Wavelength-tunable noise-like soliton molecule in an L-band multiwavelength passively mode-locked figure-eight fiber laser
Аннотация
Abstract We demonstrate, to the best of our knowledge, the first experimental realization of continuous wavelength tuning of noise-like soliton molecule (NLSM) in an L-band multiwavelength passively mode-locked figure-eight fiber laser. The laser employs a nonlinear amplifying loop mirror integrated with a segment of polarization-maintaining fiber, which simultaneously functions as an artificial saturable absorber and a tunable comb filter for NLSM generation. By appropriately adjusting the pump power and polarization controllers, we achieve broadband spectral tuning of NLSM spanning from 1571.8 nm to 1602.0 nm, corresponding to a record 30.2 nm tuning range in the L-band mode-locked laser. This work establishes a new paradigm for dynamically wavelength-tunable soliton complexes in ultrafast fiber laser systems.