{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T14:30:56Z","timestamp":1777473056923,"version":"3.51.4"},"reference-count":23,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2016,12,14]],"date-time":"2016-12-14T00:00:00Z","timestamp":1481673600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>A micro-fiber-optic Fabry-Perot interferometer (FPI) is proposed and demonstrated experimentally for ultrasonic imaging of seismic physical models. The device consists of a micro-bubble followed by the end of a single-mode fiber (SMF). The micro-structure is formed by the discharging operation on a short segment of hollow-core fiber (HCF) that is spliced to the SMF. This micro FPI is sensitive to ultrasonic waves (UWs), especially to the high-frequency (up to 10 MHz) UW, thanks to its ultra-thin cavity wall and micro-diameter. A side-band filter technology is employed for the UW interrogation, and then the high signal-to-noise ratio (SNR) UW signal is achieved. Eventually the sensor is used for lateral imaging of the physical model by scanning UW detection and two-dimensional signal reconstruction.<\/jats:p>","DOI":"10.3390\/s16122125","type":"journal-article","created":{"date-parts":[[2016,12,14]],"date-time":"2016-12-14T10:14:47Z","timestamp":1481710487000},"page":"2125","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":27,"title":["High-Frequency Fiber-Optic Ultrasonic Sensor Using Air Micro-Bubble for Imaging of Seismic Physical Models"],"prefix":"10.3390","volume":"16","author":[{"given":"Tingting","family":"Gang","sequence":"first","affiliation":[{"name":"Physics Department, Northwest University, No. 229, Taibai Road (North), Xi\u2019an 710069, China"}]},{"given":"Manli","family":"Hu","sequence":"additional","affiliation":[{"name":"Physics Department, Northwest University, No. 229, Taibai Road (North), Xi\u2019an 710069, China"}]},{"given":"Qiangzhou","family":"Rong","sequence":"additional","affiliation":[{"name":"Physics Department, Northwest University, No. 229, Taibai Road (North), Xi\u2019an 710069, China"}]},{"given":"Xueguang","family":"Qiao","sequence":"additional","affiliation":[{"name":"Physics Department, Northwest University, No. 229, Taibai Road (North), Xi\u2019an 710069, China"}]},{"given":"Lei","family":"Liang","sequence":"additional","affiliation":[{"name":"Physics Department, Northwest University, No. 229, Taibai Road (North), Xi\u2019an 710069, China"}]},{"given":"Nan","family":"Liu","sequence":"additional","affiliation":[{"name":"Physics Department, Northwest University, No. 229, Taibai Road (North), Xi\u2019an 710069, China"}]},{"given":"Rongxin","family":"Tong","sequence":"additional","affiliation":[{"name":"Physics Department, Northwest University, No. 229, Taibai Road (North), Xi\u2019an 710069, China"}]},{"given":"Xiaobo","family":"Liu","sequence":"additional","affiliation":[{"name":"Physics Department, Northwest University, No. 229, Taibai Road (North), Xi\u2019an 710069, China"}]},{"given":"Ce","family":"Bian","sequence":"additional","affiliation":[{"name":"Physics Department, Northwest University, No. 229, Taibai Road (North), Xi\u2019an 710069, China"}]}],"member":"1968","published-online":{"date-parts":[[2016,12,14]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"19573","DOI":"10.1364\/OE.22.019573","article-title":"Ultrasonic imaging of seismic physical models using a phase-shifted fiber Bragg grating","volume":"22","author":"Guo","year":"2014","journal-title":"Opt. 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