Semi-distributed interferometers fiber-optic sensors for high-sensitivity refractive index detection: Design and sensitivity analysis
Kazhiyev S. Abdossova A. Moldabay D. Rakhimbekova A. Blanc W. Tosi D.
October 2023Elsevier B.V.
Measurement: Journal of the International Measurement Confederation
2023#220
In this work, we present the design and analysis of fiber-optic refractive index (RI) sensors based on a simple semi-distributed interferometer (SDI). The SDI is a cavity formed between a cleaved fiber tip and the reflective interface between a single-mode fiber and a high-scattering fiber with core doped by Mg-silicate nanoparticles. The fabrication is rapid (∼1 min) and straightforward, as only a splice and cleave of the fibers are required; the resulting spectral fingerprint is an interferometer-shaped envelope, with a stochastic distribution due to the random scattering centers of the in-cavity fiber. We fabricated 18 sensors with 6 different enhanced-scattering fibers, having different drawing temperature and speed; by analyzing the RI sensitivity of each unit, we obtain sensitivity values up to 787.0 dB/RIU (refractive index units), whereas the optimal fiber allows achieving average sensitivity of 457.9 dB/RIU.
Fabry-Perot interferometer , High-scattering fibers , High-sensitivity refractive index sensing , Interferometry , Optical fiber sensors , Refractive index sensors , Refractometers
Text of the article Перейти на текст статьи
Nazarbayev University, School of Engineering and Digital Sciences, Astana, Kazakhstan
Université Côte dAzur, INPHYNI, CNRS UMR7010, 17 rue Julien Lauprêtre, Nice, 06200, France
National Laboratory Astana, Laboratory of Biosensors and Bioinstruments, Astana, Kazakhstan
Nazarbayev University
Université Côte dAzur
National Laboratory Astana
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026