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Environmentally Insensitive Diaphragm Reflectance Pressure Transducer

A novel fiber optic sensor that determines pressure from diaphragm curvature is discussed. This sensing technique exhibits a high degree of sensitivity and linearity and is less susceptible to environmental perturbations than previous intensity modulating techniques. Experimental results are presented for a pressure transducer operational in the 0-60 psi range, and a miniature pressure transducer operational in the 0-5 psi range designed for in vivo medical applications.