研究目的
Investigating the impact of the recovery time of a saturable absorber on the mode-locking performance of fiber lasers with different net cavity group velocity dispersion.
研究成果
The recovery time of an SA has a limited impact on the output pulse characteristics in fiber lasers with anomalous net cavity GVD but significantly affects those with normal net cavity GVD. An SA operating in the fast saturable absorption regime is preferred for producing symmetric pulses in normal GVD cavities. The study provides insights into the optimal recovery time range for fiber laser mode-locking.
研究不足
The study is based on numerical simulations, which may not fully capture all physical phenomena in real-world fiber lasers. The impact of other SA parameters and environmental factors on mode-locking performance was not considered.
1：Experimental Design and Method Selection:
The study utilized numerical simulations to investigate the impact of SA recovery time on mode-locking performance in fiber lasers with normal and anomalous net cavity GVD. The extended nonlinear Schr?dinger equation was solved using a split-step Fourier method.
2：Sample Selection and Data Sources:
The simulations were based on theoretical models of fiber cavities incorporating SAs with varying recovery times and modulation depths.
3：List of Experimental Equipment and Materials:
The study did not involve physical experiments but was based on numerical modeling of fiber laser cavities.
4：Experimental Procedures and Operational Workflow:
The simulation started from an initial quantum noise, and the equation was iteratively solved to obtain a steady-state solution.
5：Data Analysis Methods:
The impact of recovery time on output pulse characteristics was analyzed for different modulation depths and net cavity GVD conditions.
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