Evaluation of Various Optical Filters and Novel Modulation Technique in a 5^th Generation Free Space Optical System

The continuous demand for higher data rates and wider bandwidth has driven the development of advanced communication systems, particularly in the field of free-space optical communication. It is crucial to evaluate various optical filters and novel modulation techniques to optimize the performance of 5<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> generation free-space optical (FSO) systems. Multiple optical filters, such as Butterworth, Bessel, rectangle, and Gaussian filters, are used for analyzing the performance. The results exhibited the highest level of quality factor. The present design has improved beam divergence and optical distance in comparison to its predecessor. The proposed architecture achieved the highest Q factor in terms of the optical wavelength and the size of the Transmitter and Receiver apertures. The achievement was made by utilizing an electro-absorption modulator and several optical filters, which led to a data rate of 20 gbps. Upon conducting tests using multiple optical filters in combination with optical amplifiers, it was determined that the Gaussian optical filter exhibits the highest quality factor.