The interrogation and multiplexing of long period grating curvature sensors using a Bragg grating based, derivative spectroscopy technique

Allsop, Thomas D.P., Earthrowl, T., Reeves, R., Webb, David J. and Bennion, Ian (2004). The interrogation and multiplexing of long period grating curvature sensors using a Bragg grating based, derivative spectroscopy technique. Measurement science and technology, 15 (1), pp. 44-48.

Abstract

A long period grating is interrogated with a fibre Bragg grating using a derivative spectroscopy technique. A quasi-linear relationship between the output of the sensing scheme and the curvature experienced by the long period grating is demonstrated, with a sensitivity of 5.05 m and with an average curvature resolution of 2.9 × 10-2 m-1. In addition, the feasibility of multiplexing an in-line series of long period gratings with this interrogation scheme is demonstrated with two pairs of fibre Bragg gratings and long period gratings. With this arrangement the cross-talk error between channels was less than ± 2.4 × 10-3 m-1.

Uncontrolled Keywords: long period grating, fibre Bragg grating, derivative spectroscopy technique, sensing scheme, curvature experienced
Published Date: 2004

Download

Full text not available from this repository.

Export / Share Citation


Statistics

Additional statistics for this record