What type of signal do fiber optic cables transmit?

Fiber optic cables transmit optical signals, which are light signals. This characteristic is fundamental to their operation and design. Unlike electrical signals that flow through copper wires, fiber optic signals use light to carry information over long distances with minimal loss. The core of a fiber optic cable is made of glass or plastic, which allows light to be transmitted through total internal reflection. This mechanism is what makes fiber optics an efficient medium for communication, particularly in telecommunications where high-speed data transmission is essential.

Optical signals have several advantages, including higher bandwidth capacity and resistance to electromagnetic interference, which can affect electrical signals transmitted through metal cables. By utilizing light, fiber optic cables can achieve faster data rates and longer transmission distances compared to traditional conductive materials.

Understanding that fiber optics operate on the principle of transmitting light, as opposed to other types of signals, is crucial for grasping how advancements in communication technology have evolved. The ability to carry large amounts of data efficiently and securely is why optical signals are preferred in modern data networks.