Akbar, J., M. . Hanif, M. A. Naeem, and K. Abid. “AlGaInAs/InP Based Five & Three Quantum Wells Mode Locked Laser Diodes: A Comparative Study”. Elektronika Ir Elektrotechnika, vol. 26, no. 5, Oct. 2020, pp. 22-27, doi:10.5755/j01.eie.26.5.26002.