25G SFP28 20km SMF Transceiver: 25G-SFP28-20

Our EDGEOPTIC 25G-SFP28-20 is a multi-vendor compatible 25G SFP28 dual-fiber optical module designed for extended-reach 25 Gigabit Ethernet applications operating over single-mode fiber cabling. The 25G-SFP28-20 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 25G SFP28 20km transceiver utilizes DML (Directly Modulated Laser) technology for transmission and PIN photodiode for receiving, providing cost-effective extended-reach connectivity for metropolitan area networks and inter-facility connections.

The transceiver ensures an 8 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 20 kilometers, making it ideal for metropolitan deployments, campus backbone extensions, and service provider access networks. 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 FEC support enhances signal integrity and maintains error-free transmission across the full 20km reach, compensating for chromatic dispersion effects at extended distances.

25G-SFP28-20 compatible extended-reach 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 25G SFP28 20km 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 for proactive network management.

The module operates within a 0 to 70°C temperature range with maximum power consumption of 1.2W, optimized for deployment in controlled environment data centers and telecom facilities. Standards compliance includes IEEE 802.3cc specifications for 25 Gigabit Ethernet, supporting both 10G Ethernet (10.31 Gbps) and 25G Ethernet (25.78 Gbps) applications. The DML laser technology provides excellent spectral characteristics with minimum extinction ratio of 3.5 dB, ensuring stable signal quality for extended-reach applications. The 40nm receiver wavelength bandwidth accommodates signal variations while maintaining receiver sensitivity between -13 dBm and 2 dBm. 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 20km transceiver is CE/RoHS certified and compliant with Class 1 FDA and IEC60825-1 laser safety standards. Typical applications include metro edge deployments, data center interconnects, enterprise campus backbones, 5G fronthaul networks, and carrier access networks. 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 bandwidth upgrades. Because our focus is providing top quality service, we perform rigorous quality checks before delivery including optical parameter measurements, connector cleanliness tests, and SFP28 transceiver EEPROM memory data validation tests, ensuring optimal performance across the entire 20km transmission distance.