Hermite-Gaussian mode in spatial division multiplexing over FSO system under different weather condition based on linear Gaussian filter

The wireless telecommunication system of hybrid free-space optics (FSO) utilizes a transmission medium of free space to transmit data at high bit rates. However, it is exposed to various effects of noise in different weather conditions. This paper investigates on compensation for atmospheric turbulence in optical communication systems of 10-channels spatial division multiplexing (SDM) over FSO link under different weather conditions based on linear Gaussian filter (LGF). The performance of a 10-channel transceiver system is evaluated in an SDM-FSO link under the clear sky, haze, and rain weather conditions based on Gaussian filter at the receiver. Furthermore, the simulated system has transmitted 100 Gbit/s up for a distance of 12 km FSO in superbly very clear weather condition. Moreover, it is also transmitted 100 Gbit/s up for a distance of 4.2 km FSO during heavy rain and up to 1.1 km distance FSO during heavy haze. The results show that system capacity is effectively increased with the use of SDM that operate at 1550 nm wavelength. Finally, the validation is conducted based on analyzing eye diagrams, Q-Factor and Bit Error Rates