Degradation Measures in Free Space Optical Communication (FSO) and it's Mitigation Techniques - A Review

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Unlike radio and microwave systems, Free Space Optics (FSO) is an optical technology which requires no spectrum licensing or frequency coordination with other users and provides secure transmission because of negligible interception by using point-to-point laser signals in conjunction with low errors than that of optical fiber transmission. This paper is an endeavor to thrash out about internal and external parameters that degrade the performance of FSO systems in conjunction with the alleviation techniques to realize a high speed, bandwidth efficient long haul FSO transmission system.