[1] D. J. Bradley, B. Liddy, and W. E. Sleat, Opt. Commun. 2, 391 (1971).
[2] J. A. Giordmaine, P. M. Rentzepis, S. L. Shapiro, and K. W. Wecht, Appl. Phys. Lett. 11, 216 (1967).
[3] X. Ouyang, F. Zhang, P. Zhang, X. Xie, and J. Zhu, Chinese J. Lasers (in Chinese) 36, 742 (2009).
[4] R. N. Gyuzalian, S. B. Sogomonian, and Z. Gy. Horvath, Opt. Commun. 29, 239 (1979).
[5] F. Salin, P. Georges, G. Roger, and A. Brun, Appl. Opt. 26, 4528 (1987).
[6] R. Wyatt and E. E. Marinero, Appl. Phys. 25, 297(1981).
[7] I. N. Ross, D. Karadia, and J. M. Barr, Appl. Opt. 28, 4054 (1989).
[8] K. Osvay, A. P. Kov′acs, Z. Heiner, G. Kurdi, J. Klebniczki, and M. Csat′ari, IEEE J. Sel. Top. Quantum Electron. 10, 213 (2004).
[9] Q. Yang, A. Guo, X. Xie, F. Zhang, M. Sun, Q. Gao, M. Li, and Z. Lin, Chinese J. Lasers (in Chinese) 35, 1970(2008).
[10] J.-C. M. Diels, J. J. Fontaine, I. C. McMichael, and F. Simoni, Appl. Opt. 24, 1270 (1985).
[11] S. M. Saltiel and K. A. Stankov, Appl. Phys. B 35, 45(1984).