Single mode fiber(SMF) is a type of fiber optic cable that only allows one light mode to transmit at a time. Generally, single mode cable has a narrow core diameter of 8 to 10µm (micrometers), which can propagate at the wavelength of 1. Single mode fiber(SMF) is a type of fiber optic cable that only allows one light mode to transmit at a time. Generally, single mode cable has a narrow core diameter of 8 to 10µm (micrometers), which can propagate at the wavelength of 1310nm and 1550nm. Modes of light can only propagate through single mode fiber optic cables due to their small core. As we all know, multimode fiber is usually divided intoOM1, OM2, OM3, OM4 and OM5fiber types. When it comes to single mode fiber types, it can be categorized into OS1 and OS2 fiber, which are SMF fiber specifications. OS1 fiber is mainly used in the construction of indoor applications, such as campus networks and building networks, where the maximu. It's of great significance to figure out the difference between OS1 and OS2 when conducting deployments. The specification table below will present the differences between them clearly.Pros: 1. Transmission distance: single mode fiber supports a greater distance than multimode fiber because of its lower attenuation. For example, multimode fiber generally has a reach of several hundred meters, whereas single mode fiber has the potential to reach 200 km. 2. Bandwidth capacity: single mode fiber supports high bandwidths and high spe. Single mode cable is mostly used in several applications where to need only one cable for sending at the multi-frequency (WDM Wave-Division-Multiplexing); such as – 1. Local area network as well as point to point links in many cities 2. One and multiple buildings 3. Small and medium scale companies 4. College campuses.