Self-Starting Harmonic Mode-Locking Yb-Doped Fiber Mamyshev Oscillator Based on Multimode Interference Filtering

A self-starting harmonic mode-locked Mamyshev oscillator (HML-MO) based on the integration of overlapping f ilter passbands and a multimode interferometer is proposed. Different orders of harmonic mode-locked dissipative soliton pulses (HMLDSPs) were observed. The experimental results in dicate that with a fixed spectral filtering interval and polarization controller (PC) state, the order of HMLDSPs increases with pump power, reaching up to the 26th order. Additionally, when the PC state and pump power were fixed, the order of HMLDSPs and the output power of the HML-MO decreased as the filter spacing increased. By carefully adjusting the pump power and PCstates, dissipative soliton pulses with a fundamental repetition rate were also achieved. These research results are expected to expand the potential applications of the Mamyshev oscillator (MO) and deepen the understanding of multimodal dynamic phenomena.