Guiding Properties of the Ge-Based Square Lattice Photonic Crystal Fibers. International Journal of Current Engineering and Technology, [S. l.], v. 15, n. 3, p. 239–243, 2025. Disponível em: https://ijcet.evegenis.org/index.php/ijcet/article/view/1666. Acesso em: 12 mar. 2026.