[1] Cai H W, Ye Q, Wang Z Y et al. Distributed optical fiber acoustic sensing technology based on coherent Rayleigh scattering[J]. Laser & Optoelectronics Progress, 57, 050001(2020).

[2] Juarez J C, Taylor H F. Field test of a distributed fiber-optic intrusion sensor system for long perimeters[J]. Applied Optics, 46, 1968-1971(2007).

[3] Wu H J, Li X Y, Peng Z P et al. A novel intrusion signal processing method for phase-sensitive optical time-domain reflectometry (Φ-OTDR)[J]. Proceedings of SPIE, 9157, 91575O(2014).

[4] Huang J F, Xu T W, Feng S W et al. Multiple disturbance detection and intrusion recognition in distributed acoustic sensing[J]. Proceedings of SPIE, 10849, 108490E(2018).

[5] Wang Z Y, Pan Z Q, Ye Q et al. Fast pattern recognition based on frequency spectrum analysis used for intrusion alarming in optical fiber fence[J]. Chinese Journal of Lasers, 42, 0405010(2015).

[6] Tejedor J, Martins H F, Piote D et al. Toward prevention of pipeline integrity threats using a smart fiber-optic surveillance system[J]. Journal of Lightwave Technology, 34, 4445-4453(2016).

[7] Stajanca P, Chruscicki S, Homann T et al. Detection of leak-induced pipeline vibrations using fiber: optic distributed acoustic sensing[J]. Sensors, 18, 2841-2859(2018).

[8] Tejedor J, Macias-Guarasa J, Martins H F et al. A novel fiber optic based surveillance system for prevention of pipeline integrity threats[J]. Sensors (Basel, Switzerland), 17, E355(2017).

[9] 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).

[10] Peng F, Duan N, Rao Y J et al. Real-time position and speed monitoring of trains using phase-sensitive OTDR[J]. IEEE Photonics Technology Letters, 26, 2055-2057(2014).

[11] Ferguson R J, McDonald M A D, Basto D J. Take the Eh? train: distributed acoustic sensing (DAS) of commuter trains in a Canadian city[J]. Journal of Applied Geophysics, 183, 104201(2020).

[12] Wang Z Y, Lu B, Zheng H R et al. Novel railway-subgrade vibration monitoring technology using phase-sensitive OTDR[C](2017).

[13] Mateeva A, Lopez J, Potters H et al. Distributed acoustic sensing for reservoir monitoring with vertical seismic profiling[J]. Geophysical Prospecting, 62, 679-692(2014).

[14] Miller D, Parker T, Kashikar S et al. Vertical seismic profiling using a fibre-optic cable as a distributed acoustic sensor[C](2012).

[15] Byerley G, Monk D, Aaron P et al. Time-lapse seismic monitoring of individual hydraulic frac stages using a downhole DAS array[J]. The Leading Edge, 37, 802-810(2018).

[16] Taylor H F, Lee C E. Apparatus and method for fiber optic intrusion sensing[P].

[17] Froggatt M, Moore J. High-spatial-resolution distributed strain measurement in optical fiber with Rayleigh scatter[J]. Applied Optics, 37, 1735-1740(1998).

[18] Liu Q W, Fan X Y, He Z Y. Time-gated digital optical frequency domain reflectometry with 1.6-m spatial resolution over entire 110-km range[J]. Optics Express, 23, 25988-25995(2015).

[19] Pastor-Graells J, Martins H F, Garcia-Ruiz A et al. Single-shot distributed temperature and strain tracking using direct detection phase-sensitive OTDR with chirped pulses[J]. Optics Express, 24, 13121-13133(2016).

[20] Pan Z Q, Liang K Z, Zhou J et al. Interference-fading-free phase-demodulated OTDR system[J]. Proceedings of SPIE, 8421, 842129(2012).

[21] He X G, Liu F, Qin M Z et al. Phase-sensitive optical time-domain reflectometry with heterodyne demodulation[J]. Proceedings of SPIE, 10323, 103235Q(2017).

[22] Wang Z Y, Lu B, Ye Q et al. Recent progress in distributed fiber acoustic sensing with Φ-OTDR[J]. Sensors, 20, 6594-6620(2020).

