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Technique for referencing of fiber-optic intensity-modulated sensors by use of counterpropagating signals

Celia Sánchez-Pérez, Augusto García-Valenzuela, G. Eduardo Sandoval-Romero, Joel Villatoro, and Juan Hernández-Cordero

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Abstract

We present a new all-optical fiber-referencing scheme for intensity-modulated sensors. It consists of a closed loop traversed by sensing and reference optical signals in opposite directions. With the proposed scheme the noise induced by power fluctuations of the optical source and mechanical perturbations can be greatly reduced. We experimentally demonstrate the efficiency of the scheme and discuss its use in a sensor array.

© 2004 Optical Society of America

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