We report the generation of stretched pulses in a passively mode-locked fiber laser based on a single-wall carbon nanotube saturable absorber. The spectral bandwidth and pulse duration of the single stretched pulse are similar to 25 nm and similar to 1.43 ps, respectively. By increasing the pump power and adjusting the polarization state, bound-state stretched pulses are delivered from the fiber laser. The pulse-pulse separation and wavelength spacing of the bound-state pulses are similar to 7.8 ps and similar to 1 nm, respectively. Numerical simulations reproduce the experimental results and agree well with the experimental observations.
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