[1] S. J. Spammer, P. L. Swart, and A. A. Chtcherbakov, “Merged Sagnac-Michelson interferometer for distributed disturbance detection,” Journal of Lightwave Technology, 1997, 15(6): 972 976.
[2] A. A. Chtcherbakov, P. L. Swart, S. J. Spammer, and B. M. Lacquet, “Modified Sagnac/Mach-Zehnder interferometer for distributed disturbance sensing,” Microwave and Optical Technology Letters, 1999, 20(1): 34 36.
[3] S. J. Russell, K. R. C. Brady, and J. P. Dakin, “Real -time location of multiple time-varying strain disturbances acting over a 40 km fiber section using a novel dual-Sagnac interferometer,” Journal of Lightwave Technology, 2001, 19(2): 205 213.
[4] X. Hong, J. Wu, C. Zuo, F. Liu, H. Guo, and K. Xu, “Dual Michelson interferometers for distributed vibration detection,” Applied Optics, 2011, 50(22): 4333 4338.
[5] Q. Sun, D. Liu, J. Wang, and H. Liu, “Distributed fiber-optic vibration sensor using a ring Mach- Zehnder interferometer,” Optics Communications, 2008, 281(6): 1538 1544.
[6] X. J. Fang, “Fiber-optic distributed sensing by a two-loop Sagnac interferometer,” Optics Letters, 1996, 21(6): 444 446.
[7] J. C. Juarez, E. W. Maier, K. N. Choi, and H. F. Taylor, “Distributed fiber-optic intrusion sensor system,” Journal of Lightwave Technology, 2005, 23(6): 2081 2087.
[8] J. C. Juarez and H. F. Taylor, “Field test of a distributed fiber-optic intrusion sensor system for long perimeters,” Applied Optics, 2007, 46(11): 1968 1971.
[9] Y. Dong, L. Chen, and X. Bao, “Time-division multiplexing-based BOTDA over 100 km sensing length,” Optics Letters, 2011, 36(2): 277 279.
[10] T. Zhu, Q. He, X. Xiao, and X. Bao, “Modulated pulses based distributed vibration sensing with high frequency response and spatial resolution,” Optics Express, 2013, 21(3): 2953 2963.
[11] M. D. Todd, M. Seaver, and F. Bucholtz, “Improved, operationally-passive interferometric demodulation method using 3×3 coupler,” Electronics Letters, 2002, 38(15): 784 786.
