JAROCKA, Agata; PŁOCHOCKI, Karol; FETLIŃSKI, Bartosz; JURCZENIA, Karol; PIETRZAK, Tomasz K.; WASIUCIONEK, Marek. Up-conversion Photoluminescence in a Fluorophosphate Glass Matrix Doped with Yb/Er – Effects of Doping Levels. Photonics Letters of Poland, [S. l.], v. 18, n. 1, p. 1–3, 2026. DOI: 10.4302/plp.v18i1.1368. Disponível em: http://photonics.pl/PLP/index.php/letters/article/view/18-1. Acesso em: 17 apr. 2026.