Research on wideband dissipative soliton generation and the dynamics process

Abstract

Abstract Wideband dissipative soliton is generated in a passively mode-locked cavity by optimizing the distribution of chromatic dispersion and gain filtering in cavity. The maximal 3 dB bandwidth of 61.1 nm is obtained. The corresponding pulse width is compressed to 222 fs with chirp, which could be further compressed to 42 fs according to the Fourier transform limitation. The signal-to-noise ratio is 80.3 dB. The single pulse energy is 0.18 nJ. The dynamics process is investigated by dispersive Fourier transformation during the building-up. The simulation investigation on dissipative soliton formation is provided according to the modified nonlinear Schrödinger equation, which are relatively consistent with the experiment. The results demonstrate that a weak normal net dispersion close to zero and efficient gain bandwidth are critical to the formation of wideband dissipative soliton.