[3] [3] WU Y, YU C, WU F, et al. A highly sensitive fiber-optic microphone based on graphene oxide membrane[J]. Journal Lightwave Technol., 2017, 35: 4344-4349.

[4] [4] MA J, XUAN H, HO H L, et al. Fiber-optic Fabry-Perot acoustic sensor with multilayer graphene diaphragm[J]. IEEE Photonics Technol. Lett., 2013, 25: 932-935.

[5] [5] FU C, SI W, LI H, et al. A novel high-performance beam-supported membrane structure with enhanced design flexibility for partial discharge detection[J]. Sensors, 2017, 17: 593-598.

[7] [7] WANG Y, NI X, WANG M, et al. Demodulation of an optical fiber MEMS pressure sensor based on single bandpass microwave photonic filter[J]. Opt. Express, 2017, 25: 644-653.

[8] [8] BOCZAR T, BORUCKI S, CICHON A, et al. Application possibilities of artificial neural networks for recognizing partial discharges measured by the acoustic emission method[J]. IEEE Trans. Dielectr. Electr. Insul, 2009, 16: 214-223.

[9] [9] GAO S, ZHANG Y, XIE Q, et al. Research on partial discharge source localization based on an ultrasonic array and a step-by-step over-complete dictionary[J]. Energies, 2017, 10: 567-574.

[10] [10] ROSENTHAL A, RAZANSKY D, NTZIACHRISTOS V. High-sensitivity compact ultrasonic detector based on a pi-phase-shifted fiber Bragg grating[J]. Opt. Lett., 2011, 36: 1833-1835.

[11] [11] SONG L, WANG Z, WANG A, et al. Angular dependence of the frequency response of an extrinsic Fabry-Perot interferometric(EFPI) fiber acoustic sensor for partial discharge detection[J]. JournalLightwave Technol., 2006, 24: 3433-3438.

[12] [12] IEEE. IEEE guide for the detection and location of acoustic emissions from partial discharges in oil-immersed power transformers and reactors: IEEE standard C57.127-2007[S]. Piscataway: IEEE, 2007: 112.

[13] [13] BO D, MING H, ANBO W. Two-wavelength quadrature multipoint detection of partial discharge in power transformers using fiber Fabry-Perot acoustic sensors[C]//SPIE. Proceedings of Fiber Optics sensor and Application. Maryland: SPIE, 2012: 56-63.

[14] [14] WANG L, FANG N. Applications of fiber-optic interferometry technology in sensor fields[M]. Optical Interferometry, 2017.

[15] [15] LEE C E, TAYLOR H F. Sensors for smart structure based upon the Fabry-Perot interferometer[J]. Fiber Optics Smart Structures, 1995(5): 249-269.

[16] [16] LABY T H, KAYE G W C. Table of physicaland chemical constants [M]. New York: Longman, 1973.

[17] [17] ZHANG W, WANG R. An optical fiber Fabry-Perot sensor based on functionalized diaphragm for ultrasound detection and imaging[J]. IEEE Photonics Journal, 2017(9): 1-8.