Communication Dans Un Congrès Année : 2024

Measurements of the chromatic refractive index signature of wine models using a fibre long period gratings

Résumé

A novel optical fibre device is proposed for real-time measurements of near infrared chromatic refractive index signature of a liquid medium in the 1100-1700 nm range. This inline optical fibre chromatic refractive index analyser is based upon collocated fibre long period gratings written adjacently in the core by femtosecond laser inscription yielding 8 attenuation bands associated with different cladding modes, yielding 8 independent measurements across the entire wavelength range. This fibre device is tested on a series of chemical compounds associated with wines. The results for each compound yielded distinctive chromatic responses. The limits of detection for this fibre devices ranged from 1×10 -3 to 6×10 -5 mol/L for the compounds associated with wines. This demonstrates a potential usefulness of such an optical fibre sensor capable of monitoring in real-time effective chromatic refractive index signatures that is not offered by any current technology.

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hal-04792939 , version 1 (26-11-2024)

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T. Allsop, A. Ioannou, K. Kalli, R. S. Bhamber, Evelyne Aguera, et al.. Measurements of the chromatic refractive index signature of wine models using a fibre long period gratings. Optical Sensing and Detection VIII - SPIE Photonics Europe 2024, Apr 2024, Strasbourg, France. pp.1299902, ⟨10.1117/12.3022049⟩. ⟨hal-04792939⟩
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