[1] Hderson S W, Suni P J M, Hale C P, et al. Coherent laser radar at 2μm using solid-state lasers [C]//Geoscience and Remote Sensing IEEE, 1993, 31(1): 4-15.

[2] Humbach O, Fabian H, Grzesik U, et al. Analysis of OH absorption bands in synthetic silica [J]. Journal of Non-crystalline Solids, 1996, 203: 19-26.

[3] Scholle K, Lamrini S, Koopmann , et al. 2μm laser sources and their possible applications frontiers in guided wave optics and optoelectronics[C]//ISBN, 2010, 978-953-7619-82-4.

[4] Stoneman R C, Esterowitz L. Efficient 1.94μm Tm:YALO laser[J]. IEEE J Sel Top Quantum Electron, 1995, 1(1):78-81.

[5] Temel B, Ozgür T, Hamit K, et al. Modulated and continuous-wave operations of low-power thulium (Tm:YAP) laser in tissue welding[J]. Journal of Biomedical Optics, 2010, 15(3): 038001.

[6] Bilici T, Mutlu S, Kalaycioglu H, et al. Development of a thulium (Tm:YAP) laser system for brain tissue ablation[J]. Springer, 2011(26): 699-706.

[7] Temel B, Ozgür T, Hamit K, et al. Skin tissue ablation by Thulium (Tm:YAP) laser at 1980 nm[C]//Proc of CLEO, 2009: CL_P11.

[8] Stoneman R C, Esterowitz L. Efficient 1.94μm Tm:YALO laser[J]. IEEE J Sel Top Quantum Electron, 1995, 1(1): 78-81.

[9] Li H S, Zhao M, Xu W H. Experimental study on the 1.94μm laser performance of c-cut Tm:YAP crystal with various doping concentration[J]. Laser Physics, 2012, 22(9): 1378-1380.