Open AccessUltrasonic imaging of seismic physical models using a phase-shifted fiber Bragg grating
Author(s) -
Jingjing Guo,
Shuangshuang Xue,
Qun Zhao,
Changxi Yang
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.019573
Subject(s) - fiber bragg grating , optics , ultrasonic sensor , materials science , reflection (computer programming) , wavelength , phase (matter) , transducer , piezoelectricity , acoustics , optoelectronics , physics , computer science , quantum mechanics , composite material , programming language
We report what is to our knowledge the first ultrasonic imaging of seismic physical models by using a phase-shifted fiber Bragg grating (PS-FBG). Seismic models, which consist of multiple layer structures, were immersed in water. Piezoelectric (PZT) transducer was used to generate ultrasonic waves and a PS-FBG as a receiver. Two-dimensional (2D) ultrasonic images were reconstructed by scanning the PS-FBG with a high-precision position scanning device. In order to suppress the low-frequency drift of the Bragg wavelength during scanning, a tight wavelength tracking method was employed to lock the laser to the PS-FBG resonance in its reflection bandgap. The ultrasonic images captured by the PS-FBG have been compared with the images obtained by the geophysical imaging system, Sinopec, demonstrating the feasibility of our PS-FBG based imaging system in seismic modeling studies.