Paracetamol concentration-sensing scheme based on a linear cavity fiber laser configuration

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Soares, L (Author) Other; Perez Herrera, RA (Author) Other; Novais, S (Author) Other; A. Ferreira (Author) FEUP; Frazao, O (Author) FCUP; Susana Silva (Author) FCUP

Journal

Title: Optical Fiber Technology

Vol. 80

ISSN: 1068-5200

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 4 Citations

Scopus - 4 Citations

Other information

Authenticus ID: P-00Y-MTQ

DOI: 10.1016/j.yofte.2023.103407

Abstract (EN): A paracetamol concentration-sensing scheme based on a linear cavity fiber laser configuration is demonstrated experimentally. The laser cavity has a fiber sensor at one end, that allows refractive index measurements. The refractometer consists of a cleaved fiber tip combined with an FBG functioning as a reflecting mirror. The combination of a fiber loop mirror at the other end allows to reflect all the light from the FBG and refractometer, forming a linear cavity. By measuring the intensity variation of the Fresnel reflection at the fiber-to-liquid interface, the measured concentration is linear and have a concentration sensitivity of [( - 8.74 & PLUSMN; 0.34) x 10-5 ] & mu;W/(g/kg), over a range of 52.61 to 219.25 g/kg, and with a resolution of 2.77 g/kg. The results obtained present high stability and prove the potential of the fiber laser system to performed realtime measurements of concentration, in a non-invasive way.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5