Enhancing of multiwavelength free space optical communication system via optimizing the transceiver design parameters

In this paper, the performance of multiwavelength free space optical (MFSO) communication system is enhanced via optimization of the transceiver design parameters. The performance of the proposed system is investigated and compared with the previous work under the same weather condition, as well as with and without misalignment losses (ML). The optimum transceiver design parameters of the proposed system are 15 cm, 20 cm and 1 mrad for transmitter, receiver diameter and beam divergence, respectively. According to the results, the maximum achievable distance at the communication conditions (6 for Q-factor and 1e−9 for BER) is about 5.1 km and 22 km for the system with and without ML, respectively within very clear weather condition. While, for hazy weather, these distances are reduced to 4.1 km for the system with ML and 8 km without ML. Furthermore, it’s represents an enhancement about 7.3% for the system with ML and 363.15% for the system without ML as compared with previous work.