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Fiber-optic acoustic sensors with increased sensitivity by use of composite structures

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Abstract

Fiber-optic acoustic sensors having sensitivity nearly 2 orders of magnitude greater than that of sensors using bare fiber are reported. These new devices utilize a composite structure wherein the fiber is embedded in a material of lower elastic modulus that serves to increase the stress, and hence the optical phase shift, in the fiber for a given pressure.

© 1979 Optical Society of America

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