Optical temperature measurement configuration for fluorescence based oxygen sensors

• Type: Article in International Conference Proceedings Book
• Date: 2004

Authors

Jorge, PAS (Author) Other; Caldas, P (Author) Other; Carla C Rosa (Author) FCUP; Oliva, AG (Author) Other; Marques, MB (Author) Other; Jose L Santos (Author) Other

Conference proceedings International

Title: SECOND EUROPEAN WORKSHOP ON OPTICAL FIBRE SENSORS: PROCEEDINGS

Pages: 279-282

2nd European Workshop on Optical Fibre Sensors

Santander, SPAIN, JUN 09-11, 2004

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 4 Citations

Other information

Authenticus ID: P-000-DMZ

DOI: 10.1117/12.566591

Abstract (EN): An optical fiber sensor for the measurement of oxygen in gaseous environments, which is based on the quenching of the fluorescence of a ruthenium complex, is presented. The sensing chemistry is immobilized in a sol-gel based solid matrix that is coated on a tapered optical fiber probe. Oxygen measurement is performed both by phase and fluorescence intensity spectroscopy. Experimental results show that the fluorescence intensity and the lifetime depend both on oxygen and temperature. A scheme for simultaneous determination of the temperature and the oxygen concentration is proposed. Temperature measurement is performed using the excitation radiation and an absorption long pass filter. Preliminary results are presented which show a temperature measurement independent of oxygen and of optical power level.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4