[1] [1] Ahmed El-Mahdy and Menna Tullah Seraj-Eldin, Digital Communications and Networks 5, 189 (2019).

[2] [2] BALOGUN Muyiwa B., OVERINDE Olutayo Oyeyemi and TAKAWIRA Fambirai, IEEE Access 6, 56368 (2018).

[3] [3] LIAO Yong, HUA Yuanxiao and YAO Haimei, Journal of Chongqing University of Posts and Telecommunications (Natural Science Edition) 31, 348 (2019). (in Chi nese)

[4] [4] REN Hongliang, CAI Jiaxing, YE Xin, LU Jin, CAO Quanjun, GUO Shuqin, XUE Linlin, QIN Yali and HU Weisheng, Optics Communications 347, 1 (2015).

[5] [5] LI Lingxiang and LI Jibi, Journal of Chongqing University of Posts and Telecommunications (Natural Science Edition) 28, 743 (2016). (in Chinese)

[6] [6] FANG Xi and ZHANG Fan, Journal of Lightwave Technology 35, 1837 (2017).

[7] [7] SHIEH W., YANG Q. and MA Y., Optics Express 16, 6378 (2008).

[8] [8] NGUYEN Tu T., LE Son T., WUILPART Marc, YAKUSHEVA Tatiana and GRET Patrice M., Optics Express 25, 306270 (2017).

[9] [9] S. T. Le, N. Mac Suibhne, M. E. McCarthy, A. D. Ellis and S. K. Turitsyn, Journal of Lightwave Technology 34, 745 (2016).

[10] [10] ZAN Zuraidah, ALI Younus and YAACOB Mohd Hanif, Optics Letters 44, 307 (2019).

[11] [11] BAO Wei, BI Meihua, XIAO Shilin, FANG Jiafei, HUANG Tiancheng and ZHANG Yunhao, Optics Communications 435, 221 (2019).

[12] [12] CAO Shengjiao, KAM Pooi Yuen and YU Changyuan, IEEE Photonics Technology Letters 24, 2067 (2012).

[13] [13] LI Meng, WANG Qiong, LI Bo and WU Xingpei, International Journal of Signal Processing, Image Processing and Pattern Recognition 9, 229 (2016).

[14] [14] WANG Lingzi, TANG Xianfeng, ZHANG Xiaoguang, ZHANG Xia and XI Lixia, Chinese Journal of Lasers 41, 102 (2014).

[15] [15] HONG Xiaojian, YAN Qifeng, ZHANG Guowu, FEI Chao, HONG Xuezhi and HE Sailing, Optics Communications 426, 366 (2018).

[16] [16] MOUSA Pasandi MOHAMMAD E. and PLANT David V., IEEE Photonics Technology Letters 23, 1594 (2011).

[17] [17] HUSSIN Saleh, PUNTSRI Kidsanapong and NOE Reinhold, IEEE Photonics Technology Letters 25, 1099 (2013).

[18] [18] DING Yong, OUYANG Shan, XI Yuelei and XIAO Hailin, System Engineering and Electronics 36, 1632 (2014).