Optical fiber sensor toward pyridine vapors detection

Cesar Elosua; Candido Bariain; Ignacio R. Matias; Antonio Rodriguez; Enrique Colacio; Alfonso Salinas; Antonio Segura; Alberto Fernandez

doi:10.1117/12.786036

16 May 2008 Optical fiber sensor toward pyridine vapors detection

Cesar Elosua, Candido Bariain, Ignacio R. Matias, Antonio Rodriguez, Enrique Colacio, Alfonso Salinas, Antonio Segura, Alberto Fernandez

Author Affiliations +

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 70042Y (2008) https://doi.org/10.1117/12.786036
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

Abstract

A novel vapochromic complex has been used to develop an optical fiber device sensitive to pyridine vapors. In solid state, this material is blue, and in the presence of pyridine vapors, its color changes to pink-white. The vapochromic material is solved in tetrahydrofuran (THF) and immobilized in a plasticized polymeric, fixing it onto a cleaved ended optical fiber pigtail by dip coating. The fabrication process was optimized in terms of number of dips and dipping speed, evaluating the final devices by dynamic range. Employing a reflection set up, the response of the sensors was registered in terms of absorbance spectrum and changes in reflected optical power. Devices showing a linear response with different vapors concentrations were obtained, with a detection limit of 1 PPM (v/v).

Citation Download Citation

Cesar Elosua, Candido Bariain, Ignacio R. Matias, Antonio Rodriguez, Enrique Colacio, Alfonso Salinas, Antonio Segura, and Alberto Fernandez "Optical fiber sensor toward pyridine vapors detection", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 70042Y (16 May 2008); https://doi.org/10.1117/12.786036

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