Design and numerical analysis of a highly sensitive ultrasonic acoustic sensor based on π-phase-shifted fiber Bragg grating and fiber Mach-Zehnder interferometer interrogation

• Autorzy: Dwivedi Krishna Mohan , Trivedi Gaurav , Khijwania Sunil K. , Osuch Tomasz

Identyfikatory

DOI

10.24425/mms.2020.132775

• Języki publikacji: EN

Abstrakty

EN

A π-phase-shifted fiber Bragg grating (π-FBG) shows high sensitivity to the ultrasonic (US) wave as compared to the conventional FBG due to the strong slow-light phenomenon at the resonance peak. However, its sensitivity is limited by the interrogation schemes. A combination of π-FBG and unbalanced fiber Mach-Zehnder interferometer (F-MZI) are theoretically analyzed and optimized for the highly sensitive acoustic sensor. The coupled-mode theory (CMT) and transfer matrix method (TMM) are used to establish the numerical modelling of π-FBG. For the optimized grating parameters of π-FBG, the proposed sensing system shows the high strain sensitivity of 1.2x10⁸/ε, the highest dynamic strain resolution of 4.1fε/√Hz, and the highest wavelength shift resolution of 4.9x10^-9 pm. Further, the proposed sensing system strongly supports both time and wavelength division multiplexing techniques. Therefore, the proposed sensing system shows extreme importance in single as well as quasi-distributed US acoustic wave sensing networks.

Słowa kluczowe

EN

π-FBG; unbalanced F-MZI; strain sensitivity; ultrasonic acoustic sensor

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2020
• Tom: Vol. 27, nr 2
• Strony: 289--300
• Opis fizyczny: Bibliogr. 31 poz., rys., wykr., wzory

Twórcy

autor

Dwivedi Krishna Mohan

• Indian Institute of Technology Guwahati, Department of Electronics and Electrical Engineering, Guwahati, India

autor

Trivedi Gaurav

• Indian Institute of Technology Guwahati, Department of Electronics and Electrical Engineering, Guwahati, India

autor

Khijwania Sunil K.

• Indian Institute of Technology Guwahati, Department of Physics, Guwahati, India

autor

Osuch Tomasz

• Warsaw University of Technology, Faculty of Electronics and Information Technology, Institute of Electronic Systems, Nowowiejska 15/19, 00-665 Warsaw, Poland
• National Institute of Telecommunications, Szachowa 1, 04-894 Warsaw, Poland

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).