Simultaneous measurement of strain and temperature using a unique LPG-coupled fibre laser scheme

Daniel Leandro*, Martin Ams, Manuel López-Amo, Tong Sun, Kenneth T V Grattan

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

1 Citation (Scopus)

Abstract

In this work, we present and demonstrate a novel sensor system for simultaneous measurement of strain and temperature through a unique combination of a long period grating (LPG) and a fibre laser based on a fibre Bragg grating (FBG). In order to achieve this, a new erbium doped fibre laser (EDFL) structure is created, showing an optical signal-to-noise ratio (OSNR) of 55 dB and a peak power measured on the OSA between -5 and 0 dBm. The strain and the temperature variation applied on the FBG and the LPG can be monitored through both the fibre laser wavelength shift and the change of the power level of a unique emission line, both showing a clear linear behaviour.

Original languageEnglish
Title of host publication23rd International Conference on Optical Fibre Sensors
EditorsJosé M. López-Higuera, Julian D. C. Jones, Manuel López-Amo, José L. Santos
Place of PublicationBellingham, WA
PublisherSPIE
Pages1-4
Number of pages4
Volume9157
ISBN (Print)9781628411751
DOIs
Publication statusPublished - 2014
Externally publishedYes
Event23rd International Conference on Optical Fibre Sensors - Santander, Spain
Duration: 2 Jun 20146 Jun 2014

Other

Other23rd International Conference on Optical Fibre Sensors
CountrySpain
CitySantander
Period2/06/146/06/14

Keywords

  • Erbium lasers
  • Fibre Bragg gratings
  • Fibre lasers
  • Long period gratings
  • LPG coupling

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