GUT, Kazimierz. Broadband differential interference in a waveguide with a gradient refractive index distribution. Photonics Letters of Poland, [S. l.], v. 14, n. 3, p. 53–55, 2022. DOI: 10.4302/plp.v14i3.1157. Disponível em: https://photonics.pl/PLP/index.php/letters/article/view/14-18. Acesso em: 14 jun. 2024.