Spectral-temporal transient dynamics of dissipative soliton molecules in mode-locking fiber lasers

Abstract

Dissipative soliton molecules that are analogous in many ways to matter molecules manifest complex evolution dynamics. Here, spectral-temporal transient internal motion dynamics of dissipative soliton molecules generated in a passively mode-locking erbium-doped fiber laser are experimentally investigated. Various categories of internal motion dynamics including attraction, creeping, dual-period breathing, and collision behaviors are revealed by employing an asynchronous time lens-based temporal magnifier together with the time stretched technique. Soliton temporal separation in those motion dynamics exhibit gradual decreasing and slightly wiggling motion. The temporal magnification factor of time lens system is substantially improved into 361. Our work makes the temporal magnifier more attractive for the applications of ultrafast measurements and nonlinear fiber optics, and benefits for fiber laser design.