Optical fiber probes for fluorescence based oxygen sensing

• Type: Article in International Scientific Journal
• Date: 2004

Authors

Jorge, PAS (Author) Other; Caldas, P (Author) Other; Rosa, CC (Author) FCUP; Oliva, AG (Author) Other; Santos, JL (Author) FCUP

Journal

Title: Sensors and Actuators, B: Chemical

Vol. 103

Pages: 290-299

ISSN: 0925-4005

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 82 Citations

Scopus - 90 Citations

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: P-000-8FX

DOI: 10.1016/j.snb.2004.04.086

Abstract (EN): An optical fiber sensing system, for monitoring oxygen aiming in vivo nuclear magnetic resonance (NMR) applications is presented. Oxygen detection is based on the dynamic quenching of the fluorescence of a ruthenium complex trapped in the porous structure of a sol-gel silica film. Oxygen concentration is determined by phase-modulation fluorometry. Preliminary results concerning the characterization of doped sol-gel thin films deposited by dip coating in glass slides and in optical fiber probes are presented. Four different probe configurations are tested and compared. Best results are obtained with a fiber taper configuration which shows reproducibility and best excitation efficiency. This structure is fully characterized and some considerations regarding optimal fiber optical sensing probes for 02 detection are addressed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10