We experimentally realize a singly resonant optical parameter oscillator (OPO) which operates at the degenerate point of KTiOPO4 (KTP) crystal. A thin film plate polarizer (TFP) is used as the output coupler to obtain linearly polarized 2.12 \mum laser. A maximum output power of 2.2 W at 2.12 \mum is obtained from a near-degenerate, type-II KTP OPO by utilizing a Q-switched diode-pumped Nd:YAG laser operating at 5 kHz.
© 2009 Chinese Optics Letters
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3410) Lasers and laser optics : Laser resonators
(190.4410) Nonlinear optics : Nonlinear optics, parametric processes
Qianjin Cui, Nan Zong, Yiting Xu, Yuanfu Lu, Yong Bo, Qinjun Peng, Dafu Cui, and Zuyan Xu, "2-\mum singly resonant optical parameter oscillator," Chin. Opt. Lett. 7, 519-520 (2009)