[2] Henderson S W, Suni P J M, Hale C P et al.. Coherent laser radar at 2 μm using solid-state lasers. IEEE Transactions on Geoscience and Remote Sensing, 1993, 31(1):4~14
[3] Johnson L F. Optical maser characteristics of rare-earth ions in crystals. J. Appl. Phys., 1963, 34(4): 897~909
[4] Lotem H, Kalisky Y, Kagan J et al.. A 2 μm holmium laser. IEEE J. Quant. Electron., 1988, 24(6): 1193~1200
[5] Budni P A, Pomeranz L A, Lemons M L et al.. Efficient mid-infrared laser using 1.9-μm-pumped Ho∶YAG and ZnGeP2 optical parametric oscillators. J. Opt. Soc. Am. (B), 2000, 17(5):723~728
[6] Mcguckin B T, Menzies R T. Efficient CW diode-pumped Tm,Ho∶YLF laser with tunability near 2.067 μm. IEEE J. Quant. Electron., 1992, 28(4):1025~1028
[7] Budni P A, Pomeranz L A, Lemons M L et al.. 10 W mid-IR holmium pumped ZnGeP2 OPO.OSA TOPS. Advanced Solid State Lasers, 1998, 19:226~229
[8] Falconieri M, Lanzi A, Salvetti G et al.. Fluorescence dynamics in Tm,Ho∶YLF following 800 nm pulsed laser excitation. Appl. Phys. (B), 1998, 66(2):153~162
[9] Mark E S. Holmium YLF amplifier performance and the prospects for multi-joule energies using diode-laser pumping. IEEE J. Quant. Electron., 1993, 29(2):440~451