[1] J. L. Brooks, R. H. Wentworth, R. C. Youngquist et al.. Coherence multiplexing of fiber-optic interferometric sensors. J. Lightwave Technol., 1985, LT-3(5): 1062～1072
[2] X. Zhou, K. Iiyama, K. Hayashi. Detection scheme of coherence-multiplexed sensor signals using an optical loop with a frequency shifter: sensitivity enhancement. IEEE Photon. Technol. Lett., 1994, 6(6): 767～769
[3] X. Zhou, K. Iiyama, K. Hayashi. Extended-range FMCW reflectometry using an optical loop with a frequency shifter. IEEE Photon. Technol. Lett., 1996, 8(2): 248～25
