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The Impact of Deflection on the Sensing Response of Fiber Bragg Gratings Bonded to Graphene and PMMA Substrates

Younis Mohammed Salih, Mudhaffer Mustafa Ameen, Fahmi F. Muhammadsharif, Mohammad Fadhli Ahmad, Nor Aieni Haji Mokhtar, Ismael Mohammed Mohammed Saeed, Md Nurul Islam Siddique, Ahmad Nazri Dagang, Salisa Abdul Rahman, Nurul Adilah Abdul Latiff, and Abd Khamim Ismail

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Abstract

The impact of graphene and poly(methyl methacrylate) (PMMA) substrates on the response of a fiber Bragg grating (FBG) due to mechanical deflection was investigated. For this purpose, four FBGs with grating lengths of 5, 15, 25, and 35.9 mm were utilized. Higher sensitivity was found for FBGs of larger grating length and for those bonded to graphene substrate. It was concluded that FBGs of smaller grating length (5 and 15 mm) were more sensitive in compression mode, while those of larger grating length (25 and 35.9 mm) were seen to be highly sensitive in tension mode.

© 2020 Optical Society of Korea

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