Haase, B.B.HaaseKutas, M.M.KutasRiexinger, F.F.RiexingerBickert, P.P.BickertKeil, A.A.KeilMolter, D.D.MolterBortz, M.M.BortzFreymann, G.V.G.V.Freymann2022-05-062022-05-062022https://publica.fraunhofer.de/handle/publica/41631210.1364/OE.451527In this erratum, we correct two typing errors from our previously published manuscript [Opt. Express 27, 7458 (2019)]. In the original manuscript, the two errors were limited to the theoretical derivation and did not touch the numerical calculations such that the results and conclusions remain unchanged.en003621006519Erratum: Spontaneous parametric down-conversion of photons at 660 nm to the terahertz and sub-terahertz frequency rangeerratum