Highly sensitive curvature sensors based on polarization-maintaining photonic crystal fibers

CHEN Dafeng; LU Ping; LIU Deming

doi:10.7510/jgjs.issn.1001-3806.2015.04.004

LASER TECHNOLOGY > 2015 > 39(4): 450-452. > DOI: 10.7510/jgjs.issn.1001-3806.2015.04.004

CHEN Dafeng, LU Ping, LIU Deming. Highly sensitive curvature sensors based on polarization-maintaining photonic crystal fibers[J]. LASER TECHNOLOGY, 2015, 39(4): 450-452. DOI: 10.7510/jgjs.issn.1001-3806.2015.04.004

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Highly sensitive curvature sensors based on polarization-maintaining photonic crystal fibers

National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China

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Received Date: July 15, 2014
Revised Date: September 14, 2014
Published Date: July 24, 2015

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Abstract

Abstract

For high accuracy of curvature measurement, a curvature sensor with polarization-maintaining photonic crystal fiber (PM-PCF) was proposed based on Mach-Zehnder interferometer structure. The fiber structure of the sensor head was formed by single-mode, up-taper, PM-PCF, multimode and single-mode fibers. Dislocation fusion was done between multimode and single mode fibers. After theoretical analysis and experiment verification, the linear relationship between resonance wavelength shift and curvature change in the curvature range of 0.04582m-1~0.054776m-1 and 0.054776m-1~0.06929m-1 was proved. The results show that the curvature sensor can be implied in health monitoring when the sensitivities of the sensor are 93.95nm/m-1 and 30.89nm/m-1.
- sensor technique,
- curvature sensor,
- Mach-Zehnder interferometer,
- polarization-maintaining photonic crystal fiber

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