Advantages of Optical Fiber Communications



1. Wide bandwidth
. The light wave occupies the frequency range between 2 x 1012 Hz to 3.7 x 1012 Hz. Thus the information carrying capability of fiber optic cables much higher.
2. Low losses
. Fiber optic cables offers very less signal attenuation over long distances. Typically it is less than 1 dB/km. This enables longer distance between repeaters.
3. Immune to cross talk
. Fiber optic cables has very high immunity to electrical and magnetic field. Since fiber optic cables are non-conductors of electricity hence they do not produce magnetic field. Thus fiber optic cables are immune to cross talk between cables caused by magnetic induction.
4. Interference immune
. Fiber optic cables are immune to conductive and radiative interferences caused by electrical noise sources such as lighting, electric motors, fluorescent lights. 
5. Light weight
. As fiber cables are made of silica glass or plastic which is much lighter than copper or alluminium cables. Light weight fiber cables are cheaper to transport.
6. Small size
. The diameter of fiber is much smaller compared to other cables, therefore fiber cable is small in size, require less storage space.
7. More strength
. Fiber cables are stronger and rugged hence can support more weight.
8. Security
. Fiber cables are more secure than other cables. It is almost impossible to tap into a fiber cable as they do not radiate signals.No ground loops exist between optical fibers hence they are more secure.
9. Long distance transmission
. Because of less attenuation transmission at a longer distance is possible.
10. Enviroment immune
. Fiber cables are more immune to environmental extremes. They can operate over a large temperature variations. Also they are not affected by corrosive liquids and gases.
11. Safe and easy installation
. Fiber cables are safer and easier to install and maintain. They are non-conductive hence there is no shock hazards as no current or voltages is associated with them. Their small size and light weight feature makes installation easier.
12. Less cost
. Cost of fiber optic system is less compared to any other system.

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