Cherutoi, H. C., Choge, D. K., & Waswa, D. W. (2026). Increasing the Capacity in NG-PON Using QPSK, 4-QAM, and 8-QAM Modulation Formats. Journal of Optics and Photonics Research, 3(2), 166-173. https://doi.org/10.47852/bonviewJOPR52025167