The demodulator converts the electronic signals back into their original video, audio, data, or other format. The electrical interface displays the user output. 2.2 Benefits Optical fiber is faster and more secure than copper wire. Light signals suffer much less attenuation over distances than electronic signals do. This eliminates the need to periodically retransmit signals.
Fiber optics can carry much more information than copper wire.
Fiber optic systems are much freer from interference, suffer little transmission loss, and are not affected by lightning. Fiber optic systems offer much more privacy, as they cannot be tapped without detection. For a fiber carrying just one channel, speeds can reach 10 Gbps. These speeds are fast enough for HDTV, satellite imagery, medical imagery, and meteorological data. In an asynchronous network, the internal clock source of each network element times its transmitted signal.