDi SFP28 80km transceiver is CE/RoHS certified and compliant with Class 1 FDA and IEC60825-1 laser safety standards. Typical applications include fiber-scarce regional networks, inter-city connections with limited fiber availability, service provider backbone systems where fiber lease costs are substantial, and enterprise WAN deployments requiring both maximum reach and fiber efficiency. The combination of BiDi technology, EML laser, and APD receiver represents the optimal solution for scenarios demanding both ultra-long distance and single-fiber operation. The multi-rate capability accommodates legacy 10 Gigabit Ethernet operation alongside native 25 Gigabit rates, providing operational flexibility for mixed-speed network deployments. Because our focus is providing top quality service, we perform rigorous quality checks before delivery including optical parameter measurements at both wavelengths, EML bias optimization, APD sensitivity validation, wavelength isolation testing, connector cleanliness tests, and SFP28 transceiver EEPROM memory data validation tests, ensuring reliable 80km bidirectional operation in matched transceiver pairs.