25GBASE-ER SFP28 Compatible Transceiver: 25G-SFP28-40

Our EDGEOPTIC 25G-SFP28-40 is a multi-vendor compatible 25GBASE-ER SFP28 dual-fiber optical module designed for long-haul 25 Gigabit Ethernet applications operating over single-mode fiber cabling. The 25G-SFP28-40 module operates at 1310nm wavelength for both transmission and reception, with data rates from 8.5 to 28.1 Gbps supporting multiple protocol standards and applications. Our 25GBASE-ER SFP28 transceiver utilizes DML (Directly Modulated Laser) technology for transmission and APD (Avalanche Photodiode) for receiving, delivering superior sensitivity and extended reach performance for metropolitan and regional network deployments.

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 transmission up to 40 kilometers, making it ideal for metropolitan area networks, regional interconnects, and service provider backbone applications. 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 combination of APD receiver technology and FEC support enables exceptional reach while maintaining error-free transmission across challenging optical paths.

25G-SFP28-40 compatible 25GBASE-ER module is hot-pluggable SFP28 with duplex LC/UPC connectors as an optical interface. The electrical interface conforms to SFF-8431 and SFF-8432 MSA (Multi-Source Agreement) specifications, ensuring compatibility with standard SFP28 host systems supporting multiple vendor equipment platforms. Our 25GBASE-ER SFP28 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 per SFF-8472 specifications, enabling continuous monitoring of transceiver operational parameters critical for long-haul applications.

The module operates within a 0 to 70°C temperature range with maximum power consumption of 1.5W, optimized for deployment in controlled environment data centers and telecom facilities. Standards compliance includes IEEE 802.3cc specifications for 25 Gigabit Ethernet, CPRI Option 10/eCPRI for wireless fronthaul applications, supporting both 10G Ethernet (10.31 Gbps) and 25G Ethernet (25.78 Gbps) applications. The DML laser technology provides robust output power from 0 to 6 dBm with enhanced extinction ratio of 4 dB minimum, while the APD photodiode delivers exceptional receiver sensitivity of -19 dBm, crucial for maintaining signal integrity over 40km distances. 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 SFP28 ER transceiver is CE/RoHS certified and compliant with Class 1 FDA and IEC60825-1 laser safety standards. Typical applications include metro core networks, data center interconnects, 5G xHaul deployments, regional backbone connections, and carrier-class transport systems. The CPRI Option 10/eCPRI compliance makes it particularly suitable for mobile network infrastructure requiring precise timing and low latency. The multi-rate capability accommodates legacy 10 Gigabit Ethernet operation alongside native 25 Gigabit rates, providing operational flexibility for mixed-speed network deployments and seamless migration strategies. Because our focus is providing top quality service, we perform rigorous quality checks before delivery including optical parameter measurements, APD bias optimization tests, connector cleanliness tests, and SFP28 transceiver EEPROM memory data validation tests, ensuring optimal performance across the entire 40km transmission distance.