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

T. Allsop; A. Ioannou; K. Kalli; R. S. Bhamber; E. Aguera; A. Samson; P. Rigou; C. Saucier; B. Dussardier

doi:10.1117/12.3022049

20 June 2024 Measurements of the chromatic refractive index signature of wine models using a fibre long period gratings

T. Allsop, A. Ioannou, K. Kalli, R. S. Bhamber, E. Aguera, A. Samson, P. Rigou, C. Saucier, B. Dussardier

Author Affiliations +

Proceedings Volume 12999, Optical Sensing and Detection VIII; 1299902 (2024) https://doi.org/10.1117/12.3022049
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

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.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

T. Allsop, A. Ioannou, K. Kalli, R. S. Bhamber, E. Aguera, A. Samson, P. Rigou, C. Saucier, and B. Dussardier "Measurements of the chromatic refractive index signature of wine models using a fibre long period gratings", Proc. SPIE 12999, Optical Sensing and Detection VIII, 1299902 (20 June 2024); https://doi.org/10.1117/12.3022049

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