Acoustic sensing is nowadays a very demanding field which plays an important role in modern society, with applications spanning from structural health monitoring to medical imaging. Fiber-optics can bring many advantages to this field, and fiber-optic acoustic sensors show already performance levels capable of competing with the standard sensors based on piezoelectric transducers. This review presents the recent advances in the field of fiber-optic dynamic strain sensing, particularly for acoustic detection. Three dominant technologies are identified – fiber Bragg gratings, interferometric Mach-Zehnder, and Fabry-Pérot configurations – and their recent developments are summarized.
J. A. Bucaro, H. D. Dardy, and E. F. Carome, “Optical fiber acoustic sensor,” Applied Optics, 16(7): 1761–1762, 1977.
J. A. Bucaro, H. D. Dardy, and E. F. Carome, “Fiber-optic hydrophone,” Journal of the Acoustical Society of America, 62(5): 1302–1304, 1977.
J. H. Cole, R. L. Johnson, and P. G. Bhuta, “Fiber-optic detection of sound,” Journal of the Acoustical Society of America, 62(5): 1136–1138, 1977.
A. I. Hernández-Serrano, G. Salceda-Delgado, D. Moreno-Hernández, A. Martínez-Ríos, and D. Monzón-Hernández, “Robust optical fiber bending sensor to measure frequency of vibration,” Optics and Lasers in Engineering, 51(9): 1102–1105, 2013.
X. Hong, J. Wu, C. Zuo, F. Liu, H. Guo, and K. Xu, “Dual Michelson interferometers for distributed vibration detection,” Applied Optics, 50(22): 4333–4338, 2011.
J. L. Rivera, M. P. Sánchez, A. Miridonov, and S. Stepanov, “Adaptive Sagnac interferometer with dynamic population grating in saturable rare-earth-doped fiber,” Optics Express, 21(4): 4280–4290, 2013.
S. E. U. Lima, O. Frazão, F. M. Araújo, L. A. Ferreira, V. Miranda, and J. L. Santos, “Extrinsic and intrinsic fiber optic interferometric sensors for acoustic detection in high-voltage environments,” Optical Engineering, 48(2): 024401, 2009.
A. Wada, S. Tanaka, and N. Takahashi, “Optical fiber vibration sensor using FBG Fabry-Pérot interferometer with wavelength scanning and Fourier analysis,” IEEE Journal Sensors, 12(1): 225–339, 2012.
G. Wild and S. Hinckley, “Acousto-ultrasonic optical fiber sensors: overview and state-of-the-art,” IEEE Journal Sensors, 8(7): 1184–1193, 2008.
S. E. U. Lima, O. Frazão, R. G. Farias, F. M. Araújo, L. A. Ferreira, J. L. Santos, et al., “Mandrel-based fiber-optic sensors for acoustic detection of partial discharges — a proof of concept,” IEEE Transactions on Power Delivery, 25(4): 2526–2534, 2010.
O. Kilic, M. J. F. Digonnet, G. S. Kino, and O. Solgaard, “Miniature photonic-crystal hydrophone optimized for ocean acoustics,” Journal of the Acoustical Society of America, 129(4): 1837–1850, 2011.
N. Lagakos, T. R. Hickman, P. Ehrenfeuchter, J. A. Bucaro, and A. Dandridge, “Planar flexible fiber-optic acoustic sensors,” Journal of Lightwave Technology, 8(9): 1298–1303, 1990.
G. B. Hocker, “Fiber optic acoustic sensors with increased sensitivity by use of composite structures,” Optics Letters, 4(10): 320–321, 1979.
G. B. Hocker, “Fiber optic acoustic sensors with composite structure: an analysis,” Applied Optics, 18(21): 3679–3683, 1979.
M. Imai, T. Ohashi, and Y. Ohtsuka, “Fiber-optic Michelson interferometer using an optical power divider,” Optics Letters, 5(10): 418–420, 1980.
M. Imai, T. Ohashi, and Y. Ohtsuka, “High-sensitive all-fiber Michelson interferometer by use of differential output configuration,” Optics Communications, 39(1–2): 7–10, 1981.
B. J. Vakoc, M. J. F. Digonnet, and G. S. Kino, “A novel fiber-optic sensor array based on the Sagnac interferometer,” Journal of Lightwave Technology, 17(11): 2316–2326, 1999.
K. A. Murphy, M. F. Gunther, A. M. Vengsarkar, and R. O. Claus, “Quadrature phase-shifted, extrinsic Fabry-Pérot optical fiber sensors,” Optics Letters, 16(4): 273–275, 1991.
F. Xu, D. Ren, X. Shi, C. Li, W. Lu, L. Lu, et al., “High-sensitivity Fabry-Pérot interferometric pressure sensor based on a nanothick silver diaphragm,” Optics Letters, 37(2): 133–135, 2012.
J. Ma, W. Jin, H. L. Ho, and J. Y. Dai, “High-sensitivity fiber-tip pressure sensor with graphene diaphragm”, Optics Letters, 37(13): 2493–2495, 2012.
J. Ma, H. Xuan, H. L. Ho, W. Jin, Y. Yang, and S. Fan, “Fiber-optic Fabry-Pérot acoustic sensor with multilayer graphene diaphragm,” IEEE Photonics Technology Letters, 25(10): 932–935, 2013.
R. E. Silva and A. A. P. Pohl, “Characterization of flexural acoustic waves in optical fibers using an extrinsic Fabry-Pérot interferometer,” Measurement Science and Technology, 23(5): 055206, 2012.
J. Chen, W. Li, H. Jiang, and Z. Li, “Stabilization of a fiber Fabry-Pérot interferometric acoustic wave sensor,” Optik, 124(4): 339–342, 2013.
