Ankiewicz, Adrian2023-05-050924-090Xhttp://hdl.handle.net/1885/289883We define a quantized nonlinear pulse ‘volume’. This then allows us to determine the characteristic of a possible rogue wave by looking at its volume, found from a surface integral. Where higher powers are needed in the integrand, due to slow decay of a pulse, we describe the excitation as a ‘semi-rogue’ wave.application/pdfen-AU© The Author(s), under exclusive licence to Springer Nature B.V. 2021Rogue wavesQuantizationNonlinear pulses202110.1007/s11071-021-06449-52022-02-13