Fiber optic connectors can be categorized according to different standards such as utilization, fiber count, fiber mode, and transmission method. In fiber-optic communication, a single-mode optical fiber, also known as fundamental- or mono-mode, is an optical fiber designed to carry only a single mode of light - the transverse mode. This. There are various types of single-mode fiber connectors available in the market, each with its own unique characteristics and applications. Over time, about 100 different types of optical.