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High sensitivity strain sensor based on twin hollow microspheres
Author(s) -
Monteiro Catarina S.,
Kobelke Jens,
Schuster Kay,
Bierlich Jörg,
Silva Susana O.,
Frazão Orlando
Publication year - 2019
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31557
Subject(s) - fabrication , interferometry , materials science , sensitivity (control systems) , fusion splicing , strain (injury) , microsphere , core (optical fiber) , optics , electronic engineering , composite material , physics , engineering , fiber , medicine , alternative medicine , pathology , chemical engineering
A sensor based on 2 hollow core microspheres is proposed. Each microsphere was produced separately through fusion splicing and then joined. The resultant structure is a Fabry‐Perot interferometer with multiple interferences that can be approximated to a 4‐wave interferometer. Strain characterization was attained for a maximum of 1350 με, achieving a linear response with a sensitivity of 3.39 ± 0.04 pm /με. The fabrication technique, fast and with no chemical hazards, as opposed to other fabrication techniques, makes the proposed sensor a compelling solution for strain measurements in hash environments.