X. Zou, N. Wu, Y. Tian, Y. Zhang, J. Fitek, M. Maffeo, et. al., “Ultrafast Fabry-Pérot fiber-optic pressure sensors for multimedia blast event measurements,” Applied Optics, 52(6): 1248–1254, 2013.
Q. Wang and Z. Ma, “Feedback-stabilized interrogation technique for optical Fabry-Pérot acoustic sensor using a tunable fiber laser,” Optics & Laser Technology, 51: 43–46, 2013.
Q. Yu and X. Zhou, “Pressure sensor based on the fiber-optic extrinsic Fabry-Pérot interferometer,” Photonic Sensors, 1(1): 72–73, 2011.
J. H. Cole, C. Kirkendall, A. Dandridge, G. Cogdell, and T. G. Giallirenzi, “Twenty-five years of interferometric fiber optic acoustic sensors at the naval research laboratory,” Washington Academy of Sciences, 90(3): 40–57, 2004.
B. H. Lee, Y. H. Kim, K. S. Park, J. B. Eom, M. J. Kim, B. S. Rho, et al., “Interferometric fiber optic sensors,” Sensors, 12: 2467–2486, 2012.
K. O. Hill, Y. Fujii, D. C. Johnson, and B. S. Kawasaki, “Photosensitivity in optical fiber waveguides: application to reflection filter fabrication,” Applied Physics Letters, 32(10): 647–649, 1978.
D. C. Betz, G. Thursby, B. Culshaw, and W. Staszewski, “Acousto-ultrasonic sensing using fiber Bragg gratings,” Smart Materials and Structures, 12(1): 122–128, 2003.
D. C. Betz, G. Thursby, B. Culshaw, and W. Staszewski, “Identification of structural damage using multifunctional Bragg grating sensors: Ⅰ. theory and implementation,” Smart Materials and Structures, 15(5): 1305–1312, 2006.
D. C. Betz, W. Staszewski, G. Thursby, and B. Culshaw, “Structural damage identification using multifunctional Bragg grating sensors: Ⅱ. damage detection results and analysis,” Smart Materials and Structures, 15(5): 1313–1322, 2006.
A. Cusano, A. Cutolo, J. Nasser, M. Giordano, and A. Calabro, “Dynamic strain measurements by fibre Bragg grating sensor,” Sensors and Actuators A: Physical, 110(1–3): 276–281, 2004.
A. Minardo, A. Cusano, R. Bernini, L. Zeni, and M. Giordano, “Response of fiber Bragg gratings to longitudinal ultrasonic waves,” IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 52(2): 304–312, 2005.
J. A. Bucaro, N. Lagakos, B. H. Houston, S. Dey, and M. Zalalutdinov, “Compact directional acoustic sensor using a multi-fiber optical probe,” The Journal of the Acoustical Society America, 133(2): 832–841, 2013.
J. A. Bucaro, N. Lagakos, B. H. Houston, J. Jarzynski, and M. Zalalutdinov, “Miniature, high performance, low cost fiber optic microphone,” The Journal of the Acoustical Society America, 118(3): 1406–1413, 2005.
G. He and F. W. Cuomo, “Displacement response, detection limit, and dynamic range of fiber-optic level sensors,” Journal of Lightwave Technology, 9(11): 1618–1625, 1991.
F. Yang, W. Jin, H. L. Ho, F. Wang, W. Liu, L. Ma, et al., “Enhancement of acoustic sensitivity of hollow-core photonic bandgap fibers,” Optics Express, 21(13): 15514–15521, 2013.
S. E. U. Lima, R. G. Farias, F. M. Araújo, L. A. Ferreira, J. L. Santos, V. Miranda, et al., “Fiber laser sensor based on a phase-shifted chirped grating for acoustic sensing of partial discharges,” Photonic Sensors, 3(1): 44–51, 2013.
A. I. Azmi, D. Sen, W. Sheng, J. Canning, and G. D. Peng, “Performance enhancement of vibration sensing employing multiple phase-shifted fiber Bragg grating,” Journal of Lightwave Technology, 29(22): 3453–3460, 2011.
A. I. Azmi, Raju, and G. D. Peng, “Failure monitoring of e-glass/vinylester composites using fiber grating acoustic sensors,” Photonic Sensors, 3(2): 184–192, 2013.
Z. Qi, H. Huang, T. Cao, P. Liu, Z. Tang, and B. Qu “Highly sensitive fiber pressure sensor based on off-center diaphragm reflection,” Applied Optics, 52(18): 4223–4227, 2013.
W. Suh, M. F. Yanik, O. Solgaard, and S. H. Fan, “Displacement-sensitive photonic crystal structures based on guided resonance in photonic crystal slabs,” Applied Physics Letters, 82(13): 1999–2001, 2003.
Y. Li, X. Wang, and X. Bao, “Sensitive acoustic vibration sensor using single-mode fiber tapers,” Applied Optics, 50(13): 1873–1878, 2011.
R. Chen, G. F. Fernando, T. Butler, and R. A. Badcock, “A novel ultrasound fibre optic sensor based on a fused-tapered optical fibre coupler,” Measurement Science and Technology, 15: 1490–1495, 2004.
M. S. Ferreira, M. Becker, H. Bartelt, P. Mergo, J. L. Santos, and O. Frazão, “A vibration sensor based on a distributed Bragg reflector fibre laser,” Laser Physics Letters, 10(9): 095102, 2013.
M. S. Ferreira, J. L. Santos, P. Mergo, and O. Frazão, “Torsion sensor based on a figure-of-eight cavity fibre laser,” Laser Physics Letters, 10(4): 045105, 2013.