Hi,
here are some ADVANTAGES OF FSO SYSTEMS
No licensing required.
Installation cost is very low as compared to laying Fiber.
No sunk costs.
No capital overhangs.
Highly secure transmission possible.
High data rates, upto 2.5 Gbps at present and 10 Gbps in the near future.
Disadvantage of Fso Systems are:
Absorption and scattering can both occur whenever there is a lot of moisture in the air. Absorption of the signal causes a decrease in signal strength. Scattering does not cause a decrease in signal strength, but rather causes the signal to be sent off in different directions. This is an issue particularly over long distances.
Thanks,