[1] A. J. Seeds and K. J. Williams, J. Lightwave Technol. 24, 4628 (2006).
[2] Q. Ye, R. Qu, and Z. Fang, Chin. Opt. Lett. 5, 8 (2007).
[3] L. A. Johansson and A. J. Seeds, J. Lightwave Technol. 21, 511 (2003).
[4] K.-H. Lee, W.-Y. Choi, Y. A. Leem, and K. H. Park, IEEE Photon. Technol. Lett. 19, 161 (2007).
[5] G. Qi, J. Yao, J. Seregelyi, S. Paquet, and C. Bélisle, IEEE Transactions on Microwave Theory and Techniques 53, 3090 (2005).
[6] K. K. Gupta, N. Onodera, M. Hyodo, M. Watanabe, and J. Ravikumar, J. Lightwave Technol. 22, 1935 (2004).
[7] Z. Deng and J. Yao, IEEE Transactions on Microwave Theory and Techniques 54, 763 (2006).
[8] F. Huang, X. Feng, and X. Liu, Chin. Opt. Lett. 6, 588 (2008).
[9] J. Dorring, L. Yan, D. A. Satorius, and Y. J. Chen, IEEE Photon. Technol. Lett. 14, 1497 (2002).
