[1] [1] Y. Q. Lu, Z. L. Wan, Q. Wang, Y. X. Xi, and N. B. Ming, Appl. Phys. Lett. 77, 3719 (2000).

[2] [2] J. Wang, J. Shi, Z. Zhou, and X. Chen, Opt. Express 15, 1561 (2007).

[3] [3] X. Chen, J. Shi, Y. Chen, Y. Zhu, Y. Xia, and Y. Chen, Opt. Lett. 28, 2115 (2003).

[4] [4] F. Zumsteg, J. Bierlein, and T. Gier, J. Appl. Phys. 47, 4980 (1976).

[5] [5] K. Fedorova, M. Cataluna, P. Battle, C. Kaleva, I. Krestnikov, D. Livshits, and E. Rafailov, Appl. Phys. B 103, 41 (2011).

[6] [6] C. Tu, Z. Huang, K. Lou, H. Liu, Y. Wang, Y. Li, F. Lu, and H. T. Wang, Opt. Express 18, 25183 (2010).

[7] [7] J. H. Lundeman, O. B. Jensen, P. E. Andersen, S. Andersson-Engels, B. Sumpf, G. Erbert, and P. M. Petersen, Opt. Express 16, 2486 (2008).

[8] [8] J. Bierlein and C. Arweiler, Appl. Phys. Lett. 49, 917 (1986).

[9] [9] X. Wang, P. Basseras, R. Miller, and H. Vanherzeele, Appl. Phys. Lett. 59, 519 (1991).

[10] [10] G. Zheng, J. Xu, L. Chen, H. Wang, and W. She, Appl. Opt. 46, 6774 (2007).

[11] [11] W. She and W. Lee, Opt. Commun. 195, 303 (2001).

[12] [12] G. Zheng, H. Wang, and W. She, Opt. Express 14, 5535 (2006).

[13] [13] J. Yao, Nonlinear Optics Frequency Conversion and Laser Tuning Technology (Science Press, Beijing, 1995).