Fiber-optic communication, also known as fiber-optic communication, refers to a way of transmitting information using optical and optical fibers. It is a kind of wired communication. Light can carry information after modulation. Since the 1980s, fiber-optic communication systems have revolutionized the telecommunications industry and played a very important role in the digital age. Optical fiber communication has large transmission capacity and good confidentiality. Fiber-optic communication has now become the most important form of wired communication today. Transmitting the information to be transmitted to the transmitter at the transmitting end, superimposing or modulating the information onto the carrier as the information signal carrier, and then transmitting the modulated carrier to the remote receiving end through the transmission medium, and demodulating by the receiver The original information.