Q-switched erbium-doped fiber laser operating at 1502nm with molybdenum disulfide saturable absorber

Abstract

We demonstrate a Q-switched Erbium-doped fiber laser (EDFL) using a molybdenum disulfide (MoS[Formula: see text]-based saturable absorber (SA) as a Q-switcher. The SA is prepared from commercial available MoS2 pristine flakes with final solution concentration of [Formula: see text]0.02[Formula: see text]mg/ml. The Q-switcher is assembled by depositing a dried MoS2 onto a fiber ferule facet before it is matched with another clean ferrule via a connector. By increasing the pump power from 120[Formula: see text]mW to 160[Formula: see text]mW, stable generation of Q-switched EDFL incorporating MoS2 SA has been obtained at 1502[Formula: see text]nm wavelength. The pulse repetition rate also varies from 45.2[Formula: see text]kHz to 66.0[Formula: see text]kHz with pulse width which is increased from 2.73[Formula: see text][Formula: see text]s to 3.19[Formula: see text][Formula: see text]s. At pump power of 160[Formula: see text]mW, we successfully generated the maximum average output power of 0.51[Formula: see text]mW, corresponding to a pulse energy of 7.8[Formula: see text]nJ.