Generation of high-order solitons with order continuously adjustable in a fiber laser based on GIMF-SIMF-GIMF saturable absorber

We report on the generation of high-order solitons with order continuously adjustable in an erbium-doped fiber laser mode-locked by a graded index multimode fiber-step index multimode fiber-graded index multimode fiber (GIMF-SIMF-GIMF) saturable absorber (SA). The SA has advantages of high damage threshold, easy fabrication and low cost. The fundamental soliton to eleventh-order soliton were obtained by adjusting the pump power and PC. It was found that both increasing pump power and adjusting PC can affect the solitons splitting during experiment. The generation of high-order solitons is due to the peak power clamping effect of laser cavity and the pulse shaping effect of GIMF-SIMF-GIMF SA. Last but not least, this is the first time to adjust the order of solitons continuously from the first to eleventh in a fiber laser mode-locked by GIMF-SIMF-GIMF SA.

Automated summary

The research demonstrates the generation of high-order solitons in an erbium-doped fiber laser mode-locked by a graded index multimode fiber-step index multimode fiber-graded index multimode fiber (GIMF-SIMF-GIMF) saturable absorber, with the ability to continuously adjust the order of solitons from the first to eleventh. By adjusting the pump power and polarization controller, solitons ranging from fundamental to eleventh-order were obtained, with variations observed in soliton splitting due to changes in pump power and polarization controller settings. The generation of high-order solitons is attributed to the peak power clamping effect of the laser cavity and the pulse shaping effect of the GIMF-SIMF-GIMF saturable absorber.