[1] Wei He, Lianqing Zhu, Xiaoping Lou, Mingli Dong, Yinmin Zhang, Fei Luo and Xiaohuai Chen, Journal of Optoelectronics·Laser 25, 1081 (2014). (in Chinese)

[2] Silvia Diaz and Manuel Lopez-Amo, Optical Engineering 53, 036106 (2014).

[3] Tiegang Sun, Yubin Guo, Tianshu Wang, Jiayu Huo and Le Zhang, Optics and Laser Technology 67, 143 (2015).

[4] Ye Cao, Guoqiang Jia, Junfa Zhao and Zhengrong Tong, Journal of Optoelectronics·Laser 24, 833 (2013). (in Chinese)

[5] Xiaohui Li, Xueming Liu, Dong Mao, Xiaohong Hu and Hua Lu, Optical Engineering 49, 094303 (2010).

[6] Jianqun Cheng, Jianrong Qiu and Shuangchen Ruan, Optics and Laser Technology 58, 110 (2014).

[7] Hui Zou, Shuqin Lou, Guolu Yin and Wei Su, IEEE Photonics Technology Letters 25, 1003 (2013).

[8] Xiaoying He, D. N. Wang and C. R. Liao, Journal of Lightwave Technology 29, 842 (2011).

[9] Hae Young Choi, Myoung Jin Kim and Byeong Ha Lee, Optics Express 15, 5711 (2007).

[10] Zhibo Liu, Yang Li, Yan Liu, Zhongwei Tan and Shuisheng Jian, IEEE Photonics Technology Letters 25, 2050 (2013).

[11] Hui Zou, Shuqin Lou and Guolu Yin, Optics and Laser Technology 45, 629 (2013).

[12] Xia Hao, Zhengrong Tong, Weihua Zhang and Ye Cao, Optics Communications 335, 78 (2015).

[13] Lin Ma, Yanhui Qi, Zexin Kang, Yunlong Bai and Shuisheng Jian, Optics and Laser Technology 57, 96 (2014).