[1] K. Saitoh, Y. Sato and M. Koshiba, Opt. Express 12, 3940 (2004).
[2] L. Rosa, F. Poli, M. Foroni, A. Cucinotta and S. Selleri, Optics Letters 31, 441 (2006).
[3] W. Lu, S. Lou, X. Wang, L. Wang and R. Feng, Applied Optics 52, 449 (2013).
[4] Z. Zhang, Y. Tsuji and M. Eguchi, Journal of Lightwave Technology 32, 3956 (2014).
[5] H. Jiang, E. Wang, J. Zhang, L. Hu, Q. Mao, Q. Li and K. Xie, Opt. Express 22, 30461 (2014).
[6] S. Liu, S. H. Li and Y. Du, Optics & Laser Technology 44, 1813 (2012).
[7] M. Y. Chen, B. Sun, Y. K. Zhang and X. X. Fu, Applied Optics 49, 3042 (2010).
[8] J. Li, J. Wang, R. Wang and Y. Liu, Optics & Laser Technology 43, 795 (2011).
[9] I. Malitson, Journal of the Optical Society of America 55, 1205 (1965).
[10] R. A. Forber and E. Marom, IEEE Journal of Quantum Electronics 22, 911 (1986).
[11] S. Lou, Z. Tang and L. Wang, Applied Optics 50, 2016 (2011).