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DFB fibre laser sensor for simultaneous strain and temperature meansurements in concrete structures

Record type: Conference or Workshop Item (Paper)

A distributed feedback (DFB) fiber laser sensor for simultaneously measuring strain and temperature has been developed. The DFB fiber laser consists of a single fiber Bragg grating written in a low birefringent rare-earth doped fiber. By measuring the rf beat frequency between the two orthogonal polarized lasing modes and the absolute wavelength of one mode, both strain and temperature can be determined simultaneously to an accuracy of plus or minus 3 (mu) (epsilon) and plus or minus 0.04 degrees Celsius. Multiplexing capabilities make this sensor ideal for monitoring several locations within a civil engineering structure. Three gauge protection systems were developed to prevent damage to the fiber during embedment and insulate it from the high alkaline environment of the concrete. This sensor is easy to install, provides excellent strain transfer from the concrete to the optical fiber and is thin enough not to degrade the concrete structure

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Citation

Richards, D. J., Hadeler, O. and Dakin, J.P., (1999) DFB fibre laser sensor for simultaneous strain and temperature meansurements in concrete structures Claus, Richard O. and Spillman, William B. (eds.) In Proceedings of Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials. vol. 3670, The International Society for Optical Engineering., pp. 332-341. (doi:10.1117/12.349744).

More information

Published date: 1999
Venue - Dates: Smart Structures and Materials 1999: Sensory Phenomena and Measurement Instrumentation for Smart Structures and Materials, United States, 1999-03-03 - 1999-03-04

Identifiers

Local EPrints ID: 74703
URI: http://eprints.soton.ac.uk/id/eprint/74703
ISBN: 9780819431448
ISSN: 0277-786X
PURE UUID: e8bc6653-d726-4b7d-89a3-7171e6fd91f0

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:45

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Contributors

Author: D. J. Richards
Author: O. Hadeler
Author: J.P. Dakin
Editor: Richard O. Claus
Editor: William B. Spillman

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