Your signal needs only one fiber cable to be transmitted, I don't know any other cables could hold such speed (please if any one knows other cables tell us), also attenuation and distortion is the least.
High noise immunity
super low line loss (as mentioned)
least chances of interference (since light cannot be altered by RF)
no skin effect
no crosstalk
high channel bandwidth possible
I may add that Optic fiber is only such meadium where one can launch both analog and digital signals with equally good fidelity.The Upper Freq limit is (theoriticaly) Infinity!! FO cables are more immune to cross-talk.
The greatest advantage is with the amplifiers. Long-haul FOC uses passive amplifiers, ie., there is a "Amplifier" peice of FO cable (passive) wherein the signal is automatically 'boosted' just by travelling through it !!!!!
Immunity to Electromagnetic Interference
Data Security
Non Conductive Cables
Eliminating Spark Hazards
Ease Of Installation
High Bandwidth Over Long Distances