[1] [1] C. A. Burrus, J. Stone. Single-crystal fiber optical devices: A Nd∶YAG fiber laser [J]. Appl. Phys. Lett., 1975, 26(6): 318～320

[2] [2] Jeffrey A. Morris, Clifford R. Pollock. Passive Q switching of a diode-pumped Nd∶YAG laser with a saturable absorber [J]. Opt. Lett., 1990, 15(8): 440～442

[3] [3] Y. Kalisky, A. Ben-Amer Baranga, Y. Shimony et al.. Cr4+ doped garnets: novel laser materials and non-linear saturable absorbers [J]. Opt. Mater., 1997, 8: 129～134

[5] [5] J. J. Zayhowski, C. Dill Ⅲ. Diode-pumped passively Q-switched picosecond microchip lasers [J]. Opt. Lett., 1994, 19(18): 1427～1429

[6] [6] B. Ferrand, B. Chambaz, M. Couchaud. Liquid phase epitaxy: A versatile technique for the development of miniature optical components in single crystal dielectric media [J]. Opt. Mater., 1999, 11: 101～114

[8] [8] Yonghang Shen, Shuying Chen, Weizhong Zhao et al.. Composite Cr4+∶YAG-Nd3+∶YAG crystal fiber: growth characteristics and passively Q-switched laser operation [C]. SPIE, 2002, 4918: 20～27

[9] [9] Yonghang Shen, Shuying Chen, Weizhong Zhao et al.. Growth characteristics and potential applications in optical sensors of composite Cr4+∶yttrium-aluminum-garnet (YAG)-Nd3+∶YAG crystal fiber[J]. Rev. Sci. Instrum., 2003, 74(3): 1187～1191