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Sensors 2018, 18(5), 1549; https://doi.org/10.3390/s18051549

A Novel Strain Sensor with Large Measurement Range Based on All Fiber Mach-Zehnder Interferometer

State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, 932 South Lushan Street, Changsha 410083, China
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Received: 17 April 2018 / Revised: 8 May 2018 / Accepted: 9 May 2018 / Published: 14 May 2018
(This article belongs to the Special Issue Integrated Sensors)
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Abstract

We have proposed a high sensitive photonic crystal fiber (PCF) strain sensor based on the Mach-Zehnder interferometer (MZI). The sensing head is formed by all-fiber in-line single mode-multimode-photonic-crystal-single mode fiber (SMPS) structure, using only the splicing method. Such a strain sensor exhibited a high sensitivity of −2.21 pm/με within a large measurement range of up to 5000 με and a large fringe visibility of up to 24 dB. Moreover, it was found that the strain sensitivity was weekly dependent of the length of PCF or MMF. In addition, the sensor exhibited the advantages of simplicity of fabrication, high sensitivity and larger fringe visibility. View Full-Text
Keywords: strain sensor; photonic crystal fiber; multimode fiber; Mach-Zehnder interferometer strain sensor; photonic crystal fiber; multimode fiber; Mach-Zehnder interferometer
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Dong, X.; Du, H.; Sun, X.; Luo, Z.; Duan, J. A Novel Strain Sensor with Large Measurement Range Based on All Fiber Mach-Zehnder Interferometer. Sensors 2018, 18, 1549.

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