Authors: Lixin Wang; Xiaojuan Zhang; Hong Xu
Addresses: School of Electro-Optical, Beijing Institute of Technology, Beijing 100081, China; Science and Technology on Electro-Optical Information Security Control Laboratory, Sanhe 065201, China ' Science and Technology on Electro-Optical Information Security Control Laboratory, Sanhe 065201, China ' Science and Technology on Electro-Optical Information Security Control Laboratory, Sanhe 065201, China
Abstract: We report experimental results on a mid-infrared (mid-IR) ZnGeP2 optical parametric oscillator (OPO) pumped by a thulium laser. A high efficient Q-switched a-cut Tm:YAlO3 (Tm:YAP) laser was used to directly drive a ZnGeP2 OPO to generate 3-5 μm wavelength range. The diode pumped Tm:YAP laser operated on 1.99 μm at 10 kHz repetition rate, and its optical-to-optical conversion efficiency was 22.2%. The laser was run with room temperature components and achieved nearly 2 W average output power at 3-5 μm region with an efficiency of 5.5% starting from the pump diode. The influences of curvature and reflectivity of OPO output mirror on laser output are analysed and validated by experiments, and the results have benefit for the optimisation of such lasers.
Keywords: Tm:YAP lasers; mid-infrared; solid-state lasers; optical parametric oscillators; OPO; ZnGeP2 crystals; zinc germanium phosphide; thulium lasers; optimisation; curvature; reflectivity.
International Journal of Nanotechnology, 2015 Vol.12 No.10/11/12, pp.802 - 810
Published online: 18 Sep 2015 *Full-text access for editors Access for subscribers Purchase this article Comment on this article