[1] [1] J. Chen, S. Pu, W. Liao, Y. Chen, and Y. Xia, Laser Optoelectr. Prog. (in Chinese) 12, 42 (2005).

[2] [2] G. Yong, F. Zhen, and J. Huang, Prog. Phys. (in Chinese) 30, 387 (2010).

[3] [3] Y. Miao, B. Liu, K. Zhang, Y. Liu, and Z. Hao, Appl. Phys. Lett. 98, 021103 (2011).

[4] [4] Y. Zhao, R. Lv, Y. Ying, and Q. Wang, Opt. Laser Technol. 44, 899 (2012).

[5] [5] C. Fan, E. Liang, and J. Huang, Front. Phys. 8, 1 (2013).

[6] [6] R. Wang, B. Liang, L. Zhang, and S. Zhuang, Acta Opt. Sin. (in Chinese) 32, 0123001 (2012).

[7] [7] J. Yao, R. Wang, Y. Miao, Y. Lu, X. Zhao, and L. Jing, Chinese J. Lasers (in Chinese) 40, 0101002 (2012).

[8] [8] L. Lei, G. Liu, and Y. Chen, Acta Opt. Sin. (in Chinese) 33, 0123002 (2013).

[9] [9] W. Liang, N. Liu, Z. Li, and P. Lu, Chin. Opt. Lett. 11, S20604 (2013).

[10] [10] P. Zu, C. Chan, T. Gong, Y. Jin, W. Wong, and X. Dong, Appl. Phys. Lett. 101, 241118 (2012).

[11] [11] Y. Xie and Z. Liu, Laser Journal (in Chinese) 6, 34 (2005).

[12] [12] N. A. Yusuf and I. O. Abu-Aljarayesh, Jordan J. Phys. 2, 1 (2009).

[13] [13] W. Brullot, N. K. Reddy, J. Wouters, V. K. Valev, B. Goderis, J. Vermant, and T.Verbiest, J. Magn. Magn. Mater. 324, 1919 (2012).

[14] [14] T. Liu, "Tunable magneto-optical wavelength filter of long–period fiber grating with magnetic fluid", M.S. Thesis (in Chinese) (Shanghai Jiao Tong University, 2007).

[15] [15] A. Su, C. Meng, and Y. Gao, Laser Optoelectr. Prog. 50, 012302 (2012).

[16] [16] J. Yu, W. Zhao, C. Sun, W. Zhang, Z. Hu, and X. Liu, J. Guangdong Univ. Tech. (in Chinese) 26, 46(2009).

[17] [17] S. Y. Yang, Y. F. Chen, H. E. Horng, Chin-Yih Hong, W. S. Tse, and H. C. Yang, Appl. Phys. Lett. 81, 4931(2002).