[1] [1] S. E. U. Lima, O. Frazao, 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, vol. 25, no 4, pp. 2526-2534, 2010.

[2] [2] V. Miranda and A. R. G. Castro, “Improving the IEC table for transformer failure diagnosis with knowledge extraction from neural networks,” IEEE Transactions on Power Delivery, vol. 20, no. 4, pp. 2509-2516, 2005.

[3] [3] T. Bengtsson, H. Kols, and B. Jonsson, “Transformer PD diagnosis using acoustic emission technique,” presented at 10th Int. Symp. on High Voltage Engineering, Montreal, Canada, Aug. 25-29, 1997.

[4] [4] J. M. Lopez-Higuera, Handbook of Optical Fiber Sensing Technology. New York: John Wiley & Sons Inc., 2002.

[5] [5] A. D. Kersey, “A review of recent developments in fiber optic sensor technology,” Optical Fiber Technology, vol. 2, no. 3, pp. 291-317, 1996.

[6] [6] K. P. Koo and A. D. Kersey, “Bragg grating-based laser sensors systems with interferometric interrogation and wavelength division multiplexing,” Journal of Lightwave Technology, vol.13, no. 7, pp. 1243-1249, 1995.

[7] [7] P. E. Bagnoli, N. Beverini, R. Falciai, E. Maccioni, M. Morganti, F. Sorrentino, et al., “Development of an erbium-doped fiber laser as a deep-sea hydrophone,” Journal of Optics A: Pure and Applied Optics, vol. 8, no. 7, pp. 535-539, 2006.

[8] [8] P. E. Bagnoli, N. Beverini, B. Bouhadef, E. Castorina, E. Falchini, R. Falciai, et al, “Erbium-doped fiber lasers as deep-sea hydrophones,” Nuclear Instruments Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors, Associated, Equipment, vol. 567, no. 2, pp. 515-517, 2006.

[9] [9] G. A. Ball and W. H. Glenn, “Design of a single-mode linear-cavity erbium fiber laser utilizing Bragg reflectors,” Journal of Lightwave Technology, vol. 10, no. 10, pp. 1338-1343, 1992.

[10] [10] A. D. Kersey, T. A. Berkoff, and W. W. Morey, “High-resolution fiber-grating based strain sensor with interferometric wavelength-shift detection,” Electronics Letters, vol. 28, no. 3, pp. 236-238, 1992.

[11] [11] Y. W. Song, S. A. Havstad, D. Starodubov, Y. Xie, A. E. Willner, and J. Feinberg, “40-nm-wide tunable fiber ring laser with single-mode operation using a highly stretchable FBG,” IEEE Photonics Technology Letters, vol. 13, no. 11, pp. 1167-1169, 2001.

[12] [12] S. H. Chang, I. K. Hwang, B. Y. Kim, and H. G. Park, “Widely tunable single-frequency Er-doped fiber laser with long linear cavity,” IEEE Photonics Technology Letters, vol. 13, no. 4, pp. 287-289, 2001.

[13] [13] X. Dong, N. Q. Ngo, P. Shum, H. Y. Tam, and X. Dong, “Linear cavity erbium-doped fiber laser with over 100 nm tuning range,” Optics Express, vol. 11, no.14, pp. 1689-1694, 2003.

[14] [14] D. Sabourdy, V. Kermene, A. Desfarges-Berthelemot, L. Lefort, A. Barthelemy, P. Even, et al., “Efficient coherent combining of widely tunable fiber lasers,” Optics Express, vol. 11, no. 2, pp. 87-97, 2003.

[15] [15] H. L. Liu, H. Y. Tam, W. H. Chung, P. K. A. Wai, and N. Sugimoto, “Low beat-noise polarized tunable fiber ring laser,” IEEE Photonics Technology Letters, vol. 18, no. 5, pp. 706-708, 2006.

[16] [16] S. Y. Li, N. Q. Ngo, and Z. R. Zhang, “Tunable fiber laser with ultra-narrow linewidth using a tunable phase-shifted chirped fiber grating,” IEEE Photonics Technology Letters, vol. 20, no. 17, pp. 1482-1484, 2008.

[17] [17] T. Bengtsson, M. Leijon, and L. Ming, “Acoustic frequencies emitted by partial discharges in oil,” presented at 8th Int. Symp. on High Voltage Engineering, Yokohama, Japan, Aug. 22-27, 1993.

[18] [18] T. Krauthammer and E. Ventsel, Thin plates and shells: theory, analysis and applications, 1st ed. New York: Mercel Dekker Inc., 2001.

[19] [19] W. Soedel, Vibrations of Shells and Plates, 3rd ed. New York: Mercel Dekker Inc., 2004.

[20] [20] M. Anghinolfi, A. Calvi, A. Cotrufo, M. Ivaldi, O. Yershova, F. Parodi, et al., “A fiber optic air backed mandrel hydrophone to detect high energy hadronic showers in the Water,” presented at Workshop of the Russian-Italian collaboration in the Cosmic Ray Physics, Moscow, Oct. 17, pp. 1-9, 2005.