25G CWDM SFP28 20km Transceiver: CWDM-25G-SFP28-15

Our EDGEOPTIC CWDM-25G-SFP28-15 is a multi-vendor compatible 25G CWDM SFP28 dual-fiber optical module designed for wavelength division multiplexed 25 Gigabit Ethernet applications operating over single-mode fiber cabling. The CWDM-25G-SFP28-15 module supports transmission across 14 CWDM channels from 1270nm to 1610nm with 20nm channel spacing, with data rates from 8.5 to 28.1 Gbps supporting multiple protocol standards and applications. Our 25G CWDM SFP28 transceiver utilizes DML (Directly Modulated Laser) technology for transmission and APD (Avalanche Photodiode) for receiving, delivering cost-effective wavelength division multiplexing for metropolitan and campus network deployments.

The transceiver ensures a 14 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 CWDM-based metro access networks, campus interconnects, and service provider deployments requiring wavelength multiplexing. 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 CWDM architecture enables up to 14 channels of 25G traffic over a single fiber pair, dramatically increasing network capacity without additional fiber infrastructure.

CWDM-25G-SFP28-15 compatible wavelength-specific module is hot-pluggable SFP28 with duplex LC/UPC connectors as an optical interface. 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 25G CWDM 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, enabling continuous monitoring of transceiver operational parameters essential for wavelength-specific channel 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 stable output power from 0 to 5 dBm with minimum extinction ratio of 3.5 dB across all supported CWDM channels. The APD photodiode receiver delivers enhanced sensitivity of -14 dBm with wide-band reception capability spanning the entire CWDM grid from 1270nm to 1610nm, enabling flexible channel assignment and simplified inventory management. 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 CWDM SFP28 transceiver is CE/RoHS certified and compliant with Class 1 FDA and IEC60825-1 laser safety standards. Typical applications include metro edge deployments, enterprise campus wavelength routing, data center interconnects utilizing CWDM multiplexing, and service provider access networks requiring spectral efficiency. The CWDM capability enables operators to deploy up to 14 independent 25G channels over existing fiber infrastructure, providing a cost-effective upgrade path to 350 Gbps aggregate capacity per fiber pair. 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 across all CWDM channels, wavelength accuracy verification, connector cleanliness tests, and SFP28 transceiver EEPROM memory data validation tests, ensuring reliable 20km transmission at the specified wavelength.