Analysis of π-Phase-Shifted Fiber Bragg Gratings for Ultrasonic Detection

被引：101

作者：

Liu, Tongqing ^{[1
]}

Han, Ming ^{[1
]}

机构：

[1] Univ Nebraska, Lincoln, NE 68588 USA

来源：

IEEE SENSORS JOURNAL | 2012年 / 12卷 / 07期

关键词：

Fiber Bragg grating (FBG); fiber-optic sensors; pressure wave; ultrasonic detection; SENSOR; WAVES;

D O I：

10.1109/JSEN.2012.2189383

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Using numerical simulations, we investigated the responses of the pi-phase-shifted fiber Bragg gratings (pi FBGs) impinged by pressure ultrasonic waves. The effect of the grating length, grating refractive index modification depth, and ultrasonic frequency on the wavelength sensitivity and intensity sensitivity of the pi FBG ultrasonic sensor for ultrasonic waves of different wavelengths was analyzed. The directivity of a pi FBG sensor was also studied. Our analysis revealed several unique pi FBG response characteristics and will be useful in the design and optimization of fiber-optic ultrasonic sensors that use a pi FBG as the sensing element.

引用

收藏

页码：2368 / 2373

页数：6

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