[1] [1] Liu Qian-qian, Zheng Hong-jun, Li Xin, Bai Cheng-lin, Hu Wei-sheng and Yu Ru-yuan, Optoelectronics Letters 14, 336 (2018).

[2] [2] Gnauck A H, Tkach R W, Chraplyvy A R and Li T, Journal of Lightwave Technology 26, 1032 (2008).

[3] [3] Zhang Xue-bin, Tang Yi, Cui Lu, Zhu Qing-wei and Bai Ting-zhu, Acta Optica Sinica 36, 0206003 (2016). (in Chinese)

[4] [4] Gnauck A H, Charlet G, Tran P, Winzer P J, Doerr C R, Centanni J C, Burrows E C, Kawanishi T, Sakamoto T and Higuma K, Journal of Lightwave Technology 26, 79 (2008).

[5] [5] Munir A, Xin X J, Liu B, Latif A, Hussain A and Niazi S A, Optoelectronics Letters 8, 138 (2012).

[6] [6] Essiambre R, Kramer G, Winzer P J, Foschini G J and Goebel B, Journal of Lightwave Technology 28, 662 (2010).

[7] [7] Riesen N, Gross S, Love J D, Sasaki Y and Withford M J, Scientific Reports 7, 6971 (2017).

[8] [8] Xiao Y, Mumtaz S, Essiambre R J and Agrawal G P, Optical Fiber Communication Conference, 2014.

[9] [9] Chang Yu-xin, Hu Gui-jun, Bai Song, Li Jing-he and Wang Yan-ping, Chinese Journal of Lasers 41, 1205004 (2014).

[10] [10] Ryf R, Randel S, Gnauck A H, Bolle C, Sierra A, Mumtaz S, Esmaeelpour M, Burrows E C, Essiambre R J, Winzer P J, Peckham D W, McCurdy A H and Lingle J R, Journal of Lightwave Technology 30, 521 (2012).

[11] [11] Xie Yi-wei, Fu Song-nian, Zhang Hai-liang, Tang Ming, Shen Ping and Liu De-ming, Acta Optica Sinica 33, 0906010 (2013). (in Chinese)

[12] [12] Huang C B and Hu G J, Chinese Journal of Lasers 44, 0606002 (2017).

[13] [13] Ryf R, Fontaine N K, Mestre M A, Randel S, Palou X, Bolle C, Gnauck A H, Chandrasekhar S, Liu X, Guan B, Essiambre R J, Winzer P J, Leon-Saval S G, Bland-Hawthorn J, Delbue R, Pupalaikis P, Sureka A, Sun Y, Grüner-Nielsen L, Jensen R V and Lingle R, Frontiers in Optics, 2012.

[14] [14] Arik S O, Askarov D and Kahn J M, Journal of Lightwave Technology 31, 423 (2013).

[15] [15] Li Gui-fang, Bai Neng, Zhao Ning-bo and Xia Cen, Advances in Optics and Photonics 6, 413 (2014).