25G BiDi SFP28 40km Industrial Transceiver (Side A): BIDI-25G-SFP28-40AI

Our EDGEOPTIC BIDI-25G-SFP28-40AI is a multi-vendor compatible industrial-grade 25G BiDi SFP28 single-fiber optical module designed for long-haul 25 Gigabit Ethernet applications in harsh environmental conditions. The BIDI-25G-SFP28-40AI module transmits at 1270nm wavelength and receives at 1310nm wavelength, with data rates from 8.5 to 28.1 Gbps supporting multiple protocol standards and applications. Our industrial 25G BiDi SFP28 40km transceiver utilizes DML (Directly Modulated Laser) technology for transmission and PIN photodiode for receiving, engineered specifically for bidirectional communication over single fiber with extended reach in extreme temperature environments.

The transceiver ensures a 19 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 40 kilometers, making it ideal for outdoor metropolitan deployments, industrial backbone networks, and critical infrastructure where both fiber conservation and 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 robust BiDi architecture maintains consistent 40km reach performance across extreme temperature variations, requiring pairing with the complementary BIDI-25G-SFP28-40BI module for proper operation.

BIDI-25G-SFP28-40AI compatible industrial long-haul BiDi module is hot-pluggable SFP28 with single LC/UPC connector as an optical interface, providing 50% fiber infrastructure reduction while meeting stringent industrial reliability requirements. The electrical interface conforms to SFF-8431, SFF-8432, and SFF-8472 MSA (Multi-Source Agreement) specifications, ensuring compatibility with standard SFP28 host systems supporting multiple vendor equipment platforms. Our industrial 25G BiDi SFP28 40km 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 bidirectional performance across extended distances and extreme temperature variations.

The module operates within an extended industrial temperature range of -45°C to +85°C, with maximum power consumption of 1.5W, specifically designed for deployment in uncontrolled environments including outdoor cabinets, remote cell sites, utility infrastructure, and transportation networks. The enhanced thermal design ensures stable DML laser operation at 1270nm with output power from 0 to 6 dBm and maintains the 3.5 dB minimum extinction ratio across the entire temperature spectrum while preserving 40km reach. The PIN photodiode receiver maintains sensitivity of -19 dBm at 1310nm even at temperature extremes, with 20nm receiver wavelength bandwidth ensuring proper channel isolation. Standards compliance includes CPRI Option 10/eCPRI specifications for wireless fronthaul applications, supporting both 10G Ethernet (10.31 Gbps) and 25G Ethernet (25.78 Gbps) applications.

Our industrial 25G BiDi SFP28 40km transceiver is CE/RoHS certified and compliant with Class 1 FDA and IEC60825-1 laser safety standards. Typical applications include outdoor 5G xHaul deployments leveraging CPRI/eCPRI capabilities, smart grid backbone communications, railway signaling systems, oil and gas pipeline monitoring, and mining operations where both fiber scarcity and extended reach converge with harsh environmental challenges. The combination of BiDi technology and industrial hardening makes it particularly suitable for metropolitan-scale deployments in extreme conditions where fiber availability is limited. 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 extensive environmental testing including thermal cycling, vibration resistance, humidity exposure tests, wavelength stability verification across temperature range, in addition to optical parameter measurements, connector cleanliness tests, and SFP28 transceiver EEPROM memory data validation tests.