Correct option is A
Optical fiber transmission uses light signals to transmit data over long distances. The source of light in an optical fiber transmission system plays a critical role in the performance of the system. Among the options listed:
LED (Light Emitting Diode) – This is the most commonly used light source in optical fiber communication systems, especially in short-distance transmission. LEDs provide a reliable, stable light source with relatively lower power consumption and are ideal for fiber-optic systems where cost-effectiveness and ease of operation are important.
