Watching the coherence of multiple vibrational states in organic dye molecules by using supercontinuum probing photon echo spectroscopy

► We provide a modified technique named supercontinuum probing photon echo (SCPPE). ► The SCPPE technique is used to study the vibrational coherence in organic dye film. ► The SCPPE technique can realize broadband detection. ► The coherences of multiple vibrational states are shown in the results.