Abstract
TiC<sub>2</sub> solution was prepared by employing an ultrasonic decomposition means and demonstrated its nonlinear characteristics at 2 μm range. A passively Qswitched (PQS) Tm:YAlO<sub>3</sub> （Tm:YAP ） laser was faultlessly carried out with the TiC<sub>2</sub> material as saturable absorber (SA), and a 2.22-W average output power with a 579-ns pulse duration at 255 kHz was achieved in PQS mode, matching with an 8.4% optical conversion efficiency. Also, an 8.7-μJ per pulse energy and a15.0-W peak power were gained from a PQS Tm:YAP laser. Furthermore, quality factors of vertical and horizontal beams from Tm:YAP laser were less than 1.2 under two kinds of mode.
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