Optical modulation

Optical modulation is a technology that controls light signals to transmit information. It involves changing specific properties of a light wave—such as its intensity, phase, or frequency—in a precise way that encodes data. This modulated light is then sent through optical fibers or free space to carry information like internet data or telephone calls. Think of it as a communication method where light is used as a carrier, and the modulation acts like a switchboard, turning the light on and off or changing its characteristics to represent different data bits efficiently and accurately.