DHYAA . F. HASSAN; HASSAN. A. YASSER. Frequency Mode Locking in Erbium Doped Fiber Laser. University of Thi-Qar Journal, [S. l.], v. 12, n. 1, p. 58–85, 2019. Disponível em: https://www.jutq.utq.edu.iq/index.php/main/article/view/79. Acesso em: 6 oct. 2025.