[23] Pan Z Q, Liang K Z, Ye Q et al. Phase-sensitive OTDR system based on digital coherent detection[C](2011).

[24] 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).

[25] 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).

[26] 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).

[27] Muanenda Y, Faralli S, Oton C J et al. Stable dynamic phase demodulation in a DAS based on double-pulse Φ-OTDR using homodyne demodulation and direct detection[J]. Proceedings of SPIE, 10654, 106540B(2018).

[28] Sheng Q H, Yu Z, Lu B et al. Real-time phase-sensitive optical time-domain reflectometry signal processing system based on heterogeneous accelerated computing[J]. Chinese Journal of Lasers, 47, 0104002(2020).

[29] Zhang X P, Ding Z W, Hong R et al. Phase sensitive optical time-domain reflective distributed optical fiber sensing technology[J]. Acta Optica Sinica, 41, 0106004(2021).

[30] Ma H Y, Wang X X, Ma F et al. Research progress of Φ-OTDR distributed optical fiber acoustic sensor[J]. Laser & Optoelectronics Progress, 57, 130005(2020).

[31] Wang Z, Pan Z, Fang Z et al. Ultra-broadband phase-sensitive optical time-domain reflectometry with a temporally sequenced multi-frequency source[J]. Optics Letters, 40, 5192-5195(2015).

[32] Zhang J D, Zhu T, Zheng H et al. Breaking through the bandwidth barrier in distributed fiber vibration sensing by sub-Nyquist randomized sampling[J]. Proceedings of SPIE, 10323, 103238H(2017).

[33] Song M P, Zhuang S W, Wang Y X. High-frequency vibration detection of phase-sensitive optical time-domain reflectometer[J]. Chinese Journal of Lasers, 47, 0506001(2020).

[34] Lu B, Zheng H R, Wang Z Y et al. High spatial resolution Φ-OTDR with long sensing distance[C], ThE25(2018).

[35] Chen D, Liu Q W, He Z Y. 108-km distributed acoustic sensor with 220-pε/√Hz strain resolution and 5-m spatial resolution[J]. Journal of Lightwave Technology, 37, 4462-4468(2019).

[36] Feng S W, Xu T W, Huang J F et al. Sub-meter spatial resolution phase-sensitive optical time-domain reflectometry system using double interferometers[J]. Applied Sciences, 8, 1899-1907(2018).

[37] Masoudi A, Newson T P. High spatial resolution distributed optical fiber dynamic strain sensor with enhanced frequency and strain resolution[J]. Optics Letters, 42, 290-293(2017).

[38] Gu J F, Lu B, Yang J Q et al. High SNR Φ-OTDR based on frequency and wavelength diversity with differential vector aggregation method[J]. IEEE Photonics Journal, 12, 1-12(2020).

[39] Pastor-Graells J, Cortés L R, Martins H F et al. 20 dB SNR enhancement in phase-sensitive OTDR using pulse stretching and recompression[J]. Proceedings of SPIE, 10323, 103230R(2017).

[40] Martins H F, Martin-Lopez S, Corredera P et al. Distributed vibration sensing over 125 km with enhanced SNR using phi-OTDR over a URFL cavity[J]. Journal of Lightwave Technology, 33, 2628-2632(2015).

[41] Gu J F, Lu B, Yang J Q et al. Distributed acoustic sensing based on a multi-core fiber[J]. Acta Optica Sinica, 41, 0706003(2021).

[42] Eyal A, Gabai H, Shpatz I. Distributed acoustic sensing: How to make the best out of the Rayleigh-backscattered energy?[J]. Proceedings of SPIE, 10323, 103230I(2017).

[43] Costa L, Martins H F, Martín-López S et al. Fully distributed optical fiber strain sensor with 10‒12 ε/√Hz sensitivity[J]. Journal of Lightwave Technology, 37, 4487-4495(2019).

[44] Reinsch T, Thurley T, Jousset P. On the mechanical coupling of a fiber optic cable used for distributed acoustic/vibration sensing applications: a theoretical consideration[J]. Measurement Science and Technology, 28, 127003(2017).

