[1] [1] MU Xin, FU Xiu-hua, ZHAO Yan and JIA Yan, Acta Photonica Sinica 40, 259 (2011). (in Chinese)

[2] [2] LI Wei, CHANG Sheng-jiang, WANG Xiang-hui, LIN Lie and BAI Jin-jun, Optoelectronics Letters 10, 180 (2014).

[3] [3] L. Domash, M. Wu and N. Nemchuk, Journal of Lightwave Technalogy 22, 126 (2004).

[4] [4] YU Kan, JI Zi-juan, HUANG De-xiu, BAO Jia-qi and YIN Juan-juan, Acta Photonica Sinica 39, 1971 (2010). (in Chinese)

[5] [5] YU Kan, LIU Wen and HUANG De-xiu, Acta Photonica Sinica 37, 1175 (2008). (in Chinese)

[6] [6] NIE Ming-ju and LIU De-ming, Acta Photonica Sinica 38, 2015 (2009). (in Chinese)

[7] [7] K. Yu, Y. Y. Liu, J. Q. Bao and D. X. Huang, Optics and Laser Technology 56, 71 (2014).

[8] [8] K. Yu, J. J. Yin, D. X. Haung and J. Q. Bao, Optik- International Journal for Light and Electron Optics 125, 397 (2014).

[9] [9] K. Yu, W. Liu, D. X. Huang and J. Chang, Optics Communications 281, 3709 (2008).

[10] [10] K. Yu, W. Liu, D. X. Huang and J. Chang, Microwave and Optical Technology Letters 50, 2163 (2008).

[11] [11] YU Kan, LIU Wen, HUANG De-xiu and HUANG Hua-mao, Chinese Journal of Lasers 34, 1287 (2007). (in Chinese)

[12] [12] Yu Kan, Huang Dexiu, Fan Ling, Bao Jiaqi and Wu Changfa, Acta Optics Sinica 30, 214 (2010). (in Chinese)

[13] [13] FU Chang-feng, CHEN Xi-ming, LI Lan, HAN Lian-fu and WU Xiao-guo, Optoelectronics Letters 6, 37 (2010).

[14] [14] ZHOU De-rang, DUAN Guo-ping, CHEN Jun-ling, HAN Jun-he and HUANG Ming-ju, Journal of Optoelectronics·Laser 24, 1948 (2013). (in Chinese)

[15] [15] YU Kan, ZHOU Xiao-yang, WANG Jia-qi, XU Jingjing and YIN Juan-juan, Optoelectronics Letters 10, 247 (2014).