[1] [1] Huang W, Ming H, Xie J, et al. High efficiency broad bandwidth erbium-doped superfluorescent fiber source[J]. Chinese Optics Letters, 2003, 1(6): 311-313.

[2] [2] Wang L, Lee C, You G. Polarized erbium-doped superfluorescent fiber source utilizing double-pass backward configuration[J]. Applied Optics, 2005, 44(1): 77-82.

[3] [3] Park H, Yun S, Jin Y. Er-doped superfluorescent fiber source with thermally stable mean wavelength[J]. Journal of the Optical Society of Korea, 2009, 13(2): 240-244.

[4] [4] Lin H, ChangC. High power C+L-band Erbium ASE source using optical circulator with double-pass and bi-directional pumping configuration[J]. Optics Express, 2004, 12(25): 6135-6140.

[5] [5] Wu X, Ruan S, Liu C. High-stable and broadband erbium-doped superfluorescent photonic crystal fiber source[J]. Optical Engineering, 2012, 51(9): 095005.

[6] [6] Wu X, Ruan S, Liu C. High-stability erbium-doped photonic crystal fiber source[J]. Applied Optics, 2012, 51(13): 2277-2281.

[7] [7] Wang P, Sahu J. 110 W double-ended ytterbium-doped fiber superfluorescent source with M2=1.6[J]. Optics Letters, 2006, 31(21): 3116-3118.

[8] [8] Wang P, Sahu J. High-power broadband ytterbium-doped helical-core fiber superfluorescent source[J]. IEEE Photonic Technology Letters, 2007, 19(5): 300-302.

[9] [9] Schmidt O, Rekas M, Wirth C, et al. High power narrow-band fiber-based ASE source[J]. Optics Express, 2011, 19(5): 4421-4427.

[10] [10] Xiao Q, Yan P, Wang Y, et al. High-power all-fiber superfluorescent source with fused angle-polishedside-pumping configuration[J]. Applied Optics, 2011, 50(8): 1164-1169.

[11] [11] Cao Y, Liu J, Wang K, et al. All-fiber hundred-Watt-level broadband ytterbium-doped double cladding fiber superfluorescent source[J]. Chinese Journal of Lasers, 2012, 39(8): 0802008.

[12] [12] An Y, Cao J, Huang Z. High-power all-fiberized superfluorescent source with distributed side-coupled cladding-pumped fiber[J]. Applied Optics, 2014, 53(36):8564-8570.

[13] [13] Xu J, Liu W, Leng J. Power scaling of narrowband high-power all-fiber superfluorescent fiber source to 1.87 kW[J]. Optics Letters, 2015, 40(13): 2973-2976.

[14] [14] Codemard C A, Sahu S J, Nilsson J. Tandem cladding-pumping for control of excess gain in ytterbium-doped fiber amplifiers[J]. IEEE Journalof Quantum Electronics,2010, 46(12): 1860-1868.