An optimum design of high sensitivity PMMA-coated FBG sensor for temperature measurement

In many advanced applications where size, remote measurement, the accuracy factor, and the large shift of the Bragg wavelength are critical, optical fiber-based sensing techniques can provide revolutionary solutions that will give rise to advanced technologies utilizing the photon phenomenon. [...]f...

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Bibliographic Details
Published in:Telkomnika 2023-04, Vol.21 (2), p.382-389
Main Authors: Irawan, Dedi, Ramadhan, Khaikal, Saktioto, Toto, Marwin, Azwir
Format: Article
Language:English
Subjects:
Coating
Coupled modes
Cryogenic temperature
Electric fields
Fiber optics
Finite element analysis
Finite element method
Low temperature
Optical fibers
Polymer coatings
Polymers
Polymethyl methacrylate
Protective coatings
Remote sensors
Sensitivity
Sensors
Temperature
Temperature measurement
Temperature sensors
Thermal expansion
Titanium nitride
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Summary:In many advanced applications where size, remote measurement, the accuracy factor, and the large shift of the Bragg wavelength are critical, optical fiber-based sensing techniques can provide revolutionary solutions that will give rise to advanced technologies utilizing the photon phenomenon. [...]fiber optic sensing technology is being developed as a future technology that is currently implemented in various applications. In a previous study, it was also reported that FBG coating with TiN metal as a sensor at cryogenic temperatures obtained a sensitivity of 10,713 pm/C and it was found that TiN coating on FBG can change the non-linear characteristics of the thermo-optical expansion coefficient, in this study other FBG coated with metal material [19], and also use poly methil methacrylate (PMMA) coated FBG in low-temperature measurement [20]-[22] In this paper, we use coupled mode theory (CMT) and finite element method (FEM) to investigate the performance of FBG coating based on the increased sensitivity of the FBG temperature sensor in the range of 25-85 °C PMMA coating materials, investigating the Bragg wavelength shift for every 10 °C different temperature to the Bragg wavelength. [...]the normal temperature sensitivity of an FBG is: [...]the sensitivity of the uncoated FBG sensor depends on the thermo-optic coefficient, whereas for polymer-coated FBG, the temperature changes can cause variations in the grating period due to thermal expansion and strain effects experienced by the fiber. [...]the influence of strain is inseparable from FBG sensors and one thing that is not separated.
ISSN:1693-6930
2302-9293
DOI:10.12928/telkomnika.v21i2.22746