“Development of a Technique for Mitigating Four-Wave Mixing Effect in Dense Wavelength Division Multiplexing System Using DP-QPSK With Channel Spacing”. ELEKTRIKA- Journal of Electrical Engineering 23, no. 2 (August 29, 2024): 99–108. Accessed July 15, 2026. https://elektrika.utm.my/index.php/ELEKTRIKA_Journal/article/view/456.