TELKOMNIKA Telecommunication Computing Electronics and Control
An optimum design of high sensitivity PMMA-coated FBG sensor for temperature measurement

TELKOMNIKA Telecommunication Computing Electronics and Control
An optimum design of high sensitivity PMMA-coated FBG sensor for temperature measurement

FBG coating
FEM
Optical sensor
Sensitivity

Fiber Bragg grating (FBG) with silica material has limitations in measuring
mechanical quantities such as strain and temperature, this happens because
silica fibers are easy to break at higher transverse or axial strains. This
deficiency can be overcome in several ways, one of which is by coating the
silica FBG with a coating material made of metal or polymer. In this
research, the FBG sensor has been designed by poly methyl methacrylate
(PMMA)-coated FBG and silica. The finite element method (FEM) is used
to analyze the electric field distribution on the surface of PMMA coated
FBG with a coating thickness of 20 μm. Furthermore, the sensitivity of each
coated FBG as a temperature sensor was measured in the range of 25 °C to
85 °C using coupled mode theory (CMT). From the design and analysis of
coated FBG, it was found that FBG coated with PMMA material had the
highest sensitivity of 395.73pm/°C. However, the FBG sensor coated with
silica material has a sensitivity of 13.73 pm/°C. the shift obtained is also
linear along with the temperature of 25 °C to 85 °C.

Dedi Irawan, Khaikal Ramadhan, Toto Saktioto, Azwir Marwin

http://telkomnika.uad.ac.id

Oct 26, 2022

peri irawan

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