In today’s advanced technology, microwave and optical communication techniques are developing quickly, which perform multifunctioning in real-time applications. It is generally shown a vital role to perform efficient transport capacities. The free space optical communication technology is implemented with unlicensed bands to offer appealing bandwidth augmentation. The suitable communication system is designed for effective FSO transmission to avoid the effect of exterior environment conditions such as fog, snow, light, medium, and severe rain. The main intention of this paper is, to design the advanced level OFDM modulator, advanced carrier-suppressed return-to-zero modulator to improve the communication performance. By optimization the FSO system, the quality of signals measure with Q-factor, and the eye diagrams can be analyzed with an eye analyzer to verify the FSO systems.