Discover high-performance single mode SFP modules for your network. Compatible with major brands like Cisco, Ubiquiti, and more. SFP (Small Form-factor Pluggable) is a compact, hot-pluggable network interface module used to connect network devices (switches, routers, firewalls) to fiber optic or copper cables. Think of it as the “translator” for your network equipment, converting electrical signals into optical signals. Single-mode SFP and multimode SFP are the two main types of hot-pluggable optical transceivers used in fiber optic networks. Both of them use LC connectors and are collectively referred to as LC SFP transceivers. The primary differences between them are the types of fiber they support and their. How to Identify Whether My SFP is Single-Mode or Multimode? If you're dealing with Small Form-factor Pluggable (SFP) modules, you may find yourself needing to identify whether it's single-mode or multimode. The distinction is important as it affects network performance, distance, and overall cost. A single-mode SFP is specially used with the 9/125µm single-mode fiber (SMF) but can not be used with multimode fiber cable. It utilizes ultra-low optical attenuation for medium to long transmission. Optical and copper models can be used on a wide variety of Cisco. Laser diodes, for example, Distributed Feedback (DFB) lasers, drive single-mode SFP modules because of their precision and narrow spectral emission at wavelengths such as 1310 nm or 1550 nm.