研究目的
Investigating the effect of spectral filtering on pulse duration in an all-normal-dispersion laser operating in a dissipative soliton resonance (DSR) regime.
研究成果
Spectral filtering reduces the pulse duration in the DSR regime. The numerically simulated trend of the variation of flat-top pulse duration as a function of the gain for different spectral transmission bandwidths of the filter shows good qualitative agreement with the experimental results. An equivalence between the B-parameter and small signal gain is established.
研究不足
The study focuses on the DSR regime and the effect of spectral filtering within this specific context. The applicability of the findings to other regimes or conditions is not explored.
1：Experimental Design and Method Selection:
The study involves numerical simulation and comparison with analytical expressions to understand the effect of spectral filtering on pulse duration in the DSR regime.
2：Sample Selection and Data Sources:
The setup includes a 1 m long ytterbium doped fiber (YbDF) followed by a 2 m long standard single mode fiber (SMF), output coupler, saturable absorber (SA), bandpass filter (BPF), and another segment of 1 m long SMF to complete the ring cavity.
3：List of Experimental Equipment and Materials:
Ytterbium doped fiber (YbDF), standard single mode fiber (SMF), saturable absorber (SA), bandpass filter (BPF).
4：Experimental Procedures and Operational Workflow:
The propagation of optical pulse in each segment is modeled using a specific equation, and simulations are run for several roundtrips until a stable pulse is evolved from the initial noise fluctuations.
5：Data Analysis Methods:
The FWHM pulse duration of dissipative soliton pulse is calculated using an analytical expression, and the results are compared with numerical simulations.
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