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Title: Two-dimensional vector accelerometer based on Bragg gratings inscribed in a multi-core fiber
Authors: Cui, JX 
Liu, ZY 
Gunawardena, DS 
Zhao, ZY 
Tam, HY 
Issue Date: 2019
Source: Optics express, 22 July 2019, v. 27, no. 15, p. 20848-20856
Abstract: We propose and demonstrate a novel orientation-sensitive two-dimensional accelerometer based on fiber Bragg gratings inscribed in a multi-core fiber. Through monitoring of the wavelength shifts of three of the seven cores, including the central core and two outer cores which are not aligned in a straight line, information on vibration orientation as well as acceleration can be obtained simultaneously. Performance of the proposed accelerometer in terms of frequency, acceleration and vibration orientation are experimentally investigated. The designed two-dimensional accelerometer is capable of obtaining all these three parameters simultaneously. A sensitivity which is strongly dependent on the orientation is achieved, with a best orientation accuracy of 0.127 degrees over a range of 0-180 degrees. Moreover, the resonance frequency and the sensitivity can be optimized through adjusting the length and weight of the free-fiber. The ease of fabrication as well as the versatility of the proposed sensor makes it potentially useful in dynamic monitoring for industrial applications.
Publisher: Optical Society of America
Journal: Optics express 
EISSN: 1094-4087
DOI: 10.1364/OE.27.020848
Rights: © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement (
© 2019 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.
Journal © 2019
The following publication J. Cui, Z. Liu, D. Gunawardena, Z. Zhao, and H. Tam, "Two-dimensional vector accelerometer based on Bragg gratings inscribed in a multi-core fiber," Opt. Express 27, 20848-20856 (2019) is available at
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