Over the past decades, researchers have demonstrated conventional solitons, stretched pulses, self-similar pulses, and dissipative solitons by managing the dispersion and nonlinearity of fiber lasers. However, new types of robust pulses were less discovered in mode-locked fiber lasers, since dissipative solitons were reported in ~2000s. On the other hand, chirp-free solitons are only achieved with anomalous-dispersion fiber lasers in the past, and the single-pulse energy is constrained within a relatively tight bound.
Click here for original story, A birefringence-managed normal-dispersion fiber laser delivering energy-tunable chirp-free solitons
Source: Phys.org