25G SFP28 CWDM 1271-1371nm 10km Single-Mode Fiber Transceiver

• Supports data rates up to 25.78Gb/s
• Transmission distance of up to 10km
• CWDM wavelength range from 1271nm to 1371nm
• Designed for 9/125μm single-mode fiber
• CWDM DFB laser transmitter
• PIN photodiode with transimpedance amplifier receiver
• Standard hot-pluggable SFP28 form factor
• Duplex LC optical interface
• Single +3.3V power supply
• Supports Digital Diagnostic Monitoring
• SFF-8472-compliant management interface
• Commercial and extended-temperature options
• Commercial: 0°C to +70°C
• Extended: -20°C to +85°C
• Designed according to SFP28 specifications
• IEEE 802.3cc compliant

• 25G Ethernet networks
• CWDM optical networks
• CPRI fronthaul and transport links
• Data center network interconnection
• Data center access and aggregation
• 25G single-mode fiber connectivity
• Metro network applications
• Network capacity expansion
• High-density SFP28 switch deployments

FiberMania provides OEM and customized manufacturing services for 25G SFP28 CWDM optical transceivers. Customizable options can include CWDM wavelength selection, host equipment compatibility, EEPROM coding, DDM parameters, operating temperature grade, product labeling, housing identification, packaging, and other project-specific requirements.

For CWDM network deployments, customers can specify the required wavelength according to their MUX/DEMUX channel plan. Sample units can also be supplied for compatibility testing with switches, routers, CPRI equipment, and other 25G networking platforms before volume production.

Q1. How does CWDM improve fiber utilization in a 25G network?

CWDM allows multiple optical signals at different wavelengths to travel over the same fiber infrastructure. Instead of dedicating a separate fiber pair to every optical channel, multiple wavelength channels can share the available fiber, helping increase capacity and reduce the need for additional fiber resources.

Q2. How should the 1271nm to 1371nm wavelength be selected?

The required wavelength should be determined by the CWDM system’s channel plan. When the transceiver is used with a CWDM MUX/DEMUX, its wavelength must correspond to the appropriate channel of the optical multiplexer and demultiplexer. The selected wavelength should therefore be confirmed before ordering.

Q3. Can this transceiver be used with a CWDM MUX/DEMUX?

Yes. The module is designed for CWDM applications and can be integrated with compatible CWDM MUX/DEMUX systems. The selected transceiver wavelength must match the intended CWDM channel, and the insertion loss of the optical components should be considered when calculating the complete link budget.

Q4. What is the difference between the commercial and extended-temperature versions?

The two versions are designed for different operating environments. The commercial version supports 0°C to +70°C and is generally suitable for controlled indoor deployments, while the extended-temperature version supports -20°C to +85°C and provides greater tolerance for environments with wider temperature variations.

Q5. Is the 10km reach guaranteed regardless of the CWDM wavelength?

No. The 10km rating assumes suitable optical link conditions. Actual reach can vary depending on fiber attenuation at the selected wavelength, connector and splice losses, CWDM MUX/DEMUX insertion loss, optical power budget, and the characteristics of the connected equipment.

Q6. Can a specific CWDM wavelength be supplied for an existing network?

Yes. FiberMania can provide wavelength-specific configurations for B2B projects. Customers can provide their existing CWDM channel plan or MUX/DEMUX specifications so the appropriate transceiver wavelength can be selected and compatibility evaluated.