Effect of Carbon Dioxide on SDR-Based Modulated Optical Beams for Free Space Optical Link

The basic atmospheric phenomena (mainly fog) influencing the optical beams, which were generated by a laser diode at a wavelength of 650 nm and 850 nm, will be introduced in this article. Also, the possibilities of the Software Defined Radio utilization, which can create different types of modulation (M-Quadrature Amplitude Modulation, M-Phase-Shift Keying) and can be used for evaluation of the influences of artificial atmospheric effect on the modulated optical beam in the acrylate box, will be presented. The Modulation Error Ratio is selected as the evaluation and communication parameter, depending on the Carbon dioxide exposure in the timeline. This is particularly strong communication jamming to the rise of wireless communication when the Carbon dioxide does not have an effect to such an extent.