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Optical fiber sensor having a sol-gel fiber core and a method of making

United States Patent

June 6, 2006
View the Complete Patent at the US Patent & Trademark Office
A simple, economic wet chemical procedure is described for making sol-gel fibers. The sol-gel fibers made from this process are transparent to ultraviolet, visible and near infrared light. Light can be guided in these fibers by using an organic polymer as a fiber cladding. Alternatively, air can be used as a low refractive index medium. The sol-gel fibers have a micro pore structure which allows molecules to diffuse into the fiber core from the surrounding environment. Chemical and biochemical reagents can be doped into the fiber core. The sol-gel fiber can be used as a transducer for constructing an optical fiber sensor. The optical fiber sensor having an active sol-gel fiber core is more sensitive than conventional evanescent wave absorption based optical fiber sensors.
Tao; Shiquan (Starkville, MS), Jindal; Rajeev (Starkville, MS), Winstead; Christopher (Starkville, MS), Singh; Jagdish P. (Starkville, MS)
Mississippi State University (Mississippi State, MS)
10/ 046,731
January 17, 2002
This invention was made with U.S. Government support under Contract No. DE-FC26-98FT-40395 awarded by the Department of Energy. The U.S. Government may have certain rights in this invention.