Ortac, B.B.OrtacZaviyalov, A.A.ZaviyalovNielsen, C.K.C.K.NielsenEgorov, O.O.EgorovIliew, R.R.IliewLimpert, J.J.LimpertLederer, F.F.LedererTünnermann, A.A.Tünnermann2022-03-042022-03-042010https://publica.fraunhofer.de/handle/publica/22170210.1364/OL.35.001578We report the experimental generation of two-soliton molecules in an all-polarization-maintaining ytterbium-doped fiber laser operating in the normal dispersion regime. These molecules exhibit an independently evolving phase and are characterized by a regular spectral modulation pattern with a modulation depth of 80% measured as an averaged value. Moreover, the numerical modeling confirms that the limited modulation depth of the spectrum is caused by the evolution of the phase difference between the pulses.en620535journal article