[45] Yan A D, Huang S, Li S et al. Distributed optical fiber sensors with ultrafast laser enhanced Rayleigh backscattering profiles for real-time monitoring of solid oxide fuel cell operations[J]. Scientific Reports, 7, 9360(2017).

[46] Tejedor J, Macias-Guarasa J, Martins H F et al. A Gaussian Mixture Model-Hidden Markov Model (GMM-HMM)-based fiber optic surveillance system for pipeline integrity threat detection[C], WF36(2018).

[47] Chen J P, Wu H J, Liu X R et al. A real-time distributed deep learning approach for intelligent event recognition in long distance pipeline monitoring with DOFS[C], 290-2906(2018).

[48] Bernard M T F, Han D, An B. Pattern recognition algorithm and software design of an optical fiber vibration signal based on Φ-optical time-domain reflectometry[J]. Applied Optics, 58, 8423-8432(2019).

[49] Wu Y Q, Gan J L, Li Q Y et al. Distributed fiber voice sensor based on phase-sensitive optical time-domain reflectometry[J]. IEEE Photonics Journal, 7, 1-10(2015).

[50] Masoudi A, Belal M, Newson T P. Distributed optical fibre audible frequency sensor[J]. Proceedings of SPIE, 9157, 91573T(2014).

[51] Rohwetter P, Eisermann R, Krebber K. Distributed acoustic sensing: towards partial discharge monitoring[J]. Proceedings of SPIE, 9634, 96341C(2015).

[52] Franciscangelis C, Margulis W, Floridia C et al. Vibration measurement on composite material with embedded optical fiber based on phase-OTDR[J]. Proceedings of SPIE, 101683Q(10168).

[53] Liang J J, Wang Z Y, Lu B et al. Distributed acoustic sensing for 2D and 3D acoustic source localization[J]. Optics Letters, 44, 1690-1693(2019).

[54] Wang Z Y, Zheng H R, Li L C et al. Practical multi-class event classification approach for distributed vibration sensing using deep dual path network[J]. Optics Express, 27, 23682-23692(2019).

[55] Thomas M D, Barry M F, Aio-Franklin J B et al. Field test of fiber-optic distributed acoustic sensing (DAS) for subsurface seismic monitoring[J]. The Leading Edge, 32, 699-706(2013).

[56] Jousset P, Reinsch T, Ryberg T et al. Dynamic strain determination using fibre-optic cables allows imaging of seismological and structural features[J]. Nature Communications, 9, 2509(2018).

[57] Lindsey N J, Dawe T C, Ajo-Franklin J B. Illuminating seafloor faults and ocean dynamics with dark fiber distributed acoustic sensing[J]. Science, 366, 1103-1107(2019).

[58] Dou S, Lindsey N, Wagner A M et al. Distributed acoustic sensing for seismic monitoring of the near surface: a traffic-noise interferometry case study[J]. Scientific Reports, 7, 11620(2017).

[59] Fang Z J, Chin K K, Qu R H et al[M]. Fundamentals of optical fiber sensors(2012).

[60] Jia H Z, Liang S, Lou S Q et al. A k -nearest neighbor algorithm-based near category support vector machine method for event identification of φ-OTDR[J]. IEEE Sensors Journal, 19, 3683-3689(2019).

[61] Tejedor J, Macias-Guarasa J, Martins H F et al. A contextual GMM-HMM smart fiber optic surveillance system for pipeline integrity threat detection[J]. Journal of Lightwave Technology, 37, 4514-4522(2019).

[62] Tejedor J, Macias-Guarasa J, Martins H et al. Machine learning methods for pipeline surveillance systems based on distributed acoustic sensing: a review[J]. Applied Sciences, 7, 841-867(2017).

[63] Aktas M, Akgun T, Demircin M U et al. Deep learning based multi-threat classification for phase-OTDR fiber optic distributed acoustic sensing applications[J]. Proceedings of SPIE, 10208, 102080G(2017).

[64] Wang Z Y, Pan Z Q, Ye Q et al. Novel distributed passive vehicle tracking technology using phase sensitive optical time domain reflectometer[J]. Chinese Optics Letters, 13, 100603(2015).

