[1] erences S.H. Jang, B.H. Park and S.C Hong, Opt. Express 25, 8335 (2017).

[2] R.M. Li, W.Z. Li, M.L. Ding, Z.L. Wen, Y.L. Li, L.J. Zhou, S.S. Yu, T.H. Xing, B.W. Gao, Y.C. Luan, Y.T. Zhu, P. Guo, Y. Tian and X.D. Liang, Opt. Express 25, 14334 (2017).

[3] F.S. Vieira, F.C. Cruz, D.F. Plusquellic and S.A. Diddams, Opt. Express 24, 30100 (2016).

[4] F.Z. Zhang, X.Z. Ge, B.D. Gao and S.L. Pan, Opt. Express 23, 21868 (2015).

[5] S. Deng, M. Li, H.Y. Gao and Y.W. Dai, Opt. Fiber Technol. 31, 156 (2016).

[6] J.J. O’Reilly, P.M. Lane, R. Heidemann and R. Hofstetter, Electron. Lett. 28, 2309 (1992).

[7] J. Zhang, H.W. Chen, M.H. Chen, T.L. Wang and S.Z. Xie, IEEE Photon. Technol. Lett. 19, 1057 (2007).

[8] J. Zhang, M.G. Wang, C.G. Shao, T.J. Li and S.S. Jian, Acta Optic Sin. 3, 306004 (2014). (in Chinese)

[9] W.J. Jiang, C.T. Lin, H.S. Huang, P.T. Shih, J. Chen and S. Chi, 60-GHz Photonic Vector Signal Generation Employing Frequency Quadrupling Scheme for Radio- over-Fiber Link, Optical Fiber Communication Conference and National Fiber Optic Engineers Conference, OWF1 (2009).

[10] J. Zhang, H.W. Chen, M.H. Chen, T.L. Wang and S.Z. Xie, Opt. Lett. 32, 1020 (2007).

[11] M. Mohamed, X.P. Zhang, B.C. Hraimel and K. Wu, Opt. Express 16, 10141 (2008).

[12] Y.Y. Gao, A.J. Wen, Q.W. Yu, N.N. Li, G.B. Lin, S.Y. Xiang and L. Shang, IEEE Photon. Technol. Lett. 26, 1199 (2014).

[13] A. Kumar and V. Priye, Appl. Opt. 22, 5830 (2016).

[14] Z.H. Zhu, S.H. Zhao, W.Z. Zhao, W. Wang and B.Q. Lin, Appl. Opt. 32, 9432 (2015).

[15] Z.H. Zhu, S.H. Zhao, X.C. Chu and Y. Dong, Opt. Commun. 354, 40 (2015).

[16] Z.H. Zhu, S.H. Zhao, X. Li, K. Qu and T. Lin, Opt. Laser Technol. 87, 1 (2017).

[17] Z. Zhu, S. Zhao, X. Li, K. Qu and T. Lin, Opt. Laser Technol. 90, 144 (2017).

[18] P.M. Shi, S. Yu, Z.K. Li, S.G. Huang, J. Shen, Y.J. Qiao, J. Zhang and W.Y. Gu, Opt. Fiber Technol. 17, 236 (2011).

[19] Y. Qin, J.Q. Sun, M.D. Du and J.F. Liao, Opt. Commun. 315, 280 (2014).