Ultrafast Raman-induced Coupling of Femtosecond Soliton Molecules via Optical Terahertz Phonons

We identify the origin of closely-bound soliton states in femtosecond lasers via real-time spectroscopy: Impulsive Raman scattering stimulates coherent optical phonon vibrations, undulating the propagation of trailing solitons, enabling soliton-binding and rapid Raman-sampling.