Laser transmitter and circuit

Since optical fiber has the characteristics of long distance signal transmission and low transmission loss, in recent years, optical fiber has been used to replace coaxial cables for
the transmission of television signals and data signals. There is a light transmitter at the transmitting end of the transmission, which converts the electrical signal to be transmitted into a laser signal . The laser signal is transmitted through the optical fiber. At the signal receiving end, the optical signal
is converted into an electrical signal through an optical receiver and recovered. , the figure shows the circuit and components of a typical laser transmitter .