Abstract

A diaphragm-based interferometric fiber optic sensor that uses a low-coherence light source was designed and tested for on-line detection of the acoustic waves generated by partial discharges inside high-voltage power transformers. The sensor uses a fused-silica diaphragm and a single-mode optical fiber encapsulated in a fused-silica glass tube to form an extrinsic Fabry-Perot interferometer, which is interrogated by low-coherence light. Test results indicate that these fiber optic acoustic sensors are capable of faithfully detecting acoustic signals propagating inside transformer oil with high sensitivity and wide bandwidth.

© 2003 Optical Society of America

High-sensitivity fiber optic Fabry–Perot ultrasonic sensor based on a grooved silicon diaphragm for partial discharge detection

Lina Zhang, Yi Huang, Xiling Niu, Liangjie Wang, Chengyong Hu, Chuanlu Deng, Peng Wu, Yuncai Lu, Qun Li, Yanhua Dong, Qi Zhang, Xiaobei Zhang, and Tingyun Wang
Appl. Opt. 62(25) 6809-6815 (2023)

MEMS-on-fiber ultrasonic sensor with two resonant frequencies for partial discharges detection

Haoyong Li, Jiaming Lv, Delin Li, Chaoyu Xiong, Yihong Zhang, and Yiting Yu
Opt. Express 28(12) 18431-18439 (2020)

Laser-machined fibers as Fabry-Perot pressure sensors

Stuart Watson, Matthew J. Gander, William N. MacPherson, James S. Barton, Julian D. C. Jones, Thomas Klotzbuecher, Torsten Braune, Johannes Ott, and Felix Schmitz
Appl. Opt. 45(22) 5590-5596 (2006)

High-speed, large dynamic range spectral domain interrogation of fiber-optic Fabry–Perot interferometric sensors

Kit Pan Wong, Hyun-Tae Kim, Keshav Rajasekaran, Amirhossein Yazdkhasti, Bala Sai Sudhakar, An Wang, Samuel E. Lee, Kenneth Kiger, James H. Duncan, and Miao Yu
Appl. Opt. 61(16) 4670-4677 (2022)

Diaphragm-based optical fiber sensor array for multipoint acoustic detection

Jingyi Wang, Fan Ai, Qizhen Sun, Tao Liu, Hao Li, Zhijun Yan, and Deming Liu
Opt. Express 26(19) 25293-25304 (2018)