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Sensitivity Distribution Properties of a Phase-Shifted Fiber Bragg Grating Sensor to Ultrasonic Waves
Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan
* Author to whom correspondence should be addressed.
Received: 25 November 2013; in revised form: 2 January 2014 / Accepted: 7 January 2014 / Published: 9 January 2014
Abstract: In this research, the sensitivity distribution properties of a phase-shifted fiber Bragg grating (PS-FBG) to ultrasonic waves were investigated employing the surface attachment method. A careful consideration was taken and examined by experimental results to explain that the distances and angles between the sensor and ultrasonic source influence not only the amplitudes, but also the initial phases, waveforms, and spectra of detected signals. Furthermore, factors, including the attachment method and the material’s geometric dimensions, were also discussed. Although these results were obtained based on PS-FBG, they are also applicable to a normal FBG sensor or even an optical fiber sensor, due to the identical physical changes induced by ultrasonic waves in all three. Thus, these results are useful for applications of optical fiber sensors in non-destructive testing and structural health monitoring.
Keywords: optical fiber sensor; phase-shifted fiber Bragg grating; ultrasonic detection
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Cite This Article
MDPI and ACS Style
Wu, Q.; Okabe, Y.; Saito, K.; Yu, F. Sensitivity Distribution Properties of a Phase-Shifted Fiber Bragg Grating Sensor to Ultrasonic Waves. Sensors 2014, 14, 1094-1105.
Wu Q, Okabe Y, Saito K, Yu F. Sensitivity Distribution Properties of a Phase-Shifted Fiber Bragg Grating Sensor to Ultrasonic Waves. Sensors. 2014; 14(1):1094-1105.
Wu, Qi; Okabe, Yoji; Saito, Kazuya; Yu, Fengming. 2014. "Sensitivity Distribution Properties of a Phase-Shifted Fiber Bragg Grating Sensor to Ultrasonic Waves." Sensors 14, no. 1: 1094-1105.