Numerical simulations of the full governing system ((a) and (b)) and the SGLE ((c) and (d)) at different gain values in the normal dispersion regime. (a) and (c) Stable single-pulse evolution starting from white noise at . (b) and (d) The initial white noise evolves into two identical pulses per cavity round trip at . The rest of the parameters in the simulations are , , , , , , , , and (from [29], 2011, IEEE).