Ahmed, Musab, and مصعب. “Effect of Optical Feedback on the Modulation Properties of AlGaInP Semiconductor Laser”. Journal of Education and Science (JES) 21, no. 1 (March 1, 2008): 109–123. Accessed August 4, 2025. https://rjps.uomosul.edu.iq/index.php/edusj/article/view/17277.