A:Optical fiber has a big advantage over existing copper wire when it comes to longer distances of > 100 meters, especially in high demand applications. However, in certain situations fiber may be used for shorter distances for low bandwidth applications, due to these important features:
a. Immunity to electromagnetic interference, including nuclear electromagnetic pulses.
b. High electrical resistance, making it safe to use near high-voltage equipment or between areas with different earth potentials.
c. Lighter weight—important, for example, in aircraft.
d. No sparks—important in flammable or explosive gas environments.
e. Not electromagnetically radiating, and difficult to tap without disrupting the signal—important in high-security environments.
f. Much smaller cable size—important where pathway is limited, such as networking an existing building, where smaller channels can be drilled and space can be saved in existing cable ducts and trays.
g. Resistance to corrosion due to non-metallic transmission media.