A. Hubeatir K, A. Mahdi M, Jabur Al-Azawi R. Theoretical Analysis of Coupling Constant, Longitudinal Modes, and Threshold Gain for Coupled-Cavity Semiconductor Lasers. J. eng. sustain. dev. 2009;13(3):1-12. Accessed June 5, 2026. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1522