Different 1310nm SFP modules are designed for various applications and reach requirements. Distance: Up to 2 kilometers (km). This makes it widely adopted in data centers, enterprise backbones, and metro access. The distance that a 1310nm SFP (Small Form-Factor Pluggable) transceiver module can reach depends on the specific type and standard of the module. Here are some common types: Reach: Typically used for. There are three wavelength windows for 10G optical module communication applications, namely the 850nm window, 1310nm window, and 1550nm window. In practical single-mode. Max. Moreover, these three wavelengths have almost zero absorption and.