Abstract
We investigate the influence of gain fiber on dissipative soliton pairs in passively mode-locked (PML) fiber laser based on black phosphorus (BP) as a saturable absorber. Numerical simulations show that we can generate the dissipative soliton pairs in PML fiber laser when the gain fiber parameters (gain saturation energy and gain bandwidth) are in an appropriate dynamic range, and the dissipative soliton pairs become unstable once the range is exceeded. Then we analyze the dynamic evolution of the dissipative soliton pairs and the influence of gain fiber on the pulse separation, peak power, and single-pulse energy of the dissipative solitons pairs.
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