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Interferometric Fiber Optic Sensors
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Sensors 2012, 12(3), 3314-3326; doi:10.3390/s120303314

Dynamic Strain Measured by Mach-Zehnder Interferometric Optical Fiber Sensors

Department of Mechanical Engineering, Yuan Ze University, 135 Yuan-Tung Road, Chung-Li 320, Taiwan
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Received: 11 January 2012 / Revised: 23 February 2012 / Accepted: 23 February 2012 / Published: 8 March 2012
(This article belongs to the Special Issue Optical Fiber Sensors 2012)
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Abstract

Optical fibers possess many advantages such as small size, light weight and immunity to electro-magnetic interference that meet the sensing requirements to a large extent. In this investigation, a Mach-Zehnder interferometric optical fiber sensor is used to measure the dynamic strain of a vibrating cantilever beam. A 3 × 3 coupler is employed to demodulate the phase shift of the Mach-Zehnder interferometer. The dynamic strain of a cantilever beam subjected to base excitation is determined by the optical fiber sensor. The experimental results are validated with the strain gauge.
Keywords: optical fiber sensor; Mach-Zehnder interferometer; dynamic strain; 3 × 3 coupler optical fiber sensor; Mach-Zehnder interferometer; dynamic strain; 3 × 3 coupler
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Her, S.-C.; Yang, C.-M. Dynamic Strain Measured by Mach-Zehnder Interferometric Optical Fiber Sensors. Sensors 2012, 12, 3314-3326.

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