While it is technically possible to use a multimode SFP with single-mode fiber, it is fraught with challenges and potential performance issues. The mismatch in core sizes, potential signal loss, and suboptimal wavelength compatibility make this setup less than ideal for most. A single mode SFP transceiver is an optical module that uses laser-based transmission over single mode fiber to deliver long-distance, high-speed data communication, typically at 1310nm or 1550nm wavelengths. It utilizes ultra-low optical attenuation for medium to long transmission. This type. An SFP module serves as the interface between networking equipment and fiber optic cabling. The type of cable you use determines how the light travels, the distance you can run the signal, the cost, and the environment it is used in.