Novel output states in the erbium-doped fiber laser near zero dispersion with semiconductor saturable absorber mirror

we report the observation of operation states near zero dispersion in the erbium-doped fiber laser with the semiconductor saturable absorber mirror (SESAM). The Q-switching, Q-switching mode-locking (QML), continuous wave mode-locking (CML), harmonic mode-locking (HML), double-pulse and multiple-pulse operation states can be manipulated by adjusting the polarization controller with semiconductor saturable absorber mirror. The output 3 dB spectral bandwidth and pulse width of operation states are also measured and analyzed. It is shown that continuous wave mode-locked state is stable and without spectral sidebands. Therefore, the proposed scheme will be useful and feasible in the optical telecommunication system.