Abstract

A novel solgel process for making porous silica fiber and doping the fiber core with sensing material is described. A CoCl2-doped solgel fiber was fabricated and was used to construct an active-core optical fiber moisture sensor. Test results show that the sensitivity of the active-core optical fiber sensor is much higher than that of an evanescent-wave-based optical fiber sensor.

© 2002 Optical Society of America

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