Analysis of the effect of BER and Q-factor on free space optical communication system using diverse wavelength techniqueA. A. Anis, C. B. M. Rashidi, A. K. Rahman, S. A. Aljunid and N. AliEPJ Web Conf., 162 (2017) 01024DOI: https://doi.org/10.1051/epjconf/201716201024