FIR-FSOC in Challenging Atmospheric Conditions Considering Various Modulation Scheme

In free-space optical communication (FSOC) there is a wide variety of wavelengths to choose from which the transmission of information should happen. But in general, longer wavelengths like IR show better performance than shorter wavelengths. In the experiment of comparing propagation properties of different wavelengths in the atmosphere, challenges can hamper its wide distribution during implementation. Among all these long wavelengths the 10μm seems to be the most efficient performance as it suffers less attenuation in different weather conditions than other visible rays and offers high link reliability. Short wavelength like 532nm has great data bandwidth rate but in real-life transmission, the loss of this short wavelength ray is higher than compared to longer ones. Also, shorter wavelengths are more prone to hazardous to human safety than the longer ones. This research substantially improves Free Space Optical Communication (FSOC) by showing that the BER at every Modulation technique of the 10μm infrared ray is always lower than the 0.532μm visible ray and above all the technique the Binary Phase-Shift Keying (BPSK) modulation technique shows less signal loss while transmitting data through the created total atmospheric condition as propagation channel. So, it is observed that 10μm infrared ray is the most efficient one to transfer data at FSOC. This research opens the door for more sophisticated FSOC applications in fields where current forms of communication fall short.