[1] X. Zhou, H. Liu, R. Urata. Chin. Opt. Lett., 15, 120008(2017).
[2] Y. Li, Y. Zhang, L. Zhang, A. W. Poon. Photon. Res., 3, B10(2015).
[4] M. Kawamura, F. Nakajima, H. Oomori, H. Hara, A. Yasaki. Infocommunications, 80, 66.
[8] G. Li, D. Lambert, J. Zyskind, J. Spann, M. Askari, G. Pickrell, M. Sodagar, S. Krasulick. International Conference on Group IV Photonics (GFP), 164(2016).
[10] J.-S. Huang, X. He, H. Blauvelt, H. Chin, M. Lomeli, R. Zendejaz, C. Lei. IEEE Photonics Conference, 461(2015).
[11] T. Nakajima, T. Fukamachi, M. Akashi, A. Nakamura, Y. Sakuma, S. Hayakawa, R. Washino, M. Mukaikubo, K. Okamoto, K. Motoda, K. Naoe, K. Nakahara, S. Tanaka, K. Uomi. Optical Fiber Communications Conference and Exhibition, 1(2015).
[12] Z. Zhao, Y. Liu, Z. Zhang, X. Chen, J. Liu, N. Zhu. Chin. Opt. Lett., 14, 120603(2016).
[16] T. Ito, O. Slezak, M. Yoshita, H. Akiyama, Y. Kobayashi. Photon. Res., 4, 13(2016).