摘要The paper published in Chin. Phys. Lett. 26 (2009) 124211 reported a Q-switched 2-μm Tm:YAG laser that is intracavity pumped by a Nd:YAG laser with emission at 1.06 μm. However, analysis of the experimental setup concludes that only the Nd:YAG laser is Q-switched, and the Tm:YAG laser operates in the free-generation regime. Therefore, Q-switch operation for the 2-μm emission wavelength is not realized.
Abstract:The paper published in Chin. Phys. Lett. 26 (2009) 124211 reported a Q-switched 2-μm Tm:YAG laser that is intracavity pumped by a Nd:YAG laser with emission at 1.06 μm. However, analysis of the experimental setup concludes that only the Nd:YAG laser is Q-switched, and the Tm:YAG laser operates in the free-generation regime. Therefore, Q-switch operation for the 2-μm emission wavelength is not realized.
[1] Ma Q L, Zong N, Xie S Y, Yang F, Guo Y D, Xu J L, BoY, Peng Q J, Cui D F and Xu Z Y 2009 Chin. Phys. Lett. 26 124211 [2] Koechner W 2006 Solid-State Laser Engineering 6th edn(Berlin: Springer) chap 8