FSO systems are speedily attaining attractiveness for delivering various communication services and have become one of the preferred high-speed media. The primary challenge for FSO systems is atmospheric conditions that result in degradation of signal strength. In this paper, the impact of advance line-coding over FSO link subjected to different turbulent conditions has been investigated. The proposed system has accomplished a useful improvement under the impact of diverse turbulence conditions due to the implementation of CSRZ and AMI coding over FSO link of 9 Km at high data rate.