To make a gas sensor suitable for use at high temperatures, we have used a sol-gel-processing technique to bond a copper-exchanged zeolite fluorescence indicator onto the end of an all-silica optical fiber. Experimental results from single-fiber prototype sensors show they can be used to measure either the oxygen concentration or the equivalence ratio for gas mixtures containing weak or strong reductants, respectively.
© 1999 Optical Society of America
Jeffrey T. Remillard, Jeffrey R. Jones, Ben D. Poindexter, Chaitanya K. Narula, and Willes H. Weber, "Demonstration of a High-Temperature Fiber-Optic Gas Sensor Made With a Sol-Gel Process to Incorporate a Fluorescent Indicator," Appl. Opt. 38, 5306-5309 (1999)