Some of them are high bandwidth, less weight, reduced operating power, smaller in size.
Also optical fibers are vulnerable to lightning and independent of electromagnetic interferences.
Today usage of optical fiber is only limited to high data rate and long distance links due to the high cost of glass fiber related equipments.
But low data rate and short distance optical fiber links have many interesting applications
although some of them are still not completely identified.
Multimode Plastic fiber is introduced in order to replace the high cost glass fiber in short distance low capacity links.