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C. PALANIAPPAN1,* , S. ROBINSON1
Free space optical (FSO) communication is a green wireless data transmission technique that utilises light beams as a modulated carrier and is known for its high capacity. Numerous advantages of FSO technology include compatibility with unlicensed frequency bands, reduced latency, inexpensive installation costs, and large bandwidth. Because of this, it can be used for both the first and last terminal connections. However, weather induced attenuation, especially from rain, fog, and haze, can weaken the signal to noise ratio (SNR) and restrict the performance of FSO systems. This work proposes a MIMO FSO (Multiple Input Multiple Output FSO) system coupled with double and triple boost optical amplifiers to improve transmission quality and signal power, thereby addressing these issues. The system's performance is evaluated at three standard wavelengths 850 nm, 1310 nm, and 1550 nm using non return to zero (NRZ) modulation. Experimental results show that a 32×32 MIMO configuration with a triple stage amplifier at 1550 nm achieves a maximum transmission distance of 114.8 km under clear weather conditions. The system maintains operable ranges of 14.84 km in rain, 10.48 km in fog, and 8.32 km in haze in unfavourable environments. The system's dependability across various atmospheric conditions is confirmed by thorough evaluations of the Q factor, bit error rate (BER), and eye diagrams.
FSO, MIMO, NRZ, Boost Amplifiers, BER, Q factor.
C. PALANIAPPAN, S. ROBINSON, Performance enhancement of MIMO FSO communication systems using hybrid optical amplifiers, Optoelectronics and Advanced Materials - Rapid Communications, 20, 3-4, March-April 2026, pp.141-159 (2026).
Submitted at: Oct. 4, 2025
Accepted at: April 8, 2026
Optoelectronics and Advanced Materials - Rapid Communications
(2024): Impact Factor = 0.4 - Journal Citation Reports (Clarivate Analytics, 2025)
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