A single mode SFP transceiver is a hot-swappable optical module designed to transmit and receive data over single mode fiber (SMF). It is commonly used in Ethernet and fiber optic networking equipment such as switches, routers, and media converters. Power Consumption CLASS 1 LASER PRODUCT, IEC/EN 60825-1:2014 Do not look into the ends of the fiber optic cable or SFP module while converters are. In this guide, you will learn what a single mode SFP transceiver is, how it works, the key specifications and types available, and where it is commonly used. They enable flexible, high-speed connectivity by converting electrical signals to optical signals and back again. The two primary types are Single-Mode (SMF) and Multimode (MMF), each designed for specific purposes. Fiber Type: Single-mode fiber uses one mode of light to propagate through the fiber.