In addition to some regular pulses such as conventional soliton (CS) and dissipative soliton (DS), passively mode-locked fiber lasers can also generate another type of distinctive pulse, i.e. the so-called noise-like pulse (NLP) . Generally speaking, in NLP fiber lasers, NLP can be switched from CS or DS by increasing the pump power or adjusting the polarization controller (PC) . However, as far as we know, multiple switchable generation between NLP and DS or CS have never been reported. We here show the multiple switchable phenomenon between NLP and DS from an Er-doped fiber laser (EDFL) based on nonlinear polarization rotation (NPR) for the first time. This kind of fiber laser not only facilitates the deep understanding of the properties and mechanisms of NLP but also paves a new way for the design of multi-functional light source.
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