研究目的
Investigating the splitting and motions of dissipative soliton resonance (DSR) pulses in an all-normal-dispersion Yb-doped ?ber laser mode-locked by a non-linear optical loop mirror.
研究成果
Numerical simulations have demonstrated that with speci?c system parameters selection, one unstable DSR pulse with several dark solitons inside can split into two DSR pulse with the same properties due to the collisions and decay of dark solitons. The pulses can eventually reach a steady-state operation with a ?xed separation. Similar to conventional solitons, the phase shift governs the relative motions of the separated DSR pulses.
研究不足
The DSR pulse splitting depends strongly on the system parameters, and the physical mechanism requires further investigation.
1：Experimental Design and Method Selection:
The simulations are based on the pulse tracing technique, starting from a weak single Gaussian pulse. The pulse propagation in the ?ber sections is modeled by a scalar non-linear Ginzburg-Landau equation.
2：Sample Selection and Data Sources:
The cavity consists of a 1-m-long Yb-doped ?ber (YDF), 5-m-long single mode ?ber (SMF), a saturable absorber (SA) with a sinusoidal transmission function, and a 90:10 optical coupler (OC) with 10% output.
3：List of Experimental Equipment and Materials:
Yb-doped ?ber (YDF), single mode ?ber (SMF), saturable absorber (SA), optical coupler (OC).
4：Experimental Procedures and Operational Workflow:
The simulations start from a weak single Gaussian pulse. The pulse propagation in the ?ber sections is modeled by a scalar non-linear Ginzburg-Landau equation.
5：Data Analysis Methods:
The pulse properties such as temporal pro?les and instantaneous frequency pro?les are analyzed at different roundtrips.
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