Effect of spectral filtering on pulse duration in dissipative soliton resonance (DSR) regime of modelocked fiber laser

摘要： The effect of spectral filtering on pulse duration in an all-normal-dispersion laser operating in a dissipative soliton resonance (DSR) regime is studied numerically and compared with the results obtained by solving the analytical expressions. It is observed that the 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.