[1] Yuefang Yang, Chong Kang, Zongjun Huang, Xiaojun Zhang, Yang Zhang, Dawei Wang and Jiajie Liu, The Study of Optical Fiber Ring Interference Weak Magnetic Field Sensor, 10th Russian-Chinese Symposium on Laser Physics and Laser Technologies and Academic Symposium on Optoelectronics Technology, 283 (2010).

[2] Qibiao Ou, Qingke Zeng, Zixiong Qing and Chuanqi Li, Journal of Optoelectronics·Laser 24, 323 (2013). (in Chinese)

[3] Jie Shi, Shilin Xiao, Miehua Bi, Lilin Yi and Pei Yang, Applied Optics 51, 2733 (2012).

[4] Zhaoxia Sheng, Yaofei Chen and Qun Han, Journal of Optoelectronics·Laser 25, 1044 (2014). (in Chinese)

[5] Tao Li, Yutang Dai and Qiancheng Zhao, Journal of Optoelectronics·Laser 25, 625 (2014). (in Chinese)

[6] Chinyin Hong, S. Y. Yang, H. E. Hong and H. C. Yang, Journal of Applied Physics 94, 3849 (2003).

[7] Jixiang Dai, Minghong Yang, Xiaobing Li, Hongliang Liu and Xinglin Tong, Optical Fiber Technology 17, 210 (2011).

[8] Ting Liu, Xianfeng Chen, Ziyun Di, Junfeng Zhang, Xinwan Li and Jianping Chen, Applied Physics Letters 91, 12116 (2009).

[9] M. Konstantaki, A. Candiani and S. Pissadakis, Magnetic Tuning of Optical Fibre Long Period Gratings Utilizing Ferrofluids, 11th International Conference on Transparent Optical Networks, 1 (2009).

[10] Peng Zu, Wanghua Xiang, Yangbo Bai and Yongxing Jin, Acta Optica Sinica 31, 8 (2011). (in Chinese)

[11] Shuo Yuan, Zhengrong Tong, Junfa Zhao, Weihua Zhang and Ye Cao, Optics Communications 332, 154 (2014).

[12] Nguyen Linh Viet, Hwang Dusun, Moon Sucbei, Moon Dae Seung and Chung Youngjoo, Optics Express 16, 11369 (2008).