scholarly journals Overview of Fiber Optic Sensor Technologies for Strain/Temperature Sensing Applications in Composite Materials

Sensors ◽  
2016 ◽  
Vol 16 (1) ◽  
pp. 99 ◽  
Author(s):  
Manjusha Ramakrishnan ◽  
Ginu Rajan ◽  
Yuliya Semenova ◽  
Gerald Farrell
Keyword(s):  
Composite Materials ◽  
Fiber Optic ◽  
Temperature Sensing ◽  
Fiber Optic Sensor ◽  
Sensing Applications ◽  
Optic Sensor

scholarly journals Sensitivity Enhancement of Curvature Fiber Sensor Based on Polymer-Coated Capillary Hollow-Core Fiber

Sensors ◽  
2020 ◽  
Vol 20 (13) ◽  
pp. 3763 ◽  
Author(s):  
Luis A. Herrera-Piad ◽  
Iván Hernández-Romano ◽  
Daniel A. May-Arrioja ◽  
Vladimir P. Minkovich ◽  
Miguel Torres-Cisneros
Keyword(s):  
Fiber Optic ◽  
High Sensitivity ◽  
Single Mode ◽  
Cost Effective ◽  
Fiber Optic Sensor ◽  
Hollow Core ◽  
Sensing Applications ◽  
Optic Sensor ◽  
Wide Range ◽  
Core Fiber

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.

Hybrid Fiber Optic Sensor System for Measuring the Strain, Temperature, and Thermal Strain of Composite Materials

2014 ◽  
Vol 14 (8) ◽  
pp. 2571-2578 ◽  
Author(s):  
Manjusha Ramakrishnan ◽  
Ginu Rajan ◽  
Yuliya Semenova ◽  
Gerald Farrell
Keyword(s):  
Composite Materials ◽  
Fiber Optic ◽  
Thermal Strain ◽  
Fiber Optic Sensor ◽  
Sensor System ◽  
Hybrid Fiber ◽  
Optic Sensor

Multifunctional fiber optic sensor for manufacturing of thermoset matrix composite materials

1997 ◽  
Author(s):  
Russell G. May ◽  
Kevin A. Shinpaugh ◽  
Paul G. Duncan ◽  
Alfred C. Loos ◽  
Richard O. Claus
Keyword(s):  
Composite Materials ◽  
Matrix Composite ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Optic Sensor

scholarly journals Mn4+-Doped Magnesium Titanate—A Promising Phosphor for Self-Referenced Optical Temperature Sensing

2018 ◽  
Author(s):  
Francesca Venturini ◽  
Michael Baumgartner ◽  
Sergey M. Borisov
Keyword(s):  
Time Domain ◽  
Fiber Optic ◽  
Luminescence Decay ◽  
Temperature Sensing ◽  
Fiber Optic Sensor ◽  
Temperature Dependent ◽  
Resistance Thermometer ◽  
Magnesium Titanate ◽  
Optic Sensor ◽  
Fiber Optic Temperature

Phosphors based on magnesium titanate activated with Mn4+ ions are of great interest because, when excited with blue light, they display a strong red-emitting luminescence. They are characterized by a luminescence decay which is strongly temperature dependent in the range from 0 to 80 °C, making these materials very promising for temperature sensing in the biochemical field. In this work the optical and thermal properties of the luminescence of Mg2TiO4 are investigated for different Mn4+ doping concentrations. The potential of this material for temperature sensing is demonstrated by fabricating a fiber optic temperature microsensor and by comparing its performance against a standard resistance thermometer. The response of the fiber optic sensor is exceptionally fast, enabling monitoring of temperature fluctuation in subsecond time domain.

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