<p>The development and advancement of laser technology have been greatly impacted by the use of femtosecond lasers, with mode-locking playing a pivotal role. Passive mode-locking has been of great importance in laser architectures using various saturable absorbers made of carbon nanotubes, as well as nonlinear integrated devices such as spiral wave-guides and integrated micro-ring resonators. In this work, we carried out investigation on the high influential impact of passively mode-locked saturable absorber nonlinearity on the dynamics of optical multipulse structures in a microresonator. This problem is characterized by a modified Lugiato-Lefever coupled equation with a strong passively mode-locked saturable absorber and a quintic nonlinearities, in a context where heat stored by the femto-laser in the ring cavity converges to a quasi-constant temperature limits. Numerical simulations reveal that in fully nonlinear regime, for the specific model considered, an increasing order of the saturable absorber parameter (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\Gamma \)</EquationSource> </InlineEquation>) favours propagation of multipulse soliton structure in a very short time-scale. Moreover, an electronic simulink model is proposed, where pulse train and multipulse structures are highly influenced by an increase of the saturation power. Despite the variation of the variation of the thermal detuning coefficients, the results clearly predict the stability of optical pulse, multipulse structures and bound-state soliton waves with strong nonlinearity (saturable absorber).</p>