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Applied Optics

Applied Optics


  • Vol. 40, Iss. 1 — Jan. 1, 2001
  • pp: 145–149

Intracore fiber Bragg gratings for strain measurement in embedded composite structures

V. M. Murukeshan, P. Y. Chan, Lin Seng Ong, and A. Asundi  »View Author Affiliations

Applied Optics, Vol. 40, Issue 1, pp. 145-149 (2001)

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An intracore Bragg grating written on a photosensitive fiber core is used for strain measurement in composite specimens under load. The strain information is directly related to the absolute change in the Bragg-reflected wavelength. Fiber Bragg grating (FBG) sensors (fibers with intracore gratings) are thus sensitive to strain that is caused by changes in temperature as well as to load-induced changes. Thus these sensors can be made to be independent of source intensity variations and losses. FBG sensors used for load-induced strain sensing in composite structures and the effects of temperature on them are discussed. A detailed account of the use of such embedded structures as self-monitoring nondestructive testing devices is given.

© 2001 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing

Original Manuscript: August 24, 2000
Revised Manuscript: August 24, 2000
Published: January 1, 2001

V. M. Murukeshan, P. Y. Chan, Lin Seng Ong, and A. Asundi, "Intracore fiber Bragg gratings for strain measurement in embedded composite structures," Appl. Opt. 40, 145-149 (2001)

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