Fiber Optic Cable
Advantages
It can handle much higher bandwidth than copper. Due to the low attenuation, repeaters are needed only about every 30 Km on fiber lines, versus about every 5 km for copper.
Fiber is not affected by power surges, electromagnetic interference, or power failures. Nor is it affected by corrosive chemicals in the air, making it ideal for factory environments where electrical interference is very high.
Fiber is lighter than copper. One thousand twisted pairs copper cables of 1 km long weigh 800 kg. But fibers have only 100 kg.
Fibers do not leak light and are quite difficult to tap. This gives them excellent security against potential wire-tappers.
Disadvantages
Fiber is an unfamiliar technology requiring skills which may not be easily available.
Since optical transmission is inherently unidirectional, two-way communication requires either two fiber cables or two frequency bands on one fiber.
Fiber interfaces cost more than electrical interfaces.
0 comments:
Post a Comment