Abd Al-Majeed , K.H. , Hasan, A.B. and Aldeen , S.H.R. (2025) “Evaluation of Optical Efficiency of Circular Cross-Section Torus Waveguide via Changing the Optical Parameters”, Ibn AL-Haitham Journal For Pure and Applied Sciences, 38(2), pp. 102–114. doi:10.30526/38.2.3932.