OSA's Digital Library

Applied Optics

Applied Optics


  • Vol. 41, Iss. 13 — May. 1, 2002
  • pp: 2401–2407

Simultaneous determination of curvature, plane of curvature, and temperature by use of a miniaturized sensing head based on fiber Bragg gratings

F. M. Araújo, L. A. Ferreira, and J. L. Santos  »View Author Affiliations

Applied Optics, Vol. 41, Issue 13, pp. 2401-2407 (2002)

View Full Text Article

Enhanced HTML    Acrobat PDF (205 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



We present what we believe to be a novel miniaturized sensor configuration based on fiber Bragg gratings for simultaneous measurement of curvature and temperature in smart structures and composite materials. Because of the particular geometry of the sensing head, it is possible not only to measure the radius of curvature but also to determine the plane of curvature. We arrange three Bragg gratings in the vertices of the smallest equilateral triangle that can be defined by the cross sections of the fibers. The set is then inserted into a glue-filled capillary stainless-steel tube to provide both suitable protection for the Bragg sensors and rotational symmetry to the sensing head. This tube also ensures isolation from axial strain, allowing for the additional determination of temperature. The proposed sensing head is particularly well suited for applications in smart structures because it can be embedded along any layer of a composite material (including the neutral line) without special concern for the relative orientation of the Bragg gratings and the composite layers. We can also use this sensing configuration to implement more-sophisticated sensors dedicated, for example, to the measurement of multiaxial acceleration or flow and temperature.

© 2002 Optical Society of America

OCIS Codes
(060.2300) Fiber optics and optical communications : Fiber measurements
(060.2310) Fiber optics and optical communications : Fiber optics
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(060.4080) Fiber optics and optical communications : Modulation
(060.4230) Fiber optics and optical communications : Multiplexing

Original Manuscript: July 17, 2001
Revised Manuscript: November 13, 2001
Published: May 1, 2002

F. M. Araújo, L. A. Ferreira, and J. L. Santos, "Simultaneous determination of curvature, plane of curvature, and temperature by use of a miniaturized sensing head based on fiber Bragg gratings," Appl. Opt. 41, 2401-2407 (2002)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. G. B. Havsgård, K. Pran, S. Knudsen, P. O. Baalerud, G. Wang, S. T. Vohra, M. A. Davis, A. Dandridge, A. E. Jensen, “Composite plate drop test using a 16 channel fibre Bragg grating strain sensor system,” in European Workshop on Optical Fibre Sensors, B. Culshaw, J. D. Jones, eds., Proc. SPIE3483, 195–199 (1998). [CrossRef]
  2. E. Friebele, C. G. Askins, M. A. Putnam, A. A. Fosha, J. Florio, R. P. Donti, R. G. Blosser, “Distributed strain sensing with fibre Bragg grating arrays embedded in CRTMTM composites,” Electron. Lett. 30, 1783–1784 (1994). [CrossRef]
  3. P. L. Fuhr, D. R. Huston, P. J. Kajenski, T. P. Ambrose, “Performance and health monitoring of the Stafford medical building using embedded sensors,” Smart Mater. Struct. 1, 63–68 (1992). [CrossRef]
  4. R. M. Measures, A. T. Alavie, R. Maaskant, M. Ohn, S. Karr, S. Huang, “A structurally integrated Bragg grating laser sensing system for a carbon fibre prestressed concrete highway bridge,” Smart Mater. Struct. 4, 20–30 (1995). [CrossRef]
  5. M. A. Davis, A. D. Kersey, T. A. Berkoff, R. T. Jones, R. L. Idriss, M. Kodinduma, “Dynamic strain monitoring of an in-use interstate bridge using fiber Bragg grating sensors,” in Smart Structures and Materials 1997: Smart Systems for Bridges, Structures and Highways,” N. Stubbs, ed., Proc. SPIE3043, 87–95 (1997). [CrossRef]
  6. D. R. Hjelme, L. Bjerkan, S. Neegard, J. S. Rambech, J. V. Aarsnes, “Application of Bragg grating sensors in the characterization of scaled marine vehicle models,” Appl. Opt. 36, 328–336 (1997). [CrossRef] [PubMed]
  7. M. Trutzel, D. Betz, M. Holz, L. Staudigel, O. Krumpholz, H.-F. Siegling, R. Sangkohl, W. Martin, H.-C. Mühlmann, T. Müllert, H. Ahrendt, “Investigation of fiber optic Bragg grating sensors for applications in the aviation industry,” in 13th International Conference on Optical Fiber Sensors, H. Hotate, B. Kim, eds., Proc. SPIE3746, 624–627 (1999).
  8. S. Magne, S. Rougeault, M. Vilela, P. Ferdinand, “State-of-strain evaluation with fiber Bragg grating rosettes: application to discrimination between strain and temperature effects in fiber sensors,” Appl. Opt. 36, 9437–9447 (1997). [CrossRef]
  9. Ed. B. Culshaw, Smart Structures and Materials (Artech House, Boston, Mass., 1996), Chap. 6, pp. 157–184.
  10. Ed. E. Udd, Fibre Optic Smart Structures (Wiley, New York, 1995), Chap. 12, pp. 319–360.
  11. M. G. Xu, J.-L. Archambault, L. Reekie, J. P. Dakin, “Thermally-compensated bending gauge using surface-mounted fibre gratings,” Int. J. Optoelectron. 9, 281–289 (1994). [CrossRef]
  12. V. Bathia, T. D’Alberto, K. A. Murphy, R. O. Claus, “Optical fibre long-period grating sensors,” in Proceedings of the 11th International Conference on Optical Fibre Sensors (Japan Society of Applied Physics, Tokyo, 1996).
  13. M. J. Gander, W. N. MacPherson, R. McBride, J. D. C. Jones, L. Zhang, I. Bennion, P. M. Blanchard, J. G. Burnett, A. H. Greenaway, “Bend measurement using Bragg gratings in multicore fibres,” Electron. Lett. 36, 120–121 (2000). [CrossRef]
  14. O. G. Okhotnikov, F. M. Araújo, J. R. Salcedo, “Wavelength switching in pump diode modulated mode locked and Q-switched Er fibre laser,” Appl. Phys. Lett. 65, 2910–2912 (1994). [CrossRef]
  15. L. A. Ferreira, F. M. Araújo, J. L. Santos, F. Farahi, “Temperature and strain insensitive bend measurements with D-type fibre Bragg gratings,” in 14th International Conference on Optical Fiber Sensors, A. G. Mignani, ed., Proc. SPIE4185, 5–8 (2000).

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited