Zainab Mohammed Abdulkareem, Yaser Issam Hamodi, Sarmad Sami M.Ali, and Saif Mohamed Baraa Al-Sabit. “An Analysis of Performance in Free-Space Optical Communication Using Eight Wavelength Division Multiplexing”. Texas Journal of Engineering and Technology, vol. 24, Sept. 2023, pp. 13-19, https://zienjournals.com/index.php/tjet/article/view/4400.