Measurement of curvature and displacement on in-line Mach-Zehnder interferometer sensor based on a special single-mode fiber

L. Arévalo Bautista; J. Sierra Hernández; E. Gallegos Arellano; M. Rico Méndez; R. Selvas Aguilar; M. García Méndez

doi:10.1117/12.2684099

4 October 2023 Measurement of curvature and displacement on in-line Mach-Zehnder interferometer sensor based on a special single-mode fiber

L. Arévalo Bautista, J. Sierra Hernández, E. Gallegos Arellano, M. Rico Méndez, R. Selvas Aguilar, M. García Méndez

Author Affiliations +

Proceedings Volume 12684, ODS 2023: Industrial Optical Devices and Systems; 126840F (2023) https://doi.org/10.1117/12.2684099
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

In-line fiber Mach-Zehnder interferometers have become more popular than traditional electric sensors because of their small size, low cost, easy fabrication, resistance to electromagnetic interference, durability against extreme environments, and ease of use. This paper discusses the development, characteristics, and properties of a curvature-based Mach-Zehnder interferometer (MZI). The MZI comprises a filter made by splicing core-offset sections of a special mode fiber (SSMF) with a cladding diameter of 70 μm in an SMF-SSMF-SMF-SSMF-SMF (1m/25mm/30mm/25mm/1m) configuration. The SSMF splices act as the arms of the MZI, while the mismatch diameter sections serve as optical fiber couplers. The MZI was characterized by measuring the optical spectrum response when a broadband source of 1537.5 to 1600 nm was launched with a power of 10 dBm to transmit light through the arrangement. The optical spectrum analyzer (OSA) detects the transmitted light and analyzes its optical transmission characteristics, showing 5 notches of modal interferences into the longitude region. As a result of the experimental arrangement, the displacement and curvature sensitivities are 0.003 nm/μm and 0.509 nm/μm^-1, respectively. The proposed sensor has potential advantages for measuring refractive index, pH, torsion, curvature, and temperature.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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L. Arévalo Bautista, J. Sierra Hernández, E. Gallegos Arellano, M. Rico Méndez, R. Selvas Aguilar, and M. García Méndez "Measurement of curvature and displacement on in-line Mach-Zehnder interferometer sensor based on a special single-mode fiber", Proc. SPIE 12684, ODS 2023: Industrial Optical Devices and Systems, 126840F (4 October 2023); https://doi.org/10.1117/12.2684099

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