[1] L. Zong, P. Ji, T. Wang, O. Matsuda, and M. Cvijetic, in Proceedings of National Fiber Optic Engineers Conference 2006 NThC3 (2006).
[2] X. Li and D. Sun, Opt. Precis. Eng. (in Chinese) 15, 467 (2007).
[3] J. Tsai, C.-Y. Yin, C.-W. Sun, and M. C. Wu, Appl. Opt. 46, 3227 (2007).
[4] S. de Hennin, P. Wall, S. H. Moffat, B. P. Keyworth, and P. D. Colbourne, in Proceedings of OFC 2007 OWV1 (2007).
[5] S. Sumriddetchkajorn and K. Chaitavon, Proc. SPIE 5625, 793 (2005).
[6] H. Zhou, W. Liu, Y. Lin, S. K. Mondal, and F. G. Shi, IEEE Trans. Adv. Packag. 25, 481 (2002).
[7] P. Hou, Z. Song, X. Li, J. Zhang, and L. Liu, Acta Opt. Sin. (in Chinese) 28, 365 (2008).
[8] A. K. Garg and R. S. Kaler, Chin. Opt. Lett. 6, 244 (2008).
[9] J. Tsai, S. T.-Y. Huang, D. Hah, and M. C. Wu, J. Lightwave Technol. 24, 897 (2006).
[10] C.-H. Chi and M. C. Wu, Proc. SPIE 6376, 63760G (2006).
[11] X. Li, J. Liang, D. Sun, Y. Zhong, W. Li, and Z. Liang, Proc. SPIE 6836, 683608 (2007).