the effect of linewidth enhancement factor on the period-one dynamics of cavity solitons

Cavity solitons (css) in an injected broad-area semiconductor laser with intracavity saturable absorber exhibit phase noise free and high-contrast intensity oscillations in period-one dynamical state. the continuous-wave periodic intensity oscillation of the css has a frequency well beyond the relaxation oscillation frequency and can be regarded as a photonic microwave source. here we numerically investigate the effect of linewidth enhancement factor on the dynamical characteristics of css in the period-one regime. we show that in a fixed injection amplitude, it has a key role in shifting the oscillation frequencies of the period-one css and that its effects strongly depend on the cavity detuning value.