The Optical Layer is a crucial part of telecommunications that focuses on the transmission of data using light signals. It operates primarily through fiber optic cables, which allow for high-speed data transfer over long distances. This layer is responsible for converting electrical signals into optical signals and vice versa, enabling efficient communication. In the context of the OSI Model, the Optical Layer corresponds to the physical layer, where the actual transmission of data occurs. Technologies like Wavelength Division Multiplexing (WDM) are often used to enhance capacity by allowing multiple signals to travel simultaneously on the same fiber, maximizing the use of available bandwidth.