[1] [1] Li Menglong, Meng Peibei, Yan Fanjiang, et al. Progress on passively Q-switched solid-state lasers[J]. Laser & Optoelectronics Progress, 2015, 52(9): 090001.

[2] [2] Isyanova Y, Welford D. Temporal criterion for single-frequency operation of passively Q-switched lasers[J]. Opt Lett, 1999,24(15): 1035-1037.

[3] [3] Thevar T M, Watson J. Longitudinal mode selection in a dye Q-switched ruby laser: A comparison between theoretical and experimental results[J]. Proc SPIE, 1996, 2889: 60-69.

[4] [4] Sooy W R. The natural selection of modes in a passive Q-switched laser[J]. Appl Phys Lett, 1965, 7(2): 36-37.

[5] [5] Xu Ou. Research and progress of all-fiber single-longitudinal mode lasers based on fiber grating technologies[J]. Laser & Optoelectronics Progress, 2015, 52(3): 030010.

[6] [6] Yin Qiwei, Lu Huadong. Influence of wavelength of pump source on output power of 1064 nm laser[J]. Laser & Optoelectronics Progress, 2015, 52(9): 091402.

[7] [7] Ishaaya A A, Davidson N, Friesem A. Very high-order pure Laguerre-Gaussian mode selection in a passive Q-switched NdYAG laser[J]. Opt Express, 2005, 13(13): 4952-4962.

[8] [8] Ishaaya A A, Davidson N, Friesem A A, et al. Stable selection of very high transverse modes in passive Q-switched lasers[J]. 2005 Conference on Lasers and Electro-Optics Europe, 2005: 16.

[9] [9] Davtian A S, Pokrovskyi V P, Sobolev S S, et al. Passive Q-switched NdYAG single-frequency laser with tunable pulse shape and pulse duration[J]. 2014 International Conference Laser Optics, 2014: 1.

[10] [10] Song B A, Zhao W J, Ren D M, et al. Passively Q-switched laser with single longitudinal mode based on the frequency selection of grating and F-P etalon in twisted-mode folded cavity[J]. Chin Opt Lett, 2009, 7(9): 805-808.

[11] [11] Basiev T T, Fedin A V, Gavrilov A V, et al. Small diameter deep hole drilling by single-mode NdYAG laser with scanning passive Q-switch[J]. Proceedings of the International Conference on Lasers-Society for Optical and Quantum Electronics. Society for Optical and Quantum Electronics, 1998: 1060-1063.

[12] [12] Arumov G P, Bukharov A Y, Nekhaenko V A, et al. Single-frequency YAGNd3+ laser with passive Q switching[J]. Quantum Electronics, 1987, 17(7): 864-865.

[13] [13] Afzal R S, Yu A W, Dallas J L, et al. The geoscience laser altimeter system (GLAS) laser transmitter[J]. IEEE J Sel Top Quant, 2007, 13(3): 511-536.

[14] [14] Afzal R S, Anthony W Y, Zayhowski J J, et al. Single-mode high-peak-power passively Q-switched diode-pumped NdYAG laser[J]. Opt Lett, 1997, 22(17): 1314-1316.

[15] [15] Koechner W. Solid-state laser engineering[M]. Berlin: Springer, 2006.

[16] [16] Renk K F. Laser principle[M]. Berlin: Springer, 2012.