[1] Juarez C J, Maier E W, Choi K N, Taylor H F. Distributed fiber-optic intrusion sensor system. Journal of Lightwave Technology, 2005, 23(6): 2081-2087

[2] Anthony W B, Bruce G C, Kellie B. Distributed sensor based on dark-pluse Brillouin scattering. IEEE Photonics Technology Letters, 2005, 17(7): 1501-1503

[3] Handerek V A, Rogers A J, Cokgor I. Detection of localized polarization mode coupling using the optical Kerr effect. In: Proceedings of the 8th Optical Fiber Sensors Conference, 1992, 250-253

[4] Bellemare A, Karasek M, Riviere C, Babin F, He G, Roy V, Schinn G W. A broadly tunable erbium-doped fiber ring laser: experimentation and modeling. IEEE Journal of Quantum Electronics, 2001, 7(1): 22-29

[5] Kurmer J P, Kingsley S A, Laudo J S, Krak S J. Distributed fiber optic acoustic sensor for leak detection. Proceedings of SPIE, 1991, 1586: 117-128

[6] Yamashita S, Nishihara M. Widely tunable erbium-doped fiber ring laser covering both C-band and L-band. IEEE Journal of Quantum Electronics, 2001, 7(1): 41-43

[7] Peter O. Fiber optic sensing boosts pipeline management efficiency. Pipeline and Gas Journal, 1995, 222(2): 44-45

[8] Zhang J. Designing a cost-effective and reliable pipeline leak detection system. Pipes and Pipelines International, 1993, 42(1): 20-26

[9] Chen H X, Babin F, Leblanc M, Schinn G W. Widely tunable singlefrequency erbium-doped fiber lasers. Photonics Technology Letters, 2003, 13(2): 185-188