Abstract
Based on an as-prepared high-quality tin diselenide-polyvinyl alcohol (SnSe2-PVA) saturable absorber (SA), the stable rectangular pulses operating at the dissipative soliton resonance (DSR) region were observed in a passively mode-locked ytterbium-doped fiber (YDF) laser at the center wavelength of 1062.3 nm. The laser characteristics versus the pump power were investigated experimentally. As the pump power increased, the wave-breaking-free DSR pulse width varied from 20.5 ns to 44.7 ns. At the pump power of 365 mW, the maximum pulse energy of the DSR pulse is 0.928 nJ, corresponding to a signal to noise ratio (SNR) up to 74 dB. The results demonstrate the excellent saturable absorption performance of SnSe2 in generating the DSR pulses in fiber lasers.
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