ABDUL-RAZAK, F. Transmission Spectrum Shifting By Varying Ambient Refractive Index in LPFG. Al-Rafidain Engineering Journal (AREJ), [S. l.], v. 20, n. 2, p. 131–139, 2012. DOI: 10.33899/rengj.2012.47290. Disponível em: https://jamh.uomosul.edu.iq/index.php/arej/article/view/30708. Acesso em: 8 sep. 2025.