[1] Cai H W, Ye Q, Wang Z Y et al. Progress in research of distributed fiber acoustic sensing techniques[J]. Journal of Applied Sciences, 36, 41-58(2018).
[2] Liu J X. Research progress of
[5] Taylor H F, Lee C E.Apparatus. -03-16[P]. method for fiber optic intrusion sensing: US005194847A .(1993).
[6] Juarez J C, Taylor H F. Polarization discrimination in a phase-sensitive optical time-domain reflectometer intrusion-sensor system[J]. Optics Letters, 30, 3284-3286(2005).
[7] Lu Y L, Zhu T, Chen L et al. Distributed vibration sensor based on coherent detection of phase-OTDR[J]. Journal of Lightwave Technology, 28, 3243-3249(2010).
[8] Fang X D. Distributed optical seismic wave sensing system and its application in exploration[D]. Chengdu: University of Electronic Science and Technology of China, 23-24(2018).
[9] Park J, Wanku L E, Henry F. Fiber optic intrusion sensor with the configuration of an optical time-domain reflectometer using coherent interference of Rayleigh backscattering. [C]∥Proc SPIE 3555, Optical and Fiber Optic Sensor Systems, 49-56(1998).
[10] Choi K N, Taylor H F. Spectrally stable Er-fiber laser for application in phase-sensitive optical time-domain reflectometry[J]. IEEE Photonics Technology Letters, 15, 386-388(2003).
[11] Juarez J C, Maier E W, Choi K N et al. Distributed fiber-optic intrusion sensor system[J]. Journal of Lightwave Technology, 23, 2081-2087(2005).
[13] Rao Y J, Luo J, Ran Z L et al. Long-distance fiber-optic Φ-OTDR intrusion sensing system[J]. Proceedings of SPIE, 7503, 75031O(2009).
[14] Martins H F, Martin-Lopez S, Corredera P et al. Coherent noise reduction in high visibility phase-sensitive optical time domain reflectometer for distributed sensing of ultrasonic waves[J]. Journal of Lightwave Technology, 31, 3631-3637(2013).
[16] Fang G S, Xu T W, Feng S W et al. Phase-sensitive optical time domain reflectometer based on phase-generated carrier algorithm[J]. Journal of Lightwave Technology, 33, 2811-2816(2015).
[17] Wang C, Wang C, Shang Y et al. Distributed acoustic mapping based on interferometry of phase optical time-domain reflectometry[J]. Optics Communications, 346, 172-177(2015).
[18] Wang D W, Feng H, Yang Y et al. Study on leakage identification method of water supply pipeline based on Φ-OTDR optical fiber sensing technology[J]. Chinese Journal of Scientific Instrument, 38, 830-837(2017).
[19] Wang Y. Research on key technology of fiber-optic vibration sensing based on Φ-OTDR[D]. Chengdu:University of Electronic Science and Technology(2018).
[21] Wang P F, Dong Q, Liu X et al. Coalbed methane transport pipeline intrusion detection system based on Φ-OTDR[J]. Chinese Journal of Sensors and Actuators, 32, 144-149(2019).
[23] Pan Z Q, Liang K Z, Ye Q et al. Phase-sensitive OTDR system based on digital coherent detection. [C]∥Optical Sensors and Biophotonics, Shanghai. Washington, D.C.: OSA, 1-6(2011).
[24] Pan Z Q, Liang K Z, Zhou J et al. Interference-fading-free phase-demodulated OTDR system[J]. Proceedings of SPIE, 8421, 842129(2012).
[26] Masoudi A, Belal M, Newson T P. A distributed optical fibre dynamic strain sensor based on phase-OTDR[J]. Measurement Science and Technology, 24, 085204(2013).
[28] Peng F, Peng Z P, Jia X H et al. 128 km fully-distributed high-sensitivity fiber-optic intrusion sensor with 15m spatial resolution. [C]∥Optical Fiber Communication Conference, San Francisco, California. Washington, D.C.: OSA(2014).
[30] Zhang X P, Sun Z H, Shan Y Y et al. A high performance distributed optical fiber sensor based on Φ-OTDR for dynamic strain measurement[J]. IEEE Photonics Journal, 3, 1-12(2017).
[31] Lu B, Pan Z Q, Wang Z Y et al. High spatial resolution phase-sensitive optical time domain reflectometer with a frequency-swept pulse[J]. Optics Letters, 42, 391-394(2017).
[33] Dorize C, Awwad E, Renaudier J. High sensitivity Φ-OTDR over long distance with polarization multiplexed codes[J]. IEEE Photonics Technology Letters, 31, 1654-1657(2019).
[34] Ma G M, Shi C, Qin W Q et al. A non-intrusive electrical discharge localization method for gas insulated line based on phase-sensitive OTDR and Michelson interferometer[J]. IEEE Transactions on Power Delivery, 34, 1324-1331(2019).
[35] Zhang P. Study on methods of the dynamic demodulation for optical fiber Fabry-Perot sensors[D]. Wuhan: Wuhan University of Technology, 12-14(2013).
[36] Yin C. Phase demodulation technology of quantitative detection phase-sensitive optical time domain reflectometer[D]. Hangzhou: Zhejiang University, 15-19(2018).
[37] Dandridge A, Tveten A, Giallorenzi T. Homodyne demodulation scheme for fiber optic sensors using phase generated carrier[J]. IEEE Journal of Quantum Electronics, 18, 1647-1653(1982).
[38] Huo H L, Hang L J. Development of PGC digital homodyne demodulation system for interferometric fiber-optic hydrophone[J]. Chinese Journal of Scientific Instrument, 27, 1457-1459(2006).
[39] He J, Wang L, Li F et al. An ameliorated phase generated carrier demodulation algorithm with low harmonic distortion and high stability[J]. Journal of Lightwave Technology, 28, 3258-3265(2010).
[40] Shang Y, Yang Y H, Wang C et al. Optical fiber distributed acoustic sensing based on the self-interference of Rayleigh backscattering[J]. Measurement, 79, 222-227(2016).
[42] Zhang S. Research on eliminating light intensity disturbance in the fiber-optic sensor based on PGC demodulation algorithms[D]. Tianjin: Tianjin University of Technology, 28-41(2016).
[43] Muanenda Y, Faralli S, Oton C J et al. Dynamic phase extraction in a modulated double-pulse Φ-OTDR sensor using a stable homodyne demodulation in direct detection[J]. Optics Express, 26, 687-701(2018).
[45] Koo K P, Tveten A B, Dandridge A. Passive stabilization scheme for fiber interferometers using (3×3) fiber directional couplers[J]. Applied Physics Letters, 41, 616-618(1982).
[46] Sheem S K, Giallorenzi T G, Koo K. Optical techniques to solve the signal fading problem in fiber interferometers[J]. Applied Optics, 21, 689-693(1982).
[50] Wang Z N, Zhang L, Wang S et al. Coherent Φ-OTDR based on I/Q demodulation and homodyne detection[J]. Optics Express, 24, 853-858(2016).
[51] Martins H F, Shi K, Thomsen B C et al. Real time dynamic strain monitoring of optical links using the backreflection of live PSK data[J]. Optics Express, 24, 22303-22318(2016).
[52] Sha Z, Feng H, Zeng Z M. Phase demodulation method in phase-sensitive OTDR without coherent detection[J]. Optics Express, 25, 4831-4844(2017).
[53] Yuan Q. Phase sensitive optical time domain reflectometry based on frequency drift compensation[D]. Nanjing: Nanjing University, 37-41(2018).