Ha, W.W.HaLee, S.S.LeeKim, J.J.KimKobelke, J.J.KobelkeSchuster, K.K.SchusterUnger, S.S.UngerSchwuchow, A.A.SchwuchowJun, K.K.K.K.JunOh, K.K.Oh2022-03-112022-03-112009https://publica.fraunhofer.de/handle/publica/365495We propose and demonstrate a hollow triangular-core fiber (HTCF) having low-fold symmetry in contrast to conventional cylindrical optical fibers. Near-field intensity variations, Fresnel diffraction patterns, and polarization modes of the HTCF were investigated. ©2009 Optical Society of America.en620conference paper