[1] R. Blachman, P. F. Bordui, and M. M. Fejer, Appl. Phys. Lett. 64, 1318 (1994).
[2] J. P. Fève, B. Boulanger, G. Marnier, and H. Albrecht, Appl. Phys. Lett. 70, 277 (1997).
[3] Y. K. Yap, M. Inagaki, S. Nakajima, Y. Mori, and T. Sasaki, Opt. Lett. 21, 1348 (1996).
[4] T. Kojima, S. Konno, S. Fujikawa, K. Yasui, K. Yoshizawa, Y. Mori, T. Sasaki, M. Tanaka, and Y. Okada, Opt. Lett. 25, 58 (2000).
[5] X. Fan, H. Huang, J. Jiang, and J. He, Chin. Opt. Lett. 6, 192 (2008).
[6] Y. Su, J. He, Q. Jiang, and X. Fan, Chinese J. Lasers (in Chinese) 33, 1590 (2006).
[7] W. Koechner, Solid-State Laser Engineering (4th edn.) (Springer-Verlag, Berlin, 1996).
[8] Q. Lü, N. Kugler, H. Weber, S. Dong, and N. Müller, Opt. Quantum Electron. 28, 57 (1996).
[9] R. Hua, S. Wada, and H. Tashiro, Opt. Commun. 232, 333 (2004).
[10] C. Liu, J. Ge, Z. Xiang, and J. Chen, Chinese J. Lasers (in Chinese) 34, 1483 (2007).
[11] V. Magni, Appl. Opt. 25, 107 (1986).
[12] V. Magni, G. Valentini, and S. de Silverstri, Opt. Quantum Electron. 23, 1105 (1991).
[13] C. Liu, T. Riesbeck, X. Wang, J. Ge, Z. Xiang, J. Chen, and H. J. Eichler, Opt. Commun. 281, 5222 (2008).
[14] W. R. Bosenberg and D. R. Guyer, Appl. Phys. Lett. 61, 387 (1992).