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Sensitivity Enhancement of Curvature Fiber Sensor Based on Polymer-Coated Capillary Hollow-Core Fiber
- Source :
- Sensors, Vol 20, Iss 3763, p 3763 (2020), Sensors (Basel, Switzerland)
- Publication Year :
- 2020
- Publisher :
- MDPI AG, 2020.
-
Abstract
- In this paper, we propose and experimentally demonstrate a simple technique to enhance the curvature sensitivity of a bending fiber optic sensor based on anti-resonant reflecting optical waveguide (ARROW) guidance. The sensing structure is assembled by splicing a segment of capillary hollow-core fiber (CHCF) between two single-mode fibers (SMF), and the device is set on a steel sheet for measuring different curvatures. Without any surface treatment, the ARROW sensor exhibits a curvature sensitivity of 1.6 dB/m−1 in a curvature range from 0 to 2.14 m−1. By carefully coating half of the CHCF length with polydimethylsiloxane (PDMS), the curvature sensitivity of the ARROW sensor is enhanced to −5.62 dB/m−1, as well as an increment in the curvature range (from 0 to 2.68 m−1). Moreover, the covered device exhibits a low-temperature sensitivity (0.038 dB/°C), meaning that temperature fluctuations do not compromise the bending fiber optic sensor operation. The ARROW sensor fabricated with this technique has high sensitivity and a wide range for curvature measurements, with the advantage that the technique is cost-effective and easy to implement. All these features make this technique appealing for real sensing applications, such as structural health monitoring.
- Subjects :
- Letter
Materials science
Capillary action
Physics::Optics
curvature sensing
02 engineering and technology
Bending
engineering.material
lcsh:Chemical technology
Curvature
01 natural sciences
Biochemistry
Analytical Chemistry
010309 optics
chemistry.chemical_compound
020210 optoelectronics & photonics
Coating
0103 physical sciences
0202 electrical engineering, electronic engineering, information engineering
lcsh:TP1-1185
Fiber
Electrical and Electronic Engineering
Instrumentation
Polydimethylsiloxane
business.industry
Atomic and Molecular Physics, and Optics
chemistry
Fiber optic sensor
engineering
PDMS covering
Optoelectronics
business
ARROW guidance
capillary hollow-core fiber
Sensitivity (electronics)
Subjects
Details
- ISSN :
- 14248220
- Volume :
- 20
- Database :
- OpenAIRE
- Journal :
- Sensors
- Accession number :
- edsair.doi.dedup.....fe4a2fe269e9224693c22754932e112b
- Full Text :
- https://doi.org/10.3390/s20133763