Kadhim , A.A. and Salih , A.R. 2025. Calculating Properties of Mode for Step-Index Single-Mode Optical Fibers at 1064 nm Wavelength  . Ibn AL-Haitham Journal For Pure and Applied Sciences. 38, 4 (Oct. 2025), 136–143. DOI:https://doi.org/10.30526/38.4.4116.