Integratable pulsed 2-mu m laser with Tm,Mg:LiNbO3 crystal and single-walled carbon nanotube saturable absorber

摘要

We demonstrated an integratable passively Q-switched (PQS) Tm,Mg:LiNbO3 laser with a single-walled carbon nanotube saturable absorber (SWCNT-SA) for the first time. Its laser characteristics were investigated with different output couplers. At the pump power of 9.5 W, the maximum output power of 0.93 W around 1963 nm was obtained with the output transmission of 1%. The optical conversion efficiency is 9.79%, corresponding to a slope efficiency of 17.4%. For pulsed operation, a shortest pulse width attained was 640 ns, with the pulse repetition frequency of 44.6 kHz, and the single pulse energy was 12.6 mu J. (C) 2014 Elsevier Ltd. All rights reserved.