Abd Al-Majeed , K. H. .; Hasan, A. B. . .; Aldeen , S. H. R. . Evaluation of Optical Efficiency of Circular Cross-Section Torus Waveguide via Changing the Optical Parameters. IHJPAS 2025, 38 (2), 102-114. https://doi.org/10.30526/38.2.3932.