Distributed grating sensors using low-coherence reflectometry

Volanthen, M., Geiger, H. and Dakin, J.P. (1997) Distributed grating sensors using low-coherence reflectometry. IEEE Journal of Lightwave Technology, 15 (11), 2076-2082. (doi:10.1109/50.641525).

Abstract

Distributed grating sensors have recently been interrogated with low-coherence reflectometry. Initial results have been enhanced using two new and versatile configurations. The first system tracks the wavelength using a closed-loop scheme, while the second system scans the distance using an open-loop approach. Arbitrary strain and temperature profiles along gratings have been examined with 300 µm spatial resolution and 5.4 µ.epsilon/√Hz accuracy. A theoretical model of the interrogation technique is derived and the predicted performance limits are examined experimentally.

This record has no associated files available for download.

Contributors

Download statistics