Fiber optic technology relies on transmitting data as light pulses through thin strands of glass or plastic. This process involves several key principles: * Total Internal Reflection: Light signals are guided along the fiber’s core due to total internal reflection. This occurs when light strikes the boundary between the core and cladding (outer layer) at an angle greater than the critical angle, causing the light to be reflected back into the core. * Light Source: Lasers or LEDs are used to generate the light pulses that carry the data. Lasers provide a more focused and powerful light source, enabling longer transmission distances and higher data rates. * Optical Fiber Structure: The fiber consists of a core, which carries the light, and a cladding, which surrounds the core and has a lower refractive index. This difference in refractive index is crucial for total internal reflection. * Data Encoding: Data is encoded into the light pulses by modulating the light source. This can be done by varying the intensity, frequency, or phase of the light. * Signal Detection: At the receiving end, photodetectors convert the light pulses back into electrical signals, which are then decoded to retrieve the original data.