[1] A.-P. Luo, Z.-C. Luo and W.-C. Xu, Opt. Lett. 34, 2135 (2009).
[2] D. Mechin, P. Yvernault, L. Brilland and D. Pureur, Journal of Lightwave Technology 21, 1411 (2003).
[3] M. Hongyun, W. Xiaowei, S. Wei and H. Xuguang, IEEE Photonics Technology Letters 24, 206 (2012).
[4] J. Sie-Wook, S. Ki-Hee, K. Kwang Taek, M. A. Jung and P. Chang-Soo, IEEE Photonics Technology Letters 23, 1421 (2011).
[5] CHEN Wei-guo, LOU Shu-qin, WANG Li-wen and JIAN Shui-sheng, Journal of Optoelectronics·Laser 22, 175 (2011). (in Chinese)
[6] TANG Chang-ping, DENG Ming, ZHU Tao and RAO Yun-jiang, Journal of Optoelectronics·Laser 22, 1304 (2011). (in Chinese)
[7] T. Zhaobing, S. S. H. Yam, J. Barnes, W. Bock, P. Greig, J. M. Fraser, H. P. Loock and R. D. Oleschuk, IEEE Photonics Technology Letters 20, 626 (2008).
[8] A. Rahmouni, N. Azami and F. Abdi, Numerical Analysis of Athermal DPSK based on Unbalanced Thermally Expanded Core Optical Fibers Mach Zehnder Interferometer, 5th International Symposium on I/V Communications and Mobile Network (ISVC), 1 (2010).
[9] Y. Kim, N. Kim, Y. Chung, U.-C. Paek and W.-T. Han, Opt. Express 12, 651 (2004).
[10] L. V. Nguyen, D.-s. Hwang, D. S. Moon and Y. Chung, Optics Communications 281, 5793 (2008).
