[1] [1] Honea E C, Beach R J, Sutton S B, et al. 115-W Tm: YAG diode-pumped solid-state laser[J]. IEEE Journal of Quantum Electronics, 1997, 33(9): 1592-1600.

[2] [2] Vincent F, Martin B, Bah S T, et al. 30W Fluoride glass all-fiber laser at 2.94 μm[J]. Optics Letters, 2015, 40(12):2882-2885.

[3] [3] Jackson S D. Towards high-power mid-infrared emission from a fibre laser[J]. Nature Photonics, 2012, 6(7): 423-431.

[4] [4] Bu Xiangbao, Shi Hongxing, Cheng Zhaochen, et al. Tunable narrow-linewidth Cr:ZnSe laser pumped by Tm-doped fiber laser[J]. Chinese Journal of Laser, 2017, 44(2):0201014. (in Chinese)

[5] [5] Ji E C, Liu Q, Hu Z Y, et al. High-power, high-energy Ho:YAG oscillator pumped by a Tm-doped fiber laser[J]. Chinese Optics Letters, 2015, 13(12): 121402.

[6] [6] Sun Feng, Zheng Jiankui. High power quasi CW Ho: YLF laser pumped by fiber laser[J]. Optics and Optoelectronic Technology, 2016, 14 (5): 34-37. (in Chinese)

[7] [7] Zhou R L, Ju Y L, Wang W, et al. Acousto-optic Q-switched operation Ho: YAP laser pumped by a Tm-doped fiber laser[J]. Chinese Physics Letters, 2011, 28(7): 074210.

[8] [8] Yu T, Bai G, Chen W B, et al. 20.2 W CW 2.118 μm Ho:YAlO3 laser pumped by 1.915 nm Tm-doped fiber laser[C]//Pro of SPIE, 2015, 9466: 94660U.

[9] [9] Hanna D C, Jauncey I M, Percival R M, et al. Continuous-wave oscillation of a monomode thulium-doped fiber laser[J]. Electronics Letters, 1988, 24(19): 1222-1223.

[10] [10] Meleshkevich M, Platonov N, Gapontsev D, et al. 415 W single-mode CW thulium fiber laser in all-fiber format[C]//Lasers and Electro-Optics, 2007 and the International Quantum Electronics Conference. CLEOE-IQEC 2007. European Conference on IEEE, 2007: 1.

[11] [11] Frith G, Carter A, Samson B, et al. Highly efficient 70 W all-fibre Tm-doped laser system operating at 1908nm[C]// Opto-Electronics and Communications Conference, 2008 and the 2008 Australian Conference on Optical Fibre Technology. OECC/ACOFT 2008, Joint Conference of the IEEE, 2008: 1-2.

[12] [12] Johnson B R, Creeden D, Limongelli J, et al. Comparison of high power large mode area and single mode 1 908 nm Tm-doped fiber lasers[C]//SPIE, 2016, 9728: 972810.

[13] [13] Hu Z Y, Yan P, Gong M L, et al. 227-W output all-fiberized Tm-doped fiber laser at 1 908 nm[J]. Chinese Physics B, 2014, 23(10): 147-150.

[14] [14] Yang C, Ju Y L, Dai T Y, et al. High-power Tm3+-doped all-fiber laser operating at 1 908 nm by a master oscillator power amplifier configuration with narrow spectral linewidth[J]. Chinese Optics Letters, 2016, 14(6): 061403.

[15] [15] Xing Y B, Liao L, Li J Y, et al. Fabrication of Tm-doped fibers for high power and 121 W output all-fiber tm-doped fiber laser[J]. Chinese Physics Letters, 2015, 32(3): 034204.

[16] [16] Yu T, Ye X S, Yang Z G, et al. All fiber thulium-doped fiber laser pumped Q-switched Ho: YAP laser[C]//Proc of SPIE, 2017: 101731M.

[17] [17] Frith G, Carter A, Samson B, et al. Design considerations for short-wavelength operation of 790-nm-pumped Tm-doped fibers[J]. Applied Optics, 2009, 48(27): 5072.

[18] [18] Jackson S D, King T A. Theoretical modeling of Tm-doped silica fiber lasers[J]. Journal of Lightwave Technology, 1999, 17(5): 948-956.

[19] [19] Xu J Q, Prabhu M, Lu J, et al. Efficient double-clad thulium-doped fiber laser with a ring cavity[J]. Applied Optics, 2001, 40(12): 1983-1988.

[20] [20] Kablukov S I, Zlobina E A, Podivilov E V, et al. Output spectrum of Yb-doped fiber lasers[J]. Optics Letters, 2012, 37(13): 2508-2510.

[21] [21] Zhang Liming, Zhou Shouhuan, Zhao Hong, et al. Output characteristics of kW stage main oscillator power amplifying fiber laser[J]. High Power Laser and Particle Beams, 2013, 25(8): 1893-1896. (in Chinese)

[22] [22] Liu Jiang, Liu Chen, Shi Hongxing, et al. 342 W all-fiber CW Tm-doped fiber laser with narrow linewidth[J]. Acta Physica Sinica, 2016, 65(19): 194209. (in Chinese)