Localized strain measurements using an integration method to process intensity reflection spectra from a chirped FBG

A. Nand, D. J. Kitcher, S. A. Wade, R. Jones, G. W. Baxter, S. F. Collins

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

5 Citations (Scopus)


A chirped fiber Bragg grating was used to measure the non-uniform strain profile of a notched aluminum specimen used to simulate a cracked structure. The specimen was subjected to tensile tests that produced regions of non-uniform strain near the notches. Analysis of power reflectance spectra from the grating, through the use of an integration method, enabled the strain profile near the notches to be determined. Unlike other intragrating sensing methods, this method did not require a disturbance hypothesis to be postulated. The strain profile results from this intragrating sensor were in reasonable agreement with predictions from modeling conducted using the finite element method.

Original languageEnglish
Title of host publicationEWOFS 2007 Proceedings
Subtitle of host publicationThird European Workshop on Optical Fibre Sensors
Publication statusPublished - 4 Dec 2007
EventEuropean Workshop on Optical Fibre Sensors 2007 - Napoli, Italy
Duration: 4 Jul 20076 Jul 2007
Conference number: 3rd
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/6619.toc (Proceedings)

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceEuropean Workshop on Optical Fibre Sensors 2007
Abbreviated titleEWOFS 2007
Internet address


  • Chirped fiber Bragg grating
  • Intragrating sensing
  • Strain measurement

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