Lossy mode resonances in photonic crystal fibers Mauricio Salazar Sicacha, Vladimir P. Minkovich, Alexander B. Sotsky, Artur V. Shilov, Luidmila I. Sotskaya and Evgeny A. Chudakov J. Eur. Opt. Soc.-Rapid Publ., 17 1 (2021) 24 Published online: 22 November 2021 DOI: 10.1186/s41476-021-00169-4