[1] J. Capmany, B. Ortega, D. Pastor. J. Lightwave Technol., 24, 201(2006).
[2] Y. Jianping. J. Lightwave Technol., 27, 314(2009).
[3] J. Yao. IEEE Microwave Mag., 16, 46(2015).
[4] E. Xu, Z. Zhang, P. Li. IEEE Photon. J., 9, 1(2017).
[5] D. Zou, X. Zheng, S. Li, H. Zhang, B. Zhou. Chin. Opt. Lett., 12, 080601(2014).
[6] Y. Jin, E. H. W. Chan, X. Feng, X. Wang, B.-O. Guan. Chin. Opt. Lett., 13, 050601(2015).
[7] S. Ge, J. Liu, P. Chen, W. Hu, Y. Lu. Chin. Opt. Lett., 13, 120401(2015).
[8] E. Xu, J. Yao. IEEE Photon. Technol. Lett., 27, 2063(2015).
[9] R. Tao, X. Feng, Y. Cao, Z. Li, B. O. Guan. IEEE Photon. Technol. Lett., 24, 1097(2012).
[11] Y. Yu, S. Li, X. Zheng, H. Zhang, B. Zhou. Chin. Opt. Lett., 14, 060601(2016).
[12] J. Ge, M. P. Fok. IEEE Trans. Microwave Theory Tech., 65, 253(2017).
[15] R. Wu, H. Chen, S. Zhang, H. Fu, Z. Luo, L. Zhang, M. Zhao, H. Xu, Z. Cai. J. Lightwave Technol., PP, 1(2017).
[16] W. Qing, Y. Jianping. IEEE Photon. Technol. Lett., 20, 78(2008).
[17] H. Fu, Z. Xu, K. Zhu. IEEE Photon. J., 4, 1401(2012).
[18] B. Chen, E. H. W. Chan, X. Feng, X. Wang, B. O. Guan. Chin. Opt. Lett., 15, 080604(2017).
[19] H. Fu, K. Zhu, H. Ou, S. He. Opt. Laser Technol., 42, 81(2010).
[21] J. Ge, M. P. Fok. Conference on Lasers and Electro-Optics (CLEO), STh3F.2(2015).