[65] Cedilnik G, Hunt R, Lees G. Advances in train and rail monitoring with DAS[C], ThE35(2018).

[66] Shpalensky N, Shiloh L, Gabai H et al. Use of distributed acoustic sensing for Doppler tracking of moving sources[J]. Optics Express, 26, 17690-17696(2018).

[67] Ku E M, Duckworth G L. Tracking a human walker with a fiber optic distributed acoustic sensor[J]. Proceedings of Meetings on Acoustics, 19, 070053(2013).

[68] Parker T, Shatalin S, Farhadiroushan M. Distributed acoustic sensing: a new tool for seismic applications[J]. First Break, 32, 61-69(2014).

[69] Zhou Z X, Zhuang S L. A lateral locating method for optical fiber distributed intrusion sensing system[J]. Optics Communications, 333, 1-5(2014).

[70] Bakku S K. Fracture characterization from seismic measurements in a borehole[D](2015).

[71] Ivan L C N, Sava P. Multicomponent distributed acoustic sensing: concept and theory[J]. Geophysics, 83, P1-P8(2018).

[72] Wang Z Y, Yang J Q, Gu J F et al. Multi-source aliasing suppression for distributed fiber acoustic sensing with directionally coherent enhancement technology[J]. Optics Letters, 45, 5672-5675(2020).

[73] Munn J D, Coleman T I, Parker B L et al. Novel cable coupling technique for improved shallow distributed acoustic sensor VSPs[J]. Journal of Applied Geophysics, 138, 72-79(2017).

[74] Dean T, Cuny T, Hartog A H. The effect of gauge length on axially incident P-waves measured using fibre optic distributed vibration sensing[J]. Geophysical Prospecting, 65, 184-193(2017).

[75] Willis M E, Barfoot D, Ellmauthaler A et al. Quantitative quality of distributed acoustic sensing vertical seismic profile data[J]. The Leading Edge, 35, 605-609(2016).

[76] Harris K, White D, Melanson D et al. Feasibility of time-lapse VSP monitoring at the Aquistore CO2 storage site using a distributed acoustic sensing system[J]. International Journal of Greenhouse Gas Control, 50, 248-260(2016).

[77] Daley T M, Miller D E, Dodds K et al. Field testing of modular borehole monitoring with simultaneous distributed acoustic sensing and geophone vertical seismic profiles at Citronelle, Alabama[J]. Geophysical Prospecting, 64, 1318-1334(2016).

[78] Correa J, Egorov A, Tertyshnikov K et al. Analysis of signal to noise and directivity characteristics of DAS VSP at near and far offsets: a CO2CRC Otway project data example[J]. The Leading Edge, 36, 994a1-994a7(2017).

[79] Correa J, Pevzner R, Bona A et al. 3D vertical seismic profile acquired with distributed acoustic sensing on tubing installation: a case study from the CO2CRC Otway project[J]. Interpretation, 7, SA11-SA19(2019).

[80] Michlmayr G, Chalari A, Clarke A et al. Fiber-optic high-resolution acoustic emission (AE) monitoring of slope failure[J]. Landslides, 14, 1139-1146(2017).

[81] Walter F, Gräff D, Lindner F et al. Distributed acoustic sensing of microseismic sources and wave propagation in glaciated terrain[J]. Nature Communications, 11, 2436(2020).

[82] Martin E R, Huot F, Ma Y B et al. A seismic shift in scalable acquisition demands new processing: fiber-optic seismic signal retrieval in urban areas with unsupervised learning for coherent noise removal[J]. IEEE Signal Processing Magazine, 35, 31-40(2018).

[83] Ajo-Franklin J B, Dou S, Lindsey N J et al. Distributed acoustic sensing using dark fiber for near-surface characterization and broadband seismic event detection[J]. Scientific Reports, 9, 1328(2019).

[84] Wu M, Fan X, Liu Q et al. Quasi-distributed fiber-optic acoustic sensing system based on pulse compression technique and phase-noise compensation[J]. Optics Letters, 44, 5969-5972(2019).

[85] Huot F, Biondi B. Machine learning algorithms for automated seismic ambient noise processing applied to DAS acquisition[C], W20-03(2018).