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The Free space optical communication technology tries to fulfill rising need for high bandwidth transmission capability link along with security and ease in installation. Due to their high carrier frequency in the range of 300 THz, it provides highest data rates of 2.5 Gbps which can be increased to 10 Gbps using Wavelength Division Multiplexing (WDM). FSO link is license free, secure, and easily deployable and offers low bit error rate link. These features motivate to use FSO as a solution to last mile access. Along with these attractive features of FSO, a well-known disadvantage of (FSO) is its sensitivity on local weather conditions which results in loss of optical signal power.
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