Optical Amplifier Theory

An optical amplifier is a device that boosts light signals in fiber optic communication systems without converting them to electrical signals. It works by using a gain medium, often made from specially doped glass or other materials, energized by an external light source. When a weak light signal passes through the gain medium, it stimulates the medium to emit more light, amplifying the signal. This allows the transmission of data over long distances with minimal loss, improving the performance and reach of the communication network, essential for internet and telecommunications.