[1] [1] E. Snitzer. Optical maser action of Nd3+ in a barium grown glass[J]. Phys. Rev. Lett., 1961, 7(12): 444～446

[2] [2] E. Snitzer, P. H. Hakimi, F. Tumminelli et al.. Double-clad offset core Nd fiber laser[C]. Digest of Conference on Optical Fibre Sensors, Washington DC: Optical Society of America, 1988, Postdeadline paper PD5

[3] [3] L. Goldberg, B. Cole, E. Snitzer. V-groove side-pumped 1.5 μm fibre amplifier[J]. Electron. Lett., 1997, 33: 2127～2129

[4] [4] F. Hakimi, H. Hakimi. A new side coupling method for double clad fiber amplifiers[C]. CLEO, USA, 2001

[5] [5] J. Q. Xu, J. H. Lu, J. R. Lu, K. Ueda. Side-pumping of double-clad fiber laser with a non-fusional fiber coupler[C]. Proc. SPIE, 2001, 4594: 271～276

[6] [6] P. Ou, P. Yan, M. L. Gong, W. L. Wei. Multi-coupler side-pumped Yb-doped double-clad fiber laser[J]. Chin. Opt. Lett., 2004, 2: 285～287

[7] [7] Jeffrey P. Koplow, Sean W. Moore, Dahv A. V. Kliner. A new method for side pumping of double-clad fiber sources[J]. IEEE J. Quant. Electron., 2003, 39(4)

[8] [8] Herda R, Liem A, Schnabel B et al.. Efficient side-pumping of fibre lasers using binary gold diffraction gratings[J]. Electron. Lett., 2003, 39(3): 276～277

[9] [9] Wang Dazheng, Feng Xiaoming, Wang Yonggang et al.. A new technique for side pumping of double-clad fiber lasers[C]. AOE, China, 2007, 436～438

[10] [10] Weber T, Luthy W, Weber H P et al.. A longitude and side pumped single transverse mode double-clad fiber laser with a special silicone coating[J]. Opt. Commun., 1995, 115(12): 99～104

[11] [11] Zhang Chunwei, Xiang Shiqing, Wang Chang′an. Coupling efficiency analysis for the micro-prism sided-coupling method of double-cladding fiber[J]. Chinese J. Lasers, 2003, 30(7): 597～600