A temperature sensor based on all-fiber mach-zender interferometer with indium fluoride glass

Francesco Anelli; Andrea Annunziato; Antonella Maria Loconsole; Vito Vincenzo Francione; Solenn Cozic; Samuel Poulain; Francesco Prudenzano

doi:10.1117/12.3017496

20 June 2024 A temperature sensor based on all-fiber mach-zender interferometer with indium fluoride glass

Francesco Anelli, Andrea Annunziato, Antonella Maria Loconsole, Vito Vincenzo Francione, Solenn Cozic, Samuel Poulain, Francesco Prudenzano

Author Affiliations +

Proceedings Volume 13003, Fiber Lasers and Glass Photonics: Materials through Applications IV; 130030N (2024) https://doi.org/10.1117/12.3017496
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

A high sensitivity temperature sensor exploiting indium fluoride optical fibers is designed and characterized. It is based on a non-adiabatic tapered optical fiber, acting as a Mach-Zender interferometer. The sensitivity of the sensor is predicted via mode analysis, performed with Finite Element Method, and then computing the phase delay between the LP01 mode and the LP02 mode. By considering the effect of the thermal expansion and of the thermo-optical properties of the glass, respectively on the waist length and on the core and the cladding refractive indices, the sensing mechanism is explained. The non-adiabatic tapered optical fiber (Le Verre Fluoré IFG SM [2.95] 7.5/125) sensor is fabricated with Vytran GPX-2400 glass processing system, addressing the difficulties of indium fluoride glass, including its inclination to crystallize, its limited temperature range for fabrication, and its low glass transition temperature. The sensor is characterized in the mid-infrared spectral range with an interband cascade laser, emitting at the wavelength λ = 3.34 µm.

Conference Presentation

Citation Download Citation

Francesco Anelli, Andrea Annunziato, Antonella Maria Loconsole, Vito Vincenzo Francione, Solenn Cozic, Samuel Poulain, and Francesco Prudenzano "A temperature sensor based on all-fiber mach-zender interferometer with indium fluoride glass", Proc. SPIE 13003, Fiber Lasers and Glass Photonics: Materials through Applications IV, 130030N (20 June 2024); https://doi.org/10.1117/12.3017496

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