Abstract
Titanium disulfide (TiS2) material has been interest in an optics nonlinear due to its perfect optical, physical and chemical properties. However, there are few studies on TiS2 material as saturable absorber (SA) for ultrafast solid-state laser operating at 2-μm range. In this paper, we prepared TiS2 SA by using an ultrasonic thermolysis technique and demonstrated its saturable absorption characteristics by passively mode-locked (PML) technology. Under PML mode, Tm:YAG laser produced the maximum average output power of 102 mW at 2011.4 nm, corresponding to a shortest pulse duration of 224.0 ps at 208.5 MHz. To our knowledge, that is the narrowest pulse width from a PML Tm:YAG laser with a TiS2 SA.
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