[1] [1] Lin Li. The advances and characteristics of high-power diode laser materials processing[J]. Laser Material Processing, 2000, 34(4-6): 231～2532 Y. Hori, I. Kuromatsu, Y. Sugimura. Photoselective vaporization of the prostate using high power (80 W) KTP laser: one year follow up of the first 101 patients in Japan[J]. Int J Urol., 2008, 15(12): 1067～1071

[2] [2] W. E. Glenn. Solid-state light sources for color projection[J]. Advanced Solid State Lasers, 1997, 10: 38～45

[3] [3] Liu Pengzu, Hou Jing, Zhang Bin et al.. 1550 nm passively mode-locked fiber laser with a semiconductor saturable absorber mirror[J]. Chinese J. Lasers, 2011, 38(7): 0702017

[4] [4] Liu Jiang, Wu Sida, Wang Ke et al.. Passively mode-locked and Q-switched Yb-doped fiber lasers with graphene-based saturable absorber[J]. Chinese J. Lasers, 2011, 38(8): 0802001

[5] [5] Liu Wei, Chen Tao, Dai Jianning et al.. All-fiberized Yb fiber laser with passively generated sub-nanosecond pulse output[J]. Acta Optica Sinica, 2011, 31(12): 1214003

[6] [6] P. DuPriez, A. Piper, A. Malinowski et al.. 321 W average power, 1 GHZ, 20 ps, 1060 nm pulsed fiber MOPA source[C]. California: Optical Fiber Communication Conference, 2005. PDP3

[7] [7] Fabio Di Teodoro, Christopher D. Brooks. Multistage Yb-doped fiber amplifier generating megawatt peak-power, subnanosecond pulses[J]. Opt. Lett., 2005, 30(24): 3299～3301

[8] [8] S. Pierrot, J. Saby, A. Bertrand et al.. All fiber high energy, high power picosecond laser[C]. San Jose: Conference on Lasers and Electro-Optics, 2010. CFD3

[9] [9] Shengping Chen, Hongwei Chen, Jing Hou et al.. 100 W all fiber picosecond MOPA laser[J]. Opt. Express, 2009, 17(26): 24008～24012

[10] [10] A. C. Tien, S. Backus, H. Kapteyn et al.. Short-pulse laser damage in transparent materials as a function of pulse duration[J]. Phy. Rev. Lett., 1999, 82(19): 3883～3886

[11] [11] Guohua Liu，Deming Liu. Optimization of pumping mode for double-clad fiber lasers[J]. Optics & Laser Technology, 2008, 40: 256～260

[12] [12] G. P. Agrawal. Nonlinear Fiber Optics[M]. 3rd edition, San Diego: Academic Press, 2001

[13] [13] E. Nakazawa, S. Shionoya. Cooperative luminescence in Yb:PO4[J]. Phys. Rev. Lett., 1970, 25(24): 1710～1712

[14] [14] P. D. Dragic, C. G. Carlson, A. Croteau. Characterization of defect luminescence in Yb doped silica fibers: part I NBOHC[J]. Opt. Express, 2008, 16(7): 4688～4697